My PFC IGBT is blown again and again. I had tryed 60Amp and 1200Vots IGBTS. I also changed it OPto,s as well SG3525, and SG3854 with lm358N and c40660B. But problem did not reslove yet. now can you send actual parts value or schematic with test points Please answer me on my email
Computers & Internet - Liebert - UPStation GXT 2U GXT2-1500RT120 UPS System
Answers & Comments
Check the rectifier diodes (4 x 1N4148) after the current transformer feeding the PFC circuit. Could also be PFC inductor problem.
Fixya is not associated with any manufacturer. So unless someone here happens to have the schematic you would have to get that from Liebert/Emerson.
Unless the igbt's are being overloaded then the usual suspect area is the driver/switching. Usually that section fails and they latch on and POP.