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UHVDC 66 kv gis switchgear leakage test manufacturer

UHVAC Substation and Main Electrical Equipment - ScienceDirect· As such, during the short-duration power frequency voltage withstand test on the 500-kV side, the potential of the 110-kV LV side of the transformer is used to support the neutral point to increase the potential of the 500-kV side. When the test voltage on the 500-kV side reaches the insulation level of 630 kV by using the above method, the ...

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