VVVF Controlled Motor Tripping

Based on your information it is ACS800 multidrive with two inverter module.

Does it show number of inverter causing current unbalance?

Check DC link votage going to Inverter Module a difference of few volt can also cause the problem.

Regards

Bharat

DC link voltage is same

I will give some more details of the drive

ACS800-04-0870-3+E205+V991

Inverter

Input U 513...587 VDC

I 889 ADC

Output U 3 ˜ 0...415 V

I 741 A

f 0...300 Hz

Line converter

Input U 3 ˜ 380...415 V

I 630 A

f 48...63 Hz

Output U 3 537.....587 Vdc

I 764 ADC

With regards

jcg

Maybe you can check ACS800 setting.

if running with an encoder check it, try running open loop (without the encoder) and see if you get a trip

Your both the drive units are individualy running ok, means the control going to both the Drives through APBU (DDCS Branching unit) may be the problem OR Optical cable missing the signal.

Thanks,

sukhvinder singh

JK-PAPER LTD, RAYAGADA

We replaced a working APBU from other units but the problem is showing again (tripping happening after some time of the motor running only )

With regards

JCG