SECTION [26 18 39] [16349]
MEDIUM VOLTAGE CONTROLLERS
PART 1 - GENERAL
1.1
SCOPE
A.
1.2
This Section includes NEMA Class E2 medium voltage metal-enclosed motor controllers with
fused power assemblies and drawout contactors.
RELATED DOCUMENTS
A.
1.3
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
SUBMITTALS
A.
Submit shop drawings and product data for approval and final documentation in the quantities
listed according to the Conditions of the Contract. All transmittals shall be identified by
purchaser name, purchaser location and purchaser order number.
B.
Documents for Approval: Dimensioned plans, sections and elevations showing minimum
clearances, installed devices, major features, nameplate legends and bills of material.
C.
Final Documents: Record documentation to include those in 1.3.B and wiring diagrams and
three-line diagrams, product data of accessories or parts not previously described in the
drawings, list of recommended spare parts, and instruction and installation manuals
D.
Product Data: Include features, characteristics and ratings of individual contactors, fuse
assemblies and other components. Also, include time-current characteristic curves for power
fuses and overcurrent protective devices.
E.
Shop Drawings: General arrangement drawing showing dimensioned plan, elevation, and
details, including required clearances and service space around equipment. Show tabulations
of installed devices, equipment features and ratings. Include the following:
1.
Enclosure types and details.
2.
Nameplate legends.
3.
Bus configuration with size and number of conductors in each bus run, including phase
and ground conductors of main and feeder buses.
4.
Current rating of buses.
5.
Short-circuit current rating of controller assembly.
6.
Wiring Diagrams: Diagram power, signal and control wiring including differentiation
between manufacturer-installed and field-installed wiring.
1.4
RELATED STANDARDS
A.
1.5
Comply with requirements of latest revisions of applicable industry standards, specifically
including the following:
1.
UL 347 - Medium Voltage Controllers
2.
NEMA ICS 3-2000, Part 1 – Medium Voltage Controllers
QUALITY ASSURANCE
A.
1.6
Manufacturer Qualifications: Engage a firm with at least 15 years experience in manufacturing
Class E2 controllers.
DELIVERY, STORAGE AND HANDLING
A.
Deliver products in factory labeled packages. Shipping groups shall not exceed 12 ft. in length.
B.
Store and handle in strict compliance with manufacturer’s instructions and recommendations.
Protect from potential damage from weather and construction operations.
Store so
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-1
condensation will not form on or in controller, and if necessary, apply temporary heat where
required to obtain suitable service conditions.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
2.2
[The medium voltage controller assembly shall be manufactured by Siemens or preapproved equal. Approved manufacturers are as follows:
1.
SIEMENS
2.
. ]
RATINGS
A.
[System Configuration: Controller assembly suitable for application in three-phase,
[60Hz] [50Hz], [grounded] [ungrounded] system. ]
B.
[Electrical Ratings
1.
Nominal System Voltage, kV: [2.3] [4.16] [6.6].
2.
Maximum Design Voltage, kV: [2.4] [4.8] [7.2].
3.
Frequency: [60Hz] [50Hz]
4.
Horizontal bus continuous amperes: [1000] [1200] [2000] [3000].
5.
Vertical bus continuous amperes: [360] [540] [720]
6.
Ground bus continuous amperes: 600
2.3
GENERAL REQUIREMENTS
A.
The controller shall be factory assembled and tested and comply with applicable industry
standards. It shall be a coordinated design so that shipping groups are easily connected
together at the site into a continuous lineup. Necessary connecting materials shall be furnished.
Bus splice plates and hardware shall ship installed in the equipment to prevent loss during
shipment. All contactors and assemblies shall be produced by a single manufacturer in an ISO9000 certified facility.
B.
[The controller assembly shall be UL listed where arrangement and device selection
allows.]
C.
The controller assembly shall consist of one or more metal-enclosed sections in an
[indoor NEMA 1] [indoor NEMA 1 gasketed] [indoor NEMA 2] [indoor NEMA 12] [outdoor
NEMA 3R] enclosure.
D.
Individual vertical sections shall be three-high to accommodate drawout controller assemblies
without de-rating and shall include:
1.
Fabricated of minimum 11 gauge steel for the frame, minimum 12-gauge for doors.
Typical dimensions shall be [90”] [100”] high, 36” wide and 36” deep. [The three-high
structure with contactors in the two lower cells and LV devices in the upper cell
are 90” high. Otherwise a 10” top hat is needed for the main bus.]
2.
End sections shall include provisions for main bus extension and installation of future
vertical sections.
3.
