POWER-ZONE® III Series 2
Low Voltage Metal-Enclosed
Drawout Switchgear
Class 6035
CONTENTS
Description
Page
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Application and General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Technical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Suggested Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Product Description
General
POWER-ZONE® III Series 2, low voltage metal-enclosed drawout switchgear is premium distribution
equipment designed to offer the user many operational security features: minimum down-time, system
selectivity, ease of maintenance, and large functional capacity.
The Types DSII (not fusible) and DSLII (fused) low voltage power circuit breakers are the primary
components of POWER-ZONE III switchgear. These circuit breakers employ a solid state tripping device
offering the latest in circuit protection.
Functional and operational advantages are:
Operational Security Features – Compartmentalized and barriered construction per ANSI C37.20.1.
Dual steel-front barriers: one as the full cell door covering the circuit breaker manual operation controls
and one as the front of the circuit breaker element covering the circuit breaker mechanism.
Minimum Down-Time – Drawout construction allows quick and simple replacement of breaker
elements. If an emergency occurs, breakers may be removed from low-priority circuits and re-installed
to serve high-priority circuits.
Ease of Maintenance – Circuit breakers are simple to inspect, adjust, and replace. They can be
withdrawn from their compartments for convenient maintenance or inspection.
Functional Capacity – Large frame sizes and high withstand rating make the DSII and DSLII low
voltage circuit breakers ideal for application on today’s high capacity distribution systems.
System Selectivity – The solid state trip devices provided on each DSII and DSLII low voltage power
breaker are field adjustable, enabling the user to attain optimum selectivity and coordination.
UL® Listing – POWER-ZONE III Series 2 switchgear can be designed and engineered to comply with
UL requirements. As an option, DSII and DSLII power circuit breakers are available with a UL listing.
Where UL coverage exists for all component material, parts and devices in a switchgear section, a UL
label can be affixed.
For Additional Information – POWER-ZONE III Series 2 switchgear is described in general but
brief terms here. More detailed and comprehensive data is also available from your local Square D
sales office.
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© 1998 Square D All Rights Reserved
Application and General Information
Ratings:
Main Bus – 5000 A maximum
120/208 to 600 Vac, 1∅3W, or 3∅4W.
Available Breakers:
DSII, DSLII-308, DSII-508, DSII-608
DSII, DSLII-516, DSII-616
DSII-620
DSII, DSLII-632
DSII, DSLII-840
DSII-850 (Forced air cooled)
800 A Frame
1600 A Frame
2000 A Frame
3200 A Frame
4000 A Frame
5000 A Frame
Applicable Standards:
Circuit Breakers:
Structures:
NEMA SG3
ANSI C37.13
ANSI C37.16
UL 1066 (Optional)
NEMA SG5
ANSI C37.20.1
ANSI C37.51
UL 1558 (Optional)
Features:
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Totally enclosed, dead front, free standing
Front and rear alignment
Covers installed with single tool, slotted hex-head screws
Removable top plate, rear panel, and side panel
Corrosion-resistant finish
Single or multiple mains
—
—
—
—
—
Individually mounted drawout circuit breakers
ANSI-rated low voltage power circuit breaker
Front accessible, rear connected
100% rated, two-step stored energy circuit breakers
800–5000 A frame
• Feeders
—
—
—
—
—
•
•
•
•
•
•
•
•
•
Individually mounted drawout circuit breakers
ANSI-rated low voltage power circuit breaker
Front accessible, rear connected
100% rated, two-step stored energy circuit breakers
800–4000 A frame
Structures are compartmentalized and barriered per ANSI C37.20.1
Provision for future extension
Increased mounting space within main and feeder sections
Bolted copper bus provided as standard up to 5000 A maximum
Dual steel-front barriers – the compartment door and the circuit breaker front panel
Ground bus with lugs
Shipment as separate switchgear section or up to a maximum of four sections
Removable lifting straps
Interrupting rating – 30 kA to 85 kA at 480 Vac (200 kA, when fused)
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© 1998 Square D All Rights Reserved
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Application and General Information
Indoor Enclosures
Compartmentalized construction:
POWER-ZONE III Series 2 low voltage drawout switchgear offers high reliability through
compartmentalized construction.
The three compartments are:
• Circuit breaker or instrument compartment.
• Bus compartment.
• Cable compartment.
Isolation between the bus and cable compartments and/or between adjacent bays is available through
optional vertical barriers.
NOTE: If incoming conductors are considered to be “Service Conductors,” then barriers as outlined in
National Electrical Code® (NEC), Article 384-3 must be specified.
The optional neutral bus is located on the innermost portion of the cable compartment, thereby allowing
easy access to line and load connectors.
Bus Riser
Instrument or Circuit Breaker Compartment
Bus Compartment
N (Optional)
Circuit Breaker Compartments
A∅
Cable Compartment
B∅
C∅
6035-98140
Figure 1:
Side View Illustration of Typical Switchgear
Outdoor Enclosures
POWER-ZONE III switchgear is available in a walk-in POWER ZONE® center enclosure for outdoor
installation. A non-walk-in enclosure is also available. Both enclosures are NEMA Type 3R as standard.
Non-walk-in enclosures are equipped with:
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•
•
•
•
Strip heaters in breaker cells and bus compartment
Front and rear lockable equipment doors with three point latching and filtered openings for ventilation
Removable gasketed steel cover plates over conduit entrance
One-piece construction for ease of installation
Options Available:
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—
—
—
Mobile floor crane to handle breaker
Top entry/exit for incoming and outgoing cables
Capability for future expansion
Interior and exterior lighting and convenience outlets
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© 1998 Square D All Rights Reserved
Application and General Information
6052-88200A
Figure 2:
POWER ZONE™ Center – Walk-In Enclosure
The POWER ZONE center–walk-in enclosure is equipped with the following standard features:
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Front aisle with steel entrance door equipped with panic hardware
Lockable rear equipment doors hinged with 3-point latching and filtered openings for air intake
Interior fluorescent lighting
Three-way light switch and convenience outlets located near the entrance door
Strip heaters in breaker cells and bus compartment
Overhead breaker lifting device (Traveling Lifter Assembly)
Removable gasketed steel cover plates over conduit entrance
One-piece construction for ease of installation
Options available:
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—
—
—
—
—
—
—
Extended aisle for additional work space
Exhaust fan ventilation/Inside temperature control
Exterior lighting
Inside emergency lighting
Wall-mounted ac distribution panel
Top entry/exit for incoming and outgoing cables
Capability for future expansion
Modified NEMA Types:
NEMA Type 4 and NEMA Type 4X
NEMA Type 7 and NEMA Type 9 for use in hazardous areas
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© 1998 Square D All Rights Reserved
11/98
Application and General Information
POWER-ZONE III Series 2 switchgear uses the Type DSII low-voltage power circuit breaker. This circuit
breaker is available in six basic frame sizes that are tabulated along with their respective interrupting
capacities on page 14. The breaker overcurrent protection consists of a solid-state, microprocessor-based trip device that requires no external power source. The complete tripping system
has three basic components: the molded sensors, the trip device (with rating plug), and the trip actuator.
The microprocessor-based trip unit uses RMS current level sensing.
Each pole of the circuit breaker is equipped with a molded sensor located on the bottom rear main
disconnect contacts. These sensors produce an output proportional to the load current. The output is
fed into the trip device, which has the intelligence and energy to operate the trip actuator when required.
The trip actuator receives the tripping pulse (from the microprocessor-based trip unit) and mechanically
trips the circuit breaker.
Type DSII circuit breakers are equipped with the controls (see Figure 4 on page 6). All circuit breakers
are fully stored energy devices with a two-step operating mechanism.
A spring charging handle charges the mechanism and the circuit breaker contacts are closed by
pushing the “Push To Close” button, which is located on the face of the circuit breaker. Electrically
operated circuit breakers have a motor to charge the stored energy mechanism, electric close feature,
and electric open feature.
(Optional) POWERLOGIC®
DIGITRIP® RMS 810D RMS Sensing
with current and energy displays
Values
PowerLogic
DIGITAL
PROTECTION
Digitrip RMS 810D
D86LSIGA
kA
Demand
IA
Peak-MW
IB
Present-MW
IC
Energy-MWh
Reset
Step
IG
Long Delay
Setting (Ir)
1.0 x In = Ir
Long Delay
Time
24 Sec.
At
6 x Ir
Digitrip RMS Rating Plug
For Use in DS Breakers Only
Cat.
Must Use With
Sensor Rated
In (Rated I) =
Hz Only
Rating plug
S1-8
S2-10
M1-8
M2-12
Battery Check
Hinge Down to Replace Battery
Short Delay
Setting
2 x Ir
Molded sensor
Gnd. Fault
Setting
K x In
Breaker Trips
At 6T & GFT
Test Amps
6T In
Short Delay
Time
.3 Sec.
2
*=I t
Trip actuator
Test
Gnd. Fault
Time
.3 Sec.
Inst.
Setting
2 x In
Trip
Reset
Unit
Status
Gnd.
Inst.
