Ole electric
Member
- Location
- MetroWest Boston
Ok, need to start fresh with this question;
I have a small (15kva) transformer supplying 240 to a machine (plastic injection with heat , no neutral required) and wonder if I need to provide a reference to ground from the secondary conductors.
480 x 240 delta/delta (6 leads)
3 phase 480v 20a branch circuit with equipment ground feeding the transformer and through to the machine.
If one leg on the secondary faults to ground OCP will not trip until second leg faults.
thoughts?
thanks all
Ole Electric
I have a small (15kva) transformer supplying 240 to a machine (plastic injection with heat , no neutral required) and wonder if I need to provide a reference to ground from the secondary conductors.
480 x 240 delta/delta (6 leads)
3 phase 480v 20a branch circuit with equipment ground feeding the transformer and through to the machine.
If one leg on the secondary faults to ground OCP will not trip until second leg faults.
thoughts?
thanks all
Ole Electric