SECTION 26 18 39
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 medium voltage motor controllers with drawout-type construction.
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 documents listed 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
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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,
three-wire [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: [as required for equipment arrangement]
6.
Ground bus size: ¼ by 2 inches
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” for top-mounted bus] {104” for 3000A bus]
high, 36” wide and 36” deep.
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 drawout carriage is
racked off the bus. The rear of each section to be provided with a two-piece removable steel
sheet 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]
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2.
3.
Ground Bus shall be copper of 98% 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. [OPTIONAL: Busbar insulation shall be 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 rinse, iron phosphate treatment, fresh water rinse and nonchromate 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 Walk-In or Non-Walk-In] [Outdoor
Walk-In 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 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.]
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 sized to prevent condensation in each vertical section.
3.
One lamp receptacle with on-off switch in each unit.
4.
One utility duplex receptacle with integral ground fault protection in each unit.
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 WX,
0.6 Y.
2.
Current Transformers: Ratios as indicated; burden and accuracy class suitable for
connected relays, meters and instruments.
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B.
Multifunction Digital-Metering Monitors shall be UL-listed or UL-recognized, microprocessorbased unit. Units shall be flush mounted on the instrument compartment door and be Siemens
Model 9300 or equal.
C.
[NOTE: Select clause C if a microprocessor motor protection relay is desired in place of
the standard ambient-compensated thermal overload relay]. Motor protection device
shall be:
1.
The relays shall be Siemens 7SK80 protective relay or equivalent. The relay shall
provide the following protection functions: 50/51, 50N/51N, 67N, 67Ns, 50Ns,
59N/64, 37, 48, 66, 14, 51M, 49, 46, 27, 59, 81O/U, 50BF, 46, and 47.
2.
The relays shall have four analog CT inputs and three voltage inputs.
3.
The relays shall have five internal RTD inputs.
4.
The relays shall have the option to connect 12 external RTD inputs through an
Ethernet connection.
5.
The relays shall provide trip circuit supervision of the feeder circuit breaker and
alarm on trip circuit failure.
6.
The relays shall monitor the CT circuits and alarm on circuit failure.
7.
The relays shall be capable of being used in a reverse interlocking bus protection
scheme.
8.
The relay shall provide logic programmability to create starting schemes for
example reduced voltage starting.
9.
The relay shall provide logic programmability to create failsafe tripping logic.
10.
The relays shall be capable of being used in a reverse interlocking bus protection
scheme.
11.
The relays shall provide demand alarms.
12.
The relays shall have nine programmable function keys to replace control
switches.
13.
The relays shall have programmable logic capabilities to permit use in protection
and control systems. Programming software must be compliant with IEC 1131
standard for PLC programming.
14.
The relays shall have a modular communications processor to permit field change
between IEC61850, Modbus RTU, Profibus-DP, DNP3.0 and IEC60870-5-103
protocols. The relays must be able to support either RS-485 or fiber optic
communications.
15.
The relays shall provide complete sequence-of-events recording, time stamped in
milliseconds. The relays shall provide oscillography (waveform) capture, with
configurable pre- and post-fault data capture times.
16.
The relays shall recognize and alarm CT open circuit or short circuit conditions.
17.
All relay connectors including CT connectors will be pluggable to ensure ease of
relay replacement and maintenance testing.
18.
The housing must be a sealed dust proof environment for the relay internal
electronics. Heat build up must be dissipated through the surface area of the steel
enclosure. The relay thus will maintain its tested insulation characteristic
standards per IEC, IEEE, even if deployed in harsh dusty environments.
19.
The relay must provide 20 flexible functions that can be used to create additional
protection functions to maximize application flexibility.
D.
[NOTE: Select clause D if non-motor feeders are included.] Feeder overcurrent
protection with communication shall be the following:
1.
The relays shall be Siemens 7SJ80 protective relay or equivalent. The relay shall
provide the following protection functions: 50/51, 50N/51N, 67, 67N, 64, 87N, 37,
49, 46, 27, 59, 81O/U, 50BF, 46, 47, 25, 79, 21FL.
2.
The relays shall have four analog CT inputs and three voltage inputs.
3.
The relays shall provide trip circuit supervision of the feeder circuit breaker and
alarm on trip circuit failure.
4.
The relays shall monitor the CT circuits and alarm on circuit failure.
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5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
E.
2.5
The relays shall be capable of being used in a reverse interlocking bus protection
scheme.
The relays shall provide demand alarms.
The relays shall have nine programmable function keys to replace control
switches.
The relays shall have programmable logic capabilities to permit use in protection
and control systems. Programming software must be compliant with IEC 1131
standard for PLC programming.
The relays shall be capable of being used in a reverse interlocking bus protection
scheme.
