Sentron™ Switchboards
Types SB1, SB2, SB3 and RCIII
General
7
Type SB1 Switchboard Pictorial
Sentron™
Switchboards
Type SB2 Switchboard Pictorial
Whether the design is for a 240V AC,
400 ampere system; a 600V AC, 4000
ampere system; or something in
between, Siemens Switchboards should
be considered. Every aspect of design
has been aimed at improving layout convenience, reducing installation costs, and
minimizing the impact and cost of system changes. These switchboards provide the rugged construction and service
flexibility necessary in systems for industrial plants, hi-rise complexes, hospitals,
and commercial buildings, and are built to
UL-891 and NEMA PB-2 standards.
Type SB1 for Limited Space
Applications
The SB1 switchboard has been specifically designed for those applications
where floor space is at a premium. The
rear of all sections align so the switchboard can be installed against a wall. The
SB1 contains front-connected main protective devices and through-bus ratings
up to 2000 amperes at 600V AC.
Type SB2 for Increased Service and
More Load Cable Room
Siemens SB2 switchboard can have extra
depth behind the vertical bus in each distribution section, and contains main protective devices and through-bus rated up
to 4000 amperes at 600V AC. The rear of
all sections align as a standard. Front and
rear alignment is available as an option.
Type SB3 For Custom Options
The SB3 switchboard is available with
main bus up to 6000 amperes. All sections are front and rear aligned. Options
include, but are not limited to, incoming
and outgoing busway, Siemens
ACCESS™ System communications,햲
and cold sequence utility C.T.
Compartments.
Type RCIII Rear Connected
Switchboards
The RCIII switchboard differs from the
SB3 switchboard primarily in the mounting of the devices in the distribution section. The branch and feeder devices are
individually mounted. Because of this
method of mounting, access to outgoing
cable terminations must be from the rear
of the switchboard. Bus bar extensions
from the feeder devices are run back to
the rear of the unit for easy access.
The front and rear of all sections align,
designed for mounting away from the
wall. RCIII switchboards will accommodate systems up to 6000 amperes, 600
volts maximum in any three-phase threewire or three-phase four-wire configuration. The main bus can be specified for
600 to 6000 ampere rating. Main devices
and bus ties are available up to 5000
amperes, branch devices up to 2000
amperes. As with Type SB3, the RCIII
switchboard can be of indoor or outdoor
NEMA 3R construction.
Switchboard Distribution Sections
All standard distribution sections are 90 in.
(2286) mm) high and 38 in. (965 mm)
wide. Optional height of 70 in. (1778 mm)
and optional width of 32 in. (813 mm) and
46 in. (1168 mm) are also available.
SB1 distribution sections are 20 in.
(508 mm) deep. For deeper sections, SB2
and SB3 switchboards must be chosen.
SB2 distribution sections have a standard
depth of 20 in. (508 mm) but can also be
specified in depth of 28 in. (711 mm) and
38 in. (965 mm) when additional space is
required. Rear access is required to make
use of the additional depth of the SB2 and
SB3 switchboards, and to provide access
to bus connections, where required. SB2
may be installed against a wall.
햲 See
Section 1 of this Guide for a complete discussion of
Siemens ACCESS™ system.
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
99
Sentron™ Switchboards
Types SB1, SB2, SB3 and RCIII
General
7
Type SB1 Switchboard Pictorial
Sentron™
Switchboards
Type SB2 Switchboard Pictorial
Whether the design is for a 240V AC,
400 ampere system; a 600V AC, 4000
ampere system; or something in
between, Siemens Switchboards should
be considered. Every aspect of design
has been aimed at improving layout convenience, reducing installation costs, and
minimizing the impact and cost of system changes. These switchboards provide the rugged construction and service
flexibility necessary in systems for industrial plants, hi-rise complexes, hospitals,
and commercial buildings, and are built to
UL-891 and NEMA PB-2 standards.
Type SB1 for Limited Space
Applications
The SB1 switchboard has been specifically designed for those applications
where floor space is at a premium. The
rear of all sections align so the switchboard can be installed against a wall. The
SB1 contains front-connected main protective devices and through-bus ratings
up to 2000 amperes at 600V AC.
Type SB2 for Increased Service and
More Load Cable Room
Siemens SB2 switchboard can have extra
depth behind the vertical bus in each distribution section, and contains main protective devices and through-bus rated up
to 4000 amperes at 600V AC. The rear of
all sections align as a standard. Front and
rear alignment is available as an option.
Type SB3 For Custom Options
The SB3 switchboard is available with
main bus up to 6000 amperes. All sections are front and rear aligned. Options
include, but are not limited to, incoming
and outgoing busway, Siemens
ACCESS™ System communications,햲
and cold sequence utility C.T.
Compartments.
Type RCIII Rear Connected
Switchboards
The RCIII switchboard differs from the
SB3 switchboard primarily in the mounting of the devices in the distribution section. The branch and feeder devices are
individually mounted. Because of this
method of mounting, access to outgoing
cable terminations must be from the rear
of the switchboard. Bus bar extensions
from the feeder devices are run back to
the rear of the unit for easy access.
The front and rear of all sections align,
designed for mounting away from the
wall. RCIII switchboards will accommodate systems up to 6000 amperes, 600
volts maximum in any three-phase threewire or three-phase four-wire configuration. The main bus can be specified for
600 to 6000 ampere rating. Main devices
and bus ties are available up to 5000
amperes, branch devices up to 2000
amperes. As with Type SB3, the RCIII
switchboard can be of indoor or outdoor
NEMA 3R construction.
Switchboard Distribution Sections
All standard distribution sections are 90 in.
(2286) mm) high and 38 in. (965 mm)
wide. Optional height of 70 in. (1778 mm)
and optional width of 32 in. (813 mm) and
46 in. (1168 mm) are also available.
SB1 distribution sections are 20 in.
(508 mm) deep. For deeper sections, SB2
and SB3 switchboards must be chosen.
SB2 distribution sections have a standard
depth of 20 in. (508 mm) but can also be
specified in depth of 28 in. (711 mm) and
38 in. (965 mm) when additional space is
required. Rear access is required to make
use of the additional depth of the SB2 and
SB3 switchboards, and to provide access
to bus connections, where required. SB2
may be installed against a wall.
햲 See
Section 1 of this Guide for a complete discussion of
Siemens ACCESS™ system.
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
99
Sentron™ Switchboards
Types SB1, SB2, SB3, and RCIII
General
Sentron™
Switchboards
7
RCIII Switchboard –– Fixed Mounted
Devices
Table 7.2
Molded
Case
Circuit
Mounting
Breaker
Individual Panel Fixed
400-2000A
Yes
400-1200A
Yes
400-3200A
Yes
Yes
400-1200A
Yes
400-3200A
Yes
400-1200A
Yes
No
400-3200A
Switchboard
Type
SB1
SB2
SB3
RCIII
RCIII Switchboard –– Drawout Mounted
Devices
Table 7.1
General
Main
Switch- Bus
board Ampere
Rating
Type
SB1
to 2000
SB2
to 4000
SB3
to 6000
RCIII
to 6000
햲
Connected
Front
Front
Front
Rear
Access
Front
Front
Rear
Rear
Install
Against
Wall?
Yes
Yes
No
No
Distribution section with two high 800 or 1200A
Vacu- Break is 28 in. (711 mm) deep.
Distribution section with two high bolted pressure
switch is 38 in. (965 mm) deep minimum.
햴 Width depends on branch device. See page 128.
햵 Fixed mounted only.
햶 Drawout or fixed mounted.
Main Devices
Table 7.3
SB3
RCIII
Yes-Rear
Table 7.4
Bolted
Pressure
Fusible
Switch
Fixed
800-2000A
—
800-4000A
—
800-4000A
—
800-4000A
VacuBreak
Fusible
Switch
Fixed
30-600A
800-1200A
30-600A
800-1200A
HCP
Fusible
Switch
400-1200A
400-1200A
400-1200A
400-1200A
Bolted
Pressure
Fusible
Switch
Fixed
—
—
—
800-4000A
30-600A
100-1200A
400-1200A
400-1200A
—
800-4000A
Insulated
Case
Breaker
—
800-4000A 햵
—
800-5000A 햶
—
800-5000A
Fixed /
Drawout
LV
Power
Circuit
Breaker
—
—
—
800-4000A
Drawout
Yes
No
15-1200A
100-2000A
Insulated
Case
Breaker
—
—
—
800-2000A 햶
—
—
800-4000A
Fixed /
Drawout
LV
Power
Circuit
Breaker
—
—
—
—
—
800-1600A
Drawout
Distribution Sections
햳
100
HCP
Fusible
Switch
400-1200A
400-1200A
400-1200A
400-1200A
400-1200A
400-1200A
400-1200A
Branch Devices
Molded
Case
Circuit
Mounting
Breaker
Individual Panel Fixed
No
15-1200A
Yes
Yes
—
Yes
15-1200A
Yes
400-3000A
Switchboard
Type
SB1
SB2
VacuBreak
Fusible
Switch
Fixed
800-1200A
400-600A
400-1200A
400-600A
400-1200A
400-600A
400-1200A
Switchboard
Type
SB1
Access
Front
Dimensions in inches (mm)
Height
Width
Std.
Opt.
Std.
90 (2286) —
38 (965)
SB2
Front
90 (2286)
—
38 (965)
SB3
Front &
Rear
90 (2286)
70 (1778)
38 (965)
RCIII
Rear
90 (2286)
70 (1778)
25, 32, 38,
(635, 813,
or 965) 햴
Siemens Electrical Products and Systems
Specification Guide
Opt.
32 or 46
(813 or 1168)
32 or 46
(813 or 1168)
32 or 46
(813 or 1168)
32 or 46
(813 or 1168)
Depth
Std.
20 (508)
Opt.
—
20 (508) 햲
20 (508) 햲 햳
48 or 58
(1219 or 1473)
28 or 38
(711 or 965) 햲
28, 38, 48, or 58
(711, 965, 1219
or 1473) 햲 햳
—
CSI Section 16470
Sentron™ Switchboards
Types SB1, SB2, SB3, and RCIII
Service Sections
Service Section Options Utility
Metering
In addition to the main disconnect, the
service section usually contains utility
metering provisions. ”Hot“ metering
(CT‘s on the line side of the main disconnect) is normal, but ”cold“ metering provisions (CT‘s on the load side of the main
disconnect) can also be furnished.
Whether hot or cold metering is required,
the CT’s provided by the utility company
will be mounted in a completely separate
compartment. The compartment will be
built to utility company standards, with
hinged doors and provisions for metering
equipment provided by the utility.
with the main disconnect. A separate
section would be needed only if a large
instrument or an unusual number of
instruments were required.
Main Disconnect Options
Main protective devices can be mounted
individually for quick access in an emergency. Switchboards will accommodate a
variety of main protective devices.
Selection depends on the characteristics
of each electrical system.
Type RL Power Circuit Breakers
Power circuit breakers, 800 – 5000
amperes, 600 volts AC, with solid-state
overcurrent trip devices offer storedenergy tripping plus optional ground fault
protection, selective tripping, and a broad
range of accessories.
Type RL, LV Power Circuit Breaker
Type SB Encased Systems Breakers
Insulated case circuit breakers, 800 – 5000
amperes, 600 volts AC, with solid-state
trip devices, offer stored energy tripping
plus optional ground fault protection,
selective tripping, and a broad range of
accessories.
Extra Heavy Duty Breakers
High-interrupting-capacity thermalmagnetic breakers, 400 – 2000 amperes,
600 volts AC, provide increased protections where high available fault currents
exist, with the same convenience and
accessory feature offered in standard
interrupting capacity breakers.
Solid-State Sensitrip®
Full function breakers 400 – 3200
amperes, 600 volts AC, have solid-state
circuitry which assures minimal damage
through the quick interruption control of
fault currents, and includes short-time
delay and ground fault trip for branch
device coordination.
Fuseless Current Limiting
Molded case breakers, 400 – 1600
amperes, 600 volts AC, with thermalmagnetic protection provide coordinated
protection for branch devices and circuits
where extremely high fault currents are
available. Solid state current limiting
molded case breakers also available in
ratings of 400 – 1600A.
Fusible Switches
Vacu-Break® Fusible Switches, 400 – 1200
amperes, 600 volts AC, provide protection, coordination with branch protective
fusible switches, and application flexibility
in systems where high available fault
currents are encountered.
HCP Fusible Switch
HCP switches, 400 – 1200 amperes,
600 volts AC, combine economy with
extremely high interrupting capacity in
conjunction with Class J and Class L
fuses. Has visible contacts and optional
auxiliary contacts, shunt trip and ground
fault relaying.
Bolted Pressure Switches
Bolted pressure switches, 800 – 4000
amperes, 480 volts AC, combine economy with extremely high interrupting
capacity in conjunction with Class L
fuses. Options include short trip, ground
fault relaying, and a wide range of other
accessories.
Type SB Encased Systems Breaker
Customer Metering Compartment
Customer Metering
The service section often provides
space for many user instrument requirements. Ammeters, voltmeters, and their
associated selector switches can be
mounted in the service section along
CSI Section 16470
Molded Case Circuit Breakers
Heavy Duty
Standard interrupting capacity, thermalmagnetic breakers, 400 – 2000 amperes,
600 volts AC, provide protection that
allows “immediate restoration of power”
for normal system requirements. A wide
range of accessory options is available,
including shunt trip, motor operator, auxiliary switches, alarm switches, and others.
Siemens Electrical Products and Systems
Specification Guide
Ground Fault Relays
All main protective devices, except
Vacu-Break fusible switches, can be
equipped with ground fault relays to
comply with the National Electrical Code
(Section 230-95) ground fault protection
requirements.
101
7
Sentron™
Switchboards
Bussed or Non-Bussed Pull Sections
With Siemens switchboards, a nonbussed pull section, or a cross-bussed
pull section for underground feed can
be selected. The unique cross-bussed
section permits cable to be run straight
from underground to the bus bars at the
top of the section. Non-bussed pull sections have openings for carrying the
underground feed cables to the service
section bus.
Typical switchboards consist of a service
section, and one or more distribution sections. Service sections can be fed directly
from overhead by cable or busway.
When fed from underground, a separate
pull section is usually added. The service
section is then fed from the adjacent
underground pull section.
Bolted Pressure Switches, Vacu-Break®
and HCP Switches equipped for bottom
feed will accept cable directly from
underground into the service section.
General
Sentron™ Switchboards
Front-Connected Construction –– Types SB1, SB2, and SB3
Sentron™
Switchboards
7
Bus Bars Design
Siemens switchboard bus bars are available in standard tin-finished aluminum or
optional silver-finished copper. Standard
bus is sized to limit heat rise to 65°C
above an ambient temperature of 40°C
maximum in accordance with UL 891.
As an option, conductor material can be
sized according to density limits, based
on bus material. The applicable limits are:
Aluminum — 750 amperes / sq. in.
Copper — 1000 amperes / sq. in.
In accordance with NEMA and UL 891
standards, at each distribution section,
the through-bus capacity is reduced as
load is taken off. The through-bus is
tapered to a minimum of one-third the
ampacity of the incoming service mains.
If required by special system characteristics, switchboards can be supplied with
optional full-capacity bus; i.e., the ampacity of the through-bus remains at the full
ampacity of the main throughout the
switchboard.
Splice Plates
All splice plates can be accessed, bolted,
and unbolted from the front of the
switchboard to make connection of
adjacent sections easy. Each splice plate
is attached with one 1/2-inch grade 2
bolt, and a 2-inch or 3-inch Belville
washer on each end. This reduces installation time while increasing contact
pressure at the joint.
To make installation and servicing of the
splice plates easier, all phase and neutral
through-busses are stacked one above
the other, eliminating the need to stuff
bolts in between bus bars that are
stacked one behind the other in the
same horizontal plane.
Disconnect Links in Service Entrance
Equipment
In switchboard service sections to be
used as service entrance equipment on
1Ø3W and 3Ø4W systems, provisions
must be included to isolate the neutral
bus from the grounded service neutral.
This removable link gives you the ability
to check branch neutral continuity on the
load side of the main disconnect.
To maintain a service ground to the
switchboard frame while the neutral
link is removed, a bonding strap is connected from the switchboard frame to
the neutral bus on the line side of the
removable link.
UL and “SUSE” (suitable for use as service entrance) labels will be furnished on
102
Bus Bars and Lug Construction
General
Splice Plates
service sections specified for service
entrance.
Cable Terminals
Screw mechanical connectors (lugs) are
provided as standard equipment on all
devices. However, compression connectors are available as an option on all main
lugs, main bolted pressure switches,
main power circuit breakers, main
molded case, main fusible devices, and
main insulated case circuit breakers.
Distribution Sections
Siemens switchboard distribution sections are engineered for accessibility and
expanded use. For expanded wiring room
and exceptional accessibility, generous
top and bottom gutters have been created by locating through-bus in the rear
center of the distribution section. In cable
entrance sections, no obstructions are
less than 8 in. (203 mm) above the floor,
and no live bus bars are located less than
10 in. (254 mm) off the floor. So there is
plenty of room to run cables into the distribution section for connections.
Standard bolted gutter covers give complete access to load conductors. Optional
hinged gutter covers can be furnished
where quick access to load connectors is
desired.
Heavy channels form a rigid ring at the
base and top of each section, and heavy
gauge structural members are used for
the vertical corner posts eliminating
encroachment of additional bracing into
the top and bottom gutter areas.
To provide additional room for top load
cable routing where needed, pull box
extensions are available in heights of
10,15, 20, 25, and 30 in. (254, 381, 508,
and 762 mm) to mount on any standard
distribution section. Top plates on all sec-
Siemens Electrical Products and Systems
Specification Guide
Screw Mechanical Connectors
tions are easily removed in the field for
drilling, punching, and cutting conduit
entry holes.
Because all distribution sections can
accommodate any combination of panelmounted branch devices, including
molded case circuit breakers, Vacu-Break
fusible switches, and motor starters,
future system modifications are easier
to handle without adding switchboard
sections.
To make additional distribution sections
easier to install when they are necessary,
the through-bus in each distribution section is extended, and the end is predrilled to accept splice plate bolts. To add
a section to an existing switchboard, set
the new section flush against the side of
the existing distribution section, and bolt
together the bus bar splice plates.
CSI Section 16470
Sentron™ Switchboards
Front Connected Construction –– Types SB1, SB2, and SB3
General
Distribution Sections (cont’d)
Distribution sections of SB1, SB2, and
SB3 switchboards can accept any combination of molded case circuit breakers
and fusible switches. If the system calls
for a mixture of these devices, there is
the option of grouping the devices in logical patterns within a single section. A
separate section is not needed for each
type of device. And because all types of
devices can be put in a single section,
the total number of sections required in
the system can be reduced.
For future modifications, devices can be
added or replaced as the system grows
and changes. If a motor starter has to be
added after the installation, an entire
switchboard section need not be provided
to house it. It can be installed in any distribution section with available unit space.
7
Sentron™
Switchboards
Operating Temperatures
All distribution sections contain louvers
both at the top and bottom to assure
cool operation in accordance with UL
Standard 891.
Bus Location
All through-bus to adjoining sections is
located in the rear center of the distribution section. This design provides large,
unobstructed wiring gutters at the top
and bottom of each section. Wiring takes
less time and costs less to install.
Motor Starter Switchboards
Type SB3 switchboards offer a complete
line of group-mounted starters that provide a compact and convenient method
of combining power distribution and
control circuits in one location.
Motor starter units are available with fully
bussed circuit breaker or fusible VacuBreak units, factory-wired on the load
side to full voltage, non-reversing starters
to reduce installation time.
Type A wiring is standard without terminal blocks. The fusible switch, circuit
breaker, or starter unit is factory wired;
however, control and load cabling is
connected by the installer directly onto
the starter.
Type B wiring is available as an option.
Control wiring is brought out to terminal
blocks and identified. Starter load terminals are conveniently located near the
vertical wiring gutters and adjacent to
control terminal blocks. No wiring external to the unit is furnished.
Type C wiring is not available in motor
starter switchboards.
CSI Section 16470
Front Connected Switchboards, Type SB1
Siemens Electrical Products and Systems
Specification Guide
103
Sentron™ Switchboards
Rear Connected Construction — Type RClll
General
RClll Construction Details —
Distribution Feeder Section
Siemens Type RClll switchboard differs
from front connected switchboards primarily in the distribution section. The
branch and feeder devices are individually
mounted. Because of this method of
mounting, access to outgoing cable terminations must be from the rear. Bus bar
extensions from the feeder devices are
run back to the rear of the unit for easy
access.
7 Molded Case Circuit
Sentron™
Switchboards
Breakers
Fixed or Plug-in Individually Mounted
Devices
This design consists of a front section
where the distribution devices are
mounted, a bus section in the center, and
a cable termination area in the rear. The
front metal cover represents a grounded
protection for the operator at the front of
the switchboard. The main through-bus
runs near the bottom of the switchboard.
Section bus risers from the main bus are
located in the center of the distribution
section with taps to branch breakers.
