12/18/2008 3:05 PM | |
Posts: 18 Rating: (12) |
There is a configuration of 2 Parallel RRU with 2 parallel inverters for Sugar Mill aplication.The MLFB of them are- Master Converter: 6SE70413EK850AA0 Parallel Converter: 6SE70413EK850AD0 Master Inverter : 6SE70386TK863AE0 Parallel Inverter: 6SE70386TK864AE0 The problem is that Master Converter (RRU)trips on F034.The tripping behaviour is very abnormal & sometimes the system runs fine for 1-2 days withou tripping but sometimes it trips 10-12 times in a day.We have checked I/P power supply condition with the help of Power Analyzer & found it to be satisfactory.We carried out following job- 1. Changed A23 of Parallel converter(Power Interface Card), but tripping is still there 2.We did cold test for Thyristors in RRU's & doubted on R-phase Thyristor in Master RRU & replaced the same , but still tripping is there. Can any one suggest some action regarding this triping because this problem is there from last 3 years but this year the tripping frequency has increased a lot.DNL file of RRU attached for reference. AttachmentNew Folder (3).zip (190 Downloads) |
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