SECTION 16425
GENERATOR QUICK CONNECT SWITCHBOARD
[FOR EMERGENCY SHELTER SYSTEM WITH ROLL-UP GENERATOR]
PART 1 - GENERAL
1.01
REQUIREMENTS
A.
1.02
SCOPE
A.
1.03
The general provisions of the Contract, including General and Supplementary
Conditions and General Requirements, apply to the work specified in this
Section.
The work under this Section shall include furnishing and installing a complete
generator quick connection switchboard(s), utilizing a main circuit protective
device, generator lug and receptacle connections as shown on the Drawings and
herein specified.
QUALITY ASSURANCE
A.
All equipment, materials, and their installation shall conform to the requirements
of the National Electrical Code (NEC), local code requirements, and these
Specifications.
B.
All equipment and material shall be listed by Underwriter's Laboratories, Inc. (UL)
for their intended use and shall bear the UL label.
C.
Equipment shall be constructed in accordance with National Electrical
Manufacturer's Association (NEMA) standards.
D.
Submittals are required in accordance with SECTION 16010 of these
Specifications. The manufacturer shall furnish printed product data and also
provide drawings to include components, materials, finishes, detailed plan and
elevation views, required conduit rough-in openings, anchors, pad accessories,
wiring diagrams, key interlock scheme drawings and sequence of operations.
Submittals shall also include, but not be limited to the following:
1.
Lug sizes.
2.
Bus arrangements with all ampere ratings noted.
3.
Type and spacing of bus supports.
4.
Maximum short-circuit bracing.
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GENERATOR QUICK CONNECT SWITCHBOARD
1.04
SECTION 16425
5.
Circuit breaker trip ratings and frame sizes.
6.
Circuit breaker arrangements.
7.
Overall dimensions.
8.
Metering.
9.
Surge protective devices when SPDs are integral with the switchboard.
Provide submittals as described in Section 16418.
10.
Wiring diagrams for the single-phase protection and ground fault
protection systems.
E.
The generator quick connection switchboard(s) shall be factory engineered and
shall be a completely assembled unit, complete as shown on the Drawings
and/or herein specified.
F.
The manufacturer of the assembly shall be the manufacturer of the major
components within the assembly.
G.
The manufacturer shall be ISO 9001 or 9002 certified for the equipment
specified herein.
DELIVERY, STORAGE AND HANDLING
A.
Deliver material and products in factory labeled packages. Store and handle in
strict compliance with manufacturer’s instructions and recommendations.
B.
Each switchboard section shall be delivered in individual shipping splits and
individually wrapped for protection and mounted on shipping skids.
C.
Store in a clean, dry space. Maintain factory protection and /or provide an
additional heavy canvas or heavy plastic cover to protect structure from dirt,
water, construction debris, and traffic. Where applicable, provide adequate
heating within enclosures to prevent condensation.
D.
Handle in accordance with NEMA PB2.1 and manufacturer’s written instructions.
Lift only by lifting means provided for this express purpose. Handle carefully to
avoid damage to switchboard internal components, enclosure and finish.
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GENERATOR QUICK CONNECT SWITCHBOARD
SECTION 16425
PART 2 - PRODUCTS
2.01
2.02
MANUFACTURERS
A.
The generator quick connection switchboard(s) shall be as manufactured by
CUTLER-HAMMER, GENERAL ELECTRIC, SIEMENS, or SQUARE D.
B.
The listing of specific manufacturers does not imply acceptance of their products
that do not meet the specified ratings, features and functions. Manufacturers
listed are not relieved from meeting these specifications in their entirety.
C.
The manufacturer of this equipment shall have produced similar electrical
equipment for a minimum of ten (10) years.
MATERIALS AND COMPONENT
A.
Construction:
1.
