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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.

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