just a follow up ... contacted the manufacturer and job has been put on hold pending further investigation . Thank you to all who responded I'l post a follow up with the outcome when it gets sorted
cheers
so many replies but the question remains so pls reply if you have some experience in transformer test. My background is mv switchgear, so abit stuck here. Transformer was built in a developing nation so i guess it's a case of, you get what you pay for. However it can not be sent back or...
thank you for the replys so far. just to add; the shot blast was found by accident. The transformer was shipped full of oil less radiators. But all the butterfly valves were on back to front. so after draining and removing the valves the metal was found in the top headers . removed aprox 5kg's...
Installing a new 5MVA ONAN 22-11kv transformer known to have 1-2kg of shot blast sitting in the bottom of the tank. IR between lv-hv was still good so manufacturer says ok to energize. Can anyone foresee any problems if energized.
