Troubleshooting; First Closing Operation - Siemens 3TM Operating Instructions Manual

Operation
Checklist
Check the unlatching. If manual unlatching (EMERGERNCY-STOP) via
the push rod or draw bar is not available, the shunt release (-Y1) can be
manually actuated in a de-energised state and for test purposes (see
Fig. 8 on p. 16).
Test the electric switching repeatedly before the vacuum contactor is put
into operation in the network.
Incident
Vacuum contactor does not
respond
Closing is blocked
Failure of the supply voltage
U
a
Defective shunt release
Vacuum contactor does not
return to the starting position
or the initial state
Vacuum contactor does not
latch
Manual unlatching is blocked
36
WARNING
Do not commission the vacuum contactor if there are malfunctions.
If the malfunctions or damage cannot be remedied, contact a sales representative
or Siemens Service and, if necessary, send back the vacuum contactor in the
original packaging.

Troubleshooting

Troubleshooting
• Check the DIP switch S2 position and reset if necessary (see matrix Fig. 44).
• Send it back to the manufacturer
• Check the connectors on the electronic controller for a firm seat.
• Check the cable connection to the connectors.
• If a new vacuum contactor is installed, use only the connectors provided in
the accessory pack (see p. 30).
• Order a spare part and mount according to the supplied instructions.
• Inspect the contact welding and remedy by means of no-load switchings.
• For existing closing latching, actuate the manual unlatching (no-load switch-
ing permissible).
• Send it back to the manufacturer
• Check that the unlatching mechanism is attached to the coupling point and
reattach with max. 4 Nm. While doing so, prevent the threaded rod from twist-
ing.
1) Complete vacuum contactor

First closing operation

If all functions have been checked and are OK, switch on the high voltage while ob-
serving all of the safety regulations and operational requirements.

1)
.
1)
.
Notes
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2019-01-09