NP7829C14H41
6035-98142
Figure 3:
Tripping System
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© 1998 Square D All Rights Reserved
Application and General Information
DIGITRIP Microprocessor-Based Trip Device
(optional POWERLOGIC 810DTrip Unit illustrated)
Nameplate
Access shutter to
hex shaft (for
breaker removal)
Spring charging handle
Drawout unit
position indicator
Operations counter
(optional)
Open-Close indicator
Padlock plate
Trip plate
Close bar
Overcurrent trip
switch reset
(optional)
Spring charge indicator
6035-9818
Figure 4:
Standard DSII Circuit Breaker
DSII circuit breakers are manufactured to Square D company specifications and are fully warranted and
backed by Square D, its sales and technical service personnel.
NOTE: Square D DSII and DSLII circuit breakers are NOT interchangeable with Cutler-Hammer DSII
and DSLII circuit breakers.
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© 1998 Square D All Rights Reserved
11/98
Application and General Information
DIGITRIP® RMS 510 (Standard trip unit)
NOTE: Detailed information on features and operations on the DIGITRIP RMS 510, 610 and
POWERLOGIC® 810D trip units can be found in Instruction Bulletin 6035-510 DIGITRIP RMS Trip Units.
Standard trip features include:
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•
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•
•
RMS sensing
Integral trip unit testing
Unit status indicator
Adjustable long delay and ampere setting
Local mode of trip indicators
Rating plug
Optional features include:
•
•
•
•
Adjustable short time delay and pickup
Adjustable ground fault delay and pickup
Selectable I2t on short time and ground fault
Zone selective interlocking (only with other DSII breakers equipped with DIGITRIP trip units.)
DIGITRIP RMS 610 and the POWERLOGIC DIGITRIP RMS 810D are optional.
DIGITRIP RMS 610 (Optional)
Standard trip features include:
• All features of the RMS 510
• Local four-digit alphanumeric display
— Amperes
— Mode of trip
— Service trip messages
• Local hi-load indication
• Remote signal contacts for hi-load and mode of trip (via the auxiliary trip relay-ATR)
POWERLOGIC DIGITRIP RMS 810D (Optional)
Standard trip features include:
• All features of the RMS 510 and RMS 610
• Energy and power monitoring
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—
—
—
—
—
—
Peak demand➀
Present demand➀
Energy consumption➀
Amperes
Energy and demand information
Remote breaker operation
Service and trip messages
• Direct communications link to the Square D POWERLOGIC Power Monitoring and Control System
➀ Energy and demand are calculated in conjunction with a built-in potential transformer module.
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© 1998 Square D All Rights Reserved
Application and General Information
POWER-ZONE III Series 2 low voltage drawout switchgear is available with the
Square D POWERLOGIC circuit monitoring metering, data acquisition, and
control system.
Basic circuit information, such as amperes and energy consumption, as well as
circuit breaker remote operation, can be accomplished using the POWERLOGIC
DIGITRIP 810D trip unit. For more sophisticated metering, power quality
monitoring, data acquisition, and control, POWERLOGIC circuit monitors should
also be considered.
POWERLOGIC circuit monitors replace a variety of discrete meters, transducers,
and other components. POWERLOGIC circuit monitors perform these functions:
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•
•
6035-98143
Figure 5:
POWER-ZONE III Series 2 LV
Drawout Switchgear with
POWERLOGIC Circuit
Monitors
Meters Amperes, Volts
Frequency
Watts
Thermal Demand
Vars
Watthour with Demand
Kilovolt-ampere
Varhours
Power Factor
Waveform capture
Records data
Industry standard RS-485 data communications allow the POWERLOGIC system
to replace multiple transducers, analog wires, and analog-to-digital conversion
equipment. Extensive information can be transmitted over a single
communications cable to a POWERLOGIC system display, a personal computer,
programmable logic controller, or other host system.
In addition to its metering capabilities, the POWERLOGIC system is available with
optional status inputs and relay outputs for monitoring discrete contacts and
remote control of devices via the data communications channel.
A POWERLOGIC circuit monitor, equipped with a “waveform capture” function,
offers a highly accurate class of circuit information, not presently available on the
built in trip unit devices. Comprehensive profiles of current and voltage waveforms,
suitable for harmonics studies and other power quality analyses, are reported on
user-command.
For additional information regarding POWERLOGIC systems consult your local
Square D sales office.
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© 1998 Square D All Rights Reserved
11/98
Application and General Information
The main disconnecting contacts on the rear of the circuit breaker are spring loaded and self-aligning
to ensure positive electrical contact when the circuit breaker is in the connected position. These contacts
are designed so the pressure at the point of contact on the stationary stud becomes greater under short
circuit conditions.
The secondary disconnecting contacts are also located on the rear of the circuit breaker element and
are used for connecting the accessories to the control power source or other control circuits. These
contacts are in the “make” position when the element is in the “Connected” and “Test” positions. See
photo below.
Interphase barriers
Secondary
disconnecting contacts
Levering Arm
Main disconnecting contacts
6035-9815
Figure 6:
Rear View of DSII Circuit Breaker Element
Circuit breakers of like frame sizes and interrupting ratings are interchangeable as standard.
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© 1998 Square D All Rights Reserved
Application and General Information
POWER-ZONE III Switchgear is also available with fused power circuit breakers. Fused circuit breakers
have a short circuit interrupting fusing of 200,000 A symmetrical. The circuit breaker element, including
the microprocessor-based tripping system, is identical to that of a non-fusible circuit breaker except
for the addition of the fuses and other circuitry necessary for the proper functioning of the fuse
protection system.
Current limiting fuses are available on the 800 A, 1600 A, 3200 A, and 4000 A frame power circuit
breakers. The current limiting fuses are mounted integrally on the rear of the circuit breaker element for
the 800 A and 1600 A frame sizes and are mounted on a separate drawout truck for the 3200 A and
4000 A frame sizes. When fuses are mounted on a separate fuse truck, the drawout mechanisms are
mechanically key interlocked with the circuit breaker element. The Square D 3200 A and 4000 A fused
circuit breaker design permits mounting both the fuse drawout truck and circuit breaker element in the
same vertical section (see Figure 7.)
All versions of the fused circuit breaker are equipped with blown fuse indication and anti-single phasing
as standard.
Fused circuit breakers of like frame sizes are interchangeable as standard.
6035-9801
Figure 7:
Two Bay POWER-ZONE III Series 2 Switchgear with DSLII 840 Shown
with Optional Lifter Assembly
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© 1998 Square D All Rights Reserved
11/98
Application and General Information
Blown fuse indicators
(standard)
6035-9816
Figure 8:
Front View of DSLII Circuit Breaker
Fuses
6035-98123
Figure 9:
Rear View of DSLII Circuit Breaker Equipped with Integral Current Limiting Fuses
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© 1998 Square D All Rights Reserved
Application and General Information
Test and Maintenance Option
All Type DSII and DSLII power circuit breakers equipped with microprocessor-based trip devices have
a built-in test feature, as well as plug-in type test facilities that enable the user to test all tripping
functions.
The DSII circuit breaker test cart provides mobility for moving circuit breakers to the test area, a
convenient height for visual inspection of circuit breakers, contacts for testing all secondary control
functions, means for verification of mechanical operation, and a test equipment shelf for mounting the
test kit.
Secondary Control Contacts
Stationary Contacts - Line Side
Stationary Contacts - Load Side
Circuit Breaker Cradle
Electrical Operation Control Panel
Storage Shelf for Test Equipment
6035-8726
Figure 10: Test Cart
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© 1998 Square D All Rights Reserved
11/98
Application and General Information
Miscellaneous Circuit Breaker Options and Accessories
• DIGITRIP 610 and POWERLOGIC 810D trip units
• Shunt trip for manually operated circuit breakers
• Auxiliary switch with four 10 A contacts. A maximum of ten 10 A contacts can be supplied per
circuit breaker.
• Cell switch with 6 Form “A” and 6 Form “B”. Operates when circuit breaker is drawn from connected
to test position.
• Undervoltage trip–instantaneous or time delay type. Trips the circuit breaker on 30-60%
undervoltage.
• Overcurrent trip switch operates and latches when circuit breaker is automatically tripped on overload
or fault conditions.
• Electric lockout for manually operated circuit breakers
• Electric close release for manually operated circuit breakers
• Key interlocks
• Operations counter
• AC capacitor trip
• Integral ground fault sensing
• Insulated switchgear bussing
• UL Label
A rail-mounted traveling type circuit breaker lifting device is optionally available with indoor type
switchgear. It is supplied as standard with outdoor walk-in enclosures.
