Question

If a generator looses its residual magnetism, how it is started?

Answer 1

Answer:

Loss of residual magnetism occurs, when self exited generator, is not used for long time, due to adgeing or wrong connection(polarity (+/-)) of field winding. In self excited generator, terminal voltage would not be built up immediately/instant like saperetely exited generator, but biult up gradualy as, voltage built up with increasing field current, hence, terminal voltage may took long, or may not built up if started with heavy load. Loss of residual magnetism, could be built up, by connecting field saperattly for some time.

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