Maintenance
Intervention on the FK3- 4 operating device
GE Information
L51- 303EN/05
3/10
11- 2016
Safety measures
Circuit- breaker
general preparing
The table below gives the steps to prepare the circuit- breaker to work safely :
Step
Action
Comment
1
Isolate the circuit- breaker from
the network.
Shut down the circuit- breaker,
de- energize and earth it.
2
Switch- off the supply circuit of
the reloading motor.
3
Check the SF
6
pressure gas.
Make sure that the SF
6
pressure
gas is
p
me
.
Below this level, no mechanical
operating is allowed.
Release the springs
The table below gives the procedure to release the closing spring and the
opening spring depending the circuit- breaker state :
If the circuit- breaker
position is ...
Action
Closed
In the operating device, activate the
opening handle and the closing han-
dle like below :
1
- Open
2
- Close
3
- Open
Open
Activate the closing handle and the
opening handle like below :
1
- Close
2
- Open
Check the optical
signalization
Check that the operating mechanism’s optical signalization shows the sym-
bols below :
Circuit- breaker
Open
Closing spring
Released
Содержание SF6
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