6035-98134a
Figure 11: Circuit Breaker Lifting Device
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© 1998 Square D All Rights Reserved
Technical Overview
Ratings
6035-98135
Interrupting Ratings of Type DSII Circuit Breaker (RMS Symmetrical Amperes)
Trip Current
Range
Circuit
Breaker
Type
With Instantaneous Trip
50-800
50-800
50-800
50-1600
50-1600
50-2000
800-3200
1000-4000
1600-5000
DSII-308
DSII-508
DSII-608
DSII-516
DSII-616
DSII-620
DSII-632
DSII-840
DSII-850➀
50-800
50-1600
800-3200
1000-4000
DSLII-308
DSLII-516
DSLII-632
DSLII-840
With Short Delay Trip
208-240V
480V
600V
208-240V
480V
600V
42,000
65,000
65,000
65,000
65,000
65,000
85,000
130,000
130,000
30,000
50,000
65,000
50,000
65,000
65,000
65,000
85,000
85,000
30,000
42,000
50,000
42,000
50,000
50,000
65,000
85,000
85,000
30,000
50,000
65,000
50,000
65,000
65,000
65,000
85,000
85,000
30,000
50,000
65,000
50,000
65,000
65,000
65,000
85,000
85,000
30,000
42,000
50,000
42,000
50,000
50,000
65,000
85,000
85,000
All Ranges: 200,000
Available Sensors
Available Rating Plugs
Circuit Breaker Type
Sensor Rating (Amperes)
DSII-308, DSLII-308,
DSII-508, DSII-608
DSII-516, DSLII-516, DSII-616
Sensor Rating Amperes
Plug Rating in Amperes
200, 300, 400, 600, 800
200
100, 200
200, 300, 400, 600, 800, 1200, 1600
300
200, 250, 300
DSII-620
200, 300, 400, 600, 800, 1200, 1600, 2000
400
200, 250, 300, 400
DSII-632
2400, 3200
600
300, 400, 600
DSII-840
4000
800
400, 600, 800
DSII-850➀
5000
1200
600, 800, 1000, 1200
➀
DSII-850 - Forced air cooled.
1600
800, 1000, 1200, 1600
2000
1000, 1200, 1600, 2000
2400
1600, 2000, 2400
3200
1600, 2000, 2400, 3000, 3200
4000
2000, 2400, 3200, 4000
5000
3200, 4000, 5000
Digitrip RMS Adjustable Trip Settings
Time/Current
Characteristic
➀
Pick-Up Setting
Pick-Up Point ➀
Time Band, Seconds
2, 4, 7, 10, 12, 15, 20, 24
(at 6 times pick-up value)
Long Delay
0.5, 0.6, 0.7, 0.8, 0.85, 0.9, 0.95, 1.0
In Times Long Delay Setting
Instantaneous
2, 2.5, 3, 4, 5, 6 M1=8, M2=12
In Times Instantaneous Setting
Short Delay
2, 2.5, 3, 4, 5, 6 S1=8, S2=10
Ir Times Short Delay Setting
0.1, 0.2, 0.3, 0.4, 0.5 (Flat Response)
0.1*, 0.3*, 0.5 *(I2t Response)
Ground Fault
A (.25), B (.3), C (.35), D (.4), E (.5),
F (.6), H (.75), K (1.0) (1200A Max.)
In Times Ground Fault Setting
0.1, 0.2, 0.3, 0.4, 0.5 (Flat Response)
0.1*, 0.3*, 0.5 *(I2t Response)
In = Rating Plug Valve
Ir = Long Delay Pickup Setting X In
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© 1998 Square D All Rights Reserved
11/98
Technical Overview
1000
900
800
1000
900
800
700
700
Available long delay (Ir) settings
.5, .6, .7, .8, .85, .9, .95, or 1 x In = Ir
600
500
400
400
300
300
200
200
Maximum total
clearing time
150
150
100
90
80
100
90
80
70
70
60
60
50
50
40
40
30
30
Minimum total
clearing time
➀ The Rating Plug is for 50 and 60 Hz applications.
➁ Curves apply from -20 °C to +55 °C ambient. Temperatures above 95 °C cause
automatic trip.
➂ With zone interlocking on short delay utilized and no restraining signal, the minimum
time band SDM applies – regardless of setting.
➃ Long Time Memory function automatically shortens long delay time as overload
conditions recur.
800
900
1000
700
600
500
400
3
4
2
2
2
2
1.5
1
.9
.8
2
10
S2
5
3
1.5
Available
short delay
settings
2, 2.5, 3, 4, 5, 6,
S1(8) or S2(10) x Ir
Time in seconds
6
300
4
4
200
5
150
6
80
90
100
7
70
15
Available
long
10
delay
9
time
8
settings 7
shown
6
@ 6 x Ir ➃
5
2, 4, 7,
10, 12,
4
15, 20, 24
7
2.5
Notes:
20
24
10
9
8
3
Tolerances ➁
LDS Range = 90% to 110% of setting
LDT Range = 67% to 100% of setting shown at 6 x Ir
SDS Range = 90% to 110% of setting
60
15
100, 200
200, 250, 300
200, 250, 300, 400
300, 400, 600
400, 600, 800
600, 800, 1000, 1200
800, 1000, 1200, 1600
1000, 1200, 1600, 2000
1600, 2000, 2400
1600, 2000, 2400, 3000, 3200
2000, 2400, 3200, 4000
3200, 4000, 5000
50
20
➀
Plug Rating in Amperes (In)
200
300
400
600
800
1200
1600
2000
2400
3200
4000
5000
40
500
Sensor Rating
Amperes
30
600
Time in seconds
20
15
8
9
10
7
6
5
4
3
Available DIGITRIP RMS Rating Plugs Marked 50/60 Hz
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
.15
.08
.09
.1
.07
.06
.05
Current in multiples of the long delay setting Ir
1
.9
.8
.7
.7
.6
.5
.6
6
4
2.5
8
S1
.5* ➂
.4
.5
➂
.5
.4
.4 ➂
.3
.3* ➂
Available flat response
short delay time settings
.1, .2, .3, .4, .5 second
.3 ➂
.2
.3
.2
.2 ➂
.15
.15
.1
.09
.08
.1* ➂
Available
I2t shape on
short delay
time settings
indicated by *
.07
.06
.05
SDM
Application
determines
end of curve
.1 ➂
.1
.09
.08
.07
.06
.05
.04
.04
.03
.03
Current in multiples of the long delay setting Ir
800
900
1000
700
600
500
400
300
200
150
80
90
100
70
60
50
40
30
20
15
8
9
10
7
6
5
4
3
2
20
1.5
15
8
9
10
7
6
5
4
.01
3
.01
2
.015
.06
.02
.05
.02
.015
44024-431-R1
Figure 12: Typical Long Delay and Short Delay Time-Phase Current Characteristic Curve (LS) for Types DSII and DSLII
Circuit Breakers with DIGITRIP RMS 510/610/POWERLOGIC 810D
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© 1998 Square D All Rights Reserved
Technical Overview
20
15
8
9
10
7
6
5
4
3
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
.15
.08
.09
.1
.07
.06
.05
Current in multiples of plug rating In
Available DIGITRIP RMS Rating Plugs Marked 50/60 Hz
1000
900
800
1000
900
800
700
700
600
600
500
500
400
400
300
300
200
200
150
150
Sensor Rating
Amperes
➀
Plug Rating in Amperes (In)
200
300
400
600
800
1200
1600
2000
2400
3200
4000
5000
100, 200
200, 250, 300
200, 250, 300, 400
300, 400, 600
400, 600, 800
600, 800, 1000, 1200
800, 1000, 1200, 1600
1000, 1200, 1600, 2000
1600, 2000, 2400
1600, 2000, 2400, 3000, 3200
2000, 2400, 3200, 4000
3200, 4000, 5000
Tolerances ➁
INST Range = 90% to 110% of setting
7
6
6
5
5
4
4
800
900
1000
7
700
10
9
8
600
10
9
8
500
15
400
20
15
300
20
200
30
150
40
30
80
90
100
50
40
70
60
50
60
70
60
50
70
➀ The Rating Plug is for 50 and 60 Hz applications.
➁ Curves apply from -20 °C to +55 °C ambient. Temperatures above 95 °C cause
automatic trip.
40
100
90
80
30
100
90
80
3
3
2
2
1.5
1.5
1
.9
.8
.7
.7
Available instantaneous settings
2, 2.5, 3, 4, 5, 6, M1(8) or M2(12) x In
.6
1
.9
.8
5
3
2
Time in seconds
Time in seconds
Notes:
2.5
4
.6
6
.5
.5
8
M1
.4
.4
.3
.3
.2
.2
12
.15
.15
M2
.1
.09
.08
.1
.09
.08
.07
.07
.06
.06
.05
.05
.04
.04
Application
determines
end of curve
.03
.03
Current in multiples of plug rating In
800
900
1000
700
600
500
400
300
200
150
80
90
100
70
60
50
40
30
20
15
8
9
10
7
6
5
4
3
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
.15
.01
.08
.09
.1
.01
.07
.015
.06
.02
.05
.02
.015
44024-430-R1
Figure 13: Typical Instantaneous Time-Phase Current Characteristic Curve (I) for Types DSII and DSLII Circuit Breakers
with DIGITRIP RMS 510/610/POWERLOGIC 810D
16
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Ground Fault Settings (Amperes) ➀ ➂ ➃
8
9
10
1000
900
800
1000
900
800
700
700
600
A
500
Available
ground fault
settings (typical).
For exact values
and tolerances of
letter codes, see chart.
