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The paper summarizes produce over voltage principle of 110 KV main transformer central point and problem in protect mode, suggest has grounding protection of low reactance and this method could protect main transformer in 110 KV transformer substation effectively.
The grounding transformer is a transformer intended solely for establishing a neutral connection point on a three-phase ungrounded power system. The transformer is usually of the wye-delta or zig-zag transformer. This paper first reviews the state of the art of the grounding transformer to assist electric power engineers in the proper understanding of the use and applications of these devices, and...
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