Panels with motor operating mechanism control
402 NXAIR / ≤ 40 kA 110-0134.9 / 14
27.10 Racking the withdrawable circuit-breaker / circuit-breaker truck to test position electrically
Maloperation
Racking the withdrawable circuit-breaker / circuit-breaker truck is only permissible
if the circuit-breaker is in OPEN position.
Check if the circuit-breaker is in OPEN position.
If required, switch the circuit-breaker to OPEN position before racking.
Maloperation
Electrically racking the withdrawable circuit-breaker / circuit-breaker truck is only
possible when both the high-voltage door and the control door are closed. If the
control door is open during an electrical racking procedure, the motor stops
immediately.
Do not open the control door during an electrical racking procedure.
Conflicting operation
Racking the circuit-breaker / circuit-breaker truck electrically is possible locally or
from a central control. The requirement of setting the panel to either local or
remote control prevents operating the panel locally and centrally at the same time.
Depending on the intended operating mode, set the panel to either local or
remote control (for example by switching the local-remote switch).
Preconditions
• Withdrawable circuit-breaker / circuit-breaker truck in service position
• Circuit-breaker in OPEN position
• Remote or local control
• Control door closed and padlocked
• Access mode indicator for racking shows "M"
Procedure
Rack the withdrawable circuit-breaker / circuit-breaker truck electrically to test position either
locally or from the central control.
The withdrawable circuit-breaker / circuit-breaker truck has been electrically racked from
service position to test position.
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