K
400
300
Code
A➁
B➁
C➁
D➁
100
25
30
35
40
600
200
50
60
70
80
100
120
150
200
500
250
63
75
88
100
125
150
188
250
400
300
75
90
105
120
150
180
225
300
400
100
120
140
160
200
240
300
400
600
150
180
210
240
300
360
450
600
800
200
240
280
320
400
480
600
800
1000
250
300
350
400
500
600
750
1000
1200
300
360
420
480
600
720
900
1200
1600
400
480
560
640
800
960
1200
1200
2000
500
600
700
800
1000
1200
1200
1200
2400
600
720
840
960
1200
1200
1200
1200
3200
800
960
1120
1200
1200
1200
1200
1200
4000
1000
1200
1200
1200
1200
1200
1200
1200
5000
1200
1200
1200
1200
1200
1200
1200
1200
In plug ratings available
7
6
5
4
3
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
.15
.08
.09
.1
.07
.06
.05
Current in multiples
of plug rating
In RATING In
CURRENT
IN MULTIPLES
OF PLUG
300
200
200
150
150
100
90
80
100
90
80
70
70
60
60
50
50
40
40
E
F
50
60
H
K
75
100
8
9
10
7
4
6
5
4
5
5
➄ Curves apply from -20 °C to +55 °C ambient; temperatures above 95 °C cause
automatic trip.
➅ With zone interlocking on ground fault utilized and no restraining signal, the
minimum time band GDM applies – regardless of setting.
4
6
3
7
6
➃ All tabulated values are based on the use of a residual sensing scheme with the
same rated current sensor in all phase and neutral conductors.
2
7
➂ The Rating Plug is for 50 and 60 Hz applications.
1.5
10
9
8
.8
.9
1
10
9
8
.7
15
.6
15
➁ For Testing Purposes Only: When using an external single phase current source
to check low level ground fault current settings, it is advisable to use the
Auxiliary Power Module (APM). See TEST PROCEDURES in Instruction Leaflet.
.5
20
.4
20
➀ Except as noted, tolerances on current levels are ±10% of values shown in
chart.
.3
30
.2
30
3
3
D
2
2
B
1.5
1
.9
.8
1.5
I2t shape for
ground fault
time delay
settings indicated by *
A
TIME
INinSECONDS
Time
seconds
TIME
INseconds
SECONDS
Time in
Notes:
1
.9
.8
.7
.7
.6
.6
.5
.5
.5
➅
.5 ➅
.4
.4
.4
➅
.3
.3
.2
.2
➅
➅
Available
ground fault
time delay
settings
flat response
Available
ground fault
time delay
settings
I2t shape
.3* ➅
.3
.2
.15
.15
GDM
.1
.09
.08
.1
.1* ➅
.1
.09
.08
➅
.07
.07
.06
.06
.05
.05
.04
.04
.03
.03
CURRENT IN MULTIPLES OF PLUG RATING In
Current in multiples of plug rating In
8
9
10
7
6
5
4
3
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
8
9
10
7
6
5
4
3
2
1.5
.8
.9
1
.7
.6
.5
.4
.3
.2
.15
.01
.08
.09
.1
.01
.07
.015
.06
.02
.05
.02
.015
44024-432-R1
Figure 14: Typical Ground Fault/Protection Time-Phase Current Characteristic Curve (G) for Types DSII and DSLII Circuit
Breakers with DIGITRIP RMS 510/610/POWERLOGIC 810D
17
11/98
© 1998 Square D All Rights Reserved
Technical Overview
DSL circuit breakers are equipped with limiters having characteristics as illustrated in curves
A (Figure 15 on page 19) through E (Figure 20 on page 24). Fuse limiters are used where fault currents
exceed the interrupting capacity of the circuit breaker alone. The let-through and I2T characteristics of
the limiters are coordinated with the circuit breaker elements to allow safe application on circuits that
have available fault currents up to 200,000 RMS symmetrical amperes.
Selection of the proper limiter size depends upon whether the function of the limiter is to protect
downstream equipment or to protect the circuit breaker. If downstream equipment protection is the main
criterion, the smallest available limiter should be selected. Due to coordination problems, selection of
certain small limiters may cause nuisance blowing on overloads or low-level short circuits. For protection
of the circuit breaker only, the largest available limiter should be selected.
The table below lists available limiter ratings for DSLII-308 and DSLII-516 circuit breakers.
Circuit Breaker Type
Sensor Rating
Amperes
DSLII-308
Limiter Rating, Amperes
Minimum •
Recommended ➁
Maximum ➂
50 or 100
150
1200
2000
DSLII-308
150
200
1200
2000
DSLII-308
200
250
1200
2000
DSLII-308
300
400
1200
2000
DSLII-308
400
600
1200
2000
DSLII-308
600
800
1200
2000
DSLII-308
800
1200
1200
2000
DSLII-516
600
800
2000
3000
DSLII-516
800
1000
2000
3000
DSLII-516
1200
2000
2500
3000
DSLII-516
1600
3000
3000
3000
• For use only when protection of downstream equipment is required. Not completely coordinated with circuit breaker to avoid
nuisance blowing.
➁ Lowest rating that can be coordinated with circuit breaker to minimize nuisance blowing.
➂ Highest available ratings, for protection of circuit breaker only.
Limiters are mounted in separate trucks for the DSLII-632 and DSLII-840 circuit breakers. Three sizes, 2500, 3000, and
4000 A capacity, are available for DSLII-632. Four sizes, 2500, 3000, 4000, and 5000 A capacity, are available for DSLII-840.
18
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Curve A
8000
9000
10000
7000
6000
5000
4000
3000
2000
800
900
1000
700
600
500
400
300
200
80
90
100
70
60
50
40
30
20
8
9
10
7
1000
900
800
1000
900
800
700
700
600
600
500
500
400
400
300
300
200
200
1600
2000
1200
800
600
400
300
250
200
150
LIMITER AMPERE RATING
100
90
80
100
90
80
70
70
60
60
50
50
.05
.04
.04
.03
.03
.02
.02
.01
.01
8000
9000
10000
.06
.05
7000
.07
.06
6000
.1
.09
.08
.07
5000
.1
.09
.08
4000
.2
3000
.2
2000
.3
800
900
1000
.4
.3
700
.5
.4
600
.6
.5
500
.7
.6
400
.7
300
1
.9
.8
200
1
.9
.8
80
90
100
2
70
2
60
3
50
4
3
40
5
4
30
6
5
20
7
6
8
9
10
7
7
10
9
8
6
10
9
8
5
20
4
20
3
30
2
40
30
1
40
TIME IN SECONDS
TIME IN SECONDS
6
5
4
3
2
1
SCALE X 100 = CURRENT IN AMPERES
SCALE X 100 = CURRENT IN AMPERES
44025-793-R1
Figure 15: Type DSLII-308 Limiters: Average Melting Time and Current Characteristics
19
11/98
© 1998 Square D All Rights Reserved
Technical Overview
Curve B
400,000
300,000
200,000
1600
1200
80,000
800
70,000
60,000
E
C
600
U
50,000
D
O
40,000
N
PR
A
IT
C
400
U
C
30,000
300
IR
T
C
250
EN
200
150
R
R
20,000
U
K
AMPERE RATING
MAXIMUM PEAK LET-THROUGH CURRENT (AMPERES)
2000
100,000
90,000
C
A
M
PE
U
M
XI
A
M
10,000
9000
8000
7000
6000
5000
4000
3000
2000
200,000
90,000
100,000
80,000
70,000
60,000
50,000
40,000
30,000
20,000
9000
10,000
8000
7000
6000
5000
4000
3000
2000
1000
1000
AVAILABLE CURRENT (RMS SYMMETRICAL AMPERES)
44025-796-R1
Figure 16: Type DSLII-308 Limiters: Let-through Characteristics
20
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Curve C
8000
9000
10000
7000
6000
5000
4000
3000
2000
800
900
1000
700
600
500
400
300
200
80
90
100
70
60
50
40
30
20
8
9
10
7
6
5
4
3
2
1
SCALE X 100 = CURRENT IN AMPERES
1000
900
800
1000
900
800
700
700
600
600
500
500
400
400
300
300
200
200
3000
2000
2500
1600
1200
1000
100
90
80
100
90
80
70
70
60
60
50
50
.03
.02
.02
.01
.01
8000
9000
10000
.04
.03
7000
.05
.04
6000
.06
.05
5000
.07
.06
4000
.1
.09
.08
.07
3000
.1
.09
.08
2000
.2
800
900
1000
.2
700
.3
600
.4
.3
500
.5
.4
400
.6
.5
300
.7
.6
200
1
.9
.8
.7
80
90
100
1
.9
.8
70
2
60
2
50
3
40
4
3
30
5
4
20
6
5
8
9
10
7
6
7
10
9
8
7
6
10
9
8
5
20
4
20
3
30
2
40
30
1
40
TIME IN SECONDS
TIME IN SECONDS
800
LIMITER AMPERE RATING
SCALE X 100 = CURRENT IN AMPERES
44025-794-R2
Figure 17: Type DSLII-516 Limiters: Average Melting Time and Current Characteristics
21
11/98
© 1998 Square D All Rights Reserved
Technical Overview
Curve D
400,000
300,000
200,000
2500
2000
MAXIMUM PEAK LET-THROUGH CURRENT (AMPERES)
