Nominal values of shunt dynamo; 250 kW is given as 550 V. Excitation current for nominal operating status is 4.3 A, iron loss 4.85 kW and friction loss 3.45 kW. According to this; What is the efficiency of the dynamo with armature winding resistance of 0.05 Ω when working at nominal voltage and 50% of nominal power?

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Nominal values of shunt dynamo; 250 kW is given as 550 V. Excitation current for nominal operating status is 4.3 A, iron loss 4.85 kW and friction loss 3.45 kW. According to this; What is the efficiency of the dynamo with armature winding resistance of 0.05 Ω when working at nominal voltage and 50% of nominal power?

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