Operating The Switchgear - ABB GE Entellysis Installation, Operation And Maintenance Manual

7. o p e r aT I N G T h e s w I TC h G e a r

7. Operating the switchgear

7.1 Circuit breaker operation
General
Included below are abbreviated operating
instructions for EntelliGuard circuit breakers.
Before activation of the circuit breakers or
operation of the switchgear equipment, thoroughly
read, and be familiar with the circuit breaker
manuals which will be supplied as supplementary
information to this manual. Publication number
is DEH-41304 (AKD-20 Only) or DEH-41526
(Entellisys Only).
Manually operated circuit breakers
Closing operation
Manually operated EntelliGuard circuit breakers are
equipped with a integral charging handle and a
push button marked CLOSE on the front of the
escutcheon. The spring must be charged first.
• A complete charge is accomplished by pulling the
handle down about 90° (until it stops) ten times
to fully charge the closing springs. This will not
close the breaker contacts. The charge indicator
will show CHARGED on a yellow background.
Opening Operation
A mechanically operated OPEN button mounted on
the breaker escutcheon, operates the trip shaft to
open the breaker.
Opening operation (Entellisys only)
The Entellisys HMI may also be used to electrically
open the breaker.
Electrically operated circuit breakers
closing operation
Electrically operated breakers may be closed by
ac control power, or dc (normally station or standby
battery) control power. Refer to the provided
elementary diagrams for information on
control circuitry.
Closing operation (Entellisys only)
The Entellisys HMI may be used to electrically close
the breaker.
Opening operation
A shunt trip device is used for electrical tripping
and each breaker can have up to two shunt trip
accessories installed.
Opening operation (Entellisys only)
The Entellisys HMI may also be used to electrically
open the breaker.
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