1600
100,000
90,000
1200
80,000
1000
70,000
800
AMPERE RATING
3000
60,000
E
C
U
50,000
D
O
40,000
N
PR
A
IT
C
U
C
30,000
IR
T
C
EN
R
R
20,000
U
K
C
A
M
PE
U
M
XI
A
M
10,000
9000
8000
7000
6000
5000
4000
3000
2000
AVAILABLE CURRENT (RMS SYMMETRICAL AMPERES)
200,000
80,000
90,000
100,000
70,000
60,000
50,000
40,000
30,000
20,000
9000
10,000
8000
7000
6000
5000
4000
3000
2000
1000
1000
44025-797-R1
Figure 18: Type DSLII-516 Limiters: Let-through Characteristics
22
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Curve E
1000
900
800
8000
9000
10000
7000
6000
5000
4000
3000
2000
800
900
1000
700
600
500
400
300
200
80
90
100
70
60
50
40
30
20
8
9
10
7
6
5
4
3
2
1
SCALE X 100 = CURRENT IN AMPERES
1000
900
800
5000
600
4000
2500
3000
LIMITER AMPERE RATING
700
700
600
500
500
400
400
300
300
200
200
100
90
80
100
90
80
70
70
60
60
50
50
40
40
30
30
20
20
10
9
8
10
9
8
7
.01
8000
9000
10000
.01
7000
.02
6000
.02
5000
.03
4000
.04
.03
3000
.05
.04
2000
.06
.05
800
900
1000
.07
.06
700
.07
600
.1
.09
.08
500
.1
.09
.08
400
.2
300
.2
200
.3
80
90
100
.4
.3
70
.5
.4
60
.6
.5
50
.7
.6
40
1
.9
.8
.7
30
1
.9
.8
20
2
8
9
10
2
7
3
6
3
5
4
4
4
3
5
2
6
5
1
6
TIME IN SECONDS
TIME IN SECONDS
7
SCALE X 100 = CURRENT IN AMPERES
44025-795-R2
Figure 19: Types DSLII-632 and DSLII-840 Limiters: Average Melting Time and Current
Characteristics
23
11/98
© 1998 Square D All Rights Reserved
Technical Overview
Curve F
400,000
5000
300,000
4000
200,000
MAXIMUM PEAK LET-THROUGH CURRENT (AMPERES)
2500
100,000
90,000
80,000
70,000
AMPERE RATING
3000
60,000
E
C
U
50,000
D
O
40,000
N
PR
A
IT
C
U
C
30,000
IR
T
C
EN
R
R
20,000
U
K
C
EA
M
P
U
M
XI
A
M
10,000
9000
8000
7000
6000
5000
4000
3000
2000
200,000
90,000
100,000
80,000
70,000
60,000
50,000
40,000
30,000
20,000
9000
10,000
8000
7000
6000
5000
4000
3000
2000
1000
1000
AVAILABLE CURRENT (RMS SYMMETRICAL AMPERES)
44025-798-R2
Figure 20: Types DSLII-632 and DSLII-840 Limiters: Let-through Characteristics
24
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Application of Type DSII Air Circuit Breakers
With Standard Three-Phase Transformers–Fluid Filled and Ventilated Dry Types
Transformer Base
(100%) Rating
kVA and
Percent
Impedance
Amperes
➀
Secondary Short-Circuit Currents
RMS Symmetrical Amperes
Max. Short Circuit
kVA Available
from Primary
System
Through
Transformer
Only
Motor
Contribution
Combined
1700
16600
17400
17700
18000
18200
18400
2800
25900
28000
28800
29500
30000
30600
4200
32900
36200
37500
38600
39400
40400
5600
41500
46800
48900
50800
52300
53900
2900
15800
16500
16800
17000
17200
17300
4800
24800
26700
27300
27900
28400
28900
7200
32100
35000
36100
37000
37800
38600
9600
40600
45200
47100
48700
50000
51400
Minimum Size Circuit Breakers
for Selective Trip Systems
Main
Feeder Circuit
Circuit Breaker Breaker Short
Short Delay Trip
Delay Trip
Feeder
Circuit Breaker
Instantaneous
Trip
208 V Three-Phase – 50% Motor Load
300
5.0%
500
5.0%
750
5.75%
1000
5.75%
833
50000
100000
150000
250000
500000
Unlimited
14900
15700
16000
16300
16500
16700
1389
50000
100000
150000
250000
500000
Unlimited
23100
25200
26000
26700
27200
27800
2083
50000
100000
150000
250000
500000
Unlimited
28700
32000
33300
34400
35200
36200
2778
50000
100000
150000
250000
500000
Unlimited
35900
41200
43300
45200
46700
48300
DSII-516
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-516 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-508
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-632
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-632 ➁
DSII-508
DSII-508
DSII-508
DSII-608
DSII-608
DSII-608
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-308 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-516 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-620 ➁
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-632 ➁
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-608
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
240 V Three-Phase – 100% Motor Load
300
5.0%
500
5.0%
750
5.75%
1000
5.75%
➀
➁
722
50000
100000
150000
250000
500000
Unlimited
12900
13600
13900
14100
14300
14400
1203
50000
100000
150000
250000
500000
Unlimited
20000
21900
22500
23100
23600
24100
1804
50000
100000
150000
250000
500000
Unlimited
24800
27800
28900
29800
30600
31400
2406
50000
100000
150000
250000
500000
Unlimited
31000
35600
37500
39100
40400
41800
At transformer self-cooled rating.
Next larger frame size main circuit breaker may be required for 55/65 °C rise and/or forced air-cooled (FA) transformer. Check Transformer Secondary
Ampere Rating.
25
11/98
© 1998 Square D All Rights Reserved
Technical Overview
Application of Type DSII Air Circuit Breakers
With Standard Three-Phase Transformers Fluid Filled and Ventilated Dry Types
Transformer Base
(100%) Rating
kVA and
Percent
Impedance
Amperes
➀
Secondary Short-Circuit Currents
RMS Symmetrical Amperes
Max. Short Circuit
kVA Available
from Primary
System
Through
Transformer
Only
Motor
Contribution
Combined
2400
12400
13300
13700
14000
14200
14400
3600
16000
17500
18000
18500
18900
19300
4800
20300
22600
23500
24400
25000
25700
7200
27800
32100
33900
35600
37000
38600
9600
34300
40600
43600
46300
48700
51400
12000
40000
48500
52500
56600
60100
64300
14000
44700
55200
60600
65900
70800
76800
18000
52000
65500
72700
80200
87400
96500
Minimum Size Circuit Breakers
for Selective Trip Systems
Feeder
Main
Circuit Breaker
Circuit Breaker
Short Delay
Short Delay Trip
Trip
Feeder
Circuit Breaker
Instantaneous
Trip
480 V Three-Phase – 100% Motor Load
500
5.0%
750
5.75%
1000
5.75%
1500
5.75%
2000
5.75%
2500
5.75%
3000
5.75%
3750
5.75%
➀
➁
601
50000
100000
150000
250000
500000
Unlimited
10000
10900
11300
11600
11800
12000
902
50000
100000
150000
250000
500000
Unlimited
12400
13900
14400
14900
15300
15700
1203
50000
100000
150000
250000
500000
Unlimited
15500
17800
18700
19600
30200
20900
1804
50000
100000
150000
250000
500000
Unlimited
20600
24900
26700
28400
29800
31400
2406
50000
100000
150000
250000
500000
Unlimited
24700
31000
34000
36700
39100
41800
3008
50000
100000
150000
250000
500000
Unlimited
28000
36500
40500
44600
48100
52300
3609
50000
100000
150000
250000
500000
Unlimited
30700
41200
46600
51900
56800
62800
4511
50000
100000
150000
250000
500000
Unlimited
34000
47500
54700
62200
69400
78500
DSII-308 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-516
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-516 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-620 ➁
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-632 ➁
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-608
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-608
DSII-632 ➁
DSII-508
DSII-508
DSII-608
DSII-608
DSII-608
DSII-608
DSII-508
DSII-508
DSII-608
DSII-608
DSII-608
DSII-608
DSII 840 ➁
DSII-508
DSII-608
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSII-508
DSII-608
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSII-850
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSLII-308
At transformer self-cooled rating.
Next larger frame size main circuit breaker may be required for 55/65 °C rise and/or forced air-cooled (FA) transformer. Check Transformer Secondary
Ampere Rating.
