Delta to Wye motor connections
Delta to Wye motor connections
(OP)
I could use a bit of advise. I'm not use to delta to wye wiring required on the type of starters that we are going to be using. First they are large 350hp at 414 amp. i understand that i take dual feeders to the starter and dual feeders from the starter to the motor. How do I size the feeders correctly folks? (FLA x 1.25 x .58) (.58 derating factor for the Delta to wye.?)is a formula I was told to use. Do I use it on both the primary side of the starter and secondary?
Any help woould be apreciated.
Any help woould be apreciated.






RE: Delta to Wye motor connections
RE: Delta to Wye motor connections
RE: Delta to Wye motor connections
Thanks again
RE: Delta to Wye motor connections
When using a wye-delta starter all six winding ends are brought from the motor to the starter, so there are six connections rather than three, and it may also take more than one conductor per connection. In the wye-delta starter the starter starts the motor with one phase connected to one end of each winding and shorts the other end of all three windings together, making a wye connection. Then in run mode, it connects the windings in a delta. What happens in between the modes depends on whether it is a closed transition starter or an open transition starter.