The load side terminals of each front
mounted device are extended through
the bus compartment into the rear cable
compartment. These bus extensions are
insulated where necessary as they pass
Type SB Encased
Systems Breakers
Drawout or Fixed Mounted Devices
Insulated case circuit breakers are individually mounted in their own compartments as standard. Metal barriers are
provided at the sides of each compartment and an insulation horizontal barrier
is located between breakers in the same
vertical section. Access is provided
through a removable cover on fixed
mounted breakers and a hinged access
door on drawout breakers.
The insulated case circuit breaker drawout assembly is a self-contained, integral
unit that permits quick circuit breaker
replacement or inspection and maintenance of breakers without de-energizing
the entire switchboard. The easily accessible and maintainable spring loaded primary disconnect fingers are mounted on
the breaker. The drawout assembly consists of a stationary frame and a movable
carriage to support the breaker. The secondary disconnects for accessory control
circuits are mounted on the movable carriage. A matching set is mounted on the
104
Front View
Rear View
Type RClll Switchboard with Individually Mounted Molded Case Circuit Breakers
the main bus bars. Additional protection
can be provided with optional barriers
between devices and bus compartment,
between individual devices, between bus
and cable compartment, and between
vertical sections.
For further information on Siemens
molded case circuit breakers, see
Section 17.
stationary frame. The drawout design of
insulated case circuit breakers makes it
possible to place the breaker in a fully
withdrawn, disengaged test, or engaged
position. The load side of each breaker
has bus bars extending into the rear cable
compartment. Additional protection can
be provided with optional barriers
between the bus and cable compartment
and between vertical sections. For further
information on Siemens SB breakers, see
Section 16.
Type RClll Switchboard with SB Encased Systems Breakers.
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Rear Connected Construction — Type RClll
General
Distribution Feeder Section
Type SB Encased Systems Breakers
7
Sentron™
Switchboards
Front View of Incoming Service and
Distribution Feeder Section
Rear View of Bus and Cable Compartment
of Feeder System –– Barriers Installed
Rear View of Bus and Cable Compartment
of Feeder System –– Barriers Removed
Type RL Low Voltage Power Circuit Breakers
Transformer
Connection
Front View
Rear View
Incoming Service and Distribution Feeder Section for Type RL Drawout LV Power Circuit Breakers.
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
105
Sentron™ Switchboards
Rear Connected Construction — Type RClll
General
Type RL Low Voltage Power
Circuit Breakers (cont’d)
Distribution Feeder Section
Drawout low-voltage power circuit breakers are also individually mounted in their
own compartments as standard. Metal
barriers are provided at the sides and rear
of each compartment and a horizontal
metal barrier is located between breakers
in the same vertical sections. Access is
provided through a hinged metal door on
each breaker compartment.
Sentron™
Switchboards
7
Safe Closed-Door Drawout Mechanism
The low voltage power circuit breaker
can be moved from “connect” through
“test” to “disconnect” position without
opening the door. In the “connect” position, both the primary and secondary disconnects are engaged. In the “test”
position, the primary disconnect terminals are disengaged; however, the secondary disconnects are maintained to
permit operation of the circuit breaker. In
the “disconnect” position, the primary
and secondary disconnects are disengaged and separated a safe distance
from the corresponding stationary terminals. In the “fully withdrawn” position,
both primary and secondary contacts are
disconnected and the circuit breaker may
be inspected or removed for more complete accessibility.
The load side of each breaker has bus
bars extending from the rear of the
primary disconnect through the bus compartment into the rear cable compartment. Additional optional barriers can be
provided between bus and cable compartments and between vertical sections.
Testing
Testing conducted by Siemens includes
both production testing of switchboard
sections for compliance with UL requirements, and developmental, design verification, and quality control testing.
Production tests check structural integrity
and are performed on all switchboard sections in accordance with UL procedures.
A test voltage equal to twice the rated
voltage plus 1000 volts (Vt = 2Vr + 1000)
is applied for one minute to each switchboard section to check the integrity of the
conductor and insulator materials, and the
switchboard assembly. These tests are
performed routinely to verify proper
equipment fabrication and assembly.
106
Type RCIII Cutaway Side View
For more sophisticated design verification
and developmental testing a separate laboratory is used. This test lab is fully
instrumented for advanced, multi-phase
electrical test work over a wide range of
system conditions.
Among the tasks performed is the determination of heat rise at busway connections, and at protective device
terminations on both line and load sides.
All heat rise tests are conducted in strict
accordance with applicable UL standards.
Heat rise data from the tests are carefully compared to UL allowable levels.
Siemens Electrical Products and Systems
Specification Guide
Another important laboratory program is
the systematic verification of short circuit
withstand capabilities for all switchboard
conductor materials. Switchboard bus
has been thoroughly tested and is UL
short circuit withstand rated (UL File
#E-22578). Switchboard sections with
designs conforming to test specifications
will carry a label noting the short circuit
current withstand rating applicable to that
section. For additional information on
Siemens RL breakers, see pages 54-61.
CSI Section 16470
Sentron™ Switchboards
Modifications and Accessories
Metering
Utility Metering
Requirements for power company metering and instrument transformer requirements vary with serving utility. Typically,
utility company current transformers
require a 30 in. (762 mm) high compartment in SB1, SB2, SB3, and RCIII construction. Service sections meet most
utility metering standards.
4300, 4700 and 4720 Power Meters
The 4300 Power
Meter is provided as
a standard metering
option for SB1,
SB2, SB3, and RCIII
switchboards. Alternate metering options
for SB3 and RCIII
See Section 1
include the higher
accuracy 4700 Power Meter or analog
metering equipment if specified. The
4300, 4700 and 4720 Power Meters are
microprocessor-based, three-phase
meters that provide advanced features at
an affordable price. These meters are
designed as an alternative to full-featured
digital instrumentation packages, providing highly accurate, reliable, transient
surge and hipot-withstand capabilities.
Voltage and amperage measurements
are true RMS, including harmonics.
The 4300, 4700 and 4720 Power Meters
can be configured to operate in Wye
(Star), Delta, or single-phase voltage
modes. The meter is equipped to monitor
the measurements shown in Table 7.5.
The display module has a high visibility,
liquid crystal display (LCD). Functions buttons display measured data, including
volts, amperage, power function, all three
voltage and amperage phases.
Replacing analog meters and selector
switches, the two-module design simplifies wiring and reduces installation time.
This makes the Power Meter ideally
suited for economical metering on threephase industrial and commercial switchboards. A communications port allows
the power meter to be used as a standalone power monitoring station or as one
element in a large energy-management
network.
When used as part of a Siemens
ACCESS installation, the 4300, 4700 and
4720 Power Meters can communicate
with up to 128 ACCESS-compatible
devices. Using a direct PC connection or
a dial-up modem, the module interfaces
with Siemens SIEServe™ on-line software that monitors any ACCESS component on the electrical distribution system.
Ammeters and Voltmeters (Analog)
Ammeters are switchboard type with
±1% accuracy, 0 to 6000 amperes maximum. The included instrument switch
will provide positions to read each phase
and will include an OFF position. Panel
type ammeters with ±3% accuracy, 800
ampere maximum, can be furnished for
branch feeder metering to conserve
panel space.
Voltmeters are switchboard type with
±1% accuracy, 0 to 600 volts AC. The
included instrument switch provides positions to read each phase-to-phase voltage
and each phase-to-neutral voltage, and
has an OFF position.
Current Transformers / Potential
Transformers
Potential transformers are recommended
wherever the system voltage exceeds
150 volts AC phase-to-neutral to lower
voltage levels for instrument switches
and meters mounted on the switchboard
front panel.
4 digit indicator
4 digit
5 digit / 8 character
7
Sentron™
Switchboards
Customer Metering
A full compartment of switchboard instruments with appropriate current transformers, potential transformers and
selector switches are available in all
Siemens switchboards.
The meters and instrument switches are
mounted on hinged panels with potential
transformers and fuses behind the door.
Current transformers are mounted on the
main bus or, in the case of branch feeder
metering, at the load terminals of the
branch protective device and normally do
not require additional unit space.
General
Siemens 4300 and 4700 Power Meters
Table 7.6—Power Meter Features
Metering
Features
Phase currents
Avg. phase current
Ampere demand
Phase voltages
Avg. phase voltage
Line voltages
Avg. line voltage
kW
kVA
kVAR
kW demand
kW hours
kVAR hours
Power factor
Frequency Hz
Power Meter Accuracy
4300
± 0.5%
± 0.5%
N/A
± 0.5%
± 0.5%
± 0.5%
± 0.5%
± 1.0%
± 1.0%
± 1.0%
± 1.0%
± 1.0%
N/A
± 2.0%
0.2Hz
4700
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 1.0%
0.2Hz
4720
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.2%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 0.4%
± 1.0%
0.2Hz
Table 7.7 Available CT Ratios —
Ampere Rating
100:5
150:5
200:5
300:5
400:5
500:5
600:5
800:5
1000:5
1200:5
1500:5
2000:5
2500:5
3000:5
4000:5
5000:5
6000:5
Table 7.5—Number of CT's and or PT's required for Typical Meters Applied on Selected System Voltages
Watthour Meters
System
1Ø3W
3Ø3W
3Ø4W
Volts
120/240
240
480
120/240
120/208
277/480
CSI Section 16470
Ammeter
C/T
2
2
2
3
3
3
Voltometer
P/T
Scale
—
—
2
—
—
3
0-300
0-300
0-600
0-300
0-300
0-600
2 Element
C/T
P/T
2
2
2
—
—
—
—
—
2
—
—
—
2.5 Element
C/T
P/T
—
—
—
3
3
3
—
—
—
—
—
2
3 Element
C/T
P/T
—
—
—
—
3
3
—
—
—
—
—
3
Wattmeter
C/T
P/T
2
2
2
3
3
3
Siemens Electrical Products and Systems
Specification Guide
—
2
2
2
—
2
Varmeter
C/T
P/T
2
2
2
3
3
3
—
2
2
2
—
2
Power Fac- Frequency Synchrotory Meter Meter
scope
C/T
P/T
P/T
P/T
1
1
1
1
1
1
—
2
2
2
2
2
—
—
1
—
—
1
—
2
2
—
—
2
107
Sentron™ Switchboards
Modifications and Accessories
Motor Control
Table 7.8
NEMA Size
0, 1
2
3
4
FVNR
50 VA
100 VA
150 VA
250 VA
쐍 Standard Control Power
Transformers: 480 / 240 / 120 Volts AC
쐍 Pushbutton: Two-Unit Start-Stop,
Open-Close, Etc.
General
쐍 Selector Switch: 1-Pole, DoubleThrow (ON / OFF); 2-Pole, DoubleThrow (hand / off / auto)
쐍 Pilot Lights: Red or Amber (neon
type); Green (incandescent type,
includes auxiliary interlock);
Transformer and Push-to-Test type
Pilot Lights Available
쐍 Auxiliary Interlocks: Sizes 1–4
쐍 Control Relays (may increase mounting height)
Sentron™
Switchboards
7 Type RL Low Voltage Power Circuit Breakers
Static Trip® III Microprocessor-Based
Tripping
The Static Trip III trip
unit comes in four
models for maximum
flexibility. Table 7.9
shows the functions
of the various models.
(See pages 13, 56-57).
The parameters measured by the Static
Trip IIIC / CP trip units are shown in
Table 7.11. For protective relay functions, Table 7.10 shows how the Static
Trip IIICPX trip unit can be used. All
communicating Static Trip III trip units
include a local communication port that
supports the breaker mounted display
unit or BDU. The BDU features a high-
Table 7.9—Static Trip III Trip Unit Functions
Static Trip III Model
III
IIIC
Functions
Self-Powered Overcurrent Protection
RMS Sensing
Switchable Thermal Memory
Ground Fault Protection
LCD Target
Protective Microprocessor Watchdog
Pickup LEDs
Zone Interlocking 햲
Retrofit Universal Mounting Package
RS-485 Communications Port
Breaker Display Unit Port 햳
Communications Microprocessor Watchdog
Comm Watch LED
Backup Shadow Protection
Trip Log
Alarm Relay Output 햲
Trip Unit Status Indication
Breaker Position Indication
Breaker Operation Counter
Communication Open/Close/Trip 햲 햶
Event Log
Phase Current Metering
Ground Current Metering 햴
Neutral Current Metering 햵
Min/Max Current Log
Power Metering Functions
Min/Max Power Log
Extended Protective Relaying
Extended Trip Log
햲 Requires additional wiring to meet specific application.
햳 Supports optional Breaker Display Unit Accessory.
햴 Included when ground fault protection specified.
IIICP
IIICPX
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
opt.
opt.
opt.
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
opt.
opt.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
opt.
opt.
opt.
opt.
opt.
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
opt.
opt.
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
opt.
opt.
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
opt.
opt.
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
—
—
—
—
—
—
햵 Requires “N” option and neutral current sensor.
햶 Open command uses alarm relay output and restricts
use for other alarm functions. Close command requires
electrically operated breaker.
Table 7.10—Static Trip IIICPX Protective Relay Functions
Protective Function
Current Unbalance
Voltage Unbalance
Overvoltage
Undervoltage
Reverse Power
Overfrequency
Underfrequency
108
Setting Range
5–50%
5–50%
60–660V
60–660V
10–2000kW
50.0–70.0Hz
45.0–60.0Hz
Typical Applications
Motors
Generators
✓
✓
—
✓
—
—
—
✓
—
✓
✓
✓
✓
✓
Mains
—
✓
—
—
✓
—
—
Siemens Electrical Products and Systems
Specification Guide
쐍 Auxiliary Switch A or B Type for
Molded Case Breakers (not available
on Vacu-Break units)
Application Note: Mounting Height of
FVNR Motor Starter Increases by 2.5 in.
(64 mm) when Control Transformer is
Furnished
Master Control Power Transformers
require individual starter secondary disconnecting means (1996 NEC 430-74).
visibility alphanumeric display. Real-time
metered values, min / max values, event
log data and setpoint data can be read
on the BDU in straightforward engineering units. Alarm and relay setpoint can
be configured using the BDU keypad.
For complete information on Type RL
breakers, see pages 54–61.
Table 7.11—Static Trip III Trip Unit
Settings
T: Long Time
Setting 햲
(X Sensor Rating)
.5, .55, .6, .65, .7, .75,
.8, .85, .9, .95, 1.0
S: Short Time
Pickup
(X LT Setting)
2, 3, 4, 5,
6, 7, 8, 12
I: Instantaneous
Pickup
(X Sensor Rating)
2, 4, 6, 8,
12, 15
G: Ground Fault
Pickup
(% Ground Sensor)
20, 30, 40, 50, 60,
햲 Pickup
Delay
(Seconds @ 6X Setting)
3.5, 6, 10
17, 30
Delay
(Seconds)
.08, .15, .22
.30, 40
Delay
(Seconds)
No Intentional
Delay
Delay
(Seconds)
.10, .25, .40
is fixed at 1.1 times long time setting.
Table 7.12—Static Trip III Metering
Functions
Measured
Parameters
Phase Current
Avg. Phase Currents
Ground Current 햲
Neutral Current 햳
Phase Voltages 햴
Avg. Phase Voltage 햴
Line Voltages
Avg. Line Voltage
kW
kW Demand
kW Hours
kW Hours Reverse
kVA
kVAR
kVAR Hours
Power Factor
Frequency
Model
IIIC
IIICP
✓
✓
✓
✓
✓
✓
opt.
—
—
—
—
—
—
—
—
—
—
—
—
—
opt.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
햲 Included when ground fault protection specified.
햳 Requires “N” option and neutral current sensor.
햴 Only displayed for four wire systems.
CSI Section 16470
Sentron™ Switchboards
Modifications and Accessories
General
Table 7.13—Available Rating Plugs
SB Encased Systems Breakers
쐍
쐍
쐍
쐍
쐍
쐍
쐍
쐍
쐍
쐍
Shunt Trip
Auxiliary Switches, up to 6 N.O. / N.C.
Undervoltage Release
Electronic “Bell Alarm” Module
Electric Charging Motor Operator with
Electronic Controller
Integral Local Electric Close Option
Integral Kirk-Key Interlock on SB
Close Blocking Device
Trip Padlock Device
Position Padlock Device (Drawout)
Frame Ampere
Rating (In)
400
800
1200
1600
2000
2500
3200
4000
5000
쐍 Cell Switches, 4 N.O. / N.C. (Mounted
on Drawout Stationary Element)
쐍 Automatic Safety Shutters
쐍 Kirk-Key Provision (Mounted on
Drawout Stationary Element)
쐍 Mechanical Interlock
쐍 Capacitor Trip Device
쐍 Remote Indication / Relay Panel
쐍 Auxiliary Power Module (for benchtesting trip unit)
쐍 TS 31 Universal Test Set
Rating Plug Amperes (Ir)
200, 225, 250, 300, 350, 400
400, 450, 500, 600, 700, 800
600, 700, 800, 1000, 1200
800, 1000, 1200, 1600
1000, 1200, 1600, 2000
1600, 2000, 2500
1600, 2000, 2500, 3000, 3200
2000, 2500, 3000, 3200, 4000
2500, 3000, 3200, 4000, 5000
For additional SB breaker information,
see Section 16.
7
Table 7.14—SB Breaker Trip Unit Ratings (Ir = Rating Plug Value; In = Frame Ampere Rating)
Current Setting (x Current Rating P/US)
Delay 햲 (Sec.)
2.5, 5.5, 8, 10, 14, 17, 21, 25, 30
Short Time
(S)
Frame Amp Rating
800–2000A
2500–5000A
Pick up (xIr)
1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 9
1.5, 2, 2.5, 3, 4, 5, 6, 7, 8
Delay (I2t) out 햳
.07, .1, .15, .2, .3 seconds
Ground
Fault 햵
(G)
Current equal to 6 times Ir
Delay (I2t) in 햳
.07, .1, .15, .2, .3 seconds
Frame Amp Rating
800–2000A
Pick up (xIr)
25kA
Frame Amp Rating
800–1200A
2000A
3200A
4000–5000A
Fixed
25kA
35kA
50kA
65kA
Frame Amp Rating In
Available Setting (In)
400, 800, 1200
20, 25, 30, 40, 50, 60, 70, 80, 90, 100
1600
20, 26, 32, 38, 44, 50, 56, 62, 68, 75
2000
20, 23, 27, 30, 35, 40, 45, 50, 55, 60
2500
20, 23, 26, 29, 32, 35, 38, 41, 44, 48
3200
20, 21, 23, 25, 27, 29, 31, 33, 35, 37
4000
20, 21, 22, 23, 24, 25, 26, 27, 28, 30
5000
Setting fixed at 1200A
Delay (Fixed)
.1, .2, .3, .4, .5 seconds @ .5 = In
Delay (I2t)
.1, .2, .3, .4, .5 seconds @ .5 = In
햳
Current equal to 8 times Ir
Sentron™
Switchboards
Pickup
Adjustable
Instantaneous
Pick-up (I)
Instantaneous
Override 햴
햲
.5, .6, .65, .7, .75, .8, .85, .9, .95, 1.0
Long Time
(T)
2500–5000A
1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10
햴
.500 seconds maximum
햵 No
trip point setting exceeds 1200 amperes
1
22
23
18
19
21
SB Trip Unit
햲 Replaceable Rating Plugs Adjustable
From 50–100% of Frame Rating.
햳 Continuous Self-Diagnostic “Watchdog”
햴 Integral Test Functions for Phase and
Ground Fault (Trip and No-Trip Tests)
햵 External Power Source Allows Bench
Testing of Stand-Alone Trip Unit
햶 Plug-in Display Modules for Current and
Energy Display Capabilities
햷 Long Time Continuous Current Setting
햸 Long Time Delay Band Setting
CSI Section 16470
햹
햺
햻
햽
햾
햿
헀
헁
헂
Static Trip III Trip Unit
Short TIme Pickup Setting
Short Time Delay Band Setting
Instantaneous Pickup Setting
Integral LED Trip Indicators
Full Communications Capability Via
Siemens ACCESS Network
LCD Target
Thermal Memory Switch
Short Time I2t Ramp Switch
Zone Interlock Switch
Siemens Electrical Products and Systems
Specification Guide
20
SB-EC Trip Unit
헃 Zone Interlocking Input / Output and
Future Options
헄 LCD Display
헅 Key Pad
헆 Test Connector
21 Serial Port
22 System Check Leds
23 System Status Leds
109
Sentron™ Switchboards
Modifications and Accessories
Molded Case Circuit Breakers
Sentron™
Switchboards
7
쐍 Alarm Switch for remote indication
and / or pilot device operation when
breaker is tripped automatically.
쐍 Shunt Trip (electric open-manual
close) for remote tripping of breaker.
Includes cut-off switch. Specify control voltage.
쐍 Undervoltage Trip automatically trips
breaker when voltage is reduced
35%–70% of coil rating. Specify
Control Voltage.
쐍 Auxiliary Switch 1A and 1B, 2A and
2B, etc.
쐍 Telemand Motor Operator (electric
open and close). Operating Voltage
48V DC; 120, 240V AC.
쐍 Ground Fault Relay (requires shunt
trip).