The generator quick connection switchboard shall be of the modular type
construction, constructed in accordance with the latest NEMA PB-2 and
UL 891 standards with the required number of vertical sections bolted
together to form one metal enclosed rigid switchboard. The sides and
rear shall be covered with removable bolt-on covers. All edges of front
covers and hinged front panels shall be formed. Provide adequate
ventilation within the enclosure.
2.
All sections of the switchboard shall be front and rear aligned as shown
on the Drawings with depth as required by the manufacturer with all code
required clearances maintained. All protective devices shall be grouped
mounted. Devices shall be front removable and load connections front
accessible enabling switchboard to be mounted against a wall.
3.
The switchboard shall be provided with load connection options to cross
bus or mechanical outgoing cable terminations, which shall be suitable
for copper or aluminum conductors.
4.
The assembly shall be provided with adequate lifting means.
5.
The switchboard framework shall be fabricated on a dieformed steel base
or base assembly consisting of formed steel channel welded or bolted
together to rigidly support the entire shipping unit for moving on rollers
and floor mounting. The framework shall be formed code gauge steel,
rigidly welded and bolted together to support all coverplates, bussing, and
component devices during shipment and installations.
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GENERATOR QUICK CONNECT SWITCHBOARD
6.
SECTION 16425
Top and bottom conduit area(s) shall be clearly shown and dimensioned
on the shop drawings.
[ENGINEER, CHOOSE INDOOR OR OUTDOOR FROM PARAGRAPH ‘B’ or ‘C’ THEN
EDIT]
B.
Enclosure construction shall be NEMA Type 1 indoor.
C.
D.
Enclosure construction shall be NEMA Type 3R outdoor.
1.
Outdoor enclosure shall be non-walk-in and meet applicable NEMA 3R
UL requirements.
2.
Enclosure shall have a flat roof.
3.
Provide hinged cable entry trap door to allow cable access to generator
connection receptacles and lugs while maintaining Type 3R Enclosure
integrity.
4.
The enclosure shall be provided with bolt-on rear covers for each section.
5.
Doors shall have provisions for pad locking.
6.
Ventilating openings shall be provided.
7.
The outdoor enclosure shall be provided with a space heater having
adequate wattage to prevent the accumulation of moisture and shall be
thermostatically controlled. Power for the space heater shall be obtained
from a source as indicated on the Drawings. Supply voltage shall be 120
volts AC.
Bus Requirements:
1.
Switchboard bussing shall be rigid bus bars of silver-plated copper having
ninety eight (98) percent conductivity and shall be rated for a minimum of
one (1) square inch per one thousand (1,000) ampere capacity with a
maximum average temperature rise sized for UL at sixty five (65) degrees
C. over a forty (40) degrees C. ambient (outside the enclosure).
2.
The bus bars shall be rigidly braced to comply with the integrated
equipment rating of the switchboard. The neutral bus shall be full capacity
and sized as shown on the Drawings.
The bus bar supports,
connections, and joints are to be bolted with grade five (5) carriage bolts
and Belleville washers.
3.
A ground bus and lug shall be furnished firmly secured to each vertical
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GENERATOR QUICK CONNECT SWITCHBOARD
SECTION 16425
section structure and shall extend the entire length of the switchboard.
E.
F.
Wiring/terminations:
1.
The switchboard shall be provided with both mechanical lugs and camtype receptacle assembly for connection of generator power phases (A,
B, C), neutral and grounding conductors. All connections for phases,
neutral, ground, etc., shall be clearly marked via labeling.
2.
Each single pole cam-type receptacle shall be rated for no less than 400
amps at 90 degrees C. Multiple receptacles per phase, neutral and
ground shall be utilized when amperages over 400 are requested.
Contact material of the receptacle shall be composed of brass.
3.
Cam-type receptacles shall be male type, unless otherwise directed by
the Owner, and must be suitable for use in outdoor environments.
4.
Single pole Cam-type receptacles shall be UL 498 listed for Attachment
Plugs and Receptacles and UL 1691.
5.