The design shall incorporate preformed steel channels, angles and side sheets bolted
together and reinforced to form a rigid, self-supporting assembly.
E.
Fabricate with dead-front construction utilizing sheet steel barriers for isolation of the power bus
compartments from the drawout controller area. Include sliding shutter mechanism to
automatically cover the line side stab connections whenever the controller is racked off the bus.
The rear of each section to be provided with a two-piece removable barrier for access.
F.
Power (horizontal) bus shall connect vertical sections and between compartments and shall not
be tapered.
1.
Bus shall be [98 % minimum conductivity copper with silver-plated joints] [98 %
conductivity copper with tin-plated joints]
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-2
2.
3.
Ground Bus shall be copper of 98 percent minimum conductivity, with pressure connector
for feeder and branch-circuit ground conductors, minimum size 1/4 by 2 inches.
Busbars shall be bare, except where clearance considerations require that the bus be
insulated. Busbar insulation shall be Raychem heat shrink sleeving. Bolted bus joints
requiring insulation shall be insulated with secure joint covers that can easily be removed
and reinstalled.
G.
Vertical bus to be provided in sections housing drawout controllers.
H.
Finish: Steel parts shall be prepared for painting by a five-stage wash system consisting of an
alkaline cleaner, fresh water rise, iron phosphate treatment, fresh water rise and non-chromate
sealer. After cleaning and stabilization, the steel parts shall be coated with a thermosetting
polyester urethane powder applied with electrostatic equipment at a nominal 2 mils dry film
thickness and then cured properly. The paint finish shall have a pencil hardness of 2H, a salt
spray rating as defined in ASTM B-117 of 600 hours. Paint color shall be ANSI light gray.
I.
[NOTE: Select one of the next two paragraphs. Either Shelter Clad or Non-Walk-in]
[Outdoor Shelter-Clad Single Aisle. Single Aisle design shall consist of indoor type
controller assembly located in a weather-proof steel housing having an operating aisle
space of sufficient size to permit withdrawal of the contactor for inspection, test and
maintenance. Included shall be the following:
1.
Outdoor enclosure: Painted steel enclosure (using the same paint system as
described above in paragraph H), weatherproof construction; integral structuralsteel base frame with factory-applied asphalt undercoating; and equipped with the
following features:
2.
[Adequate incandescent lighting receptacles controlled by means of a three-way
wall switch at each access door][Fluorescent aisle lights with low-temperature
ballasts, controlled by a three way wall switch at each access door.]
3.
Space heaters operating at one-half rated voltage, sized to prevent condensation in
each vertical section.
4.
Louvers equipped with insect/rodent screen and filter and arranged to permit air
circulation while excluding exterior dust and rodents.
5.
Common internal aisle of sufficient width to drawout contactor withdrawal,
disassembly and servicing in aisle.
6.
Aisle access doors at each end with outside padlocking provisions and interior
panic latches.
7.
Two duplex receptacles with integral ground fault protection, one at each aisle
access door.
8.
[Aisle heaters] [Exhaust fans] thermostatically controlled.
9.
[Thermally insulated aisle for better control of internal conditions]
10.
[Wall mounted HVAC unit]
11.
[Exterior door area lighting consisting of halogen fixtures [photo cell operated]]
12.
[Exterior rotating alarm light] ]
J.
[Outdoor Non-Walk-In Enclosure. Non-walk-in design shall consist of indoor controller
assemblies located in a weather-proof painted steel enclosure (using the same paint
system as described above in paragraph H), with structural-steel base frame and factoryapplied asphalt undercoating; and equipped with the following features:
1.
Each unit equipped with an exterior full height hinged front door with provision for
padlocking and interior cell hinged doors.
2.
Space heater operating at one-half rated voltage, sized to prevent condensation in
each vertical section.
3.
Louvers equipped with insect/rodent screen and filter and arranged to permit air
circulation while excluding exterior dust and rodents.
4.
One lamp receptacle with on-off switch in each unit.
5.
One utility duplex receptacle with integral ground fault protection in each unit.
6.
A switch located in one cell to control all space heaters.]
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-3
2.4
COMPONENTS
A.
Instrument Transformers: Comply with IEEE C57.13.
1.
Voltage Transformers: Secondary-voltage rating of 120 V and accuracy class of 0.3 with
burdens of W, X and 0.6 Y.
2.
Current Transformers: Ratios as indicated; burden and accuracy class suitable for
connected relays, meters and instruments.
B.
Multifunction Digital-Metering Monitors shall be UL-listed or -recognized, microprocessor-based
unit suitable for three- or four-wire systems. Units shall be flush mounted on the instrument
compartment door and be Siemens Model PAC3200 or equal.