Vacu-Break® Fusible
Switches
All Vacu-Break fusible switches include:
쐍 Voidable Cover Interlock
쐍 Quick-Make, Quick-Break Operation
쐍 Positive ON / OFF Action
쐍 Padlockable Handle Design (at ON or
OFF)
쐍 Vacu-Break Arc Control (i.e., enclosed
arc chamber, double-break magnetic
arc blowout)
쐍 Clampmatic Pressure Spring Force
On Closed Contacts
쐍 Spring-Reinforced Fuse Holders
For 250V switches (30 to 600A):
쐍 Class R Rejection Type Fuse Holders
for all units except the 2.5 in. (64
mm) high unit, which is suitable only
for NEC Class H, K1 and K5 fuses.
For 600V switches (30 to 600A):
쐍 Class R Rejection Type Fuse Holders
or Class J Fuse Holders.
Bolted Pressure Switches
These switches are suitable for use on
systems capable of delivering fault current up to 200,000 amperes symmetrical RMS when equipped with Class L
fuses. All bolted pressure switches
include:
쐍 Fuse Door Interlock
쐍 Quick-Make, Quick-Break Operation
쐍 Bolted Pressure Force on Operation
쐍 Bolted Pressure Force on Closed
Contact
쐍 Padlockable Handle (in the “open”
position only)
110
General
Sensitrip® Breaker Adjustment Range Overview
Table 7.15
Maximum Continuous
Current Range
Maximum
Ampere
Rating
600
1200
1600
Breaker
Frame
SJD, SLD
SMD, SND
SPD
Table 7.16
Long-Time Delay
Short-Time
Pickup
Short-Time
Delay
Instantaneous
Pickup
Ground Fault
Delay
Ground Fault Range
Percentage
of Max.
Time in
Cont. Amps Seconds
20-70%
0.10-0.40
20-70%
0.10-0.40
20-70%
0.10-0.40
More
Details on
Page
329330
Breaker Functions (In = Nominal Rating of Circuit Breaker)
Function
Continuous
Ampere (Ir)
Ground Fault
Pickup
Available
Amperage Percentage Maximum
Range
of Max.
Range
200-600
20-100%
40-600
600-1200
20-100%
120-1200
1200-1600
20-100%
240-1600
Performance
Varies the level of current the circuit breaker will carry without tripping.
Completely adjustable from 20 to 100% of breaker's continuous ampere
rating. (Ir = % of In)
Referred to as the “overload” position, this function controls the breaker's
“pause-in-tripping” time to allow low level, temporary inrush currents such
as those encountered when starting a motor to pass without tripping.
Adjustable settings from 3 or 25 seconds at 6 x Ir are possible.
Controls the amount of high current the breaker will remain closed against
for short periods of time, allowing better coordination. Adjustable between
1.5 to 10 times the continuous ampere setting of the circuit breaker (i.e.,
adjustable from 1.5 to 10 times Ir).
Controls the amount of time (from .05 to .2 seconds in fixed time, or .2
seconds at 6 x lr in the l2t ramp mode) a breaker will remain closed against
high fault current. This function is used in concert with the Short-Time
Pickup function to achieve selectivity and coordination. (A pre-determined
override automatically preempts the setting at 10.5 times the maximum
continuous ampere setting In.)
Determines the level at which the circuit breaker trips without an
intentional time delay. The instantaneous pickup function is adjustable
from 2 to 40 times the continuous ampere setting (lr) of the breaker.
(Anytime an overlap exists between the instantaneous and short-time
pickup settings the instantaneous automatically takes precedence.)
Controls level of ground fault current which will cause circuit interruption
to ocurr. Complies with National Electric Code, Article 230, Section 95(a)
for maximum trip point settings. Adjustable from 20 to 70 percent of the
breaker's maximum continuous ampere setting (In).
Adds a predetermined time delay to the trip point once ground fault pickup
level is reached. Inverse l2t ramp is standard which provides better tripping
selectivity between the main and feeder or other downstream breakers.
Accessories and modifications:
쐍 Shunt Trip (electrical open-manual
close)
쐍 120V AC Standard Control Voltage
쐍 Electrical Operator (electrical open
specify system voltage)
쐍 Ground Fault Relay (requires shunt
trip)
쐍 Blown Fuse Trip (switch opens when
any one fuse blows — requires shunt
trip)
쐍 Blown Fuse Indicating Lights
쐍 Phase Failure Relay with Capacitor
Trip (detects failure of any one phase
and opens switch — requires shunt
trip, specify system voltage)
쐍 Auxiliary Contacts
Siemens Electrical Products and Systems
Specification Guide
HCP Fusible Switches
Rated 200,000 amperes RMS symmetrical when equipped with Class L fuses.
Standard features include:
쐍 High Contact Silver Alloy Contacts
쐍 Heavy Duty Quick-Make, Quick-Break
Accessories include:
쐍 Undervoltage Release —
Instantaneous
쐍 Remote Spring Release Closing
쐍 Remote Trip Signaling
쐍 Bell Alarm with Lockout
쐍 Shunt Trip with Standard Control
Voltages of 120, 240, 480V AC;
12, 24, 48 and 125V DC.
CSI Section 16470
Sentron™ Switchboards
Interrupting Ratings of Disconnect Devices
Molded Case Circuit
Breakers
Normal and Heavy Duty
Normal duty breakers are designed for
commercial, industrial, institutional and
other heavy duty applications and rated
to 600 volts AC; 250 volts DC. Heavy
Duty breakers have higher interrupting
ratings than normal duty.
Extra Heavy Duty
These are designed for heavy duty applications where the interrupting requirements exceed the ratings of heavy duty
breakers. They are rated up to 600 volts
AC and 250 volts DC.
Solid State Trip
Equipped with solid state tripping, and
available in heavy duty and extra heavy
duty interrupting ratings at 600V AC.
Type JD / LD Extra Heavy Duty
Solid-State Trip
Current-Limiting
These breakers incorporate the exclusive
Siemens blow-apart interruption principle
and meet the NEC requirements for current-limiting breakers. Current-limiting
circuit breakers can limit the let-through
l2t to a value less than the l2t of onehalf cycle wave of the symmetrical
prospective current without any fusible
elements when operating within their
current-limiting range.
햲
햳
All breakers are 2-pole for DC rating.
Extra heavy duty breakers are inherently fungus-proof
an do not require special fungus treatment.
CSI Section 16470
Interrupting Ratings of Molded Case Circuit Breakers
Maximum Available
Ampere
Amperage
Breaker
Rating
Range
Type
Normal Duty — Thermal-Magnetic
BQH
100
15-100
BLH
BQD
125
15-125
BL
225
60-225
QJ2
400
200-400
JXD2
Heavy Duty — Thermal-Magnetic
100
15-100
ED2
ED4
125
15-125
ED6
225
60-225
QJH2
250
70-250
FXD6/FD6
400
200-400
JXD6/JD6
600
250-600
LXD6/LD6
LMXD6/LMD6/
800
500-800
MXD6/MD6
1200
800-1200
NXD6/ND6
1600
1200-1600
PXD6/PD6
2000
1600-2000
RXD6/RD6
Heavy Duty — Solid-State Trip
400
200-400
SJD6
600
200-400
SLD6
800
200-400
SMD6
800-1200
1200
SND6
1600
200-400
SPD6
3200
2000-3200
STD6
Extra Heavy Duty — Thermal-Magnetic 햳
100
15-100
HBL
15-125
HED4
15-125
HHED6
125
60-225
QJ2-H
70-250
HFD6
250
70-250
HHFD6
200-400
HJD6/HJXD6
400
200-400
HHJD6/HHJXD6
200-600
HLD6/HLXD6
600
400-600
HHLD6/HHLXD6
500-800
HLMD6/HLMXD6
800
500-800
HMD6/HMXD6
1200
800-1200
HND6/HNXD6
1600
1200-1600
HPD6/HPXD6
2000
1600-2000
HRD6/HRXD6
Extra Heavy Duty — Solid-State Trip
400
600
800
1200
1600
40-400
60-600
120-800
160-1200
240-1600
SHJD6
SHLD6
SHMD6
SHND6
SHPD6
SHTD6
3200
2000-3200
SHHTD6
Current-Limiting — Thermal-Magnetic
125
15-125
CED6
250
70-250
CFD6
400
200-400
CJD6
600
400-600
CLD6
800
500-800
CMD6
1200
800-1200
CND6
1600
1200-1600
CPD6
Current-Limiting — Solid-State Trip
400
40-400
SCJD6
600
60-600
SCLD6
800
120-800
SCMD6
1200
160-1200
SCND6
Siemens Electrical Products and Systems
Specification Guide
Maximum Interrupting Capacity
Symmetrical RMS Amperes VAC
240V
480V
600V
In DC Amperes (VDC)
250V 햲
500V 햲
22,000
—
—
—
—
—
14,000
—
—
—
10,000
—
—
—
—
65,000
—
—
30,000
—
10,000
—
18,000
25,000
—
—
—
18,000
—
22,000
5,000
—
—
18,000
—
18,000
65,000
22,000
30,000
—
7
35,000
30,000
65,000
25,000
25,000
50,000
35,000
25,000
65,000
50,000
85,000
65,000
50,000
65,000
42,000
100,000
200,000
100,000
200,000
100,000
200,000
—
42,000
65,000
—
65,000
100,000
65,000
100,000
65,000
100,000
—
—
25,000
—
25,000
25,000
35,000
50,000
35,000
50,000
25,000
100,000
65,000
100,000
50,000
—
—
—
30,000
—
—
30,000
—
30,000
—
30,000
—
—
—
—
—
25,000
—
25,000
—
35,000
—
30,000
50,000
—
—
30,000
50,000
—
—
35,000
100,000
65,000
50,000
65,000
100,000
100,000
200,000
100,000
150,000
200,000
200,000
150,000
150,000
100,000
100,000
65,000
150,000
100,000
100,000
65,000
100,000
200,000
111
Sentron™
Switchboards
Type FD6, FXD6 Heavy Duty
Thermal-Magnetic Breaker
Table 7.17
Technical
Sentron™ Switchboards
Interrupting Ratings of Disconnect Devices
Table 7.18
Sentron™
Switchboards
7
Frame
Breaker
Size
Amperes Type
RL-800
RLE-800
800
RLI-800
RL-1600
1600
RL-2000
2000
RLE-2000
3200
RLE-3200
RL-4000
4000
RLE-4000
RL-5000
5000
RL-800
RLE-800
800
RLI-800
RL-1600
1600
RL-2000
2000
RLE-2000
3200
RLE-3200
RL-4000
4000
RLE-4000
RL-5000
5000
RL-800
RLE-800
800
RLI-800
RL-1600
1600
RL-2000
2000
RLE-2000
3200
RLE-3200
RL-4000
4000
RLE-4000
RL-5000
5000
Table 7.19
Insulation
Level
Dielectric
Rated
WithRated
Max.
stand
Voltage Voltage Volts
600
480
240
and
208
635
508
254
2200
2200
2200
3200
4000
5000
112
Short Time
Rating
Symmetrical
Amperes
30,000
42,000
22,000
50,000
65,000
85,000
65,000
85,000
100,000
85,000
30,000
42,000
22,000
50,000
65,000
85,000
65,000
85,000
100,000
85,000
30,000
42,000
22,000
50,000
65,000
85,000
65,000
85,000
100,000
85,000
Short Circuit Rating
Symmetrical Current
With
Without
InstantInstantaneous
aneous
Trip
Trip
Amperes
Amperes
30,000
30,000
65,000
42,000
42,000
22,000
65,000
50,000
65,000
65,000
85,000
85,000
85,000
65,000
100,000
85,000
100,000
100,000
100,000
85,000
30,000
30,000
65,000
42,000
100,000
22,000
65,000
50,000
65,000
65,000
100,000
85,000
85,000
65,000
100,000
85,000
100,000
100,000
100,000
85,000
42,000
30,000
65,000
42,000
100,000
22,000
65,000
50,000
65,000
65,000
100,000
85,000
85,000
65,000
130,000
85,000
130,000
100,000
130,000
85,000
Continuous
Current
Rating
Amperes
75-800
75-800
75-800
75-1600
75-2000
75-2000
600-3200
800-4000햲
800-4000햲
2500-5000
75-800
75-800
75-800
75-1600
75-2000
75-2000
600-3200
800-4000햲
800-4000햲
2500-5000
75-800
75-800
75-800
75-1600
75-2000
75-2000
600-3200
800-4000햲
800-4000햲
2500-5000
Type RLF Fused Low Voltage Power Circuit Breakers 햳
Voltage Rating
Frame
Size
Amperes
800
1600
2000
Table 7.20 Vacu-Break® Fusible
Switches 햴
Type RL Low Voltage Power Circuit Breakers 햳
Voltage Rating
Type
RLF-800
RLF-1600
RLF-2000
RLF-3200 &
RFC-3200
Fuse Carriage
RLF-4000 &
RFC-4000
Fuse Carriage
RLF-5000 &
RFC-5000
Fuse Carriage
Rated
Volts
208
to
600
Rated
Max.
Volts
Insulation
Level
Dielectric
Withstand
Volts
Short
Circuit
Ratings
Symmetrical
Amps
2200
200,000
2200
Technical
Max.
Ampere
Rating
30
to
600
800
1200
Ampere
Rating
800
1200
1600
2000
2500
3000
4000
5000햶
10,000
RK1, RK5
200,000
J
200,000
L
100,000 햵
—
Class L
Fuse Rating
(Amperes)
601, 700, 800
1000, 1200
1500, 1600
1800, 2000
2500
3000
3500, 4000
5000
Table 7.22
Fuse Interrupting
Rating
(Sym. RMS Amps)
200,000
HCP Fusible Switches
Fuse Class
(Amperes)
Ampere
Rating
L
J
T햷
—
—
400
400
—
—
600
600
600,
601,
—
800
800
800
Continuous
Current
Rating
Amperes
75- 800
75-1600
75-2000
200,000
2000- 5000
600- 3200
800-4000*햲
햴
2200
200,000
4000- 6000
800- 3200
햵
2200
200,000
6000
2500- 5000
햶
햷
Siemens Electrical Products and Systems
Specification Guide
H, K1, K5
Fuse
Holder
NEC
Standard
Class R
Rejection
Type
Rejection
Type
Table 7.21 Bolted Pressure
Switches. All 600V AC Maximum
2 or 3 Poles
Range
Of Fuse
Ratings
Amperes
250-1600
800-3000
4000
600
Fuse
Class
Maximum
Interrupting
Capacity In
Symmetrical
RMS
Amperes,
240 to 600V
AC
1200
햲
햳
—
1000,
1200
Fuse Interrupting
Rating
(Sym. RMS Amps)
200,000
1000,
1200
With the addition of fan cooling and 5000A copper
main bus, a 4200A continuous rating is available.
For complete details on Siemens RL Power Breakers,
see pages 54 to 62.
All circuit breakers (and drawout fuses and carriage,
if applicable) are UL listed.
For further information on Vacu-Breaker switches,
see pages 355 to 370.
200,000A max. on 800A switch with “L” or “T” fuses
and 1200A switch at 240V with “L” fuses.
5000A bolted pressure switch not UL listed.
For use at 240V maximum system.
CSI Section 16470
Sentron™ Switchboards
Interrupting Ratings of Disconnect Devices
Table 7.23
햲 For
Type SB Encased Systems Breakers햲
Available
Amperage
Range
200 – 400
400 – 800
600 –1200
800 –1600
1000 – 2000
200 – 400
400 – 800
600 –1200
800 –1600
1000 – 2000
1600 – 2500
1600 – 3200
2000 – 4000
2500 – 5000
400 – 800
600 –1200
800 –1600
1000 – 2000
1600 – 2500
1600 – 3200
2000 – 4000
2500 – 5000
Breaker
Type
Maximum Interrupting Capacity
In Symmetrical RMS Amperes
For Voltage AC
240V
480V
600V
Short Time
Ratings In
Symmetrical
RMS Amperes
(30 Cycles)
25,000
SBA
65,000
65,000
42,000
35,000
50,000
25,000
65,000
SBS
100,000
35,000
100,000
85,000
7
65,000
25,000
SBH
200,000
150,000
100,000
Sentron™
Switchboards
Maximum
Ampere
Rating
400
800
1200
1600
2000
400
800
1200
1600
2000
2500
3200
4000
5000
800
1200
1600
2000
2500
3200
4000
5000
Technical
35,000
50,000
65,000
complete details on Siemens SB Encased Systems Breakers, see pages 313 to 325.
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
113
Sentron™ Switchboards
Pressure Wire Connectors
Table 7.24
Breaker
Type
Technical
Pressure Wire Connectors
Connector
Applied to
Amperage
Range
Cables
per
Connector
Table 7.24
Connector 햲
Wire Ranges
Available
#14 - #6 AWG Cu
#12 - #8 AWG Al
#8 - #6 AWG Cu
1
35 – 50
#8 - #4 AWG Al
#8 - #4 AWG Cu
1
55 – 70
#8 - #2 AWG Al
#4 - #1/0 AWG Cu
1
80 – 100
#2 - #1/0 AWG Al
#2 - #1/0 AWG Cu
BL
1
110 – 125
#1/0 - #2/0 AWG Al
#6 AWG - 250 kcmil Cu햳
QJ2
QJH2
1 pc.
60 – 225
#6 AWG - 300 kcmil Cu
QJ2-H
#4 AWG - 300 kcmil Al
#6 AWG - 300 kcmil Cu
JXD2
1 pc.
200 – 400
#4 AWG - 300 kcmil Al
Heavy/Extra Heavy Duty, Current-Limiting — Thermal-Magnetic
#14 - #10 AWG Cu
ED2
1 pc.
15 – 20
ED4
#12 - #10 AWG Al
ED6
1 pc.
25
#10 AWG Cu. or Al
HED4
HHED6
30 – 60 햴
1 pc.
#10 - #4 Cu. or Al
CED6
1 Pole, CED6
1 pc.
30 –100
#10- #1/0 AWG Cu. or Al
Sentron™
Switchboards
7
15 – 30
30–60 햴
1 Pole, CED6
FXD6/FD6
HFD6, CFD6
HHFD6
JXD6/JD6
HJD6/HJXD6
HHJD6/HHJXD6
CJD6
LXD6/LD6
HLD6/HLXD6
HHLD6
CLD6
1
1 pc.
#4- #1/0 Cu. or Al
1 pc.
#3/0 - 3 Cu
#2/0- 1 Al
30 –125
2 – 3 Pole
1 pc.
#10 - #3/0 Cu. Only
70 – 250
1 pc.
#6 AWG - 250 kcmil Cu
#6 AWG - 350 kcmil Cu 햳
#4 AWG - 350 kcmil Al
110 –125
200 – 400
1-2 pcs.
250 – 600
1-2 pcs.
MXD6/MD6
NXD6/ND6
HND6/HNXD6
CMD6, CND6
LMD6, LMXD6
HLMXD6
500 – 600
1-2 pcs.
1-2 pcs.
700 – 800
1-3 pcs.
800 –1200
1-3 pcs.
1-4 pcs.
PXD6/PD6
HPD6/HPXD6
CPD6
PXD6/PD6
HPD6/HPXD6
RXD6/RD6
HRD6/HRXD6
114
3/0 - 500 kcmil Cu
4/0 - 500 kcmil Al
1 pc.
1200 –1600
1-5 pcs.
Connector
Applied to
Amperage
Range
Connector 햲
Wire Ranges
Available
Heavy / Extra Heavy Duty, Current-Limiting — Solid-State Trip
3/0 - 500 kcmil Cu
SJD6, SHJD6
200–400 햶
1-2 pcs.
SCJD6
4/0 - 500 kcmil Al
3/0 - 500 kcmil Cu
SLD6, SHLD6
햶
1-2
pcs.
250–600
SCLD6
4/0 - 500 kcmil Al
#1 AWG - 500 kcmil
SMD6, SHMD6
1-2 pcs.
500–600
Cu or Al
SCMD6
SND6, SHND6
#1/0 AWG - 500 kcmil
1-3 pcs.
700–800
SCND6
Cu or Al
Breaker
Type
Normal Duty — Thermal-Magnetic
BQH
BLH
HBL
BQD
Pressure Wire Connectors (cont’d)
3/0 – 600 kcmil Cu 햳
500 – 600 kcmil Cu 햳
500 – 750 kcmil Al 햳
3/0 - 500 kcmil Cu 햳
4/0 - 500 kcmil Al
#1 AWG - 500 kcmil
Cu or Al
Cu 햳
600 – 750 kcmil
600 – 750 kcmil Al 햳
#1 AWG- 350 kcmil 햳
#1/0 AWG-500 kcmil
Cu or Al
250 – 400 kcmil Cu 햳
500 – 750 kcmil Cu 햳
250 – 400 kcmil Al 햳
500 – 750 kcmil Al 햳
250 – 500 kcmil Cu or Al
750 kcmil Al 햳 햵
300 – 600 kcmil Cu or Al
1-4 pcs.
300 – 600 kcmil Cu or Al 햳
1-6 pcs.
300 – 600 kcmil Cu or Al
1600 – 2000
800–1200
SPD6 / SHPD6
1200–1600
2000
3200
STD6 / SHTD6 /
SHHTD6
Cables
per
Connector
1-4 pcs.
1-5 pcs.
1-4 pcs. 햵
1-6 pcs.
1-4 pcs.
250 – 500 kcmil Cu or Al
300 – 600 kcmil Cu or Al
750 kcmil Cu or Al 햳
250 – 600 kcmil Cu or Al
4/0 - 750 kcmil Al or Cu 햷
Table 7.25 Vacu-Break Fusible Switches
(Branch Connectors)
Ampere
Rating
30 (2.5 in.)
