when the generator detects a mains failure it will send a signal to the ats to disconnect from the mains and start automatically once the generator has started it will send a signal to the generator to start when it receives this the ats will switch to the generator supply.
what is a 3 phase generator used for
ac three phase generators are ideal for industrial use as high constant power is necessary to run industrial units these generators are highly useful where power requirement is constant and high for instance data centres and electric motors require constant power.

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