When the supply voltage is 500 volts

When the supply voltage is 500 volts




The insulations resistance R1 and R2 of a live 2-wire network are measured by earthing each main in turn through a milli-ammeter in series with a high a resistance r. Evaluate R1 and R2 for r = 20,000 ohms, i1 = 1 mA and i2 = 0.5mA when the supply voltage is 500 volts.





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