(64 mm)
30
60
100
200
400
600
800
1200
Cables per
Connector
Wire
Range
Type
1
#14 - #8 AWG
Cu
1
1
1
1
2
2
3
4
#14 - #4 AWG
#14 - #4 AWG
#1/0 AWG
#6 AWG - 350 kcmil
#4/0 AWG - 500 kcmil
#4/0 AWG - 500 kcmil
#4/0 AWG - 500 kcmil
#4/0 AWG - 500 kcmil
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Table 7.26 HCP Fusible Switches
(Branch Connectors)
Ampere
Rating
400 – 600
400 – 600
400 – 800
400 – 800
800 – 1200
800 – 1200
Cables per
Connector
2
2
3
3
4
3
Wire
Range
#1 AWG-500 kcmil
#1 AWG-500 kcmil
#1 AWG-500 kcmil
#1 AWG-350 kcmil
#1 AWG-500 kcmil
#250-500 kcmil
Type
Cu or Al
Cu only
Cu or Al
Cu only
Cu or Al
Cu only
Table 7.27 Fusible Bolted Pressure Switches 햷
(Branch Connectors)
Ampere
Rating
800
1200
1600
2000
Table 7.28
NEMA Size
00-1
2
3
Cables per
Connector
2
4
6
6
Wire
Range
#4/0 AWG - 750 kcmil
#4/0 AWG - 750 kcmil
#4/0 AWG - 750 kcmil
#4/0 AWG - 750 kcmil
Type
Cu or Al
Cu or Al
Cu or Al
Cu or Al
Starters and Contactors (Lug Data)
Lugs per Pole
1
1
1
Wire Range
#14 - #8 AWG
#14 - #4 AWG
#14 - #1/0 AWG
Type
Cu Only
Cu Only
Cu/Al
햲
햳
햴
햵
햶
Terminals are UL listed for 60/75°C conductors; CSA listed for copper wire only.
Optional — use only in cases allowed by local codes.
Use on load side only.
This connector is of aluminum construction, but rated for copper cable only.
200A — Apply this connector when continuous current setting is adjusted for lower
ampacities.
햷 Not available with breaker or switch. Requires bussing to install.
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Standard C.T. Compartments
Dimensions
Service entrance switchboards often
require that a utility current transformer
compartment be included. The National
Electrical Manufacturer’s Association
(NEMA) has created a section covering
utility C.T. compartments for inclusion in
PB-2, the existing standard for switchboards.
Siemens C.T. compartments have been
designed to conform to this standard.
All specific utility requirements take
precedence but in the absence of any
special requirements, the standard will
be used.
Figure 1
Figure 2
EUSERC Member Utilities
For all cases where incoming service is
from below, underground pull sections
are required.
For EUSERC member utilities, underground pull sections require nonbussed
sections for 400 ampere, lug landings
for 600 and 800 ampere and bussed
pull sections above 800 ampere.
Figure 3
Table 7.29
Other Utilities
For all other utilities, non-bussed or
bussed pull sections are required per
local utility and code requirements.
Figure 4
NEMA Standard Only
Compartment
Bus
Dimensions In Inches (mm) Drilling
Fig. H
W
D
Figure
30
38
20
1
3
400–800
(762)
(965)
(508)
30
38
28
3
2
400–800
(762)
(965)
(711)
30
38
28
4
2
1200–2000
(762)
(965)
(711)
30
38
38
2
4
1200–2000
(762)
(965)
(965)
30
38
38
2
4
2500
(762)
(965)
(965)
30
38
38
2
4
3000–4000
(762)
(965)
(965)
Ampere
Rating
CSI Section 16470
Dimensions In Inches (mm)
A
B
C
F
9.00
6.44
7.50
10.00
(229)
(164)
(191)
(254)
10.00
9.00
10.88
7.50
(254)
(229)
(276)
(191)
7.50
11.50
6.02
9.00
(191)
(292)
(153)
(229)
7.50
11.50
6.82
9.00
(191)
(292)
(173)
(229)
7.50
11.50
7.07
9.00
(191)
(292)
(180)
(229)
7.50
11.50
7.07
9.00
(191)
(292)
(180)
(229)
G
10.50
(267)
17.50
(445)
17.50
(445)
19.00
(483)
19.00
(483)
19.00
(483)
Siemens Electrical Products and Systems
Specification Guide
Notes:
The utility C.T. compartments may be in the
upper or lower portion of the Service Section.
Neutral may be located to the rear alongside ØA
or ØC; — alternate rear location between ØA
and ØB, or ØB and ØC.
All dimensions are shown in inches and mm.
The neutral need not be located in the C.T. compartment, provided its location complies with
1993 NEC. article 300-20, and with UL as they
relate to induced currents.
Quantity and size of aluminum and copper bus
per UL 891, or manufacturers’ UL Listed sizes,
based on temperature rise.
Barrier material and thickness per UL 891.
This standard is intended for C.T.’s built to ANSI
C12.11-1978.
115
7
Sentron™
Switchboards
PB-2 5.06 Utility Transformer
Compartment
Switchboard assemblies containing current transformer compartments for utility metering shall be arranged as shown
in Figures 1 through 4. All indicated
dimensions are minimum except the
mounting for the current transformer.
Mounting shall be for either bar or window type transformers.
The front of the compartment shall be
accessible through a sealable hinged,
single or double door or removable
cover.
Barriers shall be installed as required to
prevent access through other than sealable doors or covers.
Sentron™ Switchboards
Utility Metering — Types SB1, SB2, and SB3
Table 7.30
Sentron™
Switchboards
7
General
Utility Reference
240V
480V
Electric Utility Company
Utility
Code
Hot
SB1
SB2
Alameda City of Bureau of Electricity
EUSERC
X
X
X
X
X
Anaheim City of Public Utilities Department
EUSERC
X
X
X
X
X
Anderson Municipal, IN
AM
X
X
Anoka Electric Co., MN
AN
X
X
Appalachian Power Co., VA (NEMA)
AP
X
X
X
X
X
Arizona Public Service Company
EUSERC
X
X
X
X
X
Atlantic Electric, NJ
AE
X
X
X
X
X
Austin Electric Dept., TX
AU
X
X
Azusa City of Light and Water Department
EUSERC
X
X
X
X
X
Baltimore Gas & Electric, MD
BG
X
X
X
X
X
Bangor Hydro-Electric Co., ME
BH
Banning City of Electric Department
EUSERC
X
X
X
Cold
X
X
Hot
Cold
X
X
X
X
X
X
X
SB3
Belmont Municipal, MA
BM
Benton County Public Utility District No. 1
EUSERC
X
X
X
X
X
X
Benton Rural Electric Association
EUSERC
X
X
X
X
X
Blackstone Valley Elect. Co., RI
BV
X
X
Boston Edison Co., MA
BE
X
X
Braintree Elect., Light Co., MA
BL
X
X
Burbank City of Public Service Department
EUSERC
X
X
Burlington Elect., Lighting Dept., VT
BD
X
X
Callum County Public Utility District
CP
X
X
Cambridge Electric Co., MA
CA
Central Colorado Pwr./Centel Corp., CO
CX
X
X
Central Hudson Gas & Electric, NY
CH
X
X
Central Illinois Light Co., IL
CT
X
X
Central Illinois Public Service, IL
CV
X
X
Central Maine Power Co., ME
CM
X
X
Central Vermont Public Service Corp., VT
CR
Chelan County Public Utility District
EUSERC
Chicopee Light & Power, MA
CL
Cincinnati Gas & Electric, OH
CG
X
Citizens Utility Company Kauat Electric Division
EUSERC
City of Colorado Springs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
City of Dover, DE
CD
City of Vineland, NJ
CI
Clark County Public Utility District
EUSERC
Cleveland Electric Illuminating Co., OH
CC
Colorado Springs Dept. of Utilities, CO
EUSERC
Columbus Div. of Electric, OH
CY
X
X
Columbus Southern Power, OH
CU
X
X
Commonwealth Edison Co., IL
CE
Commonwealth Electric, MA
CW
X
Concord Electric Co., NH
CO
X
Connecticut Light & Power Co., CT
CN
Consolidated Edison Co., NY (298-377)
CS
Consumers Power of Michigan, MI
CF
Coos-Curry Electric Cooperative
EUSERC
X
X
X
X
X
CP National Corporation
EUSERC
X
X
X
X
X
Cornbelt Electric Co-Op., IL
CB
X
X
Danvers Elect., Div., MA
DC
Dayton Power & Light Co., OH
DP
X
X
X
Delaware Power & Light Co., DE
DL
X
X
X
Delmarva Power & Light, DE
DM
X
X
X
X
X
X
X
Des Moines District
Detroit Edison Co., MI
116
DE
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Siemens Electrical Products and Systems
Specification Guide
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CSI Section 16470
Sentron™ Switchboards
Utility Metering — Types SB1, SB2, and SB3
Table 7.30
General
Utility Reference (cont’d)
240V
480V
Electric Utility Company
Utility
Code
Hot
Duquesne Light Co., PA
DU
X
X
X
East Central Electric, MN
EC
X
X
X
Eastern Edison Co., MA
EE
X
X
X
X
EH
X
X
X
X
EUSERC
X
X
Eugene Water and Electric Board
Exeter & Hampton Electric Co., NH
Florida Power and Light (NEMA)
Franklin County Public Utility District
Cold
Hot
Cold
SB1
SB2
SB3
X
X
X
X
X
X
X
X
X
FE
X
X
Georgia Power Co., GA (NEMA)
GP
X
X
X
X
X
Glendale City of Public Service Department
EUSERC
X
X
X
X
X
Granite State, NH (NEMA)
GS
X
X
X
X
Grant County Public Utilities District
EUSERC
X
X
X
X
X
Gray’s Harbor County District No. 1
EUSERC
X
X
X
X
X
Green Mountain Power Co., VT (NEMA)
GM
X
X
X
X
Greenport Electric Dept., NY
GL
X
X
Gulf State Utilities Co., TX
GE
X
X
X
X
X
X
X
X
Hancock Co., Rural Electric Corp., IA
HC
X
X
Hawaii Electric Company
EUSERC
X
X
X
X
X
Hawaii Electric Light Company
EUSERC
X
X
X
X
X
Heraldsburg
EUSERC
X
X
X
X
X
Idaho Power
EUSERC
X
X
X
X
X
Idaho Power Company
EUSERC
X
X
X
X
X
Illinois Power Co., IL
IC
X
X
X
X
X
Imperial Irrigation District
EUSERC
X
X
X
X
X
Indiana & Michigan Electric Co., IN
IM
X
X
Indianapolis Power & Light, IN
IP
X
X
X
X
Interstate Power Co., IA
IN
X
X
Iowa Illinois Gas & Electric, IA
IL
X
X
Iowa Public Service, IA
IS
X
X
X
X
Hampton Power and Light (NEMA)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
IU
Jacksonville Electric Authority, FL (NEMA)
JE
Jersey Central Power & Light, NJ
JC
Kansas City Power & Light Co., MO
KC
X
Kansas Gas & Electric Co., KS
KG
X
X
X
Kansas Power & Light, KS
KL
X
X
X
Kentucky Power, KY (NEMA)
KP
X
X
X
Kentucky Utilities, KY (NEMA)
KU
X
X
Klickitat Company Public Utility District
EUSERC
X
X
Lake Superior District Power Co., MN
LS
X
X
Lassen Municipal Utility District
EUSERC
X
X
Laverne Municipal Electric Plant, OK
LM
X
X
Lincoln Electric System, NE
LC
X
X
Lodi
EUSERC
X
X
X
X
Lompoc
EUSERC
X
X
X
X
Long Island Lighting Co., NY
LI
X
X
Los Angeles Department of Water and Power
EUSERC
X
X
X
X
X
Louisville Gas & Electric Co., KY
LG
X
X
X
X
X
Lubec Water & Electric District, ME
LL
Madison Gas & Electric Co., WI
MG
Maine Public Service Co., ME
MP
Mason County Public Utility District
EUSERC
Massachusetts Electric Co., MA (NEMA)
MC
Maui Electric Company
EUSERC
X
McMinnvile Water and Light
EUSERC
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Siemens Electrical Products and Systems
Specification Guide
7
X
Iowa Southern Utilities Co., IA
CSI Section 16470
X
X
Sentron™
Switchboards
Freeport Electric Dept., NY
117
Sentron™ Switchboards
Utility Metering — Types SB1, SB2, and SB3
Table 7.30
Utility Reference (cont’d)
Sentron™
Switchboards
240V
480V
Electric Utility Company
Utility
Code
Hot
SB1
SB2
Messa
EUSERC
X
X
X
X
X
Metropolitan Edison Co., PA
ME
X
X
X
X
X
X
X
X
X
X
Midwest Power Co., IA
MI
X
X
X
Minnesota Power & Light Co., MN
ML
X
X
X
Mississippi Power & Light, MS
MS
X
X
Modesto Irrigation Distict
EUSERC
X
X
MidAmerica Energy
7
General
Cold
Hot
Cold
SB3
X
X
X
X
Monongahela Power Co., WV
MO
X
X
X
Montana Dakota Utilities, MT/ND/SD
MD
X
X
X
Montana Power and Light
EUSERC
X
X
X
X
X
Montana Power Company
EUSERC
X
X
X
X
X
Muscatine Power & Water, IA
MW
X
X
Narragansett Electrical Co., RI
NE
X
X
X
X
X
Navopacheelectriec Cooperative Incorporated
EUSERC
X
X
X
X
X
X
Nema
X
X
X
X
X
Nevada Electric
X
X
X
X
X
Nevada Power Company Incorporated
X
X
X
X
X
New England Power
X
X
X
X
X
X
X
X
X
X
New Orleans Public Service, LA
NO
Newport Electric Corp., RI
NC
New York State Electric & Gas Corp., NY
NY
X
X
Niagara Mohawk Corp., NY
NM
Northern Indiana Public Service, IN
NI
X
Northern States Power Co., MN/WI/ND/SD
NS
X
Northwestern Public Service, SD
X
X
X
X
X
X
X
NP
X
X
X
NorthEast Utility
X
X
X
X
X
X
X
X
X
Norwich Dept. of Public Utilities, CT
ND
X
X
X
Norwood Municipal Light Co., MA
NL
X
X
X
Ohio Edison Co., OH
OE
X
X
Ohio Power Co., OH
OP
X
X
Omaha Public Power District, NE
OM
X
X
X
X
X
Orange & Rockland Utilities, NY
OR
X
X
X
X
X
X
X
X
Otter Tail Power Co., MN
OT
X
X
Pacific Gas and Electric
EUSERC
X
X
X
X
X
Pacific Power and Light Company
EUSERC
X
X
X
X
X
Palo Alto City of Water and Power Department
EUSERC
X
X
X
X
X
X
X
X
Parker Municipal Light Dept., SD
PM
X
X
Pasadena City of Water and Power Department
EUSERC
X
X
X
X
X
X
X
Peninsular Light Company
EUSERC
X
X
X
X
X
Pennsylvania Electric Co., PA
PE
X
X
Pennsylvania Power Co., PA
PY
X
X
X
Pennsylvania Power & Light Co., PA
PL
X
X
X
Penn Electric
X
X
Philadelphia Electric Co., PA
PH
X
X
X
X
X
Plumas-Sierra Rural Electric Company
EUSERC
X
X
X
X
X
Port Angles City Light
EUSERC
X
X
X
X
X
Portland General Electric
EUSERC
X
X
X
X
X
Potomac Edison Co., MD
PT
X
X
X
X
X
X
Potomac Electric Power Co., DC
PP
X
X
Public Service Electric & Gas Co., NJ
PS
X
X
X
X
Public Service of Colorado, CO
PC
X
X
X
X
Public Service of Indiana, IN
PI
X
X
Public Service of New Hempshire, NH
PU
X
X
Puget Sound Power and Light
EUSERC
X
X
X
X
X
Redding City of Electric Utility
EUSERC
X
X
X
X
X
118
Siemens Electrical Products and Systems
Specification Guide
X
X
X
X
CSI Section 16470
Sentron™ Switchboards
Utility Metering — Types SB1, SB2, and SB3
Table 7.30
General
Utility Reference (cont’d)
240V
480V
Electric Utility Company
Utility
Code
Hot
SB1
SB2
Richland
EUSERC
X
X
X
X
X
Riverside City of Riverside Public Utility
EUSERC
X
X
X
X
X
Rochester Gas & Electric Co., NY
RG
X
X
X
X
X
X
Rockland Electric
Cold
Hot
Cold
SB3
X
RE
X
X
Roseville City of Electric Department
EUSERC
X
X
X
X
X
Sacramento Municipal Utility District
EUSERC
X
X
X
X
X
Salem Electric
EUSERC
X
X
X
X
X
Salt River Project
EUSERC
X
X
X
X
X
San Diego Gas and Electric
EUSERC
X
X
X
X
X
Santa Clara City of Electric Department
EUSERC
X
X
X
X
X
Seatle City of Washington
EUSERC
X
X
X
X
X
Sierra Pacific Power Company
EUSERC
X
X
X
X
X
Snohomish County Public Utility District No. 1
EUSERC
X
X
X
X
X
Southern California Edison Company
EUSERC
X
X
X
X
X
Southern California Water Company
EUSERC
X
X
X
X
X
South Central Elec. Association, MN
SC
X
South Hadley Electric Light Dept., MA
SH
X
X
X
South Norwalk Electric, CT
SN
X
X
X
Southern Indiana Gas & Electric, IN
SI
X
X
X
Southern Maryland Co-Op, MD
SM
X
X
SpringField Utility Board
EUSERC
X
X
St. Louis Municipal Electric, MI
SL
X
X
Sulpher Springs Valley Electric Corporation
EUSERC
X
X
Superior Water Light & Power, MN
SW
X
X
Tacoma
EUSERC
X
Tallahassee Electric (NEMA)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Trico Electric Cooperative
EUSERC
X
X
X
X
X
Truckee Donner Public Utility District
EUSERC
X
X
X
X
X
Tucson Electric Power Company
EUSERC
X
X
X
X
X
Turlock Irrigation District
EUSERC
X
X
X
X
X
Toledo Edison, OH
TE
Ukia
EUSERC
X
X
X
X
X
X
X
X
X
Union Electric of St. Louis, MO
UE
X
X
Union Light Heat & Power Co., KY
UL
X
X
United Illuminating Co., CT
UI
Utah Power and Light
X
X
VP
X
X
Vernon
EUSERC
X
Village of Hamilton, NY
VH
Vermont Public Service, VT
Virginia Electric Power Co., VA
VE
Wakefield Municipal, MA
WM
Washing Water and Power
EUSERC
Watertown Municipal, NY
WA
Watertown Municipal Utilities, SD
WU
Wellesley Dept. of Public Works, MA
WY
X
X
Western Area Power Administration
EUSERC
X
Western Gas and Electric
X
X
X
X
X
X
X
X
WP
X
X
X
X
West Penn Power Co., PA
X
X
X
X
WestField Gas and Electric
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Western Massachusetts Electric Co., MA
WT
Westerville Electric Co., OH
WR
X
X
Wheatland Electric Co-Op., KS
WC
X
X
X
Wisconsin Electric Power Co., WI
WE
X
X
X
Wisconsin Power & Light Co., WI
WL
X
X
X
Wisconsin Public Service, WI
WS
X
X
X
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
7
Sentron™
Switchboards
Rockville Centre Electric Dept., NY
X
119
Sentron™ Switchboards
Service Sections — Utility Metering and Multi-Main Disconnects
Dimensions
Hot Sequence Only
Top Entrance Cables �
or Busway �
Bottom Entrance Cables Only �
Non-Bussed Pull Section �
Bottom Entrance Cables
Invert For Top Feed
Sentron™
Switchboards
7
Standard Utility Metering
Table 7.31 Standard Utility Dimensions
Dimensions in Inches (mm)
Height
400
Depth - Minimum — Letters Reference Chart Below
D2
D1
Bussed Pull Section
Distribution Section
SB1
SB2
SB3
SB1
SB2
SB3
SB1
SB2
SB3
A
C
E
A
C
E
A
C
E
600
A
C
E
A
C
E
A
C
E
800
A
C
E
A
C
E
A
C
E
B
D
F
B
D
F
A
C
E
B
D
F
B
D
F
A
C
E
1600
B
D
F
B
D
F
A
C
E
2000
B
D
F
B
D
F
A
C
E
Ampere
Rating
(MLO)
1000
All
Types
H1
90
(2286)
Pull
Box
H2
15
(381)
Width
Unit Space
H3 햴
H4 햴
30
(762)
65
(1651)
Minimum
All Types
W1
38
(965)
1200
All
Types
W2
32 or 38
(813 or
965)
EUSERC Utility Metering 햸
Table 7.32 EUSERC Utility Dimensions
Dimensions in Inches (mm)
Height
Ampere
Rating
(MLO)
400
Pull
Box
H2
Unit Space
Minimum
All Types
W1
H3 햴
H4 햴
햹
30 (762) 햴
65 (1651) 햴
600
햹
30 (762) 햴
65 (1651) 햴
800
햹
30 (762) 햴
65 (1651) 햴
햹
30 (762) 햴
65 (1651) 햴
1200
—
—
65 (1651) 햴
—
1600
—
—
65 (1651) 햴
2000
—
—
65 (1651) 햴
1000
햲
햳
햴
All
Types
H1
Width
90
(2286)
Verify dimensions with local utility requirements.
