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15.3 OPERATION OF VACUUM CIRCUIT-BREAKER - 12kV/25kA, 24kV/20kA
Push button - vacuum circuit-breaker (OFF)
Push button - vacuum circuit-breaker (ON)
Indication -
spring charged / discharged
Counter - closing and opening
operations
Vacuum circuit-breaker position indicator
Spring-charging lever
Before operating of the vacuum circuit-breaker, check that
the spring is charged. If the spring is not charged, it can be
charged by means of the charging lever. The spring is fully
charged when the indicator turns to charged spring
(yellow symbol, about 10 operations needed to fully charge
the spring).
CAUTION
If the vacuum circuit-breaker is equipped with motor
operation (optional) it is not necessary to charge
the spring by hand. The motor starts charging the
spring automatically as soon as the auxiliary volta-
ge is switched on.
Close: Push green (ON) button
Open: Push red (OFF) button
Note: the downstream disconnector is mechanically
interlocked with the vacuum circuit-breaker.
For operation of the downstream disconnector and earthing
switch, see previous page.
