mhammond
Member
- Location
- South Carolina
- Occupation
- Electrician
Will an unbonded generator cause a leg on three phase system to show no voltage to ground and 480 volts to neutral
Generator bonding
- Thread starter mhammond
- Start date
- Location
- Bremerton, Washington
This is a 277/480 generator?
Unbounded as no bond from Y to frame?
Unbounded as no bond from Y to frame?
mhammond
Member
- Location
- South Carolina
- Occupation
- Electrician
mhammond
Member
- Location
- South Carolina
- Occupation
- Electrician
277/480 generator, frame bonded but not neutral bar to ground bar
- Occupation
- Licensed Electrician
If the neutral is not bonded you can get all kinds of weird voltages to ground with a digital meter.
mhammond
Member
- Location
- South Carolina
- Occupation
- Electrician
Thanks, I spent almost 2 hours looking for the problem then found unbonded issue, corrected and now it works fine, wanted to make sure i had actually found the problem
- Location
- Bremerton, Washington
I have seen similar on an ungrounded control power transformer. Your situation would have no fault current return path to generator windings for a line to ground fault