See page 129 for dimensions.
See page 129 for unit space of disconnect devices.
EUSERC Utility Notes:
햵 Not applicable for EUSERC.
햶 Busway available for SB3 only.
햷 Not allowed by Los Angeles Department of Water and
Power or San Diego Gas & Electric.
햸 Some jurisdictions do not allow multi-main service
equipment.
햹 400 / 1000A fed by 500 KCMIL — No pull box required.
400 / 1000A fed by 750 KCMIL — 10.0" pull box required.
120
All
Types
W2
Depth - Minimum — Letters Reference Chart Below
D2
Distribution Section
D1
Bussed Pull Section
SB1
A
SB2
C
SB3
E
SB1
A
SB2
C
SB3
E
SB1
A
SB2
C
SB3
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
—
—
—
B
D
F
A
C
E
—
—
—
—
B
D
F
A
C
E
—
—
—
—
B
D
F
A
C
E
32 or 38
(813 or
965)
32 or 38
(813 or
965)
Depth Reference Chart
A
20 in.
(508 mm)
D
28, 38 in.
(711, 965 mm)
B
28 in.
(711 mm)
E
20, 28, 38, 48, 58 in.
(508, 711, 965, 1219, 1473 mm)
C
20, 28, 38 in.
(508, 711, 965 mm)
F
28, 38, 48, 58 in.
( 711, 965, 1219, 1473 mm)
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Service Sections — Utility Metering & Single Main Disconnects (Standard Utilities)
Table 7.33
Standard Utility — Hot Sequence (C.T.’s on Line Side of Main)
Letters Reference
Chart Below
D
SB1 SB2 SB3 RCIII
A
C
E
J
—
—
A
C
—
A
C
—
C
E
—
C
E
E
E
J
E
E
J
J
J
J
J
J
—
—
B
C
—
D
E
E
F
J
J
J
—
—
B
D
—
D
F
F
F
J
J
J
—
—
B
D
—
D
F
F
F
J
J
J
—
—
B
D
—
D
F
F
F
J
J
J
—
—
—
—
D
G
G
G
F
H
H
H
J
J
J
J
—
—
—
—
—
—
D
D
D
G
G
G
F
F
F
H
H
H
J
J
J
J
J
J
—
—
—
—
—
—
—
—
—
—
—
—
J
J
J
J
J
J
J
J
J
J
J
J
A
A
A
A
B
B
B
B
B
B
—
—
—
—
—
C
C
C
C
D
D
D
D
D
D
D
D
G
G
G
E
E
E
E
F
F
F
F
F
F
F
F
G
G
G
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
Depth Reference Chart
20 in. (508 mm)
28 in. (711 mm)
20, 28, 38 in. (508, 711, 965 mm)
28, 38 in. (711, 965 mm)
CSI Section 16470
Top Entrance Cables
or Busway �
Depth Available
7
Sentron™
Switchboards
Dimensions in Inches (mm)
Height
Width
Pull Section 햲
Device Applies
NonBussed
Max.
Pull
To Switchboard
Bussed UG
Amp.
Device
Box
Rating Type
SB1 SB2 SB3 RCIII H1
H2
W1 W2
W3
Molded Case Circuit Breakers
JXD2, JXD6,
•
•
•
•
JD6, HJD6
400
14 (356)
•
•
•
SJD6
햳
•
•
CJD6, SCJD6
LXD6, LD6, HLD6
•
•
•
•
20 (508)
600
SLD6
•
•
•
•
CLD6, SCLD6
•
•
•
•
•
•
LMXD6, LMD,
HLMXD6, HLMD6,
800
MXD6, MD6, HMD6
SMD6
20 (508)
•
•
•
CMD6, SCMD6
•
•
32 (813)
•
•
•
•
NXD6, ND6,
HND6
1000
•
•
•
SND6
90
38
•
•
CND6, SCND6
(2286)
(965)
•
•
•
•
NXD6, ND6,
15 (381)
HND6
1200
•
•
•
SND6
•
•
CND6, SCND6
•
•
•
•
PXD6, PD6,
HPD6
1600
•
•
•
SPD6
•
•
—
CPD6, SCPD6
RXD6, RD6,
•
•
•
•
32 (813)
2000
HRD6
SB2000S
•
•
•
•
•
•
—
2500 햴 SB2500S
20 (508)
•
•
•
—
3000 햴 SB3000S
25 (635)
3200
STD6, SHTD6, SHHTD6
•
•
•
—
Insulated Case Circuit Breakers — Stationary Mounted 햵
800
10 (254)
32 (813) 20 (508)
•
•
•
1600
•
•
•
Type SB
15 (381)
—
2000
•
•
•
90
38
Encased
(2286)
(965)
2500 햴 Systems
32 (813)
•
•
•
3000 햴 Breaker
20 (508)
—
•
•
•
햴
4000
•
•
•
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
800
10 (254)
32 (813) 20 (508)
•
•
38
Type RL,
1600
•
•
RLF Low
15 (381) (965) —
2000
•
•
90
Voltage
(2286)
2500 햶 Power
32 (813)
•
•
햶
Circuit
3000
20 (508) 46
•
•
(1168) —
Breaker
햶
4000
•
•
Switches
•
•
•
•
14 (356)
400
�
•
•
•
•
20 (508)
600
HCP
•
•
•
•
800
15H
(381)
•
•
•
•
1200
800
•
•
•
•
20 (508)
38
1000
•
•
•
•
Vacu-Break
32 (813)
(965)
•
•
•
•
1200
90
•
•
•
•
800
15
(381)
(2286)
•
•
•
•
1000
•
•
•
•
1200
1600
•
•
•
•
Bolted
Pressure
2000
•
•
•
•
2500
•
•
•
—
32 (813)
46
3000
•
•
•
20 (508) (1168)
•
•
•
4000
A
B
C
D
Dimensions
Bottom Entrance with
Non-Bussed Pull Section
Cables Only
Bottom Entrance with
Bussed Pull Section
Cables Only
햲
E
F
G
H
J
20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
38 in. (965 mm)
38, 48, 58 in. (965, 1219, 1473 mm)
48, 58 in. (1219, 1473 mm)
Siemens Electrical Products and Systems
Specification Guide
Minimum widths shown. Refer to page 129 for optiona
widths.
Not required.
C.T. compartment must be mounted in a bussed pull
section.
햵 For Types SB3 and RCIII, drawout SB breakers are
available as an option. Minimum depth SB3 – 38 in.
(965 mm), RCIII – 48 in. (1219 mm).
햶 For fusible RLF breaker, utility compartment must be
mounted in a bussed pull section.
햷 Busway available for Type SB3 only.
햳
햴
121
Sentron™ Switchboards
Service Sections — Utility & Metering Single Main Disconnects (EUSERC Utilities)
Table 7.34
Sentron™
Switchboards
7
Dimensions in Inches (mm)
Height
Width Device
Minimum
Device
Applies
Applies
Max.
Pull Fig. Fig.
To
Switchboard
To
Figure
Amp.
Device
Box 1-3 햲 2 햲 Fig. 3
Rating Type
SB1 SB2 SB3 RCIII 1 2 3 H1
H2
W1
W2 W3
Molded Case Circuit Breakers
JXD2, JXD6,
•
•
•
•
✓ ✓ ✓
JD6, HJD6
14
400
(356)
•
•
•
✓ ✓ ✓
SJD6
•
•
✓ ✓ ✓
CJD6, SCJD6
LXD6, LD6, HLD6 •
•
•
•
✓ ✓ ✓
20
32
600
SLD6
•
•
•
✓ ✓ ✓
(508) (813)
CLD6, SCLD6
•
•
✓ ✓ ✓
32
햳
(813)
MXD6, MD6,
•
•
•
•
✓ ✓ ✓
HMD6
800
SMD6
•
•
•
✓ ✓ ✓
CMD6, SCMD6
•
•
✓ ✓ ✓
•
•
•
•
✓ ✓ ✓
NXD6, ND6,
HND6
32
1000
(813)
•
•
•
✓ ✓ ✓
SND6
38
•
•
✓ ✓ ✓ 90
CND6, SCND6
(965)
NXD6, ND6,
•
•
•
•
✓ ✓ ✓ (2286)
HND6
1200
•
•
•
✓ ✓ ✓
SND6
•
•
✓ ✓ ✓
CND6, SCND6
PXD6, PD6,
•
•
•
•
✓ ✓ ✓
HPD6
1600
20
38
•
•
•
✓ ✓ ✓
SPD6
(508) (965) —
46
•
•
✓ ✓ ✓
CPD6, SCPD6
(1168)
RXD6, RD6,
•
•
•
•
✓ ✓ ✓
2000
HRD6
SB2000S
•
•
•
✓ ✓ ✓
•
•
•
—
✓ ✓ ✓
2500 햴 SB2500S
—
•
•
•
✓ ✓ ✓
3000 햴 SB3000S
•
•
•
✓ ✓ ✓
— 32
—
3200 햴 STD6, SHTD6,
52
(813)
SHHTD6
(1321)
Insulated Case Circuit Breakers — Stationary Mounted 햵
10
32
32
800
•
•
•
✓ ✓ ✓
(254)
(813) (813)
1600
•
•
•
✓ ✓ ✓
15
Type SB
—
(381) 38
•
•
•
✓ ✓ ✓ 90
46
2000
Encased
(1168)
(965)
2500 햴 Systems
•
•
•
✓ ✓ ✓ (2286)
3000 햴 Breaker
20
—
•
•
•
✓ ✓ ✓
(508)
52
4000 햴
•
•
•
✓ ✓ ✓
(1321)
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
32
32
10
•
•
✓ ✓ ✓
800
(254) 38
(813) (813)
Type RL,
(965)
—
•
•
✓
✓
✓
1600
RLF Low
—
—
•
•
✓ ✓ ✓ 90
2000
46
Voltage
햶
(1168)
(2286)
Power
2500
— 46
•
•
✓ ✓ ✓
Circuit
햶
(1168)
3000
—
—
•
•
✓ ✓ ✓
Breaker
52
4000 햶
— —
•
•
✓ ✓ ✓
(1321)
Switches
—
•
•
•
•
✓ ✓ ✓
400
•
•
•
•
✓ ✓ ✓
600
10 (254)
HCP
800
•
•
•
•
✓ ✓ ✓
32
32
20 (508)
(813) (813)
1200
•
•
•
•
✓ ✓ ✓
•
•
•
•
✓ ✓ ✓
800
10
(254)
Vacu-Break
•
•
•
•
✓ ✓ ✓
1000
38
38
—
(965)
20 (508) (965)
•
•
•
•
✓ ✓ ✓
1200
—
•
•
•
•
✓ ✓ ✓ 90
800
32
32
(813) (813)
(2286)
—
•
•
•
•
✓ ✓ ✓
1000
38
(965)
—
•
•
•
•
✓ ✓ ✓
1200
—
•
•
•
•
✓ ✓ ✓
1600
Bolted
Pressure
46
—
—
•
•
•
•
✓ ✓ ✓
2000
(1168)
—
•
•
•
✓ ✓ ✓
2500
— 46
•
•
•
✓ ✓ ✓
3000
— (1168)
•
•
•
✓ ✓ ✓
4000
52
(1321)
122
20 in. (508 mm)
28 in. (711 mm)
20, 28, 38 in. (508, 711, 965 mm)
28, 38 in. (711, 965 mm)
E
F
G
H
J
Top Entrance Cables
or Busway �
Depth Available
Letters Reference
Chart Below
D
SB1 SB2 SB3 RCIII
A
C
E
J
—
—
A
—
—
A
C
—
C
C
—
C
E
E
E
E
E
E
J
J
J
J
J
J
—
—
B
C
—
C
E
E
E
J
J
J
—
—
B
C
—
D
E
E
B
J
J
J
—
—
B
B
—
D
B
B
B
J
J
J
—
—
B
B
—
D
B
B
B
J
J
J
—
—
—
—
B
G
G
G
B
H
H
H
J
J
J
J
—
—
—
—
—
—
D
D
D
G
G
G
F
F
F
H
H
H
J
J
J
J
J
J
—
—
J
J
—
—
—
—
—
—
—
—
—
—
J
J
J
J
J
J
J
J
J
J
A
A
A
A
B
C
C
C
C
D
E
E
E
E
F
J
J
J
J
J
B
B
B
D
D
D
F
F
F
J
J
J
B
B
B
B
—
—
—
D
D
D
D
G
G
G
F
F
F
F
H
H
H
J
J
J
J
J
J
J
Depth Reference Chart
A
B
C
D
Dimensions
EUSERC Utility — Hot Sequence (C.T.’s on Line Side of Main)
20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
38 in. (965, mm)
38, 48, 58 in. (965, 1219, 1473 mm)
48, 58 in. (1219, 1473 mm)
Siemens Electrical Products and Systems
Specification Guide
Bottom Entrance with
Non-Bussed Pull Section
Cables Only
Bottom Entrance with
Bussed Pull Section
Cables Only
햲
햳
햴
햵
햶
햷
Minimum widths shown. Refer to page 129 for optional
widths.
Not required.
C.T. compartment must be mounted in a bussed pull
section.
For Types SB3 and RCIII drawout SB breakers are
available as an option. Minimum depth SB3 – 38 in.
(965 mm), RCIII – 48 in. (1219 mm).
For fusible RLF breaker, utility compartment must be
mounted in a bussed pull section.
Busway available for Type SB3 only.
CSI Section 16470
Sentron™ Switchboards
Service Sections — Non-Utility Type with / wo Customer Metering & Main Disconnect
Table 7.35
Top Entrance Cables Pull Box
Depth Available
Letters Reference
Chart Below
D
SB1 SB2 SB3 RCIII
A
C
E
J
—
—
A
—
—
C
—
C
C
—
E
E
E
E
E
J
J
J
J
J
A
C
E
J
—
—
A
—
—
A
C
—
C
C
—
C
E
E
E
E
E
E
J
J
J
J
J
J
—
—
B
C
—
D
E
E
F
J
J
J
—
—
B
—
—
D
—
D
D
B
F
F
F
F
H
J
J
J
J
J
—
G
H
J
—
—
—
—
—
—
D
D
D
G
G
G
F
F
F
H
H
H
J
J
J
J
J
J
—
—
—
—
—
—
—
—
—
—
—
—
J
J
J
J
J
J
J
J
J
J
J
J
A
A
A
A
B
B
B
B
B
B
B
B
—
—
—
C
C
C
C
D
D
D
D
D
D
D
D
G
G
G
E
E
E
E
F
F
F
F
F
F
F
F
H
H
H
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
7
Bottom Entrance with
Non-Bussed Pull Section
Sentron™
Switchboards
Dimensions in Inches (mm)
Height Width
Pull Box
Device Applies
NonBussed
Max.
To Switchboard
Bussed UG
Amp. Device
Rating Type
SB1 SB2 SB3 RCIII H1
W1
W2
W3
Molded Case Circuit Breakers
JXD2, JXD6,
•
•
•
•
JD6, HJD6
400
14 (356)
•
•
•
SJD6
•
•
CJD6, SCJD6
32 (813)
•
•
•
•
LXD6, LD6, HLD6
600
•
•
•
SLD6
•
•
CLD6, SCLD6
MXD6, MD6, HMD6,
•
•
•
•
LMXD6, LMD6,
HLMD6, HLMXD6
800
•
•
•
SMD6
20 (508)
•
•
CMD6, SCMD6
32 (813)
NXD6, ND6, HND6 •
•
•
•
1000
•
•
•
SND6
•
•
CND6, SCND6
90
(2286)
•
•
•
•
NXD6, ND6,
HND6
38 (965)
1200
•
•
•
SND6
•
•
CND6, SCND6
•
•
•
•
PXD6, PD6,
HPD6
1600
•
•
•
SPD6
•
•
—
CPD6, SCPD6
32 (813)
•
•
•
•
RXD6, RD6, HRD6
2000
•
•
•
SB2000S
•
•
•
—
SB2500S
2500
•
•
•
SB3000S
3000
38 (965)
—
STD6, SHTD6,
3200
32 (813)
•
•
•
SHHTD6
Insulated Case Circuit Breakers — Stationary Mounted 햲
•
•
•
20 (508)
20 (508)
800
•
•
•
1600
Type SB
•
•
•
2000
90
Encased
32 (813)
—
(2286) 38 (965)
Systems
•
•
•
2500
Breaker
•
•
•
3000
38 (965)
•
•
•
4000
Low Voltage Power Circuit Breakers — Draw-Out Fusible and Non-Fusible
•
•
20 (508)
20 (508)
800
Type RL,
•
•
38 (965)
1600
RLF Low
—
•
•
2000
90
Voltage
32 (813)
(2286)
2500 햳 Power
•
•
3000 햳 Circuit
•
•
46 (1168) —
Breaker
4000 햳
•
•
38 (965)
Switches
14 (356)
400
•
•
•
•
600
•
•
•
•
HCP
800
•
•
•
•
1200
•
•
•
•
800
•
•
•
•
20 (508)
32 (813)
1000
•
•
•
•
Vacu-Break
38 (965)
1200
•
•
•
•
90
(2286)
•
•
•
•
800
•
•
•
•
1000
•
•
•
•
1200
1600
•
•
•
•
Bolted
Pressure
2000
•
•
•
•
32 (813)
•
•
•
2500
—
•
•
•
46 (1168)
3000
•
•
•
38 (965)
4000
Dimensions
Bottom Entrance with
Bussed Pull Section
Bottom Entrance
Depth Reference Chart
A
B
C
D
20 in. (508 mm)
28 in. (711 mm)
20, 28, 38 in. (508, 711, 965 mm)
28, 38 in. (711, 965 mm)
햲
For Types SB3 and RCIII, drawout SB breakers are
available as an option. Minimum depth SB3 38 in.
(965 mm), and RCIII 48 in. (1219 mm).
햳 For fusible RLF breaker, utility compartment must be
mounted in a bussed pull section.
CSI Section 16470
E
F
G
H
J
20, 28, 38, 48, 58 in. (508, 711, 965, 1219, 1473 mm)
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
38 in. (965, mm)
38, 48, 58 in. (965, 1219, 1473 mm)
48, 58 in. (1219, 1473 mm)
Siemens Electrical Products and Systems
Specification Guide
123
Sentron™ Switchboards
Combination Sections — Types SB1, SB2, and SB3
Dimensions
Combination Service Disconnect and Distribution Sections — MCCB Main
SB1 and SB2 combination service / distribution sections house both a main service disconnect device and branch distribution disconnects. Switchboards can be
furnished with “Suitable for Use as
400-1200A
Main Breaker Without GFP
physical size of the main disconnect
device. If more unit space is required
than is shown in the tables below, one or
more additional distribution sections
must be added.
Service Equipment” labels, but include
no provisions for utility metering or customer metering.
Branch circuit device unit space varies,
depending on the rating and consequent
1600-2000A Main Breaker
With or Without GFP
400-1200A
Main Breaker
With GFP
1600-2000A MCCB
With Line Through Bus
400-1200A MCCB
With Line Through Bus
Sentron™
Switchboards
7
Fig. 1 Top Entrance 햲
Table 7.36
1000
1200
1600
2000
Fig. 3
Fig. 4
Device
Applies To
Switchboard
SB1 SB2 SB3 H1
•
•
•
•
•
CLD6, SCLD6
LMD, HLMD
MXD6, MD6, HMD6
SMD6
CMD6,SCMD6
NXD6, ND6, HND6
SND6
CND6, SCND6
NXD6, ND6, HND6
SND6
CND6, SCND6
PXD6, PD6, HPD6
SPD6
CPD6, SCPD6
RXD6, RD6, HRD6
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Dimensions in Inches (mm)
Height
Unit Space U1
햶
햷
Pull
Box Load Through-Bus
H2 Without With
햷
—
90
(2286)
53.75 (1365)
52.50 (1334)
42.50 (1080)
52.50 (1334)
52.50 (1334)
53.75 (1365) 45.00 햻
52.50 (1334) (1143)
40.00 (1016) —
52.50 (1334)
52.50 (1334)
45.00
42.50 (1080) 40.00 (1016) (1143)
52.50 (1334) 52.50 (1334)
52.50 (1334) 52.50 (1334)
—
—
A
—
—
A
A
— —
—
38 A
(965)
C
—
C
C
—
C
C
C
—
C
E
E
E
E
E
E
E
E
E
E
B
B
B
B
B
A
B
B
B
B
D
D
D
D
D
C
D
D
D
D
F
F
F
F
F
E
F
F
F
F
— —
—
38 A
(965)
C
—
D
E
E
E
B
B
B
D
D
D
F
F
F
— —
—
B
38
38
(965) —
(965)
—
B
D
—
D
D
—
D
E
F
F
F
F
F
B
B
B
B
B
B
D
D
D
D
D
D
F
F
F
F
F
F
—
38 38
(965) (965)
햸
햸
42.50 (1080) 40.00 (1016)
52.50 (1334) 52.50 (1334)
햺
—
—
30.00
(762)
—
—
Depth Available
Conduit
Area
Letters Reference
Chart Below
Main Mtg. Svc.
