Dear all,

Please find the attached trace file of Trace 2 wherein you can see the waveform of DC Current .

Every third pulse amplitude is smaller than first two pulse.

Also, The incoming current ( AC ) is un balance ( 100Amps difference).

Drive is 6RA70 1Q 2600 Amps, 690Volts incoming.

Please inform whether this is due to any hardware failure or behavior of load.

Rest all dc drives have balance current at incoming.

Need Expert Advice.

Regards,

Asgar