Engineering · Electrical — Generators
On a synchroscope used to parallel generators, the pointer should rotate:
- ARapidly in the 'fast' direction before closing
- BSlowly in the 'fast' direction, closing the breaker just before the 12 o'clock position✓ Correct
- CBackwards at any speed
- DStanding still at 6 o'clock
Explanation
The incoming machine is set slightly fast so the synchroscope creeps slowly toward 12 o'clock (in phase); the breaker is closed just before it reaches top so the machine picks up a little load.
Authority: Marine Electrical (USCG engineering topic)
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