When two generators are running in parallel and
one generator can carry the load, reverse power trip can be tested by load
shifting using governor control. When the load has shifted sufficiently and the
off loaded generator is carrying a small percentage of load, its breaker trips
and fuel supply to its prime mover cuts off. This means reverse power relay has
operated. The relay can be tested by simulation (using the test push button on
the relay) to see if it initiates a trip signal
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