A buddy of mine owns a building in which he runs a plastic molding injection business out of. He has quite a bit of 3 phase machinery and single phase heating elements that he runs constantly, as well as high bay lighting and some office lighting and what not.
The utility transformer is on site and it feeds a 3 phase, 277/480 volt, 600 amp main switch board in his electric room. He has a 145 kva transformer that is fed from his 480 panel that feeds his 120/208 volt panels. Recently the utility transformer blew a fuse, it was replaced. Then the utility transformer stopped working all together and was replaced. The utility company informed him that he will have to pay for their new transformer due to their belief that his 145 kva transformer was the cause of their equipment failure. They gave no explanation as to how or why they believe this to be the cause.
Does this sound right? He never had any problems with the breaker tripping on the primary side of the transformer. How would the utility come to this conclusion?
Any input is appreciated and I apologize if I posted in the wrong forum. Thanks.
The utility transformer is on site and it feeds a 3 phase, 277/480 volt, 600 amp main switch board in his electric room. He has a 145 kva transformer that is fed from his 480 panel that feeds his 120/208 volt panels. Recently the utility transformer blew a fuse, it was replaced. Then the utility transformer stopped working all together and was replaced. The utility company informed him that he will have to pay for their new transformer due to their belief that his 145 kva transformer was the cause of their equipment failure. They gave no explanation as to how or why they believe this to be the cause.
Does this sound right? He never had any problems with the breaker tripping on the primary side of the transformer. How would the utility come to this conclusion?
Any input is appreciated and I apologize if I posted in the wrong forum. Thanks.