Siemens SIMOTICS HV C Operating And Installation Instructions page 74

Commissioning
7.5 Overvoltages when switching high-voltage motors
These consequences are independent of the motor size and quenching principle of the switch
used, i.e. they can also occur when using minimum oil,SF6- or air-blast switches.
● Avoid shutting down the machine during startup by, for instance, checking for errors in the
● Keep shutdowns during startup for checking the direction of rotation or other tests to an
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starting control or for excessively sensitive protection settings.
absolute minimum.
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018