C.
Motor protection device shall be one of the following:
1.
[Standard Bimetallic thermal overload relay, Siemens Type 3UA]
2.
[Optional: Solid state relay, Siemens Type ESP100] [Solid state relay, Siemens
Type 3RB, with ground fault protection]
3.
[Optional: The relay shall be a Siemens SIMPRO-100 or equivalent. The relay shall
provide the following protection functions: 50/50N, 49, 46, 47, 66, Load Jam, Load
Loss.
a.
The relay shall have optional voltage inputs to provide the following
protection functions: 27, 59, 37, 55 and 81.
b.
Option 1: The relay shall provide 11 internal RTD inputs. RTD inputs shall be
programmable to type.
c.
Option 2: The relay shall provide an optional external RTD module with 12
RTD inputs, connecting to the relay via fiber optic cable.
d.
The relay shall provide Modbus RTU communications.
e.
The relay shall provide motor start reports that include motor currents,
voltages and motor thermal information. The relay shall store the 5 latest
reports in non-volatile memory.
The motor start reports shall be
downloadable into computer spreadsheets for use in motor analysis.
f.
The relay shall provide the 18 latest 30-day averages of motor start
information. The motor trend information shall be downloadable into
computer spreadsheets for motor analysis.
g.
The relay shall provide an optional module to supply motor differential
protection. This shall be a separate module with independent power supply.
The module shall be Siemens 7SJ6025-5EB00-1FA0.
h.
The relays shall provide complete sequence-of-events recording, time
stamped every millisecond.
The relays shall provide oscillography
(waveform) capture, with configurable pre- and post-fault data capture
times.]
4.
[Motor differential protection shall not be included as a function of the motor
protection. It shall be provided by a separate relay to facilitate improved
protection.]
D.
Feeder overcurrent protection with communication shall be the following:
1.
The relays shall be Siemens 7SJ602x-xxxxx-xxxx or equivalent. The relay shall provide
the following protection functions: 50/51, 50N/51N, 49 and 46.
2.
The relays shall have four analog CT inputs.
3.
The relays shall provide trip circuit supervision of the feeder breaker and alarm on trip
circuit failure.
4.
The relays shall be capable of being used in a reverse interlocking bus protection
scheme.
5.
The relays shall have a modular communications processor to permit field change
between Modbus RTU, Profibus-DP and IEC60870-5-103 protocols. The relay must be
able to support either RS-485 or fiber optic communications. The relays shall provide
complete sequence-of-events recording, time stamped every millisecond. The relays
shall provide oscillography (waveform) capture, with configurable pre- and post-fault data
capture times.
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-4
E.
Transformer overcurrent protection with communication shall provided by a feeder overcurrent
relay per paragraph 2.04.D above and in addition the following shall be provided:
1.
Transformer differential protection shall be provided by a Siemens 7UT512x-xGB11-xxA0
relay or equivalent.
2.
The transformer differential relay shall have a through-fault restraint setting to prevent
tripping due to high current external faults.
3.
The relays shall provide complete sequence-of-events recording, time stamped every
millisecond. The relays shall provide oscillography (waveform) capture, with configurable
pre- and post-fault data capture times.
F.
Control Power Supply: Control power transformer supplying 120Vac control circuits are to be
dry-type transformers with primary current limiting fuses.
1.
Units rated 3 kVA and below shall be mounted on the drawout carriage.
2.
Single-phase, [.750] [2.0] [3.0] kVA.
2.5
[DRAWOUT CONTROLLER ASSEMBLY]
A.
Shall consist of a [magnetically held][mechanically latched] contactor [360] [720] ampere,
primary fuses for short circuit protection and to include the following:
1.
Overload relay as described in paragraph 2.4.C or 2.4.D-E as selected above.
2.
Line and load side stab fingers to allow complete removal of the drawout unit
without disconnecting the power cable.
Glass polyester shutters shall
automatically cover the line side stabs when the controller is racked out.
3.
Fuse assembly with minimum short circuit rating of 50 kA symmetrical. Fuses to
be ANSI Class “R” (Class “X” for 57X size) for motor starting duty [Class E for
transformer or capacitor feeder duty]. Fuses shall be Siemens Type FM or A720R
or approved equal. Fuses shall be mounted as an integral part of the controller
drawout assembly. Fuse pullers shall not be required. The operator shall not be
required to reach inside the controller cubicle to remove or install power fuses.
4.
Vacuum interrupter main contact design shall have a minimum electrical life of
250,000 operations. Feeler gauges shall not be required to check contact wear.
