Areva WSB - Page 25

25
Disconnector Operating sequence for discon-
nector and earthing switches
Earthing switch
*) Important!
Intertripping circuit:
The circuit-breaker is switched
ON automatically after reaching
its earthing position. The “OFF” actua-
tion of the circuit-breaker is blocked.
To switch off, proceed analogously.
The circuit-breaker is first switched off
automatically.
Fig. 6.11
Initial situation:
Circuit-breaker OFF
Disconnector OFF
Earthing switch OFF
Switching ON manually:
1. Turn interrogating lever to release
the appropriate insertion opening.
2. Insert crank and turn it clockwise
10 times. The position indicator
shows “ON”.
3. Remove crank.
Switching OFF manually:
1. Turn interrogating lever to release
the appropriate insertion opening.
2. Insert crank and turn it counter-
clockwise 10 times. The position
indicator shows “OFF”.
3. Remove crank.
Important!
Motor drive (optional):
The motor current circuit is
interrupted while the inter -
rogating lever is being actuated or
while the crank is inserted in its port.
Fig. 6.13 Disconnector “ON”
Fig. 6.15 Disconnector “OFF”
Fig. 6.12
Fig. 6.14 Disconnector “ON” *)
Fig. 6.16 Earthing switch “OFF”