Small wiring, necessary fuse blocks and terminal blocks within the
switchboard shall be furnished as required.
Control components
mounted within the assembly, such as fuse blocks, relays pushbuttons,
switches, etc., shall be suitably marked for identification corresponding to
appropriate designations on manufacturer’s wiring diagrams.
6.
Where applicable all control wire shall be type SIS, bundled and secured
with nylon ties. Insulated locking spade terminals shall be provided
integral to a device. All current transformer secondary leads shall first be
connected to conveniently accessible short-circuit terminal blocks before
connection to any other device. All groups of control wires leaving the
switchboard shall be provided with terminal blocks with suitable
numbering strips. Provide wire markers at each end of all control wiring.
Ratings: The switchboard’s system voltage and amperage shall be as indicated
on the Drawings. The switchboard, as a complete unit, shall be given a single
integrated equipment rating by the manufacturer of 65,000 (Engineer to edit)
amperes minimum or as determined by the Short-Circuit Coordination
Study whichever is higher and shall be so labeled. Such rating shall be
established by actual tests by the manufacturer on similar equipment available
and shall be furnished with the submittal. [ENGINEER, EDIT OUT SHORTCIRCUIT STUDY PORTION IF NOT IN PROJECT]
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GENERATOR QUICK CONNECT SWITCHBOARD
G.
SECTION 16425
Main Protective Device:
1.
Main protective device shall consist of a molded case circuit breaker as
indicated on the Drawings, equipped with individually insulated, braced,
and protected connectors, and single phase protection.
2.
The circuit breaker shall be operated by a toggle type handle and shall
have a quick-make, quick-break over-center switching mechanism that
shall be mechanically trip free from the handle so that the contacts
cannot be held closed against short circuits and abnormal currents.
Tripping due to overload or short circuit shall be clearly indicated by the
handle automatically assuming a position midway between the manual
"ON" and "OFF" positions. All latch surfaces shall be ground and
polished. All poles of a multi-pole breaker shall be so constructed that
they open, close, and trip simultaneously.
3.
The circuit breaker shall be completely enclosed in a molded case. Noninterchangeable trip breaker shall have the cover sealed; interchangeable
trip breaker shall have the trip unit sealed to prevent tampering. Ampere
ratings shall be clearly visible. Contacts shall be non-welding silver alloy.
Arc extinction shall be accomplished by means of arc chutes consisting of
metal grids mounted in an insulating support. Breaker shall be of the
bolt-on type; plug-in, plug-on, blow-on, and clamp-on circuit breakers
shall not be acceptable.
4.
Circuit breakers shall be 80% rated unless indicated on the Drawings to
be 100% rated.
5.
Circuit breaker shall have a minimum symmetrical interrupting capacity of
65,000 (Engineer to edit) amperes. The interrupting ratings of the circuit
breaker shall be at least equal to, or greater than, the available short
circuit at the line terminals and not less than those values shown on the
Drawings and specified in this specification section section or as
determined by the Short-Circuit Coordination Study whichever is
higher. [ENGINEER, EDIT OUT SHORT-CKT STUDY IF NOT IN
PROJECT]
6.
Circuit breaker shall be listed with UL, conform to the applicable
requirements of the latest issue of NEMA Standards Publication No. AB1.
7.
Circuit breaker frames 250 ampere and below shall have thermalmagnetic trip units, with inverse time-current characteristics, unless
otherwise indicated on the Drawings.
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GENERATOR QUICK CONNECT SWITCHBOARD
8.
9.
SECTION 16425
a.
Automatic operation of all circuit breakers shall be obtained by
means of thermal-magnetic tripping devices located in each pole
providing inverse time delay and instantaneous circuit protection.
b.
Circuit breaker frames shall be ambient compensating in that, as
the ambient temperature increases over 40° C, the circuit breaker
automatically derates itself to better protect its associated
conductor.
c.
Thermal-magnetic circuit breakers 250A and above shall have
thermal magnetic interchangeable trip units, unless otherwise
indicated on the Drawings.
