ABB K-Line Plus, Installation And Maintenance Instructions Manual

Page: 48 / 65

K - L i n e P l u s
41
Placing Switchgear into Service
S
AFETY
P
RECAUTIONS
DANGER
There are hazards of electrical shocks and/or burns whenever working in or
around electrical equipment. Turn off power ahead of the switchgear before
performing any maintenance operations. Check incoming line terminals to
verify that the equipment is de-energized. Check out-going terminals to
ensure that no back-feed condition exists.
The circuit breakers should be in the
TEST
position. When working
on switchgear, de-energize and ground the main bus.
Before energizing any part of the switchgear make a complete check of
mechanical operation of all devices. Remove blocking wedges from
relays, circuit breakers, meters, etc. Manually operate all circuit
breakers and relays. Moving parts should not bind. Verify that there
are no foreign objects in the rear of the equipment. Use an air hose to
clean all inside and outside surfaces.
The secondary circuits of energized current transformers should never be open
circuited.
Chapter
7