rturbett Posted April 13 Report Posted April 13 My POH does not go into detail on this- Could someone define the difference between the two alternator circuit breakers for me. I hate to just assume.... Thanks, Rob Quote
N201MKTurbo Posted April 13 Report Posted April 13 The ALT breaker is on the output of the alternator. The ALT FLD breaker is for the voltage regulator. If you pull the ALT FLD breaker, you will turn off the voltage regulator which removes excitation from the alternator so it will not make any power. It is mostly there to protect the regulator. Sometimes if the alternator stops working, power cycling the regulator will reset it and it will start working again. 2 Quote
PT20J Posted April 13 Report Posted April 13 Circuit breakers exist to protect wiring. They have a secondary use for deactivating a circuit manually if they are the push on, pull off type. Some voltage regulators react to an overvoltage failure by intentionally causing a short in the field circuit to trip the field breaker and disable the alternator. The 70 amp breaker protects the wire between the alternator and the main bus. The alternator cannot supply enough current to trip this breaker but the battery could if there were a short circuit in this wire. 2 Quote
N201MKTurbo Posted April 13 Report Posted April 13 I’ve popped the alternator breaker after jump starting a dead battery. I know, you are not supposed to do that. 1 Quote
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