The relays shall have a modular communications processor to permit field change
between IEC61850, Modbus RTU, Profibus-DP, DNP3.0 and IEC60870-5-103
protocols. The relays must be able to support either RS-485 or fiber optic
communications.
The relays shall provide complete sequence-of-events recording, time stamped in
milliseconds. The relays shall provide oscillography (waveform) capture, with
configurable pre- and post-fault data capture times.
The relays shall recognize and alarm CT open circuit or short circuit conditions.
All relay terminal blocks including CT blocks will be pluggable to ensure ease of
relay replacement and maintenance testing.
The housing must be a sealed dust proof environment for the relay internal
electronics. Heat build up must be dissipated through the surface area of the steel
enclosure. The relay thus will maintain its tested insulation characteristic
standards per IEC, IEEE, even if deployed in harsh dusty environments.
The relay must provide 20 flexible functions that can be used to create additional
protection functions to maximize application flexibility.
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, [0.75] [2.0] [3.0] kVA.
[DRAWOUT CONTROLLER ASSEMBLY]
A.
For 360A, main contactor shall be drawout type, with primary current limiting fuses
mounted on the same drawout carriage. For 720A, the main contactor shall be fixedmounted, and the primary current limiting fuses shall be mounted on a drawout carriage,
with interlocking as required between the contactor and the drawout carriage. Each
controller 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 as selected above.
2.
Line and load side stab fingers to allow complete removal of the drawout unit
without disconnecting the power cable.
A glass polyester shutter shall
automatically cover the line side stabs when the drawout carriage 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 drawout
carriage 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.
Single phase control power transformer as specified in paragraph 2.4.E.
6.
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
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7.
8.
9.
10.
11.
12.
2.6
the secondary of the CPT shall not depend on the operation of auxiliary contacts
or cut-off switches.
Operating handle shall be equipped with padlock provisions.
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.
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.
A control receptacle shall be furnished that connects to the pre-wired auxiliary and
coil contacts of the drawout carriage. It shall remain connected in the racked-out
position to facilitate testing.
Externally visible red LED indicating light, illuminated when carriage 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
(unless
microprocessor relays are specified as in 2.4.C or 2.4.D), control wiring.
Overload reset button to be in door for units with ambient-compensated
thermal overload relay.
b.
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.
c.
Wire markers shall be machine imprinted with the wire name as indicated on
the wiring diagrams.
d.
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.
Surge capacitors (3-phase set)
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, as specified in 2.4.D.]
6.
[1 – Microprocessor-based meter, as specified in 2.4.B]
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] [Provisions for connection to metalenclosed 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
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3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Control power transformer, [0.75] [2.0] [3.0] kVA
Master control relay
Start/stop pushbutton
Ambient-compensated thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.4.C or 2.4.D 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
Drawout carriage mechanism
C.
FVR (Full Voltage Reversing Squirrel Cage Motor Starters: Qty [__]
1.
3-pole main vacuum contactor
2.
3-pole fixed forward vacuum contactor
3.
3-pole fixed reversing vacuum contactor
4.
(3) Power current limiting fuses
5.
Control power transformer, [0.75] [2.0] [3.0] kVA
6.
Master control relay
7.
Forward/Off/Reverse pushbutton
8.
Ambient-compensated thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.4.C or 2.4.D above.
9.
Externally mounted overload reset button
10.
(3) Current transformers
11.
Test switch and circuit
12.
Contactor position indicator light
13.
[Space heater and thermostat]
14.
Set of cable lugs
15.
Main drawout carriage mechanism
D.
RVATNR (Reduced Voltage Autotransformer, Non-Reversing Squirrel Cage Motor
Starters:
Qty [__]
1.
3-pole main vacuum contactor
2.
3-pole fixed starting vacuum contactor
3.
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] [2.0] [3.0] kVA
8.
Master control relay
9.
Start/Stop pushbutton
10.
Incomplete sequence relay
11.
Ambient-compensated thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.4.C or 2.4.D 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
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2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
2.7
A 3-pole fixed shorting vacuum contactor
(3) Power current limiting fuses
Medium duty primary reactor with 50, 65 and 80 % voltage taps, mounted in an
auxiliary structure
Automatic transfer timing relay
Control power transformer, [0.75] [2.0] [3.0] kVA
Master control relay
Start/Stop pushbutton
Incomplete sequence relay
Ambient-compensated thermal overload relay Siemens type 3RU11 or as specified
in Para. 2.4.C or 2.4.D 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
ACCESSORIES AND SPARES
A.
No special accessories such as fuse pullers, feeler gauges, etc., shall be required.
B.
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 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. Touchup
damaged coating and finishes using non-abrasive materials and methods recommended by
manufacturer. Eliminate all visible evidence of repair.
3.3
3.4
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.
WARRANTY
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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 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. ]
and startup
checks according to manufacturer's written
END OF SECTION
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