A bushing failed on a 50/60MVA 110/20kV ONAN/ONAF transformer during FAT yesterday. The failure occurred a few seconds into the high voltage 50Hz test after the transformer tank had been on pressure test for about 16 hours. The porcelain surrounding paper insulation on the inner side of the...
We have a 1000kVAR de-tuned 11kV PFC bank and want to de-rate it to 400kVAr. It consists of air cored reactors in series with five capacitors. It was not designed to correct for specific harmonics. Is there any reason why we cannot simply disconnect three of the capacitors?
Designing a 10kV generator installation with about 300 meters between alternator and breaker. Concerns raised that cable length may be aproblem. Apart from burden on CT's which is OK are there any factors e.g. capacitances that limits cable length.
Thanks.
Anybody can relate experience ( good or otherwise) with refined product radar tank gauging systems such as Endress & Hauser FMR5xx , Saab -Rosemount REX RTG3xxx.
Thanks in anticipation.
We are installing an FM200 system. A customer's engineer raised a concern about having the FM200 bottles in the manned control room. He said he read somewhere that FM200 bottles should not be located in manned control rooms.
We can't easily relocate except outdoors which I think is a bad...
I am looking into how to estimate if I can energise a large unloaded transformer load, about 50MVA made up of individual 1 to 4MVA units. When the mains fails all the LV loads will be shed throughout the factory.
So far I have been able to test with 16MVA with no problem. The remaining load is...
I read an embedded generator can be connected in parallel with utility using a duplex reactor to isolate the site load from grid faults. Embedded generator is running continuously ( Heat & power plant).
Can anyone advise how to design this reactor or recommend an expert with experience. Our...
