SECTION 26 24 13
TEMPORARY GENERATOR QUICK CONNECTION SWITCHBOARD
PART 1 - GENERAL
1.1
DESCRIPTION
A.
This section specifies the furnishing, installation, connection, and testing
of a low-voltage temporary Generator Quick Connection Switchboard, indicated
as “switchboard” in this section.
B.
Generator Quick Connection Switchboard shall be designed to allow quick and
safe connection of a mobile generator set to facilities experiencing loss of
power. Permanent installation and connection of the switchboard to the
facility power distribution system will minimize any unplanned power
outages.
1.2
RELATED WORK (NOT USED)
1.3
QUALITY ASSURANCE
A.
1.4
A.
1.5
Manufacturer: For equipment required for the work of this section, provide
product which is the responsibility of one manufacturer.
FACTORY TESTS
Perform factory and installation tests in accordance with applicable NEC,
NEMA and UL requirements.
SUBMITTALS
A.
Product Data: Submit manufacturer's printed product data.
B.
Drawings: Submit shop drawings for approval. Include components, materials,
finishes, detailed plan and elevation views, required breaker and cam type
openings, anchors, and accessories.
1.6
APPLICABLE PUBLICATIONS
A.
Publications listed below (including amendments, addenda, revisions,
supplements and errata) form a part of this specification to the extent
referenced. Publications are referenced in the text by basic designation
only.
B.
National Electrical Manufacturer's Association (NEMA):
PB-2-06.................Deadfront Distribution Switchboards
PB-2.1-07...............Proper Handling, Installation, Operation, and
Maintenance of Deadfront Distribution Switchboards
Rated 600 Volts or Less
C.
National Fire Protection Association (NFPA):
70-11...................National Electrical Code (NEC)
D.
Underwriters Laboratories, Inc. (UL):
489-09..................Molded-Case Circuit Breakers, Molded-Case
Switches, and Circuit-Breaker Enclosures
891-05..................Switchboards
26 24 15 - 1
PART 2 - PRODUCTS
2.1
A.
2.2
A.
GENERAL
Shall be in accordance with NEMA, NFPA, UL, as shown on the drawings, and
have the following features:
1.
Switchboard shall be a complete, grounded, continuous-duty, integral
assembly, dead-front, dead-rear, self-supporting, outdoor type
switchboard assembly. Incorporate devices shown on the drawings and all
related components required to fulfill operational and functional
requirements.
2.
Switchboard shall be supplied as a complete system and shall include
all the necessary components and equipment to accommodate described
system operation unless otherwise noted.
3.
Switchboard shall conform to the arrangements and details shown on the
drawings.
4.
Switchboards shall be assembled, connected, and wired at the factory so
that only external circuit connections are required at the construction
site.
5.
All non-current-carrying parts shall be grounded.
6.
Packaging shall include the switchboard to be shrink wrapped and
mounted to a skid and to provide adequate protection against rough
handling during shipment.
HOUSING
Frames and enclosures:
1.
Enclosure shall be designed according to NEMA 3R standard for outdoor
operation which includes a sloped roof.
2.
Floor standing, manufactured from Carbon Steel, Aluminum, or Stainless
Steel with:
1.
Frame - 11 gauge
2.
Roof and Front Door - 12 gauge
3.
Rear and Side Sheets - 14 gauge
3.
Enclosure shall be of rigid frame construction.
4.
The enclosure shall include a full front door with a two point latch to
access permanent cables and an integral lower flip open door to allow
cable connection of the portable generator set.
5.
The access door shall have full height left or right hinge to allow
easy access to the switchboard ‘cam-lok’ type connections for cable
connections to the mobile generator or site loads. The bottom portion
of the door shall have an additional horizontal hinge to allow for the
door to be closed while cables are connected. The hinged bottom
portion of the door shall flip up to the extent needed to accommodate
the cable entry/exit while providing the drip shield for the components
inside of the enclosure.
6.
Stainless Steel exterior hardware shall be utilized.
7.
One (1) padlockable handle on full front door and One (1) padlockable
handle on lower flip door.
8.
Internal Climate Control to include two (2) Space Heaters shall be
controlled by Thermostat and Humidistat; requires customer supplied
120VAC, 10A circuit.
9.
For ease of on-site cable connections and maintenance an open bottom,
removable full depth side sheets and rear sheets shall be provided.
10. For ease of the switchboard service, maintenance and future upgrades,
all the support structures, braces and cover sheets for the circuit
breakers, main bus, neutral bus, ground bus and circuit breakers runback extension bus shall be removable and attached to the frame via
bolts.
26 24 15 - 2
B.
Markings and Nameplates:
1.
Each switchboard section shall have a label permanently affixed to it,
listing the following information: Name of manufacturer, system
voltage, ampacity, type, and manufacturer's shop order number.
