Tranformer Bank Busted
Tranformer Bank Busted
(OP)
Hello folks, there is one situation I got and I am into it as a matter of technical interest. A transformer was operated at Open wye - open delta operation. The bank of 3-333kva transfo was busted. An explossion was heard and it shut down the whole plant. After visually inspected and tested, found out that one of the transfo terminal was lossen. They asked a contractor for repair and rewind and it is going to cost them $4,500. What can you suggest about this situation? For any development. This bank 3-333kva transformer is an aged old installation of this industrial plant.
GO PLACIDLY, AMIDST THE NOISE AND HASTE-Desiderata






RE: Tranformer Bank Busted
Having said that, I'm guessing that the bank ended up with only 2 transformers working which changed the bank from being a 1MVA to a 666kVA transformer bank. Then, the operating transformers were overloaded and eventually one failed. If this is the case, a better protection scheme for the individual transformers would be in order.
RE: Tranformer Bank Busted
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Tranformer Bank Busted
This is one of the reasons why the primary neutral is generally left floating on these installations. Failure of one unit or primary fuse will cause the voltage to collapse, and load will drop.
RE: Tranformer Bank Busted
Old taps/ connectors heated-up, transferred heat to the tank, and boom!! Not a good call from the guys at site, I think.