Ground-Fault Protection 230.95

[abcclub]

Does a 480 volt 4,000 amp service that employs a high impedance grounded neutral still required Ground-fault protection?

 

[charlie b]

I think not. Right up front, that article says it applies to solidly grounded wye systems.

 

[resistance]

I think not. Right up front, that article says it applies to solidly grounded wye systems.

I agree!!!!!

 

[abcclub]

Thank you very much

 

[brian john]

With the high impedance you would never achieve the currents high enough to trip the standard GFP relay 100-1200 Amps. In addition the typical use of a high impedance system is to minimize outages from ground faults.