Earthing / De-Earthing The Feeder Manually - Siemens NXAIR Operating Instructions Manual

27.14 Earthing / de-earthing the feeder manually

Earthing / de-earthing the feeder manually is carried out by inserting a lever through an actuating opening in
the high-voltage door, and turning it subsequently. Depending on the turning direction, the feeder
earthing switch in the connection compartment is set to either CLOSED (= earthed) position or OPEN (= de-
earthed) position.
Earthing / de-earthing the feeder manually can only be carried out when the control door is open. However,
the indicator for the feeder earthing switch position can still be seen through an inspection window after
closing the control door.
Fig. 735: Circuit-breaker
type 3AE1:
Control elements for
feeder earthing switch on
high-voltage door
Fig. 737: Circuit-breaker type 3AE1:
Inspection window for feeder
earthing switch position
in control door
110-0134.9 / 14
Panels with motor operating mechanism control
1
2
3
Fig. 736: Circuit-breaker type
3AE5:
Control elements for feeder
earthing switch on
high-voltage door
,
Fig. 738: Circuit-breaker type 3AE5:
Inspection window for feeder
earthing switch position
in control door
NXAIR / ≤ 40 kA
Operating slide for
opening and closing
(1) the actuating opening
for operating the
feeder earthing switch
Mechanical position
(2) indicator for feeder
earthing switch
Actuating opening for
(3) operating the feeder
earthing switch
407