26
© 1998 Square D All Rights Reserved
11/98
Technical Overview
Application of Type DSII Air Circuit Breakers
With Standard Three-Phase Transformers Fluid filled and Ventilated Dry Types
Transformer Base
(100%) Rating
kVA and
Percent
Impedance
Amperes
➀
Secondary Short-Circuit Currents
RMS Symmetrical Amperes
Max. Short Circuit
kVA Available
from Primary
System
Through
Transformer
Only
Motor
Contribution
Combined
1900
9900
10600
10900
11200
11300
11500
2900
12900
14000
14500
14800
15100
15500
3900
16300
18200
18900
19500
30100
20600
5800
22300
25800
27200
28500
29700
30900
7700
27400
32500
34900
37100
39000
41200
9600
32000
38800
42000
45200
48100
51400
11500
36100
44500
48800
53000
57000
61700
14400
41600
52400
58100
64200
69900
77200
Minimum Size Circuit Breakers
for Selective Trip Systems
Main
Feeder Circuit
Circuit Breaker Breaker Short
Short Delay Trip
Delay Trip
Feeder
Circuit Breaker
Instantaneous
Trip
600 V Three-Phase – 100% Motor Load
500
5.0%
750
5.75%
1000
5.75%
1500
5.75%
2000
5.75%
2500
5.75%
3000
5.75%
3750
5.75%
➀
➁
481
50000
100000
150000
250000
500000
Unlimited
8000
8700
9000
9300
9400
9600
722
50000
100000
150000
250000
500000
Unlimited
10000
11100
11600
11900
12200
12600
962
50000
100000
150000
250000
500000
Unlimited
12400
14300
15000
15600
16200
16700
1443
50000
100000
150000
250000
500000
Unlimited
16500
20000
21400
22700
23900
25100
1924
50000
100000
150000
250000
500000
Unlimited
19700
24800
27200
29400
31300
33500
2406
50000
100000
150000
250000
500000
Unlimited
22400
29200
32400
35600
38500
41800
2886
50000
100000
150000
250000
500000
Unlimited
24600
33000
37300
41500
45500
50200
3608
50000
100000
150000
250000
500000
Unlimited
27200
38000
43700
49800
55500
62800
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSLII-308 ➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-516
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSLII-516➁
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-508
DSII-308
DSII-308
DSII-308
DSII-308
DSII-308
DSII-508
DSII-602 ➁
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-308
DSII-508
DSII-508
DSII-508
DSII-508
DSII-508
DSII-632 ➁
DSII-508
DSII-508
DSII-508
DSII-608
DSII-608
DSLII-308
DSII-508
DSII-508
DSII-508
DSII-608
DSII-608
DSLII-308
DSII-632 ➁
DSII-508
DSII-608
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSII-508
DSII-608
DSII-608
DSLII-308
DSLII-308
DSLII-308
DSII-840 ➁
DSII-508
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSII-508
DSLII-308
DSLII-308
DSLII-308
DSLII-308
DSLII-308
At transformer self-cooled rating.
Next larger frame size main circuit breaker may be required for 55/65 °C rise and/or forced air-cooled (FA) transformer. Check Transformer Secondary
Ampere Rating.
27
11/98
© 1998 Square D All Rights Reserved
Dimensions
Layout
Approximate Dimensions–Not for Construction
Top conduit entrance
29.0
737
17.0
432
F
2.5
64
D
2.5
64
2.5
64
F
2.5
64
2.5
64
Front
2.5
64
2.5
64
5.5
140
2.5
64
Front
Figure 2
Tie
Section
Figure 4
Instrument
or Blank
Panel
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
Front elevations
B
Auxiliary
Section
A
DSII-516
DSII-616
DSLII-516
DSII-620
Main
91.50
2324
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
22.0
559
22.0
559
C
D
22.0
559
17.0
432
29.0
737
17.0
432
2.5
64
Front
2.5
64
3.5
89
H
2.5
64
2.5
64
Front
B
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
34.0
864
89
B
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
22.0
559
3.5
A
Tie
DSII-308
DSII-508
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
C
H
2.5
64
Front
A
Auxiliary
Section
2.5
64
Transformer Conn.
Section
Figure 3
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
Transition
or
2.5
64
F
Front
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
Transition
or
2.5
64
F
8.0
203
2.5
64
Figure 1A
17.0
432
2.5
64
F
Front
Figure 1
17.0
432
17.0
432
D
D
17.0
432
3.5
89
H
C
2.5
64
17.0
432
3.5
89
H
2.5
64
89
2.5
64
2.5
64
Front
3.5
H
2.5
64
Front
2.5
64
Front
Bottom conduit entrance
6035-10
28
© 1998 Square D All Rights Reserved
11/98
Dimensions
Layout
Approximate Dimensions–Not for Construction
Top conduit entrance
17.0
432
17.0
432
F
2.5
64
2.5
64
2.5
64
5.5
140
17.0
432
2.5
64
F
2.5
64
17.0
432
17.0
432
2.5
64
F
8.0
203
2.5
64
2.5
64
2.5
64
F
2.5
64
2.5
64
5.5
140
2.5
64
F
2.5
64
2.5
64
Front
Front
Front
Front
Front
Front
Incoming Cable
Section
Figure 5
Transformer Conn.
Section
Figure 6
Tie
Section
Figure 7
Incoming Cable
Section
Figure 8
Transformer Conn.
Section
Figure 9
Incoming Cable
Section
Figure 10
Instrument
or Blank
Panel
Instrument
or Blank
Panel
Instrument
or Blank
Panel
Instrument
or Blank
Panel
DSLII-632
A
A
A
A
Front elevations
2.5
64
F
8.0
203
2.5
64
D
17.0
432
DSII-516
DSII-616
DSLII-516
DSII-620
Main
Limiter
Truck
AB
B
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
DSII-632
Main
91.5
2324
DSII-632
Tie
BC
BC
Feeder
BC
Feeder
D
D
22.0
559
22.0
559
17.0
432
17.0
432
H
2.5
64
3.5
89
2.5
64
17.0
432
2.5
64
Main
Breaker
Main
Breaker
CD
CD
22.0
559
22.0
559
22.0
559
17.0
432
17.0
432
17.0
432
3.5
89
H
2.5
64
Circuit
Breaker
Element
D
22.0
559
3.5
89
Circuit
Breaker
Element
Feeder
D
H
AB
DSII-632
Main
C
DSII-308 Or for
DSII-508 Blank
DSII-608
DSLII-308
DSII-516
DSII-616
DSLII-516
2.5
64
DSLII-632
Limiter
Truck
2.5
64
H
2.5
64
2.5
64
3.5
89
H
2.5
64
2.5
64
3.5
89
H
2.5
64
3.5
89
2.5
64
Bottom conduit entrance
6035-11
29
11/98
© 1998 Square D All Rights Reserved
Dimensions
Layout
Approximate Dimensions–Not for Construction
Top conduit entrance
29.0
737
29.0
737
F
8.0
203
5.5
140
2.5
64
D
2.5
64
29.0
737
2.5
64
F
2.5
64
29.0
737
2.5
64
F
2.5
64
2.5
64
F
8.0
203
5.5
140
2.5
64
2.5
64
2.5
64
29.0
737
2.5
64
2.5
64
F
2.5
64
2.5
64
2.5
64
Front
Front
Front
Front
Front
Transformer Conn.
Section
Figure 11
Incoming Cable
Section
Figure 12
Tie
Section
Figure 13
Transformer Conn.
Section
Figure 14
Incoming Cable
Section
Figure 15
Instruments
or Blank
Panel
Instruments
or Blank
Panel
Instruments
or Blank
Panel
DSLII-840
DSLII-840
Limiter
Truck
Limiter
Truck
A
DSII-840
DSII-850 1
Main
Front elevations
DSII-840
DSII-850 1
Main
BC
Feeder
2
Feeder 2
D
2.5
64
2.5
64
2.5
64
Front
Main
Breaker CD
Main
Breaker CD
34.0
864
29.0
737
3.5
89
H
2.5
64
29.0
737
3.5
89
H
2.5
64
2.5
64
2.5
64
Front
Circuit
Breaker
Element
34.0
864
29.0
737
3.5
89
H
Circuit
Breaker
Element
34.0
864
29.0
737
3.5
89
AB
D
34.0
864
29.0
737
AB
BC
Feeder 2
D
A
DSII-840
DSII-850 1
Tie
BC
34.0
864
H
A
Front
3.5
89
H
2.5
64
2.5
64
Front
2.5
64
Front
Bottom conduit entrance
➀ DS-850 - Forced air cooled.
➁ No feeder permitted with DS-850.