D1
D2
Loca- Posi- Ent.
SB1 SB2 SB3 SB1 SB2 SB3 K
L
tion tion Lbl.
A
C
E
B
D
F
32
(813)
or
38
(965)
햻 32
32
56.25 (1429) 53.75 (1365) 46.25
(1175) (813) (813)
•
•
•
•
•
•
•
•
•
Width
Fig.
Fig. Fig. Fig. 4 &
Unit
5
1
2
3
Space
U2
W1 W2 W3 W4
햶
Depth Reference Chart
A
20 in.
(508 mm)
D
28, 38in.
(711, 965 mm)
B
28 in.
(711 mm)
E
20, 28, 38, 48, 58 in.
( 508, 711, 965, 1219, 1437 mm)
C
20, 28, 38 in.
(508, 711, 965 mm)
F
28, 38, 48, 58 in.
( 711, 965, 1219, 1437 mm)
124
Fig. 5
Main Breaker with or without Ground Fault Protection
Max.
Amp. Breaker
Rtg. Type
JXD2, JXD6,
JD6, HJD6
400
SJD6
CJD6, SCJD6
LXD2, LXD6,
600 HLD6, SLD6
800
Fig. 2 Bottom Entrance 햲
Siemens Electrical Products and Systems
Specification Guide
Yes
Top
or
Bottom
Horiz.
햽
2.50 3.00
(64) (76)
Yes 햹
Top
Vert.
햲
햳
햴
햵
햶
햷
햸
햹
햺
Unit may be inverted.
Load cables must exit bottom.
Refer to Table 7.41 for dimensions.
Not available with load through bus.
Ground fault, if applied, uses 10 in. (254 mm) of unit space.
See page 128 for unit space of disconnect devices.
46 in. (1168 mm) wide if 750 kcmil lugs required.
Service entrance label at 480V requires ground fault.
Pull box height: Standard 500 kcmil lugs = 10 in. (254 mm)
Alternate 750 kcmil lugs = 15 in. (381 mm)
햻 For use with 100% rated breakers.
햽 Vertical mounted when using 100% rated devices.
CSI Section 16470
Sentron™ Switchboards
Combination Sections — Types SB1, SB2, and SB3
Dimensions
Combination Service Disconnect and Distribution Sections
Main Vacu-Break®
400 and 600A Vacu-Break
800 and 1200A Vacu-Break
400 and 600A Vacu-Break햸
800 and 1200A Vacu-Break
400 & 600A
Vacu-Break
Main
Switch
7
H3
Top Entrance and Invert
for Bottom Entrance햷
Bottom Entrance
Invert for Top Entrance
Sentron™
Switchboards
Top Entrance and Invert
for Bottom Entrance
Bottom Entrance
Invert for Top Entrance
Table 7.37—400–1200A Vacu-Break Switch Main
Dimensions in Inches (mm)
Height
Unit Space - H3 햶
Top
With
Without
Maximum Applies To
Pull
Load
Load
Switchboard
Ampere
Box
Through
Through
SB1 SB2 SB3 H1
Rating
H2
Bus
Bus
400
•
•
•
600
•
•
•
800
•
•
•
1200
•
•
•
—
90.00
(2286)
10.00 햷
(2.54)
43.75 (1111)
36.25 (921)
41.25 (1048)
33.75 (857)
30.00 (762)
Depth Reference Chart
A
20 in. (508 mm)
B
C
28 in. (711 mm)
D
28, 38 in. (711, 965 mm)
E
20, 28, 38, 48, 58 in. ( 508, 711, 965, 1219, 1473 mm)
F
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
햲
햳
햴
30.00 (762)
Width
Unit
Space
H4 햶
43.75 (1111)
30.00 (762)
W
38.00 햵
(965)
38.00 (965)
Depth Available
Letters Reference
Chart Below
Conduit
D1
D2
Area
SB1 SB2 SB3 SB1 SB2 SB3 K
L
Service
Main
Entrance
Location Label
A
C
E
B
D
F
A
C
E
B
D
F
Top
or
Bottom
Yes
B
D
F
B
D
F
B
D
F
B
D
F
Top
or
Bottom
Yes 햴
Load cables must exit bottom.
Refer to page 129 for dimensions.
Service entrance label at 240V only.
햵
햶
햷
2.50
(64)
3.00
(76)
38 in. (965 mm) wide standard, 32 in. (813 mm) wide
available as an option.
See page 130 for unit space of disconnect devices.
15 in. (381 mm) pull box when alternate 750 kcmil lugs.
20, 28, 38 in. (508, 711, 965 mm)
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
125
Sentron™ Switchboards
Combination Sections — Types SB1, SB2, and SB3
Dimensions
Combination Service Disconnect and Distribution Sections
HCP Switch and Bolted Pressure Switch
400 – 1200A HCP햶
400A – 1200A HCP
400-1200A
HCP
Main Switch
400-1200A
HCP
Main Switch
7
Sentron™
Switchboards
H3
Top Entrance and Invert
for Bottom Entrance
Bottom Entrance
Invert for Top Entrance
Table 7.38 400–1200A HCP Switch Main
Dimensions in Inches (mm)
Maximum Applies To
Switchboard Height
Ampere
SB1 SB2 SB3 H1
Rating
400
•
•
•
•
•
• 90.00
600
800
•
•
• (2286)
1200
•
•
•
Unit Space
H3 햴
Width
W
46.25
(1175)
38.00
(965)
Depth Available
Letters Reference Chart Below
D1
D2
SB1 SB2 SB3 SB1 SB2 SB3
A
C
E
B
D
F
A
C
E
B
D
F
B
D
F
B
D
F
B
D
F
B
D
F
Service
Main
Entrance
Location Label
Conduit Area
K
L
2.50
(64)
3.00
(76)
Depth Available
Letters Reference
Chart Below
D
SB1
SB2
SB3
Conduit
Area 햷
K
L
B
D
F
B
D
F
B
D
F
B
D
F
Top
or
Bottom
Yes
Table 7.39—800–2000A Bolted Pressure Switch Main, with or without Ground Fault
Dimensions in Inches (mm)
Height
Top Pull Box — H2
Maximum Applies To
500
750
Switchboard
Ampere
kcmil
kcmil
SB1 SB2 SB3 H1
Rating
Lugs
Lugs
800
•
•
•
1200
•
•
•
1600
•
•
•
2000
•
•
•
90.00
(2286)
10
(254)
20
(508)
Unit
Space
H3 햴
30
(762)
2.50
(64)
Service
Main
Entrance
Location Label
Yes
3.00
(76)
Top
Yes 햵
Depth Reference Chart
Conduit Area
Top or Bottom
Conduit Area
Top or Bottom
햲
햳
햴
햵
햶
햷
38
(711 mm)
Top Entrance
126
A
20 in. (508 mm)
B
C
28 in. (711 mm)
D
28, 38 in. (711, 965 mm)
E
20, 28, 38, 48, 58 in. ( 508, 711, 965, 1219, 1473 mm)
F
28, 38, 48, 58 in. ( 711, 965, 1219, 1473 mm)
20, 28, 38 in. (508, 711, 965 mm)
Load cables must exit bottom.
See page 129 for dimensions.
See page 130 for unit space of disconnect devices.
On bolted pressure switch rated 1000A or greater
without ground fault, service entrance label for
240V only.
Not available with load thru bus.
Conduit restricted to rear 10 in. (254 mm) for inverted
bottom entrance.
38
(711 mm)
Bottom Entrance
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Distribution Sections — Types SB1, SB2, and SB3
Dimensions
Main Lug Only –– 400A through 2000A
Top Feed
Bottom Feed
7
Sentron™
Switchboards
햲
햲
Bottom Entrance
Table 7.40—Main Lug Only Unit Space
Dimensions in Inches (mm)
Maximum
Ampere
Rating
400
600
Section
Configuration
Suitable
for Use As
Service
Entrance
Equipment
햴 햵
Single without
Through-Bus Only
Single without
Through-Bus Only
Single without
Through-Bus Only
Yes
Multi With
Through-Bus
Yes
Yes
Height
Distribution Unit Space 햲
Lugs
AIC
Rating
H1
200,000
Yes
800
42,000
100,000
Single without
Through-Bus Only
Yes
1200
Multi With
Through-Bus
200,000
90.00
(2286)
42,000
Yes
Standard
500 kcmil
Alternate Crimp
750 kcmil 600 kcmil Max. W 햲
62.50
(1588)
60.00
(1524)
58.75
(1492)
51.25
(1302)
45.00
(1143)
57.50
(1461)
50.00
(1270)
60.00
(1524)
56.25
(1429)
52.50
(1334)
45.00
(1143)
38.75
(984)
50.00
(1270)
42.50
(1080)
55.00
(1397)
55.00
(1397)
53.75
(1365)
46.25
(1175)
45.00
(1143)
53.75
(1365)
46.25
(1175)
Yes
Multi With
Through-Bus
Yes
1600
32 or 38
(813 or
965)
38
(965)
32 or 38
(813 or
965)
38
(965)
100,000
Single without
Through-Bus Only
Width
200,000
Depth Available
Letters refer To
Chart Below
D
SB2
SB3
SB1
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
A
C
E
K
L
2.50
(64)
3.00
(76)
42,000
45.00
(1143)
100,000
Single without
Through-Bus Only
Yes
Multi With
Through-Bus
Yes
2000
38.75
(984)
45.00
(1143)
200,000
38
(965)
42,000
100,000
햲
햳
햴
햵
46 in. (1168) width available as an option.
See page 130 for unit space of disconnect devices.
Maximum of 6 disconnect devices only.
SUSE service disconnects 1000A or higher on sodily
grounded wye systems of more than150V to ground
required ground fault protection.
Ground fault uses 10 in. (254 mm) of unit space. See
NEC 230-95 for additional details. This applies to branch
devices 1000A or larger on non-service equipment
unless ground fault protection is provided upstream at
the service. See NEC 240-13 for further information.
CSI Section 16470
Depth Reference Chart
A
20 in.
(508 mm)
C
20, 28, 38 in.
(508, 711, 965 mm)
E
20, 28, 38, 48, 58 in.
(508, 711, 965, 1219, 1473 mm)
Siemens Electrical Products and Systems
Specification Guide
127
Sentron™ Switchboards
Distribution Sections — Types SB1, SB2, and SB3
Unit Space for Disconnect Devices
Table 7.41
Sentron™
Switchboards
7
Max.
Amp. Device
Rating Type
Branch Breakers
BL, BLH, HBL, BQD
100
ED2, ED4, HHED6
ED2, ED4, ED6, HED4, HHED6
HED4, HHED6, ED2, ED4,
125 ED6 With Accessories
CED6
CED6 With Accessories
225 QJ2, QJH2, QJ2-H, HQJ2-H
FXD6, FD6, HFD6, HFXD6,
250 HHFD6, HHFXD6
CFD6
JXD2, JXD6, JD6, HJD6,
HJXD6, HHJD6, HHJXD6
400 SJD6, SHJD6
CJD6
SCJD6
LXD6, LD6, HLD6, HLXD6,
HHLD6, HHLXD6
600 SLD6, SHLD6
CLD6
SCLD6
LMD6, LMXD6, HLMD6,
HLMXD6
MXD6, MD6, HMD6,
800
HMXD6
SMD6, SHMD6
CMD6
NXD6, ND6, HND6, HNXD6
1200 SND6, SHND6
CND6, SCND6
Main Breakers
FXD6, FD6, HFD6, HFXD6
250
CFD6
JXD2, JXD6, JD6, HJD6,
HJXD6, HHJD6, HHJXD6
400 SJD6, SHJD6
CJD6,
SCJD6
LXD6, LD6, HLD6, HLXD6,
HHLD6, HHLXD6
600 SLD6, SHLD6
CJD6,
SCJD6
LMD6, LMXD6, HLMD6,
HLMXD6
MXD6, MD6, HMD6,
800
HMXD6
SMD6, SHMD6
CMD6
NXD6, ND6, HND6, HMXD6
1200 SND6, SHND6
CND6, SCND6
Table 7.42
Max.
Amp.
Rating
30-30
30-30
30-60
60-60
60-100
100-100
200-200
100
200
400
600
400-1200
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Dimensions in Inches (mm)
Width
Height
Total Poles
Available
1P
2P
3P
Unit Space H2
Twin
Single
Mounted
Mounted
18
6
8
2
2
6
—
2
10.00 (254)
•
2
2
6.25 (159)
•
•
•
2
2
2
2
2
2
3.75 (95)
6.25 (159)
5.00 (127)
•
2
2
5.00 (127)
•
—
1
2
—
1
—
1
1
2
—
—
8.75 (222)
•
•
•
•
•
•
—
•
•
1
•
•
•
•
—
1
—
•
Enclosure
Minimum
W
3.75 (95)
—
5.00 (127)
8.75 (222)
—
32.00 (813)
32.00 (813)
32.00 (813)
38.00 (965)
햳
8.75 (222)
32.00 (813)
D for Type SB2 = 28, 38 in. (711, 965 mm)
D for Type SB3 = 28, 38, 48, 58 in. (711, 965,
1219, 1473 mm)
2 High Bolted Pressure Switch
Distribution Section
1
—
•
1
•
•
•
•
•
•
•
•
•
•
1
•
•
•
•
•
—
•
•
•
1
•
•
•
•
•
•
—
1
—
1
—
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
10.00 (254)
38.00 (965)
—
•
•
Conduit Area
Top or Bottom
—
5.00 (127)
—
32.00 (813)
8.75 (222)
1
—
1
—
SB3 only
Vacu-Break Combination
Distribution Section
1
•
•
•
—
10.00 (254)
38.00 (965)
1
—
Conduit Area
Top or Bottom
Vacu-Break
Device
Applies To
Switchboard
SB1 SB2 SB3
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Dimensions in Inches (mm)
Mounting Height
240V
600V
Twin
Single
Twin
—
2.50 (64)햲
5.00 (127)
—
7.50 (191)
Width
Single
—
Enclosure
Minimum
W
32.00 (813)
7.50 (191)
10.00 (254)햳
7.50 (191)
10.00 (254)
—
15.00 (381)
16.25 (413)
10.00 (254)햴
—
—
—
7.50 (191)
10.00 (254)
15.00 (381)
햳
38.00 (965)
16.25 (413)
햲
The 2.5 in. (64) high unit is suitable for NEC Class H, K1, and K5 fuses only. Class R rejection type fuse holders
are not available.
햳 Unit rated 600V, factory configured to accept 250V class H, K or R Fuses. Field convertible to accept class J Fuses.
햴 Factory configure to accept Class J Fuses only.
128
Conduit Area
Top or Bottom
Unit Space Requirements — Branch Switches
Switch
Type
HCP
2 High Vacu-Break Distribution Section
Unit Space Requirements — Molded Case Circuit Breakers
Device
Applies To
Switchboard
SB1 SB2 SB3
Dimensions
Siemens Electrical Products and Systems
Specification Guide
햳
D for Type SB2 = 28, 38 in. (711, 965 mm)
D for Type SB3 = 28, 38, 48, 58 in. (711, 965,
1219, 1473 mm)
CSI Section 16470
Sentron™ Switchboards
Distribution Sections — Types SB1, SB2, and SB3
Dimensions
Through-Bus Fed
Table 7.43
Through-Bus Fed Dimensions
Through-Bus Fed
Distribution Sections
Dimensions in Inches (mm)
Height
Width
Maximum
Riser
Amperage
2000
3000
햲
햳
With
Maximum
Through-Bus
Amperage
2000
3000
4000
As Applied to
Switchboard
SB1 SB2 SB3 H1
•
•
•
•
•
90.0
•
•
(2286)
•
4000
•
Depth Available
Letters Reference
Chart Below
D
SB1 SB2 SB3
A
C
E
—
C
E
—
G
H
Unit
Space
H2 햲 W
65.0
(1651)
32.0 or 38.0 햳
(965)
(813)
62.5
(1588)
38.0 or 46.0
(965)
(1168)
—
G
Conduit
Area
K
L
2.5 3.0
(64) (76)
H
See page 128 for unit space of disconnect devices.
46.00 (1168) width optional
7
Depth Reference Chart
20 in.
(508 mm)
E
20, 28, 38, 48, 58 in.
(508, 711, 965, 1219, 1473 mm)
B
28 in.
(711 mm)
G
38 in.
(965, mm)
C
20, 28, 38 in.
(508, 711, 965 mm)
H
38, 48, 58 in.
(965, 1219, 1473 mm)
J
48, 58 in.
( 1219, 1473 mm)
Sentron™
Switchboards
A
Non-Bussed and Bussed Pull Sections
Table 7.44
Non-Bussed & Bussed Pull Sections — Standard Utilities and EUSERC Utilities
Standard Pull Section Dimensions in Inches (mm)
Hgt. Width
Non-Bussed
Amp.
Rtg. H
Std. 햴
14
(356)
400
32
(813)
20
(508)
600
800
1000
1200
90
1600 (2286)
2000
2500
3000
38
(965)
5000
6000
46
(1168)
A,B
20
(508)
38
(965) or
46 햵
(1168)
38
(965)
32
(813)
4000
햴
햵
햶
Opt. 햴
20
(508)
Bussed
Std. with
Customer
Metering 햴
46
(1168)
52
(1321)
Depth Available
Letter Reference
Chart Above
With Utility D
Metering 햴 SB1 SB2 SB3
32
(813)
46
(1168)
46
(1168)
C
E
EUSERC Pull Section Dimensions in Inches (mm)
Hgt. Width
Depth Available
Letter Reference
Chart Above
Bussed with Utility
Bussed Metering
D
Std.
Std.
Opt.
SB2
SB3
RCIII H
SB1
RCIII
J
A,B
C
E
J
A,B
C
E
J
38
(965)
A,B
A,B
B
B
B
C
C
B,G
B,G
B,G
G
G
E
E
B, H
H
H
H
H
J
J
J
J
J
J
J
—
—
G
H
J
—
—
J
J
32
(813)
32
(813)
38
(965)
38
(965)
38
(965)
—
—
46
(1168)
—
A,B
C
E
J
A,B
A,B
A,B
A,B
A,B
—
—
C
C
C
C
C
G햵
G햵
E
E
E
E
E
H햵
H햵
J
J
J
J
J
J
J
—
G
H
J
52
(1321)
—
—
—
—
H
H
J
J
—
90
(2286)
46
(1168)
Top or bottom feed.
Pull sections without utility meters can be 28 in. (711 mm) deep minimum.
Determined by specific utility used.
Non-Bussed
Pull Section
H
Bussed
Pull Section
H
Width
CSI Section 16470
Bussed Pull Section
with Utility Compartment
H
Width
Siemens Electrical Products and Systems
Specification Guide
Width
129
Sentron™ Switchboards
Distribution Sections — Type SB3 Only
Molded Case Circuit Breakers for
Combination Motor Starter
Applications
Application Note:
ETI instantaneous- trip circuit breakers
are recommended for use in combination
motor starters to provide selective short
circuit protection for the motor branch circuit. The adjustable instantaneous-trip
Sentron™
Switchboards
7
Dimensions
feature provides for a trip setting slightly
above the peak motor inrush current.
With this setting, no delay is introduced
in opening the circuit when the fault
occurs. Since these circuit breakers have
no time-delay trip element, they must be
used in conjunction with, and immediately ahead of, the motor-running overcurrent protective device.
Table 7.47 Full Voltage
Non–Reversing Starters Class A20
Table 7.45 ETI Circuit Breakers (Instantaneous Trip Only)
For Branch-Circuit Use with AC Full Voltage Motor Starters
Maximum 3Ø Ratings
Ampere
Rating
3
5
10
25
50
100
150
225
Breaker
Type
220(208)V
—
0.5
2
5
15
30
40
50
ED 햳
FJ6 햴
FJ6, CFD
240V
—
0.5
2
5
15
30
40
50
480V 햳햴
1
2
3
10
30
60
75
100
Mounting Height in Inches (mm)
Min. Section
Width inches (mm)
Twin
Single
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
—
5 (127)
32 (813)
Table 7.46 Vacu-Break Fusible Switches
For Branch Circuit Use with AC Combination Full Voltage Starters 햵
Horsepower Ratings
Mounting Height in Inches (mm)
240V AC
480V AC
240V AC
480V AC
Min.
Ampere With NEC With DualWith NEC With DualSec.
Rating
Fuse
Element Fuse Fuse
Element Fuse Twin Single Twin Single Width
2.50 햲
—
—
—
—
—
32
3
7.5
30-30
(64)
30-30
3
7.5
5
10
5.00
(127)
—
7.50
(191)
—
32
30-60
3–7.5
7.5–15
5–15
25
5.00
(127)
—
7.50
(191)
—
32
60-60
7.5
15
15
25
5.00
(127)
—
7.50
(191)
—
32
—
7.50
(191)
—
32
—
7.50
(191)
—
32
32
60-100
7.5–15
15–30
15–25
25–50
7.50
(191)
100-100
15
30
25
50
7.50
(191)
100
—
—
25
50
—
—
—
7.50
(191)
200
25
50
50
100
—
10.00
(254)
—
10.00
(254)
32
—
10.00
(254)
—
32
15.00
(381)
15.00
(381)
—
15.00
(381)
15.00
(381)
38
200-200
—
50
—
100
10.00
(254)
400
50
100
100
—
—
600
75
100
—
—
—
The voltage and interrupting rating of the
circuit breaker should be checked to
assure that they are adequate for the
electrical system. ETI circuit breakers are
UL recognized components and must be
used if the switchboard section is also to
be UL Listed.
