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Entry type: FAQ Entry ID: 51711048, Entry date: 04/04/2016
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SINAMICS G120: Ground fault detection for the PM230, PM240, PM250, PM260 and PM340 Power Modules

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Possible incorrect measurement when detecting a ground fault

Under no-load conditions, for the Power Modules with maximum cable length and a pulse frequency higher than 8 kHz, it is possible that a phase-ground fault between the converter and motor is not detected and the device continues to operate.

The ground fault is immediately detected when the motor accelerates and the converter trips with overcurrent (F0001).

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