Siemens SIMOTICS HV C Operating And Installation Instructions page 70

Commissioning
7.1 Prior to commissioning
● Appropriately configured control and speed monitoring functions ensure that the motor
● The minimum insulation resistance values are within tolerance.
● Minimum air clearances have been maintained.
● Any supplementary motor monitoring devices and equipment have been correctly
● The values for "Warning" and "Shutdown" are set at the monitoring devices.
● All brakes and backstops are operating correctly.
See also
Technical data and drawings (Page 113)
● The bearing insulation should be implemented as shown on the plates.
Switching overvoltages
When high-voltage machines with starting current I
after they have been blocked, then in individual cases inadmissibly high switching overvoltages
for the stator winding insulation can occur through multiple restrikes.
The peak voltages which arise as a result can damage the winding insulation.
● If you are using vacuum circuit breakers and vacuum contactors, use an appropriate surge
● An additional RC arrester (resistor and capacitor connected in series) makes sense at
See also
Switching high-voltage motors (Page 25)
Current transformer
● Ensure that the secondary circuit of the current transformer is protected against accidental
Cooling
● Check that the machine cooling is available for commissioning.
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cannot exceed the permissible speeds specified in the technical data. See also the system-
specific documentation.
connected and are fully functional.
suppressor, such as the Siemens 3EF (zinc oxide varistor with spark gap).
unfavorable operating points/under unfavorable line supply conditions.
opening during operation.
≤ 600 A are switched off while starting or
A
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018