23
6.3 Switching -
Circuit breaker
Disconnector
Earthing switch
General information
• The switchgear may only be
switched by specialist electri -
cians. Specialist electricians in
terms of this provision are per-
sons who, due to their electro-
technical training , have knowledge
in the handling of medium-voltage
switchgear according to
EN 50110-1.
• Check whether the supply voltage
is ON.
• The switchgear can also be
actuated manually using the crank.
• After each switching operation for
which you have used a crank,
remove the crank and place it in
the instrument niche in the side
plate.
Important!
While the auxiliary circuit
is not available, blocking
coils (locking the interro -
gating levers and circuit- breaker
push-buttons, depending on
design), are in “locked” position.
An undervoltage release (optional)
has dropped out.
Charging the circuit-breaker’s
energy storing device
Initial position:
• Circuit-breaker “OFF“
• Energy-storing device:
“released”
Manual charging
1. Turn slide in the insertion opening
to the left, and insert crank.
2. Perform approx. 40 turns to the
right until the position indicator
indicates the “Charged” condition
(see Fig. 6.6)
(If the motor starts during this pro-
cess, this does not constitute a
risk.)
3. Remove crank and keep it in a
safe place.
Charging by means of a motor
The energy storing device is charged
automatically, as soon as the power
supply is available.
The position indicator of the energy
storing device indicates the
“charged” condition.
Fig. 6.4
Crank to charge the energy storing device
and to actuate the disconnector and earthing
switches
Fig. 6.6
Fig. 6.5
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