powerjunx
Electrical
- Sep 13, 2002
- 448
I would like to know the minimum transformer rating which requires a "back up ground fault relay, (51N)"?
I've seen different installation, but more obvious i'd
notice 2MVA haven't such relay as compared to 5MVA transformer and above.
I hope, you guys out there would further elaborate this matter. Please include Standard/Code about these requirement, if any.
Thanks,
Bil