5.
Contactor coils shall be dual rated AC/DC for 24-60VAC/DC or 110-250VAC/DC.
6.
Single phase control power transformer as specified in paragraph 2.4.F.
7.
The drawout carriage shall be equipped with a set of contact fingers connected to
the CPT secondary. The contact fingers shall be arranged to ensure any load on
the CPT is disconnected prior to the main power stabs disengaging. De-energizing
the secondary of the CPT shall not depend on the operation of auxiliary contacts
or cut-off switches.
8.
Operating handle shall be equipped with padlock provisions.
9.
The racking mechanism is to combine the following safety interlocks:
a.
Prevent forward and back movement of the drawout carriage unless the
contactor is de-energized or open.
b.
Prevent the opening of the high voltage compartment door unless the
drawout carriage is in the disconnect position.
c.
Prevent the movement of the drawout carriage to or from the connected
position unless the high voltage compartment door is closed.
10.
A test switch shall be provided to switch from run to test mode. This switch shall
be located on the back side of the low voltage door. With the contactor racked out
and the door opened, the test mode shall be selectable. It shall allow for
maintenance and operation of the main contactor and low voltage control circuitry
without requiring energizing the motor or disconnecting any load cables. An
interlock shall be provided to prevent application of test power when the contactor
is racked in.
11.
A control receptacle shall be furnished that connects to the pre-wired auxiliary and
coil contacts of the drawout controller carriage. It shall remain connected in the
racked-out position to facilitate testing.
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-5
12.
13.
2.6
Externally visible red LED indicating light, illuminated when contactor is connected
to bus.
Low voltage compartment with door-in-door construction shall be provided to
provide access from the front.
a.
Compartment to be isolated from high voltage compartments and house
components including terminal blocks, overload relay, control wiring.
Overload reset button to be in door.
b.
Compartment shall house components including terminal blocks, overload
relay and control wiring. Overload reset button shall be door mounted.
c.
All control wiring within the assembly shall be continuous and shall
terminate on each end at a suitable terminal block. Control wiring shall be
No. 14 AWG minimum, stranded type SIS and shall be labeled at each end
with sleeve-type wire markers.
d.
Wire markers shall be machine imprinted with the wire name as indicated on
the wiring diagrams.
e.
Terminals shall be insulated locking fork or ring tongue type except where
connecting to components that do not accept these terminations.
UNITS REQUIRED
A.
Incoming Line:
Qty [__]
1.
3 - [__]kV MCOV [station][intermediate][distribution] class surge arresters
2.
3 Phase surge capacitors
3.
[Set of [__]voltage transformers, rated [__V]
4.
[Set of [__]current transformers, rated [__A]
5.
[1 Microprocessor-based 3-phase and ground overcurrent relay, ANSI Device
50/51, 50/51N.]
6.
[1 – Microprocessor-based meter]
7.
[Space heater and thermostat]
8.
[NOTE: Pick one of the next three (lugs, bus or close coupled).] [Set cable lugs _
per phase, [Clamp-type] [compression-type] [Cable terminators] [Pot-heads] for
[__] type cable [__] size, [__] kV for [top] [bottom] entry.] [Provisions for
connection to metal-enclosed bus rated [__] A.] [Provisions for close-coupled bus
connection to switchgear.]
B.
FVNR (Full Voltage Non-Reversing Squirrel Cage Motor Starters: Qty [__]
1.
3-pole vacuum contactor
2.
(3) Power current limiting fuses
3.
Control power transformer, 0.75 kVA
4.
Master control relay
5.
Start/stop pushbutton
6.
Ambient compensated thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.04.C-E above.
7.
Externally mounted overload reset button
8.
(3) Current transformers
9.
Test switch and circuit
10.
Contactor position indicator light
11.
[Space heater and thermostat]
12.
Set of cable lugs
13.
Drawout carriage mechanism
C.
FVR (Full Voltage Reversing Squirrel Cage Motor Starters: Qty [__]
1.
A 3-pole main vacuum contactor
2.
A 3-pole fixed forward vacuum contactor
3.
A 3-pole fixed reversing vacuum contactor
4.
(3) Power current limiting fuses
5.
Control power transformer, 0.75 kVA
6.
Master control relay
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-6
7.
8.
9.
10.
11.
12.
13.
14.
15.
2.7
Forward/Off/Reverse pushbutton
Ambient compensating thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.04.C-E above.
Externally mounted overload reset button
(3) Current transformers
Test switch and circuit
Contactor position indicator light
[Space heater and thermostat]
Set of cable lugs
Main drawout carriage mechanism
D.