Circuit breaker frames 400 ampere and above shall have
microprocessor-based RMS sensing trip units, unless otherwise indicated
on the Drawings.
a.
Solid State sensing shall measure true RMS current with
capability to measure through to the 21st harmonic. Automatic
operation of all circuit breakers shall be obtained by means of
solid state tripping elements providing inverse time delay and
instantaneous and short-time circuit protection.
Continuous
current rating shall be adjustable from 20% to 100% of trip unit
rating. Long-time delay and instantaneous trip ratings shall also
be adjustable. The short time pick-up trip shall have adjustable
pick-up settings at definite times and with I2t delay.
b.
Long time current adjustment shall be possible without the need
for a rating plug.
c.
Feeder circuit breakers shall be provided with integral ground fault
protection. Ground fault pick-up shall be adjustable form 20% to
70% of the breakers maximum continuous current rating, but in no
case be greater than 1200A. Ground fault time delay shall be
adjustable with three (3) I2t delay settings.
d.
Solid State circuit breakers shall have built-in test ports for testing
the long-time delay, instantaneous, and ground fault functions of
the breaker by means of a test set.
e.
Provide a test set capable of testing all circuit breakers with a
built-in test port.
Circuit breaker accessories: In addition to single-phase protection,
provide shunt trips, bell alarms and auxiliary switches, etc. as may be
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GENERATOR QUICK CONNECT SWITCHBOARD
shown on the Drawings.
installation.
SECTION 16425
All accessories shall be UL Listed for field
10.
Circuit breaker shall be manufactured by the same manufacturer as the
switchboard and factory installed.
11.
Where indicated, circuit breakers shall be UL listed for series application.
(ENGINEER TO EDIT OUT THIS PARAGRAPH IF NOT USING SERIES
CONNECTED BREAKERS.)
H.
Provide Key interlocks between Generator Switchboard Main and Normal source
breaker to prevent inadvertent interconnections and utility back feed or
paralleling of unsynchronized sources. Key interlocks shall be as manufactured
by KIRK KEY INTERLOCK COMPANY.
I.
All exterior and interior steel surfaces of the switchboard shall be properly
cleaned and provided with a rust-inhibiting phosphatized coating. Color and
finish of the switchboard shall be ANSI 61 gray.
2.03
NAMEPLATES
A.
Provide a switchboard designation engraved nameplate on the face of the
switchboard. Each device installed in the switchboard shall be identified with a
suitable nameplate, engraved as indicated on the Drawings. Engraved
nameplates shall be white phenolic with engraved black letters not less than 3/8"
block style. Each wiring termination assembly section shall also be identified
with an engraved nameplate i.e.: QUICK CONNECT RECEPTACLES,
GENERATOR INCOMING LUGS, GENERATOR BREAKER, etc.
B.
Furnish a master nameplate giving switchboard designation, voltage ampere
rating, short-circuit rating, manufacturer’s name, general order number, item
number and other manufacturer’s required information.
C.
Provide a set of permanent operating instructions affixed to the switchboard
having simple instructions for operation. Through the inclusion of these
instructions, any qualified generator technician can operate the mechanisms
include in the assembly.
2.04
A.
SURGE PROTECTION DEVICE
Provide surge protective devices (SPD) as specified in Section 16418.
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SECTION 16425
PART 3 - EXECUTION
3.01
3.02
INSTALLATION
A.
The switchboard shall be installed in accordance with the manufacturer's
recommendations and as shown on the Drawings.
B.
The Contractor shall furnish and install a four (4) inch high by six (6) inch greater
all sides (except rear when the switchboard is mounted against a wall) concrete
housekeeping pad for the switchboard.
C.
The assembly shall be provided with adequate lifting means and shall be
capable of being moved into installation position and bolted directly to
Contractor-supplied floor sills to be set level in concrete per manufacturer’s
recommendations. All necessary hardware to secure the assembly in place shall
be provided by the Contractor.
