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  3. 6. a 30 mva generator with 15% reactance is connec

6. A 30 MVA generator with 15% reactance is connected to a bus bar. A 25...

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Electrical Engineering

6. A 30 MVA generator with 15% reactance is connected to a busbar. A 25 MVA transformer with 10% reactance is also connectedthrough a 10% bus bar reactor to the same bus bar. Both of thesereactance is based on 25 MVA. If a feeder taken out from the busbars through a circuit breaker develops a three-phase fault, whatshould be the appropriate rating of the circuit breaker?

7. A system operates at 220 kVA and 11 kV. Using thesequantities as base values, find the base impedance for thesystem.

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