—
NEMA
Starter Size
Left
Right
—
0
0
0
—
1
0
1
1
1
—
2
0
2
1
2
2
2
—
3
0
3
1
3
2
3
3
3
4
—
Unit space
Mtg. Ht.
In. (mm)
Min. Encl.
Width
In. (mm)
5햳
(127)
32
(813)
5햳
(127)
32
(813)
10
(254)
32
(813)
15
(381)
32
(813)
15
(381)
32
(813)
햲 Increase
to 7.50 in. (191 mm) when pilot light or control
transformer is required.
Table 7.48 Maximum 3 Phase
Horsepower Rating
NEMA
Starter
Size
0
1
2
3
4
Voltage AC
220(208)V
3
7.5
10
25
40
240V
3
7.5
15
30
50
480V
5
10
25
50
100
38
햲 The
2.50 in. (64 mm) high unit is suitable for NEC Class H and K5 fuses only. Class R rejection type fuse holders are not
available.
햳 100,000 kA at 480V with E–Frame and CFD–Frame breakers.
햴 65,000 kA at 480V with F–Frame Breakers.
햵 100,000 kA at 480V with Class J or Class RK5 fuses.
130
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Distribution Sections — Type RCIII
Table 7.49
Breakers
Individually Mounted Molded Circuit
Max.
Ampere Breaker
Rating Type
ED2, ED4, ED6,
HED4, HHED6
100
CED6
250
400
800
1200
1600
2000
Unit
Space
Mounting
in Inches
Fixed Plug-In (mm)
7.50
✔
✔
(191)
Number of
Breakers
For Width
32 Inches 38 Inches
(813 mm) (965 mm)
1 to 6
1 to 8
✔
✔
12.50
(318)
1 to 6
1 to 8
FXD2, FD6, HFD6,
HHFD6
✔
✔
10.00
(254)
1 to 4
1 to 6
CFD6
✔
✔
1 to 4
1 to 6
JXD2, JXD6, JD6,
HJD6, SJD6, HHJXD6,
HHJD6, SHJD6
CJD6, SCJD6
✔
✔
15.00
(381)
12.50
(318)
1 or 2
1 or 2
✔
✔
1 or 2
1 or 2
LXD6, LD6, HLD6,
SLD6, HHLXD6,
HHLD6, SHLD6
CLD6, SCLD6
✔
✔
20.00
(508)
12.50
(318)
1 or 2
1 or 2
✔
✔
1 or 2
1 or 2
MXD6, MD6, HMD6,
SMD6, HHMXD6,
HHMD6, SHMD6
CMD6, SCMD6
✔
✔
20.00
(508)
22.50
(572)
1 or 2
1 or 2
✔
✔
22.50
(572)
1 or 2
1 or 2
NXD6, ND6, HND6,
SND6, HHNXD6,
HHND6, SHND6
CND6, SCND6
✔
✔
22.50
(572)
1 or 2
1 or 2
✔
✔
1 or 2
1 or 2
PXD6, PD6, HPD6,
SPD6, HHPXD6,
HHPD6, SHNPD6
CPD6
✔
—
22.50
(572)
27.50
(699)
1 or 2
1 or 2
✔
—
27.50
(699)
1 or 2
1 or 2
RXD6, RD6,
HRD6, HHRXD6
✔
—
27.50
(699)
1 or 2
1 or 2
7
Sentron™
Switchboards
600
Dimensions
Table 7.50 Standard Branch Load Connectors
Bolt-On and Plug-In
Wires per Barrel
Number of Barrels
Per Phase
CL
100
1-10 — #14 Cu. or
1-10 — #15AI.
1
� Transition section required when main disconnect is a service
225
1-350 kcmil — #16 Cu.-AI
1
400
1-750 — 250 kcmil or
2-250 kcmil — 3/0 Cu.-AI.
1
600
1-750 — 250 kcmil or
2-250 kcmil — 3/0 Cu.-AI.
2
800
1-750 kcmil — 4/0 Cu.-AI. or
2-3/0 — 400 kcmil AI.or
2-3/0 — 300 kcmil Cu.
3
1200
1-750 kcmil — 4/0 Cu.-AI. or
2-3/0 — 400 kcmil AI.or
2-3/0 — 300 kcmil Cu.
4
1600
1-750 kcmil — 3/0 Cu.-AI.
6
2000
1-750 kcmil — 3/0 Cu.-AI.
7
Ampere
Rating
CSI Section 16470
78 in (1982 mm) from floor max. allowed by NEC 380-8(a)
section with the following:
Molded Case Circuit Breaker 400A-3200A
Vacu-Break Switch 800A-1200A
HCP Switch 400A-1200A
Bolted Pressure Switch 800A-4000A
Low Voltage Power Air Circuit Breaker 800A-4000A
Insulated Case 800-4000A
Siemens Electrical Products and Systems
Specification Guide
131
Sentron™ Switchboards
Distribution Sections — Type RCIII
Dimensions
Circuit Breaker, Series “D” Arrangements
38.00 (965.2) CUB
32.00 (812.8) CUB
6
8
6
4
4
2
1
2
38.00 (965.2) CUB
32.00 (812.8) CUB
3
1
5
3
4
7.50
(190.5)
5
7
7.50
(190.5)
2
1
38.00 (965.2) CUB
32.00 (812.8) CUB
2
3
6
4
2
1
3
Sentron™
Switchboards
7
6
4
2
1
(250A) CFD6
Stationary or plug-in mounted 2.5 in.
(63.5 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
2
3
5
6
4
2
1
3
5
7
8
6
4
2
2
1
12.50
(317.5)
(400A) JXD2, JXD6, JD6, HJD6, HHJD6,
HHJXD6, SJD6, SHJD6
햲(600A) LXD6, LD6, HLD6, HHLD6,
HHLXD6, SLD6, SHLD6
Stationary or plug-in mounted 2.5 in.
(63.5 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
2
3
1
12.50
(317.5)
5
3
7
20.00
(508)
38.00 (965.2) CUB
2
1
27.50
(698.5)
(1600A) PD6, PXD6, HPD6, SPD6, SHPD6,
CPD6
Stationary mounted only may be
mounted in top position.
2
1
27.50
(698.5)
10.00
(254)
2
(250A) FXD6, FD6, HFD6, HHFD6
Stationary or plug-in mounted 2.5 in.
(63.5 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
1
20.00
(508)
(400A) CJD6, SCJD6
햲(600A) CLD6, SCLD6
Stationary or plug-in mounted 2.5 in.
(63.5 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
햲 Smaller
frame breakers may be mixed with larger
frame breakers.
132
(800A) MD6, MXD6, HMD6, SMD6,
SHMD6, CMD6, SCMD6
햲(1200A) ND6, NXD6, HND6, SND6,
SHND6, CND6, SCND6
Stationary mounted only may be
mounted in top position.
1
10.00
(254)
5
1
38.00 (965.2) CUB
38.00 (965.2) CUB
32.00 (812.8) CUB
38.00 (965.2) CUB
32.00 (812.8) CUB
4
1
12.50
(317.5)
(100A) CED6
Stationary or plug-in mounted 5.0 in.
(127.0 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
6
1
12.50
(317.5)
2
8
2
22.50
(571.5)
38.00 (965.2) CUB
32.00 (812.8) CUB
38.00 (965.2) CUB
32.00 (812.8) CUB
22.50
(571.5)
5
10.00
(254)
(100A) ED2, ED4, ED6, HED4, HHED6
Stationary or plug-in mounted 5.0 in.
(127.0 mm) minimum blank cover above
is required when this is top row of circuit
breakers.
1
10.00
(254)
Siemens Electrical Products and Systems
Specification Guide
(2000A) RD6, RXD6, HRD6, HHRXD6
Stationary mounted only may be
mounted in top position.
Note:
Numbers on breaker positions indicate
sequence in which standard design
picks out correct bus and covers for
particular quantity of breakers or provisions required. Space only not available.
CSI Section 16470
Sentron™ Switchboards
Distribution Sections — Type RCIII
Type RL Drawout Circuit
Breakers
Dimensions
Type SB Insulated Case Circuit Breakers
100% Rated, Stationary and Drawout
7
Sentron™
Switchboards
4 High 2000A Frame
6 High 800A Frame
Table 7.51
Non-Fusible
Fusible
A
RL800
through
RL2000
RLF800
through
RLF2000
B
RL800
through
RL2000
RLF800
through
RLF2000
C
RL800
through
RL2000
RLF800
through
RLF2000
D
RL800
through
RL2000
RLF800
through
RLF2000
Ratings for Both Type RL and SB
Breakers
쐍 Maximum thru bus rating –– 4000A
쐍 Maximum section rating –– 4000A
쐍 Maximum voltage rating –– 600V
Combination 800 & 2000A
Frames
Table 7.52
Combination 800 – 2000A
Frames
Type RCIII Distribution Sections for RL and Breakers
Dimensions in Inches (mm)
Ampere Rating
800 to
2000
Breaker Type
RL
SB
CSI Section 16470
Height
H1
Width
W1
Depth
D1
Conduit Area
W2
W3
D2
90.0 (2286)
25.0 (635)
58.0 (1473)
19.0 (483)
2.5 (64)
Siemens Electrical Products and Systems
Specification Guide
3.0 (76)
D3
13.0 (330)
15.0 (381)
D4
42.5 (1080)
40.5 (1029)
133
Sentron™ Switchboards
Distribution Sections — Type RCIII
Dimensions
Vacu-Break Switches
Bolted Pressure Switches
100 – 600 Ampere Switches
800 & 1200 Ampere Switches
Sentron™
Switchboards
7
Table 7.53
Panel Mounted Vacu-Break Mounting Height
Ampere Rating
240V or 600V
Mounting Height
in Inches (mm)
30/30
7.50 (191)
60/60
100/100
200
10.00 (254)
200/200
400
15.00 (381)
600
Table 7.54 Type RCIII Distribution Sections for Two & Three High Vacu-Break,
Two High Bolted Pressure Switches
Dimensions in Inches (mm)
Ampere Rating
800 to 2000
Switch Type
Vacu-Break
Bolted Pressure
134
Height
H1
Width
W1
Depth
D1
Unit Space
H2
Conduit Area
W2
W3
D2
90.0 (2286)
38.0 (965)
48.0 (1219)
or 58.0 (1473)
55.0 (1397)
32 (813)
2.5 (64)
Siemens Electrical Products and Systems
Specification Guide
3 (76)
D3
D4
22 (559)
23.5 (597)
or 32 (813)
7.5 (191)
38 (965)
or 17.5 (445)
CSI Section 16470
Sentron™ Switchboards
Tie Sections
Dimensions
Power Circuit Breaker Type RLF –– Draw-Out Fused
Table 7.55 Type RCIII Type Breaker
Section with RLF LV Power Breaker
Dimensions in Inches (mm)
Ampere
Rating
Height
H1
Width
W1
Depth
D1
800 to
4000
90.0 (2286)
38.0 (965)
58.0 (1473)
Sentron™
Switchboards
Molded Case Circuit Breakers, Insulated Case Circuit Breakers, Bolted Pressure Switches
Table 7.56
Ampere
Rating
400 to
3200
H
Table 7.57
Ampere
Rating
Tie
Device
D
W
Molded Case Circuit Breakers
Dimensions in Inches (mm)
Height
Width
W
H
90.0 (2286)
38.0 (965)
400 to
4000
5000
Table 7.58
Ampere
Rating
90.0 (2286)
Depth
D
38.0 (965)
48.0 (1219)
58.0 (1473)
Bolted Pressure Switches햳
Dimensions in Inches (mm)
Height
Width
W
H
2500 to
4000
Depth
D
38.0 (965)
90.0 (2286)
5000햲
CSI Section 16470
38.0 (965)
46.0 (1168)
800 to
2000
햲
햳
Depth
D
38.0 (965)
48.0 (1219)
58.0 (1473)
Insulated Case Circuit Breakers
Dimensions in Inches (mm)
Height
Width
W
H
46.0 (965)
52.0 (965)
38.0 (965)
48.0 (1219)
58.0 (1473)
48.0 (1219)
58.0 (1473)
Not UL Listed.
Fusible or Non Fusible.
Siemens Electrical Products and Systems
Specification Guide
7
135
Sentron™ Switchboards
Service Entrance Busway
Available For Types SB3
and RCIII Only
Siemens Sentron™ busway is ideal for
service entrance use with Siemens Types
SB3 and RClll switchboards. It is a lowreactance power busway available with
aluminum or copper bars in 3-phase,
3-wire or 3-phase, 4-wire configuration,
with or without ground bar.
Dimensions
switchboard front and side planes.
Phasing shown conforms to NEMA standards and is preferred, unless alternate
phasing is required by special customer
terminations.
Consult Section 10, beginning on page
177 for complete details on Siemens
Sentron™ Busway.
Dimensions and Phase Sequence
The drawings below show the phase
sequence and the location of the
center-line of the busway opening for
each configuration, referenced to the
All widths
All widths
7
Sentron™
Switchboards
38.0 in.
28.0 in.
20.0 in.
(965 mm)
(711 mm)
(508 mm)
38.0 in.
28.0 in.
20.0 in.
(965 mm)
(711 mm)
(508 mm)
N
C
B
A
ABCN
SB3 Switchboard Busway
Phasing Front to Rear
400 – 4000 Amperes
SB3 Switchboard Busway
Phasing Left to Right
400 – 4000 Amperes
58.0 in.
48.0 in.
(1473 mm)
(1219 mm)
58.0 in.
48.0 in.
(1473 mm)
(1219 mm)
N
C
B
A
19.0 in.
(483 mm)
SB3 or RCIII Switchboard Busway
Phasing Front to Rear
400 – 4000 Amperes
136
ABCN
19.0 in.
(483 mm)
SB3 or RCIII Switchboard Busway
Phasing Left to Right
400 – 4000 Amperes
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Sentron™ Switchboards
Ground Fault Protection
7
GFS #1, is the standard location
GFS #2, alternate location for GFS
WARNING: The following should be performed only by qualified personnel as
defined in N.E.C. Article 100. The ground fault sensor (GFS), ground fault relay (GFR),
must be installed as in drawing above.
1. Disconnect Main Power Source.
2. Remove the neutral disconnect link.
Make sure the neutral is grounded
only by the main bonding jumper,
which must be on the line side of
the sensor.
3. Close all branch devices.
4. Using a “megger” type meter,
measure the resistance of the
load phase and neutral to ground.
This is to ensure that no ground
connections exist in the system.
Resistance readings of (1) Megohm
or greater are preferred.
5. Re-install the neutral disconnect link.
6. Open all branch devices.
7. Connect the main power source.
8. To Test The Entire System.
a. Check for control power.
(LED should be illuminated).
b. Press the “push to test” switch
on the relay.
c. The trip indicator should go to
the “tripped” position and the
disconnect device should operate.
d. Release the “push to test”
switch and return the trip indicator
to the “reset” position.
e. Reset or “close” the disconnect
device for normal operation of
the switchboard.
9. This test meets the requirements of
the National Electrical Code Section
230-95 (C).
Ground Fault Relay
CSI Section 16440
Siemens Electrical Products and Systems
Specification Guide
137
Sentron™
Switchboards
NEC Section 230-95 requires ground fault
protection on all service disconnects
rated 1000 amperes and larger in 600
volt class switchboards when fed by a
solidly grounded wye system of more
than 150 volts to ground. Ground fault
protection is required on 480 and 600
volt, 3-phase 3-wire, i.e., no neutral bus,
when the serving transformer is wye
connected.
There is an exception to this rule: Ground
fault protection is not required on fire
pumps or continuous industrial loads
where a non-orderly shutdown would
cause a hazard.
Health care facilities, such as, hospitals
require additional levels of ground fault
protection. These requirements are
described in NEC article 517.
In the 1990 NEC, new sections 215-10
and 240-13 were added requiring ground
fault protection on all 1000 ampere and
larger devices, breakers, and switches,
applied in a system as described above,
unless there is ground fault protection
upstream.
Many utilities use a grounded wye secondary transformer and bring a connection from the grounded midpoint to the
service section ground bar. When this
is the case, ground fault protection
is required.
For a 1000 ampere or larger 480 volt,
3-phase 3-wire service section, an inquiry
should be made to determine if the
utility is using a 3-wire delta secondary
transformer. Should this be the case,
no ground fault protection is required.
Application
Sentron™ Switchboards
Automatic Throwover System — Types SB3 and RCIII Only
Sentron™
Switchboards
7
An automatic throwover system provides
power to a common load from two or
more sources such as utility sources and
generator sources. In most systems
there is a period of time from approximately 1 to 5 seconds where the load is
completely without power as the sources
are switched. Thus it is not a “UPS”
(uninterruptable power supply) system
although most UPS systems incorporate
a transfer scheme as a part of their system. Generally, this is sufficient for most
loads other than computers which cannot
stand even a momentary outage.
Basically, the purpose for having an automatic transfer system is to provide
power to critical loads by continuously
monitoring the utility source for proper
voltage and either switching to an alternate utility source or starting and switching to an on-site generator when the
voltage fails. In more elaborate systems
other source parameters such as phase
failure, phase reversal, frequency, and
reverse power might be monitored. Also,
several sources might be used with corresponding main and tie breakers-each
source will have a main, and each pair of
mains will have a tie.
The transfer system will generally feed
only the critical load to minimize the
frame size of the breakers involved.
However, they may be located anywhere
in the distribution system and anything
may be considered “critical load”,
depending on the application and user
preference.
A two-device transfer scheme generally
consists of a normal (utility) main and an
emergency (generator) main with no tie.
The system sends a generator engine
start signal and may also have a cooldown timer, after retransfer to utility
power, as an option. If the generator fails
the time delay or retransfer to utility
power is by-passed.
A three-device transfer scheme generally
consists of two main utility breakers and
one tie breaker. Normally, the two mains
are closed and the tie is open. Upon failure of either source that main opens and
the tie closes. Upon restoration of utility
source the tie opens and the open main
closes. The breakers are electrically interlocked such that any two may be closed
at one time. Usually, no generators are
involved and in more elaborate systems,
momentary paralleling of sources may be
used. The source sensing and logic controls are very similar and may include the
phase failure, phase reversal, and undervoltage sensing. A time delay on transfer
138
to ride out momentary fluctuations, and a
time delay on re-transfer to utility to
insure that the power has stabilized, is
standard. An “auto-manual” selector
switch is provided such that the system
will operate automatically and the manual
open-close push buttons are bypassed in
“auto” and “manual”. All automatic functions are by-passed except the electrical
interlock and only the open - close pushbuttons are functioning.
This “manual” position allows for transfer under other than emergency conditions for maintenance, testing, etc. Pilot
lights located near the open - close buttons provide indications of the positions
of each breaker.
Each main source powers a control transformer and a control power selector relay
switches to whichever source is available
to insure that the system has control
power. Each control transformer has a
control power disconnect so if the system is placed in “manual”, all control
power may be shut off for work on the
control system without disturbing the
power to the load.
In the event of a short circuit or over
current condition such that one of the
Table 7.59
Application
breakers trips, the system does not
transfer to another source and if
requested, alarm contacts may be provided to energize a lockout relay and pilot
light, which must be manually reset
before the system can be returned to
normal. Remote alarm contacts are also
available if this lockout feature is
requested.
By-pass contacts are provided when
draw-out breakers are used so that the
system will function as close to normal
as possible when a breaker is drawn out.
Contacts for remote position indication
can be provided for customer use.
A transfer switch (such as ASCO,
Russelectric, etc.) accomplishes the
same purpose as a two device transfer
scheme except it generally has no
“open” position. These switches must
be closed on normal or closed on emergency — there is no middle position.
On a two device transfer scheme using
breakers, it is possible to have both
breakers open and thus isolate the load
from either source. A transfer switch
cannot be used in a standard double
ended switchboard with a tie.
Automatic Throwover Available Functions
Standard Function
Electrical interlock
Mechanical interlock
Time delay on transfer
Time delay on retransfer
Voltage sensing both sources
Phase sensing both sources
Auto-manual switch with light
Control transformers and transfer relay
Bypass contacts on drawout breakers
Engine start contacts
Bypass of retransfer if emergency fails
Open-close pushbuttons and lights
3—Breakers
2—Breakers
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Optional Function
Frequency sensing
Remote alarm/lockout contacts
Synchronization check
Current sensing
A and B auxilliary contacts
Reverse power relay
Ground fault
Phase indicating lights
Load voltage release
Time delay for engine cool down
Test switch—loss of normal
Plant exerciser
3—Breakers
2—Breakers
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Siemens Electrical Products and Systems
Specification Guide
—
✓
✓
✓
✓
✓
✓
✓
—
—
—
✓
—
—
✓
✓
✓
✓
✓
✓
✓
✓
✓
CSI Section 16440
Sentron™ Switchboards
Some Things to Consider
Applying SB1, SB2, and SB3
Switchboards
The electrical system is bound to have
unique requirements that affect the
design of the switchboard and the
selection of the protective devices that
go into it. However, some design aspects
are common to all systems, and can be
considered in more general terms.
