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hgis hitachi and abb leakage test

Three Phase Padmounted and Unit Substation Transformers 45 ...· PDF fileThis test checks the dielectric integrity of insulation structures between the high voltage and low voltage, and between the high voltage and ground. A pass/ fail decision is made by monitoring the test current intensity. If the resulting current is larger than specified normal leakage and capacitive currents, the unit is …

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