Aim/Purpose of the IR Test: To ensure that, each winding of the Current Transformer, has sufficient Insulation Resistance with respect to Earth (CT Body) and between the two Secondary Cores. Principle: Insulation Resistance is the Ratio of the Applied Voltage (DC) to the total Leakage Current. Leakage current should be as small as possible ,…
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Detecting the incipient weaknesses in HV insulation. Predicting the remaining life expectancy of the equipment under test. To get the “Benchmark Reference Reading” of equipment when the equipment is new, clean, dry and free from impurities. Isolation: The Test Equipment (CT/Bushing) needs to be made potential free, by removing the jumpers.Tan Delta Point is to…
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