Opening The Contactor Electrically - Siemens NXAIR Operating Instructions Manual

14.10 Opening the contactor electrically

Preconditions
•
Contactor truck in service position or in test position
•
Contactor in CLOSED position
•
High-voltage door closed
•
Auxiliary voltage for the panel connected
•
Remote or local control
Procedure
Open the contactor via central or local electrical control command element.
Fig. 283: Position indicator for contactor in OPEN position
✓
The contactor is open.
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Operating the contactor panel with panel width 600 mm
NOTICE
Conflicting operation
Operating the contactor 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).
INFORMATION
Unexpected switching noise and vibration
Operating the contactor causes a short loud noise and low vibration.
Expect switching noise and low vibration from inside the contactor.
INFORMATION
Contactor truck version with mechanical closing latch
Opening the contactor also opens the closing latch.
NXAIR / ≤ 40 kA
161