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An alternator is being paralleled with one on the lineAt the INSTANT the circuit breaker is closed,...

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The breaker should be closed when one synchronizing lamp is dark and the other isbright  The breaker should be closed when both synchronizing lamps are bright  The frequency meter should be used to determine that the incoming alternator frequencyis slightly higher than the bus  A portable phase sequence indicator must be used to verify the information from thelamps  
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The alternators are not generating the same voltages and should be adjusted onautomatic voltage regulator rheostats  Alternator frequencies are different and should be adjusted on the governor speedcontrollers  Alternators are out of phase and should be tripped and paralleled again  One alternator has lost one of its phases  
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