RVATNR (Reduced Voltage Autotransformer, Non-Reversing Squirrel Cage Motor
Starters:
Qty [__]
1.
A 3-pole main vacuum contactor
2.
A 3-pole fixed starting vacuum contactor
3.
A 3-pole fixed running vacuum contactor
4.
(3) Power current limiting fuses
5.
Medium duty Autotransformer, with 50, 65 and 80 % voltage taps, mounted in an
auxiliary structure
6.
Automatic transfer timing relay
7.
Control power transformer, 0.75 kVA
8.
Master control relay
9.
Start/Stop pushbutton
10.
Incomplete sequence relay
11.
Ambient compensating thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.04.C-E above.
12.
Externally mounted overload reset button
13.
(3) Current transformers
14.
Test switch and circuit
15.
Contactor position indicator light
16.
[Space heater and thermostat]
17.
Set of cable lugs
18.
Main drawout carriage mechanism
E.
RVPRNR (Reduced Voltage Primary Reactor, Non-Reversing Squirrel Cage Motor
Starters:
Qty [__]
1.
A 3-pole main contactor
2.
A 3-pole fixed shorting vacuum contactor
3.
(3) Power current limiting fuses
4.
Medium duty primary reactor with 50, 65 and 80 % voltage taps, mounted in an
auxiliary structure
5.
Automatic transfer timing relay
6.
Control power transformer, 0.75 kVA
7.
Master control relay
8.
Start/Stop pushbutton
9.
Incomplete sequence relay
10.
Ambient compensating thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.04.C-E above.
11.
Externally mounted overload reset button
12.
(3) Current transformers
13.
Test switch and circuit
14.
Contactor position indicator light
15.
[Space heater and thermostat]
16.
Set of cable lugs
17.
Main drawout carriage mechanism
ACCESSORIES AND SPARES
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-7
A.
No special accessories such as fuse pullers, feeler gauges, etc. shall be required.
B.
It is required to supply the following:
1.
Three spare power fuses of each rating
2.
Two spare primary fuses for potential transformer and control power transformer
3.
Spare Indicating Lights: One of each type installed
4.
Touchup Paint: One-half pint of paint matching enclosure finish.
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Examine surfaces to receive controller assemblies for compliance with installation tolerances
and other conditions affecting performance. Proceed with installation only after unsatisfactory
conditions have been corrected.
B.
Install and anchor controller in accordance with manufacturer’s instructions.
C.
Tighten bus joints, electrical connectors and terminals according to manufacturer's published
torque-tightening values. Install equipment grounding conductors for controller assembly with
ground continuity to main electrical ground bus.
3.2
ADJUSTMENTS AND CLEANING
A.
Set field-adjustable, protective-relay trip characteristics
B.
Clean exposed surfaces using manufacturer recommended materials and methods. Touch-up
damaged coating and finishes using non-abrasive materials and methods recommended by
manufacturer. Eliminate all visible evidence of repair.
3.3
TESTING
A.
Testing: After installing controller assemblies and after electrical circuitry has been energized,
demonstrate product capability and compliance with requirements.
1.
Perform each electrical test and visual and mechanical inspection per the manufacturer’s
O&M manuals.
2.
Correct malfunctioning units on-site, and retest to demonstrate compliance.
B.
Perform production tests in compliance with UL and NEMA ICS requirements.
3.4
WARRANTY
A.
3.5
Equipment manufacturer warrants that all goods supplied are free of non-conformities in
workmanship and materials. The manufacturer's warranty shall extend to at least 12 months
after initial energization, or 18 months from date of shipment from factory, whichever is first.
[STARTUP SERVICES
A.
Engage a factory-authorized service representative to perform startup service.
B.
Train Owner's maintenance personnel on procedures and schedules for energizing and
de-energizing, troubleshooting, servicing and maintaining equipment and schedules.
C.
Verify that the controllers are installed and connected according to the Contract
Documents.
D.
Verify that electrical control wiring installation complies with manufacturer's submittal by
means of point-to-point continuity testing. Verify that wiring installation complies with
requirements in Division [26] [16] Sections.
E.
Complete installation
instructions.
F.
Field service: Controller assembly manufacturer’s own field service office shall be
located not more than a three hour drive from the installation site. ]
July 25, 2016
Medium Voltage Controllers
and startup
checks according to manufacturer's written
[Project Name]
[26 18 39] [16349]-8
END OF SECTION
July 25, 2016
Medium Voltage Controllers
[Project Name]
[26 18 39] [16349]-9