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Calculate the percentage efficiency at rated load

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The following data applies to a 100kW, 250V, 6 pole, 900 RPM,long-shunt, compound DC generator: No-load rotational loss = 3,480Watts
Armature resistance = 0.012 ohms
Series field resistance = 0.008 ohms
Shunt field current = 2.6 A
Assume a stray-loss equal to 1% of the output. Calculate the %efficiency at rated load.
The answer becomes 92.2% but please show the steps arriving to the answer.
SKU: calculate-the-percentage-efficiency-at-rated-load Category:
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The following data applies to a 100kW, 250V, 6 pole, 900 RPM,long-shunt, compound DC generator: No-load rotational loss = 3,480Watts
Armature resistance = 0.012 ohms
Series field resistance = 0.008 ohms
Shunt field current = 2.6 A
Assume a stray-loss equal to 1% of the ouput. Calculate the %efficiency at rated load.
The answer becomes 92.2% but please show the steps arriving tothe answer.

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