DC-Busbar Undervoltage ridethrough / Current Unbalance (2330)
I am working on the vessel where we use drives ACS800-104LC - cooled by water system. The drives are on the thrusters system.
On the thruster we had 6 drives which are supply electrical motor (2500kW).
During normal DP operation (thruster use up to 20% of the power) the system tripped.
On the main simatic panel we had information:
2085 A: DC-Busbar undervoltage ridethrough alarm
2017 F:Trip IMMINENT (3s)
On the drive panel: Fault - Current Unbal 6 (2330)
We perform all the test including motor checks, cable checks, drive checks etc. : Did not found any abnormalities.
We resteted the fault,started thruster again and it is working already 18 hours without problem.
We monitoring thruster via Drive Window and could not see any problems.
I'm wondering what could be the reason of that trip.
Apologize for my question but I do not understand "the ridethrough alarm".
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