tem1234
Electrical
- Jun 13, 2007
- 192
Hi,
I'm wondering this question for a while, why ZZ instead of Ygd for a grounding transformer?
I think that the ZZ doesn't have to be as big as the Ygd for the same fault current, so maybe a cost benefit. Do you know something else, and is it really a cost benefit since Yd are more common? I search in old thread for this, but didn't really find why ZZ are often used.
If you have good reference which explain how to size the grounding transformer, it'll be appreciated.
thanks