Panels with motor operating mechanism control
110-0134.9 / 14
NXAIR /
≤ 40 kA
385
Several electrical interlocks support safe electrical operation:
Operating option
Preconditions for operating option
Electrical interlock
Racking the withdrawable
circuit-breaker / circuit-breaker
truck electrically
•
Low-voltage connector plugged
on
•
High-voltage door closed
•
Feeder earthing switch in OPEN
position
•
Circuit-breaker in OPEN position
•
Access released for
motor-operated racking
•
Control door closed
During an ongoing racking
procedure, racking in opposite
direction
is interlocked
electrically.
During an ongoing racking
procedure, opening / closing the
circuit-breaker
is interlocked
electrically.
During an ongoing racking
procedure, opening / closing the
feeder earthing switch
is interlocked
electrically.
Opening / closing the circuit-
breaker electrically for testing
purposes
•
Low-voltage connector plugged
on
•
High-voltage door closed
•
Control door closed
•
Withdrawable circuit-breaker /
circuit-breaker truck
in test position
Opening / closing the circuit-
breaker electrically for testing
purposes is
not interlocked
electrically.
Opening / closing the circuit-
breaker electrically during
service
•
Low-voltage connector plugged
on
•
High-voltage door closed
•
Control door closed
•
Withdrawable circuit-breaker /
circuit-breaker truck
in service position
Opening / closing the circuit-
breaker electrically during service
is
not interlocked
electrically.
Opening / closing the feeder
earthing switch electrically for
testing purposes
•
Low-voltage connector plugged
on
•
High-voltage door closed
•
Control door closed
•
Withdrawable circuit-breaker /
circuit-breaker truck
in test position
Opening / closing the feeder
earthing switch electrically for
testing purposes is
not interlocked
electrically.
Closing the feeder
earthing switch electrically
during service
•
Low-voltage connector plugged
on
•
High-voltage door closed
•
Control door closed
•
Withdrawable circuit-breaker /
circuit-breaker truck
in service position
Closing the feeder earthing switch
electrically during service
is
interlocked
electrically.