9/5/2014 6:46 PM | |
Posts: 32 Rating: (0) |
Dear Sir,This is regarding the query about Perfect harmony problem, The perfect harmony drive is of Gen 3, 1600KW,2500KVA,260A The problem is this drive is not running continuously on bypass mode, There are 6 cells/phase. In Rack B there is one cell faulty, on become one cell inactive the bypass contactor has picked & Drive run successfully, but after running 15 days, intermediately/unpredictably/atanyload the Bypass acknowledge failed fault comes who energies the Bypass fault & Drive shutdown on this fault,For avoid this fault I have replaced the Bypass relay board, Power supply to bypass relay board, OFC cable of Modulator board to Bypass relay board, Modulator board & By pass contactor also with new one.But the result is same, Fault comes intermedietely & uptill now this faults happens more than 5 times.Now What could be the reason from which the drive trips intermediately?One more query parallel to this, How the sensing is going (Complete Process) to modulator board that whether the Bypass contactor has hold or de-hold?You are request to please go through it & Suggest your valuable answer. For your reference parameter upload is attached. Regards Neeraj AttachmentBag_House_Fan_Parameter.pdf (514 Downloads) |
9/9/2014 10:38 AM | |
Joined: 3/17/2013 Last visit: 8/25/2024 Posts: 481 Rating: (43) |
One time I had the same issue but problem fixed afte replacing FOC between modulator board and bypass board. If it is air cooled, some times dust accumlation on FOC end connectors also causes this. |
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