RECONDITIONING
REV6 /REV6 OI 248 (EN) 73
10 Reconditioning
Isolate and ground (earth) the breaker:
• Discharge the closing and opening springs.
This state is reached when the position indicator shows OPEN
and the spring position indicator is on "discharged." The
operations shown in the table below are required to reach this
state, depending on the starting situation.
• Disconnect the supply voltage to the motor.
The equipment should preferably be reconditioned in closed, dry,
dust-free rooms. If this is not possible and the equipment has to be
reconditioned outdoors, then it should only be done in dry weather
when there is no wind.
The circuit breaker is equipped with a disconnect (isolating point)
between the interrupter chamber and the post insulator. All inter-
rupter chambers are interchangeable. This design makes it pos-
sible to replace entire interrupter chambers quickly and then
recondition the interrupter chambers in closed rooms.
All functional elements must be inspected and cleaned with a
cleaning cloth soaked in alcohol.
If sealing bonds or gasketed joints are opened during these opera-
tions, then the respective elastomer gaskets or seals must be re-
placed.
Danger due to electric shock.
Therefore:
- Disconnect the breaker from the high voltage system, and
ground (earth) the breaker at both ends.
Danger due to suddenly moving linkages.
Therefore:
- Discharge the closing and opening springs by carrying
out closing and opening operations.
Breaker Position State of the
Closing Spring
Operations to Be
Executed
CLOSED / I Charged O-C-O
CLOSED / I Discharged O
OPEN / 0 Charged C-O
OPEN / 0 Discharged No operation required
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