6035-12
30
© 1998 Square D All Rights Reserved
11/98
Dimensions
Dimensions
Indoor Construction
Approximate Dimensions – Not for Construction
Bus
Size
Circuit
Breaker
Type
MM
IN
MM
IN
MM
IN
MM
IN
MM
IN
MM
IN
MM
IN
F
H
F
H
F
H
F
H
F
H
F
H
F
H
F
H
55.13
1400
14.5
13.5
368
343
14.5
6.5
368
165
9.0
6.5
229
165
14.5
6.5
368
165
60.13
1527
19.5
18.5
495
470
19.5
11.5
495
292
14.0
11.5
356
292
19.5
11.5
495
292
72.13
1832
31.5
30.5
800
775
31.5
23.5
800
597
26.0
23.5
660
597
31.5
23.5
800
597
63.13
1604
14.5
13.5
368
343
14.5
6.5
368
165
9.0
6.5
229
165
14.5
6.5
368
165
68.13
1731
19.5
18.5
495
470
19.5
11.5
495
292
14.0
11.5
356
292
19.5
11.5
495
292
80.13
2035
31.5
30.5
800
775
31.5
23.5
800
597
26.0
23.5
660
597
31.5
23.5
800
597
55.13
1400
14.5
13.5
368
343
14.5
6.5
368
165
…
…
…
…
14.5
6.5
368
165
60.13
1527
19.5
18.5
495
470
19.5
11.5
495
292
…
…
…
…
19.5
11.5
495
292
72.13
1832
31.5
30.5
800
775
31.5
23.5
800
597
…
…
…
…
31.5
23.5
800
597
63.13
1604
14.5
13.5
368
343
14.5
6.5
368
165
…
…
…
…
14.5
6.5
368
165
DSLII
68.13
1731
19.5
18.5
495
470
19.5
11.5
495
292
…
…
…
…
19.5
11.5
495
292
80.13
2035
31.5
30.5
800
775
31.5
23.5
800
597
…
…
…
…
31.5
23.5
800
597
DSII/DSLII
(Except
DSII/
DSLII-840
63.13
1604
14.5
13.5
368
343a
14.5
6.5
368
165
…
…
…
…
…
…
…
…
68.13
1731
19.5
18.5
495
470a
19.5
11.5
495
292
…
…
…
…
…
…
…
…
80.13
2035
31.5
30.5
800
775a
31.5
23.5
800
597
…
…
…
…
…
…
…
…
DSII
DSLII
DSII
3200 A
Circuit
Breaker
Type
➁,➂
➁,➂,➃
Figure 6
Transformer Main Unit
Figure 7
Tie Unit
Figure 8
Cable-in Main
IN
MM
IN
MM
IN
MM
IN
MM
IN
MM
F
H
F
H
F
H
F
H
F
H
F
H
F
H
F
H
55.13
1400
14.5
6.5
368
165
…
…
…
…
…
…
…
…
…
…
…
…
60.13
1527
19.5
11.5
495
292
…
…
…
…
…
…
…
…
…
…
…
…
72.13
1832
31.5
23.5
800
597
…
…
…
…
…
…
…
…
…
…
…
…
63.13
1604
14.5
6.5
368
165
…
…
…
…
…
…
…
…
…
…
…
…
68.13
1731
19.5
11.5
495
292
…
…
…
…
…
…
…
…
…
…
…
…
80.13
2035
31.5
23.5
800
597
…
…
…
…
…
…
…
…
…
…
…
…
55.13
1400
…
…
…
…
9.0
6.5
229
165
14.5
6.5
368
165
…
6.5
…
165
60.13
1527
…
…
…
…
14.0
11.5
356
292
19.5
11.5
495
292
19.5
11.5
495
292
72.13
1832
…
…
…
…
26.0
23.5
660
597
31.5
23.5
800
597
31.5
23.5
800
597
63.13
1604
…
…
…
…
…
…
…
…
14.5
6.5
368
165
…
…
…
…
DSLII
68.13
1731
…
…
…
…
…
…
…
…
19.5
11.5
495
292
…
…
…
…
80.13
2035
…
…
…
…
…
…
…
…
31.5
23.5
800
597
…
…
…
…
DSII/DSLII
(Except
DSII/
DSLII-840
63.13
1604
…
…
…
…
…
…
…
…
14.5
6.5
368
165
…
…
…
…
1600 A
or
2000 A
DSII
1600 A
or
2000 A
DSLII
3200 A
DSII
3200 A
➅
Figure 5
Cable-in Main
Section
Depth
D
MM
➁,➂,➃
(See Notes)
4000 A
5000 A
Figure 4
Tie Unit
IN
3200 A
Bus
Size
Figure 3
Transformer
Main Unit
MM
1600 A
or
2000 A
➅
Figure 2
Incoming Unit/
4 High for Unit
Figure 1,1A
Transition Aux. Unit
IN
1600 A
or
2000 A
4000 A
5000 A
Section
Depth
D
(See Notes)
68.13
1731
…
…
…
…
…
…
…
…
19.5
11.5
495
292
…
…
…
…
80.13
2035
…
…
…
…
…
…
…
…
31.5
23.5
800
597
…
…
…
…
➁,➃
➁,➂
➁,➂,➃
➁,➂,➃
NOTE: Conduit areas are for mechanical connectors. For compression lug conduit area, consult your
local Square D sales office.
• Transformer or auxiliary Unit Fig. 1A only.
➁ Conduit area for bottom (H) increases by 7 in/177.8 mm when there is no circuit breaker in the bottom cell.
➂ When a bus duct is used in this unit the top entrance (F) is decreased, consult your local Square D sales office for area.
➃ Service entrance barrier and other barriers change conduit area, consult your local Square D sales office for area.
➄ This unit has a through bus connection. For a ‘CD’ feeder, consult your local Square D sales office.
➅ 5000 A applications, consult your local Square D sales office.
31
11/98
© 1998 Square D All Rights Reserved
Dimensions
Dimensions
Indoor Construction
Approximate Dimensions – Not for Construction
Bus
Size
3200 A
➅
IN
3200 A
MM
IN
MM
IN
Figure 12
Cable-in Main
MM
IN
MM
MM
F
H
F
H
F
H
F
H
F
H
F
H
F
H
F
H
63.13
1604
9.0
8.75
229
222
…
…
…
…
…
…
…
…
…
…
…
…
68.13
1731
14.0
13.75
356
349
19.5
13.75
495
349
…
…
…
…
…
…
…
…
80.13
2035
26.0
25.75
660
654
19.0
25.75
483
654
…
…
…
…
…
…
…
…
DSII/
DSLII
63.13
1604
…
…
…
…
…
…
…
…
…
6.5
…
165
…
…
…
…
840
68.13
1731
…
…
…
…
…
…
…
…
6.5
11.5
165
292
19.5
11.5
495
292
DSII-850
80.13
2035
…
…
…
…
…
…
…
…
18.5
23.5
470
597
31.5
23.5
800
597
DSLII
➂,➄
(See Notes)
Bus
Size
Figure 11
Transformer
Main Unit
Figure 10
Cable-in Main
IN
4000 A
5000 A
Figure 9
Transformer Main
Section
Depth
D
Circuit
Breaker
Type
Circuit
Breaker
Type
DSLII
➂,➃
Figure 13
Tie Unit
Section Depth
D
IN
➁,➂
➁,➃
Figure 14 Transformer
Main
MM
IN
Figure 15
Cable-in Main
MM
IN
MM
IN
MM
F
H
F
H
F
H
F
H
F
H
F
H
63.13
1604
…
…
…
…
…
…
…
…
…
…
…
…
…
68.13
1731
…
…
…
…
…
…
…
…
…
…
…
80.13
2035
…
…
…
…
…
…
…
…
…
…
…
…
DSII/DSLII
63.13
1604
14.5
6.5
368
165
…
8.5
…
216
…
…
…
…
4000 A
840
68.13
1731
19.5
11.5
495
292
6.5
12.5
165
317
19.5
13.75
495
349
5000 A ➅
DSII-850
80.13
2035
31.5
23.5
800
597
18.5
24.5
470
622
19.0
17.75
483
451
➁,➂,➃
(See Notes)
➂
➂,➃
NOTE: Conduit areas are for mechanical connectors. For compression lug conduit area, consult your
local Square D sales office.
• Transformer or auxiliary Unit Fig. 1A only.
➁ Conduit area for bottom (H) increases by 7 in/177.8 mm when there is no circuit breaker in the bottom cell.
➂ When a bus duct is used in this unit the top entrance (F) is decreased, consult your local Square D sales office for area.
➃ Service entrance barrier and other barriers change conduit area, consult your local Square D sales office for area.
➄ This unit has a through bus connection. For a ‘CD’ feeder, consult your local Square D sales office.
➅ 5000 A applications, consult your local Square D sales office.
Lb
Kg
Type of Device
Lb
Kg
DSII-308 Circuit Breaker
Type of Device
175
79.4
DSII-850 Circuit Breaker
405
184.1
DSII-508 Circuit Breaker
180
81.7
DSLII-308 Circuit Breaker
205
93.0
DSII-608 Circuit Breaker
180
81.7
DSLII-516 Circuit Breaker
255
115.7
DSII-516 Circuit Breaker
180
81.7
DSLII-632 Limiter Truck
325
147.4
DSII-616 Circuit Breaker
185
83.9
DSLII-840 Limiter Truck
430
195.0
DSII-620 Circuit Breaker
180
81.7
4-high unit without Circuit Breakers (22")
1600
725.8
DSII-632 Circuit Breaker
300
136.0
Unit without Circuit Breakers (34")
2600
1179.3
DSII-840 Circuit Breaker
405
184.1
Auxiliary unit without devices
500
226.8
Recommended Minimum Clearance:
Front - 42" (1050 mm)
Rear - 42" (1050 mm)
Ref. NEC®, Article 110-16
32
© 1998 Square D All Rights Reserved
11/98
Suggested Specifications
General
The specifications and associated drawings describe the indoor low voltage metal-enclosed drawout
switchgear assembly. The assembly is to be designed for use on a _____ volt, (single) (3) phase, _____
wire, 50/60 Hz system, with _____ amperes symmetrical fault current available. Equipment is to be
complete from the incoming line connections to the outgoing feeder connections. Any items not
specifically mentioned but obviously necessary for proper operation are implied in this description.
The low voltage section shall be POWER-ZONE III Series 2 low voltage, metal-enclosed switchgear, as
manufactured by the Square D company, or approved equal, designed, manufactured, and tested in
accordance with applicable standards for power circuit breakers and metal-enclosed switchgear.
Applicable Standards:
Structures:
Circuit Breakers:
NEMA SG5
NEMA SG3
ANSI C37.20.1
ANSI C37.13
ANSI C37.51
ANSI C37.16
UL 1558 (Optional)
UL 1066 (Optional)
The enclosure shall be electro-deposition coated with medium gray ANSI #49 enamel applied over a
rust inhibiting phosphate primer. (Equipment shall be equipped with Service Entrance Label) (and)
(UL 1558 label for metal-enclosed low voltage power circuit breaker type switchgear assemblies when
UL recognized components are specified.)
