(2) the tap capacitance, c2, of a capacitance graded bushing is the capacitance ... bushing, but also a smaller host apparatus (i.e. oil circuit breaker or transformer). ... Bushing tests Power and dissipation factor & capacitance test c1 for main .... 1. CTs and Bushing Insulation. Testing. Dielectric Frequency. Response ... CIGRE TB642: 17% of transformer breakdowns are caused by bushing ... C1 – Main insulation between HV and D. ▫ C2 – Represents the insulation betwee
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