Re: Alt Field Circuit Breaker Popping
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The easiest test for a functioning alternator is to read the voltage on the 12V bus. The battery without alternator will be 12.6 volts or less. A functioning alternator will show more than 12.6 volts. Normally the voltage regulator will adjust the field current to produce 13.8v with an automotive regulator and possibly as high as 14.4v with an aircraft regulator.
The engine must be running for the alternator to produce power, and may not produce full power at less than about 1600 RPMs.
From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Monday, July 29, 2019 12:44 PM
Subject: Re: [Q-LIST] Re: Alt Field Circuit Breaker Popping
50 amp breaker is handling the current out from the alternator. It is only active when the alternator is spinning otherwise current from the alternator is zero. Battery charge plus electric items is probably 35 amps right after takeoff. If engine is not turning or field voltage is zero, then all current is coming from the battery.
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Update: I’ve located a 50amp breaker labeled MAIN. I turned on Master, electronics come on, and then I pulled the 50amp breaker. Nothing turned off. I’ve removed the breaker and would like to know how to test to confirm if it’s working or not.
Should all electronics turn off if I pulled the MAIN breaker?