Hello folks, I have a question on systems we work on which consist of
480Y/277 service from either transformer banks or generator. These systems never have a 4th conductor installed (other than ground wire) between service and distribution panel. The loads consist all of 3 phase 480v motors, except for a 15kva 480/240 transformer tied in for control power. This transformer is what makes me think the service should have some sort of neutral conductor.
Lets assume the service is a 100kva transformer bank and the control transformer is the 15kva previously mentioned. Can yall please help me figure what the neutral current would calculate to under full load.
Thanks
480Y/277 service from either transformer banks or generator. These systems never have a 4th conductor installed (other than ground wire) between service and distribution panel. The loads consist all of 3 phase 480v motors, except for a 15kva 480/240 transformer tied in for control power. This transformer is what makes me think the service should have some sort of neutral conductor.
Lets assume the service is a 100kva transformer bank and the control transformer is the 15kva previously mentioned. Can yall please help me figure what the neutral current would calculate to under full load.
Thanks