A 100 kVA, 400 V/250 kV testing transformer has 8% leakage reactance and 2% resistance on 100 kVA base. A cable has to be tested at 500 kV using the above transformer as a resonant transformer at 50 Hz. If the charging current of the cable at 500 kV is 0.4 A, find the series inductance required. Assume 2% resistance for the inductor to be used and the connecting leads. Neglect dielectric loss of the cable. What will be the input voltage to the transformer?

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A 100 kVA, 400 V/250 kV testing transformer has 8% leakage reactance and 2%
resistance on 100 kVA base. A cable has to be tested at 500 kV using the above
transformer as a resonant transformer at 50 Hz. If the charging current of the cable
at 500 kV is 0.4 A, find the series inductance required. Assume 2%
resistance for the inductor to be used and the connecting leads. Neglect dielectric
loss of the cable. What will be the input voltage to the transformer?
Transcribed Image Text:A 100 kVA, 400 V/250 kV testing transformer has 8% leakage reactance and 2% resistance on 100 kVA base. A cable has to be tested at 500 kV using the above transformer as a resonant transformer at 50 Hz. If the charging current of the cable at 500 kV is 0.4 A, find the series inductance required. Assume 2% resistance for the inductor to be used and the connecting leads. Neglect dielectric loss of the cable. What will be the input voltage to the transformer?
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