Circuit Breaker Overhead; Operation Of The Circuitb; Lifting Device; Unit Substations - ABB K-Line Plus Installation And Maintenance Instructions Manual

K - L i n e P l u s
O
PERATION OF THE
L D
IFTING EVICE
Observe the following requirements when operating the circuit
breaker lifting device.
1.
The wheels must be properly set on track.
2.
Do not depend upon the drum attachment to support full weight.
Allow 4-5 wraps of wire rope to remain on the drum.
3.
Prevent snarling, kinking or knotting the wire rope.
4.
Lift only circuit breakers.
5.
Do not alter the lifting device or the circuit breaker lifting yoke.
6.
Never walk or stand under a circuit breaker suspended by wire
rope.
7.
Do not leave a circuit breaker suspended on the wire rope.
U S
NIT UBSTATIONS
Unit substations are power transformers with primary and secondary
switchgear. They are field assembled to make a complete unit. Install
the transformers and switches next to the switchgear as shown on
coordination drawings.
In multi-unit substations, physically identical transformers may have
disconnect switches that are key interlocked with secondary breakers.
Group the disconnect switches, transformers and switchgear sections
by their key interlock. The interlock sequence depends upon having
the locks on the switch and breaker operated by the same key.
Avoid unnecessary rework by checking the key numbers before moving each piece
of equipment into its final position.
C B
IRCUIT REAKER
19
O
VERHEAD