GE ABB ReliaGear SB, Инструкция по установке, эксплуатации и обслуживанию

Страница: 22 / 32

22
R E LI AG E A R® S B
S W I TC H B OA R DS
—
43
—
43
Cable Brace – Front View,
tying the main cables
to the cable brace
For circuit breakers and accessories, refer to
the individual instruction manuals provided
with each device (refer to document numbers
on page 26).
Circuit breaker installation and removal molded
case circuit breakers
To install a group-mounted molded case circuit
breaker, refer to the following
video .
Draw-out insulated and/or power circuit breakers
To install a draw-out PowerBreak II circuit breaker,
refer to document GEH6271.
Cable brace
To install the main cables when a cable brace is
provided, follow these steps. Align the conduit
holes linearly directly over, or as close as possible,
to the braces. Consider installing any conduits or
sleeves that may be required for future connections
also. Run and bend the main cable in the most
convenient orientation, ensuring that the main
cable has been located directly up against the
cable braces before it connects to the main cable
terminals. Lash the main cable as shown in Figure
43, using a 3/8-inch nylon rope or a polyester
braided rope having a minimum tensile strength of
2000 lb. Make six revolutions around the A and B
phase main cables and six revolutions around the B
and C phase main cables. Continue wrapping the
cord around the main cable lashing and around the
cable braces, if applicable, between the phases.
Tie a knot to the cable brace or cable as the last
revolution is completed. All revolutions must be
as tight as possible to prevent whipping during
a short circuit event. For GenTower connections,
it is recommended that all cables outside the
equipment be secured together with at least six
revolutions and a span of 15 inches between
secured lengths. The rope is not provided.
DANGER
WARNING
CAUTION
NOTICE
SAFETY
INSTRUCTIONS
Warning:
The equipment must be adequately
grounded so that all parts of the equipment, other
than live parts, are at ground potential. Failure to
observe this precaution can result in serious
injury or death.
Installation: Accessories and devices
During and after the cable installation, observe
the following rules:
• To prevent heating, avoid closed loops of steel
around a single conductor or group of conductors
that does not include all the conductors of the
circuit, including the neutral
• If the conductors must pass through separate
holes in a piece of steel, cut slots between
the holes
• Do not allow cables carrying high currents to
come near instruments or meters, as this may
affect their accuracy
• Use the minimum length of cable necessary to
make the connections. The increased resistance
of longer cables generates unnecessary heat
• Inspect main cable lashing annually
For ABB Spectra Busway installation into ReliaGear
switchboards, see busway publication DEH40087.
Cable
brace
15"
maximum
Main cable
terminals