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Books mention the Open Circuit and Short Circuit tests on a synchronous generator in order to determine its synchronous impedance. One observes that the Short Circuit Characteristic (plot of short circuit armature current versus field current) is a straight line all the way, whereas the Open Circuit Characteristic (plot of open circuit terminal voltage versus field current) droops due to magnetic saturation.

My question is: why does the Short Circuit Characteristic (SCC) not exhibit saturation?

I would be grateful if someone could offer a detailed explanation. I suspect this is due to armature reaction, but I am not very clear about this.

Thanks in advance.

Cheers

Vivek.

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# Why does the Short Circuit Characteristic of a Synchronous Generator not saturate?

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