2.
Switchboard shall bear a UL891 listing mark as Type 3R equipment for
outdoor use in Carbon Steel, Aluminum, or Stainless Steel construction.
3.
The nameplates shall be produced from clear textured polycarbonate,
laminated on high performance pressure sensitive adhesive. The
printing shall be done on the interior surface of the laminate to avoid
scratching or other deterioration of text. The lettering shall be
white on black background.
4.
Each control switch, indicating light or other component mounted on the
inner panel shall be identified by a nameplate.
C.
Finish:
1.
One (1) powder coat of ANSI 61 Light Gray shall be applied to all
interior and exterior surfaces.
2.
The final finish must be exterior rated for NEMA 3R use.
2.3
A.
2.4
BUSES
Silver plated copper busbar shall be used for “permanent” cable connections
to the facility via the (removable) side or rear sheets of enclosure.
‘CAM-LOK’ TYPE CONNECTORS
A.
‘Cam-lok’ type connectors shall be NEMA 3R rated so as to be used in direct
rain should the door become open.
B.
Each
with
1.
2.
3.
4.
5.
2.5
color coded, male ‘Cam-lok’ E1016 compatible single pole receptacles
cover shall be color coded per:
A phase – Brown
B phase – Orange
C phase – Yellow
Neutral – White
Ground – Green
CIRCUIT BREAKERS
A.
Temporary Generator Circuit Breaker:
1.
Switchboard shall be equipped with One (1) Manually Operated Circuit
Breaker shall be (Fixed Mount), 100% Rated, Insulated Case Circuit
Breaker, with (LI) solid state trip unit, stored energy mechanism, and
“a” and “b” aux. contacts.
2.
Interrupting Rating:
a.
For a circuit breaker rated under 2500A, interrupting rating shall
be (65kA)@480VAC.
b.
For a circuit breaker rated at 2500A and up, interrupting rating
shall be (100kA)@480VAC.
3.
Circuit Breaker Shunt Trip - 120VAC shall be provided.
B.
Circuit breaker ratings shall be as indicated.
2.6
ANNUNCIATION
A.
All indicating lights shall be located behind full front door.
B.
All indicating lights shall be of high visibility, LED type with lenses of
at least 1 inch outside diameter with service life of 100,000 hours at 77°F
temperature.
26 24 15 - 3
2.7
GROUND FAULT PROTECTION
A.
Include in the switchboard, ground fault protection and indication
equipment. All parts of the systems specified shall be UL Listed.
B.
All ground fault protection and indication equipment shall be factory
installed, wired and tested by the switchboard manufacturer.
2.8
PHASE ROTATION MONITORING
A.
Phase Rotation Monitoring shall ensure portable genset phase rotation
matches that of the facility.
B.
An indicating light shall provide visual assurance of correct phasing.
C.
Circuit breaker shall be prevented from being closed if phase rotation is
incorrect by operating the shunt trip coil.
D.
Instructions to easily fix incorrect phase rotation shall be included on a
label inside each panel.
2.9
INTERLOCKING
A.
Interlock between facility main service circuit breaker and temporary
generator circuit breaker shall be to prevent inadvertent paralleling of the
Utility and Temporary Generator.
B.
The Kirk Key shall be removed from the facility circuit breaker (customer
supplied Kirk Key lock) to hold circuit breaker in ‘open’ position, and to
be inserted in the Temporary Generator Breaker to allow connection of the
generator to the facility.
C.
Customer shall provide site specific Kirk Key information.
2.10
ALTERNATE CONNECTIONS
A.
Alternate busbar connections with NEMA standard hole pattern and mechanical
lugs shall be provided for use in the event a mobile genset is used that
does not have cables with ‘Cam-lok’ E1016 compatible plugs.
B.
Alternate busbar connections shall be accessible through a removable piece
of sheet metal. Cables shall enter the switchboard via the integral lower
flip door to connect to the alternate connection area.
2.11
SEQUENCE OF OPERATION
A.
Should the Utility fail, the facility’s main breaker would be manually
opened and the portable generator set would be connected to the ‘Cam-lok’
type receptacles in the panel located behind lower flip door.
B.
The Temporary Generator Connection Circuit Breaker would be manually closed
to allow the temporary generator to provide electrical power to the facility
load.
C.
Upon restoration of the Utility’s power, the Temporary Generator Connection
Circuit Breaker would be manually opened to allow for the closing of
facility’s main breaker to restore the facility to the normal Utility power
source.
26 24 15 - 4
PART 3 - EXECUTION
3.1
A.
INSTALLATION
Install switchboards in accordance with the NEC, as shown on the drawings,
and as recommended by the manufacturer.
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26 24 15 - 5