Selective Tripping
The switchboard and its protective
devices must be capable of withstanding
and interrupting the short circuit fault
current that the electrical system can
deliver to the switchboard’s location in
the system.
In a fully rated system, both the main
and branch feeder protective devices
must have adequate interrupting capacity
for the available fault current, and the
switchboard bus should be braced for
CSI Section 16440
Circuit Breaker Selectivity
Selectivity between main and branch circuit breakers can be achieved up to the
instantaneous trip setting by building a
short-time delay into the main breaker
trip characteristics, or properly choosing
and setting instantaneous trip characteristics, to allow the branch breakers instantaneous trip to clear the fault first.
The short-time delay features are available on solid-state molded case circuit
breakers, such as Siemens Sentron™
Digital Circuit breakers, SB Encased
Systems Breakers and Type RL Low
Voltage Power Circuit Breakers. With
these breakers, a solid-state main
breaker, and standard thermal-magnetic
branch breakers can be combined to
achieve an economical selective system.
Ground Fault Protection Design
While the National Electrical Code stipulates only that ground fault protection be
provided on the main disconnect device,
the switchboard designer should consider service continuity when applying
ground fault protection. Ground fault
Siemens Electrical Products and Systems
Specification Guide
protection can be achieved using ground
fault relays, or integral ground fault in
solid-state trip circuit breakers.
Ground fault protection normally used on
main disconnect devices has a pick-up
trip from 200 to 1200 amperes, and
operating times from six to thirty cycles.
For systems in which continuity of service is critical, ground fault protection is
recommended on both the main and
branch feeder devices. For hospitals,
the National Electric Code, Section
517-13 requires this ground fault relaying
on both the main and feeder circuits.
A time coordinated scheme between the
main and branch devices will provide
selective coordination to maintain
continuity of service.
Enclosure Types
Type 1 enclosures are available for indoor
applications and Type 3R for outdoor and
wet locations.
NEC Section 384-4 requires switchboards
to be located in dedicated rooms and
spaces. Sections 384-7 and 384-8 require
placement to reduce to a minimum the
probability of communicating fire to adjacent combustible materials including the
floor. Section 110-16(a) defines specific
working clearances and exit doors to the
switchboard area.
Factory Testing
Prior to shipment each switchboard is
tested to UL 891, the dead front switchboard standard. A dielectric test is conducted at two times the switchboard
voltage rating plus 1000 volts. External
device ground fault systems are tested at
57% control voltage to ensure operation
under severe ground faults.
Note: NEC Section 230-95 requires the
ground fault system to also be field
tested by the installer and a permanent
record kept of this test using the field
test instructions provided with the
switchboard.
139
7
Sentron™
Switchboards
Ampacity and Future Load
Requirements
In addition to meeting the demands of
present loads, the switchboard should be
sized to accommodate reasonable future
load additions without major modifications. Expansion can usually be built into
the switchboard easily. The main protective device frame size or continuous current rating, and the switchboard
through-bus can be sized on the basis of
anticipated future load demand. Trip units
or fuses of lower ratings can be installed
to meet present load conditions and simply changed in the future as load
increases, up to the maximum switchboard ratings.
Most protective devices are designed to
operate continuously at 80% of their rating when installed in a switchboard.
Bolted pressure switches, power circuit
breakers, encased systems breakers, and
some molded case breakers, have been
designed for operation at 100% of their
current rating when housed in an adequately ventilated enclosure. However,
since most protective devices are tested
in a 40°C (104°F) ambient, derating may
be necessary if the operating conditions
normally exceed this temperature.
the same maximum fault current.
Without selective tripping coordination
between the main and branch protective
devices, both the main and branch device
may trip under fault conditions.
The NEC permits the application of series
rated devices in switchboards, Series
rated devices are those which have been
series tested to prove that a higher rated
upstream device will protect a lower
rated downstream device.
In the selective system, though, the main
and branch devices are selected so that
under fault condition, the branch device
normally clears the fault while the main
remains closed. Only in unusual events,
such as a fault on the main switchboard
bus, or a failure of the branch device to
operate, would the main device trip.
Service continuity is maximized by the
selective trip design.
Application
Sentron™ Switchboards
Guide Form Specifications
1. Scope
Furnish and install, as shown on the
plans, a service and distribution
switchboard as specified herein, for
the system indicated below:
앮 120 / 240V 앮 1-phase 앮 3-wire
앮 120 / 208V 앮 3-phase 앮 4-wire
앮 277 / 480V 앮 _-phase 앮 _-wire
앮 480V
앮 ____ V
Sentron™
Switchboards
7
Configuration
The switchboard enclosure shall be:
앮 NEMA 1 indoor construction
앮 NEMA 3R outdoor construction
앮 Non walk-in front accessible
앮 Non walk-in front & rear accessible
Switchboard shall be of the modular
type construction with the required
number of vertical sections bolted
together to form one metal enclosed
rigid switchboard. The sides, top and
rear shall be covered with removable
screw-on code gauge steel plates.
Switchboard shall include all protective
devices and equipment as listed on
drawings with necessary interconnections, instrumentation and control
wiring. All groups of control wires
leaving the switchboard shall be provided with terminal blocks with suitable numbering strips.
Switchboard shall be constructed in
accordance with the latest NEMA PB-2
and UL 891 standards.
2. Bus Requirements
The bus shall be 앮 tin plated aluminum, 앮 silver plated copper of
sufficient size to limit the temperature
rise to 65˚C, based on UL tests. The
bus shall be braced for 앮 50,000,
앮 65,000, 앮 75,000, 앮 100,000,
앮 200,000 amperes symmetrical and
supported to withstand mechanical
forces exerted during short circuit conditions when directly connected to a
power source having the indicated
available short circuit current. Provide a
full capacity neutral where a neutral is
indicated on the drawings.
The through bus on the end distribution section shall be extended and predrilled to allow the addition of future
sections with standard splice plates.
Ground bus and lugs shall be furnished. The ground bus shall extend
the entire length of the switchboard
and shall be firmly secured to each
vertical section.
140
3. Incoming Service
1. Underground Service:
To isolate incoming underground
service conductors, an underground
cable pull or auxiliary section shall
be used. This section shall be of
the 앮 nonbussed, 앮 bussed type
and shall be sealable per local
utility requirements. 앮 screw-type
mechanical lugs, 앮 compression
lugs to terminate, 앮 aluminum,
앮 copper cable, shall be furnished
as detailed on the plans.
2. Overhead Service:
A. Cable entry
앮 screw-type mechanical lugs
앮 compression lugs to terminate 앮 aluminum 앮 copper
cable shall be furnished as
detailed on the plans. Where
necessary provide top cable pull
box which shall be sealable per
local utility requirements.
B. Busway Entry
Switchboard to be fed by
Siemens Sentron ____ ampere
앮 copper, 앮 aluminum busway,
as detailed on plans, 앮 and
other sections of this specification. The switchboard manufacturer shall be responsible for
coordination, proper phasing and
internal bussing to the incoming
busway.
Service Section
The service section shall be designed for
the system parameters indicated in article 1.0, shall have a 앮 ____ metering
compartment per utility requirements,
앮 user metering as indicated in article
____, 앮 and shall have a main protective
device indicated in article ____.
4. Distribution Sections
(Select one of Item #B)
Bl. Switchboard Type Panel- Mounted,
Front Accessible.
Switchboard shall be of Siemens SB1
type, or approved equal. Individual
sections shall be front accessible, not
less than 20” deep, and rear of all
sections shall align. Incoming line termination, main device connection and
all bolts used to join current-carrying
parts shall be installed so as to permit
servicing from the front only so that
no rear access is required. The branch
devices shall be front removable and
panel mounted with line and load side
connections front accessible.
Siemens Electrical Products and Systems
Specification Guide
Application
B2. Switchboard Type PanelMounted Rear Accessible
Switchboard shall be of Siemens
SB2 or SB3 type, or approved equal.
Individual sections shall be front and
rear accessible, not less than 38"
deep, and both the front and rear of
all sections shall align. The branch
devices shall be front removable and
panel mounted with line and load
side connections front accessible.
The bus and main device connections shall be rear accessible.
B3. Switchboard Type Individually
Mounted, Rear Accessible
(Fixed mounted devices).
Switchboard shall be of Siemens
RCIII type, or approved equal. All
sections shall align front and rear. All
disconnect devices, main and feeders, shall be mounted individually at
the front of the switchboard and shall
be rear accessible. The load terminals of each feeder device shall be
extended by means of insulated bus
bars through the bus compartment
into the rear cable compartment.
Optional
앮 barriers shall be provided between
bus and cable compartment.
앮 barriers shall be provided between
vertical sections.
앮 barriers shall be provided between
devices and bus compartment.
앮 barriers shall be provided between
individual devices (RC III only).
B4. Switchboard Type Individually
Mounted Rear Accessible
(Insulated Case Breaker).
Switchboard shall be of Siemens
RCIII type or approved equal. All sections shall be aligned front and rear.
Insulated case breakers shall be individually mounted in their own compartments. Barriers shall be provided
at the sides and rear of each compartment and a horizontal barrier
between breakers in same vertical
section. Breaker shall be accessible
through hinged metal door on each
breaker compartment.
The insulated case circuit breaker
assembly shall be Siemens SB
Encased Systems Type, and shall be
self-contained to permit quick
replacement or inspection and
maintenance of breakers without deenergizing the entire switchboard.
CSI Section 16440
Sentron™ Switchboards
Guide Form Specifications
B4. (cont’d)
The drawout design of circuit breaker
shall be such that it makes it possible
to place the breakers in a fully withdrawn, disengaged, test or engaged
position. The load side of each
feeder breaker shall have bus bars
extending from rear of the primary
disconnect through the bus
compartment in to the rear cable
compartment.
B5. Switchboard Type Individually
Mounted Rear Accessible
(Drawout Power Circuit Breaker)
Switchboard shall be of Siemens
RCIII type or approved equal. All sections shall be aligned front and rear.
Each vertical section forming part of
switchboard lineup shall have one or
more individual breaker or instrument
compartments, a centralized main
bus compartment and a rear cabling
compartment. Drawout breakers
shall be Siemens RL Power Circuit
Breakers with Static Trip III trip unit,
and shall be individually mounted in
their own compartments. Metal barriers shall be provided at the sides and
rear of each compartment and a horizontal metal barrier between breakers in the same vertical section. The
breaker shall be accessible through a
hinged metal door on each breaker
compartment.
The drawout mechanism of power
circuit breaker shall be such that it
can be moved from connect through
test to disconnect position without
opening the door, In the “connect”
position, both the primary and secondary disconnects are engaged. In
the “test” position, the primary disconnect terminals are disengaged;
however, the secondary disconnects
are maintained to permit the operation of the circuit breaker. In the “disconnect” position, the primary and
secondary disconnects are engaged.
CSI Section 16440
Optional
앮 barriers shall be provided between
the bus and cable compartment and
between vertical sections.
앮 provide traveling type breaker
lifting hoist and track mounted on
top of switchboard.
앮 provide portable lifting device.
5. Main Protective Device
(Select one of Item #C)
The main protective device, to be
installed in the main device section,
shall be as indicated below:
C-1 Molded case circuit breaker shall
be of the quick-make, quick-break,
trip-free, (heavy duty) (extra heavy
duty) (solid state) type. It shall be
an ______ frame (2-pole) (3-pole)
600-volt breaker with a trip current rating of:
앮 400A
앮 1200A
앮 600A
앮 1600A
앮 800A
앮 2000A
앮 1000A
앮 3200A
of an interrupting capacity of not
less than ______ amperes RMS
symmetrical at the system voltage.
Siemens Electrical Products and Systems
Specification Guide
C-2 Fusible switch of the quick-make,
quick-break type. It shall be a
(2-pole) (3-pole) (240V) (600V)
Vacu-Break unit with a continuous
current rating of (400) (600) (800)
(1200) amperes and with ______
ampere class ______ fuses, suitable for application on a system
with ______ amperes symmetrical
available fault current. The following accessory features are to be
included:
앮 Shunt Trip
앮 Ground fault relay
앮 Other ______ (list)
C-3 Bolted pressure switch of the
quick-make, quick-break type.
It shall be a 앮 2-pole, 앮 3-pole,
앮 240V, 앮 480V unit with a
continuous current rating of:
앮 800A
앮 2500A
앮 1200A
앮 3000A
앮 1600A
앮 4000A
앮 2000A
and with _______ ampere Class L
fuses suitable for application on
a system with ______ amperes
symmetrical available fault
current.
The following accessory features
are to be included:
앮 Shunt Trip
앮 Ground fault relay
앮 Electrical operator
앮 Other _______ (list)
C-4 Type RL low voltage power circuit
breaker with a drawout frame and
a current rating of:
앮 600A
앮 3000A
앮 800A
앮 4000A
앮 1600A
앮 5000A
앮 2000A
It shall be 앮 manually 앮 electrically
operated power circuit breaker with
a solid-state Static-Trip Ill device and
an interrupting capacity of _______
amperes RMS symmetrical at the
system voltage.
The following accessory features
are to be included:
앮 Short time delay
앮 Integral ground fault trip
앮 Shunt trip (M.O. C / B only)
앮 Other _______ (list)
141
7
Sentron™
Switchboards
Optional:
앮 barriers shall be provided between
the bus and cable compartment and
between vertical section.
앮 provide traveling type breaker
lifting hoist and track mounted on
top of switchboard.
앮 provide portable lifting device.
In the “test” position, the primary
disconnect terminals are disengaged:
however, the secondary disconnects
are maintained to permit the operation of the circuit breaker. In the
“disconnect” position, the primary
and secondary disconnects are disengaged and separated a safe distance
from the corresponding stationary
terminals. In the “fully withdrawn”
position, both primary and secondary
contacts are disconnected and the
circuit breaker may be inspected as it
can be removed for more complete
accessibility.
The load side of each feeder breaker
shall have bus bars extending from
the rear of the primary disconnect
through the bus compartment in to
the rear cable compartment.
Application
Sentron™ Switchboards
Guide Form Specifications
Sentron™
Switchboards
7
C-5 Type SB Encased Systems insulated case circuit breaker with a
앮 stationary or 앮 drawout frame.
Frame size to be ___ ampere,
3-pole, 600V with a trip current
rating of:
앮 400A
앮 2500A
앮 600A
앮 2500A
앮 800 A
앮 3000A
앮 1000 A
앮 3500A
앮 1200A
앮 4000A
앮 1600A
앮 5000A
It shall be a 앮 manually, 앮 electrically operated breaker with a
solid state trip device, stored
energy type, trip free, an interrupting capacity of not less than
_______ amperes RMS symmetrical at the line system voltage.
The following accessory features
are to be included:
앮 Short time delay
앮 Integral ground fault trip
앮 Fault trip indicators
앮 Other ______ (list)
6. Branch Protective Devices
(Select one of Item #D)
All molded case circuit breakers,
fusible switches, insulated case circuit
breakers, bolted pressure switches,
low voltage power circuit breaker,
and / or motor starter units used as a
protective device in a branch circuit
will meet the requirements of the
appropriate paragraph below.
D-1 Molded case circuit breakers shall
be of quick-make, quick-break,
trip-free 앮 thermal magnetic type,
앮 solid-state, with frame, trip and
voltage ratings, either 2-pole or
3-pole, as indicated on the plans.
All breakers shall have an interrupting capacity of not less than
______ amperes RMS symmetrical at the system voltage All
breakers shall be removable from
the front of the switchboard without disturbing adjacent units. The
switchboard shall have space or
provisions for future units as
shown on the plans.
142
D-2 Current limiting circuit breakers
shall provide inverse time delay,
instantaneous circuit protection,
and also limit the let-through I2t to
a value less than I2 t of one-half
cycle wave of the symmetrical
prospective current without any
fusible elements, Breakers shall
have an interrupting capacity of
not less than ______ amperes
RMS symmetrical at the system
voltage.
D-3 Fusible switches shall be quickmake, quick-break units utilizing
the double-break principle of circuit rupturing to minimize arcing
and pitting and shall conform to
the ratings shown on the plans.
Each switch shall have an individual door over the front, equipped
with a voidable interlock that prevents the door from being opened
when the switch is in the ON
position unless the interlock is
purposely defeated by activation
of the voiding mechanism. All
switches shall have externally
operated handles. Switches shall
be equipped with 앮 NEC standard, 앮 Class R rejection type
fuse holders, and Class 앮 H,
앮 K1, 앮 K5, 앮 RK1, 앮 RK5,
앮 J, 앮 T and 앮 L fuses of
ampere rating and type as indicated on the plans suitable for
application on system with ______
ampere symmetrical available
fault current.
Siemens Electrical Products and Systems
Specification Guide
Specifications
D-4 Each bolted pressure switch shall
be the quick-make, quick-break
type, equipped with Class L fuses
suitable for application on a system with ______ amperes symmetrical available fault current.
Ampere ratings to be as shown
on the plans.
D-5 Each low voltage power air circuit
breaker shall be (drawout
mounted) stored energy type, trip
free, (manually operated) (electrically operated) with solid-state trip
device. Frame sizes and trip ratings to be as shown on the plans.
All breakers to have an interrupting capacity of not less than
_______ amperes symmetrical at
the rated voltage.
D-6 Each insulated case circuit breaker
shall be (drawout) (stationary)
frame. stored energy type, trip
free, (manually operated) (electrically operated) with solid- state
trip device. Frame sizes and trip
ratings to be as shown on the
plans. All breakers to have an
interrupting capacity of not less
than _______ amperes symmetrical at the rated voltage.
CSI Section 16440
Sentron™ Switchboards
Guide Form Specifications
7. Ground Fault Protection
D-7 Motor Starters (SB3
Switchboards only)
NEMA rated Siemens magnetic
starters shall be furnished of the
type and horsepower ratings as
indicated on the plans. Thermal
overload relays on starters shall
be (non-compensated bimetallic
type with selector for either auto
or manual reset) (ambient temperature compensated bimetallic type
with selector for either auto or
manual resets). Three overload
relays will be furnished on each
starter. The overload heater elements will be sized from the
actual motor nameplate data.
The following accessory features
will be furnished on each starter:
앮 Individual control power
transformers
앮 Pilot light(s)
앮 Auxiliary interlocks
앮 _______ NO _______ NC
Pushbuttons, selector switches
and other pilot devices shall be furnished as indicated on the plans.
The disconnect device shall be
mounted immediately above its
associated starter, and the unit
doors will be mechanically interlocked to prevent access without
de-energizing the unit. (The interlocking means shall be voidable
by qualified personnel.) The
disconnecting devices will be:
앮 Circuit Breakers
Type ETI molded case circuit
breakers will be furnished for
combination starter.
앮 Fusible Switches
Type VB fusible switch shall be
furnished for combination starters.
Switches will meet the requirements of Article D-3.
The disconnect shall be factory wired to
the starter unit. Wiring to be:
앮 Class 1A
앮 Class 1B
A) General
Furnish and install in the service equipment and / or switchboard Ground Fault
protection and indication equipment as
specified herein and as shown on drawings in accordance with NEC #230-95.
All parts of the systems specified shall
be UL Listed.
All new Ground Fault Protection and
Indication equipment shall be factory
installed, wired and tested by the
switchboard manufacturer.
CSI Section 16440
B) Ground Fault Relay
The Ground Fault Relay shall be a linepowered, self-contained device and shall
be designed to mount in the front panel
of the equipment in which it is installed.
The Ground Fault Relay shall be supplied
with 120 VAC control power from a
suitably rated control transformer whose
primary is connected phase-to-phase.
When control power is present, a
“Control Power” indicator shall be lit
on the relay panel.
The Ground Fault Relay shall receive a
signal from the Sensor proportional to
the magnitude of the fault current. Pickup (trip) and time delay settings shall
be incrementally adjustable 100 through
1200 amperes and 0.10 to 1 second,
respectively in various ranges.
The ground fault relay shall be provided
with an integral test panel with “push to
test” and “shunt trip bypass” pushbuttons for testing the system with or without tripping the protective device.
앮 Ground fault relays shall be zone
interlocked.
Siemens Electrical Products and Systems
Specification Guide
8. Metering Equipment
(When Required)
Provide a multi-function, high accuracy
digital power metering instrumentation
module equipped with an LCD display.
The power metering module shall provide
simultaneous measurements for current,
voltage, and power parameters. Power
meter shall be Siemens type 앮 4300
앮 4700 앮 4720 equipped with a communications port for connection to customer’s energy-management network.
9. General
The complete switchboard shall be
phosphatized and finished with light gray.
ASA-61 paint.
Each switchboard section shall have a
nameplate permanently affixed to it,
listing the following information:
Name of manufacturer
System voltage
Ampacity Type
Manufacturer’s shop order number
and date
Each section of switchboard shall bear
a UL listing mark, where qualified, and
a short circuit rating label.
In addition, the front, side, rear and top
of each switchboard section will have a
DANGER label in accordance with NEMA
Standard PB-2.
143
7
Sentron™
Switchboards
6. Branch Protective Devices (cont’d)
Specifications