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Earthing Transformer

Earthing Transformer

Earthing Transformer

(OP)
What is earthing transformer? what are selection criterias of earthing transformer?

Regards,
Edgar1

RE: Earthing Transformer

Earthing txs are used where there is no common or star point, eg on the delta connection of a power tx. It is a 1 to 1 auto tx wound in inter star format. The star point is then earthed.
They are often found in substations.

Regards,

Lyledunn

RE: Earthing Transformer

Suggestion: The earthing transformer can be delta star with the star grounded. This is governed by the requirement on the system grounding. The zig-zag star winding grounding (earthing) transformer is normally used for the ground fault lasting up to 10 seconds only. Visit
http://www.surpluselectrical.com.au/tpare.htm
http://www.kist.ac.rw/adbreport3/Appendix10.18.htm
http://domino.iec.ch/iev/iev.nsf/fb10ff5e3d2aaec7c1256a40002d9963/1b5e15d8c4af76eac12569c10046b086?OpenDocument
for more info

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