D.
Install units plumb, level and rigid without distortion to the switchboard cubicles.
E.
Switchboard wiring for factory mounted devices shall be installed complete at the
factory and adequately bundled and protected. All conductors across hinges,
and all conductors for interconnections between shipping units, shall be flexible.
F.
Contractor shall install required safety labels.
KEY INTERLOCKS
A.
Key interlocks shall be factory installed in the Generator Quick Connect
Switchboard. Key interlocks shall be factory or field installed in the “normal
source” main protective devices and shall not void the UL Listing of the “normal
source” protective device. If required, this Contractor shall have the “normal
source” device manufacturer’s authorized factory engineer or service technician
install the Contractor provided key interlock switch.
B.
The sequence of operation shall be such that there will be only one key for the
interlock sequence. To insert or withdraw the key the protective device must be
in the OPEN position with the interlock bolt engaged. To close the protective
device the key must be inserted and turned within the lock to withdraw the
interlock bolt allowing the protective device to CLOSE. When the protective
device is in the CLOSED position the key cannot be removed until the protective
device is once again in the OPEN position with the key turned to insert the
interlock bolt, locking the device OPEN.
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GENERATOR QUICK CONNECT SWITCHBOARD
3.03
3.04
3.05
SECTION 16425
START-UP SERVICE AND PERFORMANCE TEST
A.
The manufacturer shall provide factory personnel to completely inspect and test
the switchboard(s) for proper installation and operation of all equipment, at the
time of system start-up. Testing shall include, but not be limited to, performance
testing of the circuit breakers, TVSS, metering, single-phase protection, and
ground fault protection systems and equipment.
B.
All testing and start-up services shall be in the presence of the Engineer and the
Contract Owners Technical Representative (COTR). The tests shall be as
stated in the manufacturer’s literature. One (1) copy of the tests results shall be
submitted to the Engineer and Owner for review.
C.
The completed equipment grounding system shall be subjected to a metered test
at the switchboard ground bar to ensure that the ground resistance, without
chemical treatment or other artificial means, does not exceed five (5) ohms. One
(1) copy of the test results shall be submitted to the Engineer and Owner for
review.
D.
Check tightness of all accessible mechanical and electrical connections to
assure they are torqued to the minimum acceptable manufacturer’s
recommendations.
E.
Check the switchboard for proper grounding, fastening and alignment.
FIELD ADMUSTMENTS
A.
This Contractor shall perform field adjustments of the protective devices as
required to place the equipment in final operating condition. Necessary field
settings of devices and adjustments and minor modifications to equipment shall
be carried out by this Contractor at no additional cost to the Owner.
B.
(ENGINEER, DELETE THIS PARAGRAPH WHEN SECTION 16015 “SHORTCIRCUIT/COORDINATION STUDY” IS NOT USED). The settings shall be in
accordance with the approved protective device coordination study or as directed
by the Engineer.
TRAINING
A.
This Contractor shall provide eight (8) hours of technical service training to the
Owner’s technical and maintenance staff.
B.
The training session shall be conducted by a manufacturer’s qualified
representative. The training program shall consist of instruction on operation of
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GENERATOR QUICK CONNECT SWITCHBOARD
SECTION 16425
the assembly, circuit breakers, metering, and major components within the
assembly.
3.06
3.07
CLEANING
A.
Remove debris from switchboard and wipe dust and dirt from all components.
B.
Repaint marred and scratched surfaces with touch-up paint to match original
finish.
RISER DIAGRAM
A.
This Contractor shall furnish one (1) set of the complete as-built power riser
diagram showing all switchboards, panelboards, emergency electrical power
system equipment, and their interconnections. The riser diagram shall be
laminated and mounted by this Contractor as directed by the Owner at the
location of the main distribution switchboard or the generator quick connect
switchboard.
END OF SECTION
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