Enclosure
The enclosure and internal barriers shall be fabricated of steel members in accordance with NEMA and
ANSI standards. Steel lifting straps are to be provided with each shipping group to lift the structure from
the top with a crane. Supply a wooden skid to permit the use of pipe rollers for moving the switchgear
to its final location in the building.
All vertical sections shall be bolted together. Ventilation openings on the front of the switchgear breaker
compartments are to be located in such a way as to preclude the possibility of metal objects being
inserted through them and easily contacting energized parts. To barrier operator from escaping gases
during an interruption, circuit breakers shall be supplied with a steel front plate when ventilation
openings are on the front of the circuit breaker compartment door.
The equipment shall be assembled, adjusted, and tested at the factory and shall be sectionalized, if
required, for shipping as requested or approved. The largest section is not to exceed ___ inches wide,
___ inches deep, and ____ inches high to enable installation at the job site.
The structure is to consist of three basic compartments from the front to the rear:
the front circuit breaker compartment, the center bus compartment, and the rear cable compartment.
Front Circuit Breaker Compartment
The front circuit breaker compartment is to contain the drawout circuit breaker elements, each mounted
in its own barriered cell. Fully prepared cells shall be equipped to accept circuit breaker drawout
mechanism and contain all secondary and primary current-carrying parts. Future use cells shall contain
current carrying parts only and shall be capable of being converted by authorized personnel to accept
a drawout circuit breaker and control circuits. Provide each circuit breaker cell and fully prepared cell
with a hinged door equipped with a flush handle and an external trip button. When equipped with a
circuit breaker, a double steel barrier shall exist between operating personnel, the circuit breaker
mechanism, and the live parts. Thus, the circuit breaker can be operated with the outer steel door open.
If the circuit breaker protrudes through a hole in the circuit breaker compartment door, shutters shall be
provided to shield live parts when the circuit breaker is out for service. Also, a steel plate shall be
provided for the opening in the circuit breaker compartment door to preclude the possibility of foreign
objects entering the circuit breaker cell when the circuit breaker is removed.
33
11/98
© 1998 Square D All Rights Reserved
Suggested Specifications
Center Bus Compartment
The bus compartment is to contain the section riser and main cross bus, which is to be rated for a
65 °C temperature rise per ANSI standards. The main cross bus shall be rated for ___ continuous
amperes. All main and riser bus shall be bolted copper and adequately braced so to be applied on a
system capable of supplying RMS symmetrical amperes of short circuit current of 50 kA, (100 kA),
(150 kA), (200 kA).
All contact surfaces at bolted joints shall be fully silver plated and the joint bolts are to be of high strength
grade 5 steel equipped with conical type spring washers. Riser bus shall meet industry standard phaseto-phase clearance without the use of insulated/isolated bus. All electrical clearances are to be for 600
Vac. (An isolated neutral bus is to be supplied rated at (50) – (100) percent of the phase current.)
Rear Cable Compartment
Size the cable compartment to accommodate all incoming and outgoing cable required within each
vertical switchgear section. Cable lugs are to be mounted on the load side (or line side as applicable)
run-back bus, which is extended into this compartment from the bus compartment. Run-back bus for
main or feeder circuit breakers are to be insulated from the section riser and the cross bus. This
compartment shall also contain a copper ground bus bolted directly to the switchgear frame. (Extend a
neutral run-back into the cable compartment for connecting the neutral to the ground bus with a
removable isolating link.) (Clamp-type cable lugs suitable for use with aluminum or copper cable are to
be supplied as shown on the plans.)
(Option 1)
The center bus compartment containing the section riser bus and main cross bus shall be segregated
from the rear cable compartment by means of grounded metal barriers. Using plastic covers over bus,
in lieu of rear barriers, for this safety precaution is not acceptable.
Circuit Breakers
The circuit breakers shall be the drawout type, manually or electrically operated Type DSII (DSLII) as
shown on the associated drawings or as listed in the equipment tabulation. The circuit breakers are to
mount on a rigid self-aligning drawout mechanism with “connected”, “test”, “disconnected”, and
“removed” positions. The front door shall be capable of being closed in the “connected”, “test”, or
“disconnected” positions. Provide interlocks to ensure the circuit breaker is open before it can be moved
from any position or when it is between positions. Include an interlock to discharge the stored energy
spring before the circuit breaker element can be withdrawn from its cell. In the “test” and “connected”
positions, provide a positive ground contact between the circuit breaker element and the structure.
Circuit Breakers of like frame sizes shall be interchangeable as standard. No special structural bracing
will be required. All circuit breaker operating mechanisms are to be fully stored energy devices with a
two-step stored energy quick-make, quick-break. Actuation of the operating handle or an operation
cycle of the circuit breaker motor is to charge the closing springs. Operation of a local “close” button is
to close the circuit breaker contact. Closing of the circuit breaker contacts shall automatically charge the
opening springs to ensure quick-break operation.
Low voltage power circuit breaker arc chutes containing asbestos will by no means be accepted.
(Circuit breakers of 5000 A frame size may be forced air cooled.)
The circuit breaker trip device is to be of a microprocessor design, which requires no external power
connections, and provided with an adjustable long-time delay, instantaneous (and short-time delay)
over-current/short circuit protection. (Include ground fault tripping as an integral part of the
microprocessor trip device.) Internal self-testing of the unit shall be provided. Indicators for overload,
short circuit, and ground trip shall be provided. (Circuit breakers are to have UL label.)
34
© 1998 Square D All Rights Reserved
11/98
Suggested Specifications
(The trip unit shall be capable of measuring AC phase currents, power, energy, trip level, and show
cause of trip. The trip unit shall be able to communicate this information, as well as permit remote
operation of the circuit breaker, via the Square D POWERLOGIC communications network.)
Padlocking provisions shall be furnished to receive up to three padlocks when circuit breaker is in the
open position, positively preventing unauthorized closing of the circuit breaker contacts. A manual trip
button and position indicator shall be furnished on all circuit breakers. A “Push to Close” button shall be
conveniently located on face of circuit breaker for easy access, thereby avoiding the need to reach
behind or around other devices located on the face of the circuit breaker.
(Include the following only when Type DSLII circuit breakers are specified:)
(Circuit breakers shall be equipped with current limiters. Current limiters shall be integrally mounted on
800 A and 1600 A frame sizes and separately mounted on 3200 A and 4000 A frame sizes. Equip each
circuit breaker with a blown limiter indicator visible from the front of the circuit breaker, and with an antisingle phase device that will trip the circuit breaker when any limiter blows and will prevent reclosing the
circuit breaker on a single phase condition resulting from blown or missing limiters.)
The following equipment shall be provided:
(1)(2) _____ Type DSII-_____ main circuit breaker(s), _____ ampere frame, 3-pole, (manually)
(electrically) operated. Long-time Trip rated _____ amperes.
_____ Type DSII- _____ tie circuit breaker, _____ ampere frame, 3-pole, (manually) (electrically)
operated. Long-time Trip rated _____ amperes.
_____ Type DSII- _____ feeder circuit breaker(s), _____ ampere frame, 3-pole, (manually)
(electrically) operated. Long-time Trip rated _____ amperes.
_____ Type DSII- _____ feeder circuit breaker(s), _____ ampere frame, 3-pole, (manually)
(electrically) operated. Long-time Trip rated _____ amperes.
Metering Components
Main Bus
(1)(2) _____ POWERLOGIC (circuit monitor model _*_) (Power meter model _*_)
____ _____
Current transformer, suitable ratio.
____ _____
Potential transformer, suitable ratio.
Feeder Circuits
____ _____
POWERLOGIC (circuit monitor model _*_) (Power meter model _*_)
____ _____
2% ammeter and 3-phase selector switch with OFF position.
____ _____
Current transformer, suitable ratio.
(Option 2)
A portable testing device shall be provided.
(Option 3)
A top mounted traveling circuit breaker lifting device shall be provided.
(__) Indicates a selection is to be made for quantity or applicability.
* (A complete line of POWERLOGIC circuit monitors, power meters, and control systems is available
for POWER-ZONE III switchgear. Consult your local Square D sales office.)
35
11/98
© 1998 Square D All Rights Reserved
Suggested Specifications
For further information about POWER-ZONE III Series 2 Switchgear, contact your local Square D field
sales office. They are conveniently located in over 160 cities throughout the U.S. and abroad to serve
you: or, write to LV Equipment Product Marketing Section, Square D Company, 1010 Airpark Center
Drive, Nashville, TN 37217
36
© 1998 Square D All Rights Reserved
11/98
Trademark Acknowledgements
Square D Company
1500 South University Blvd.
Middletown, OH 45044
(513) 424-1601
www.squared.com
The following trademarks or registered trademarks are the property of the indicated entities.
American National Standards Institute
ANSI
Cutler-Hammer Corporation
DIGITRIP
National Fire Protection Association
National Electrical Code, NEC
National Electrical Manufacturers’ Association
NEMA
Square D Company
SQUARE D, POWER-ZONE, POWERLOGIC,
Underwriter’s Laboratories
UL
6035CT9201 11/98 November 1998 © 1998 Square D All Rights Reserved.
Replaces 6035CT9201 dated 7/94.