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
starting control or for excessively sensitive protection settings.
● Keep shutdowns during startup for checking the direction of rotation or other tests to an
absolute minimum.
Commissioning
7.5 Overvoltages when switching high-voltage motors
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
74 Operating Instructions 06/2018