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ogdenk
Joined: 05 Feb 2007
Posts: 41
Location: Syracuse, NY
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 Posted: Thu Aug 30, 2018 10:53 am Post subject: Ground power question |
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I have added the ground power connector with overvoltage protection to my RV-10 build per the instructions at
http://www.aeroelectric.com/articles/grndpwr.pdf
As I look at the circuit, I wonder if the contactor will stay closed after being energized if there is a charged battery. Why won't current flow back through the contactor and keep the coil energized if the ground power is removed, there's no rectifier to prevent that?
I don't have a battery in my plane yet so I haven't tested this out.
Kent
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nuckolls.bob(at)aeroelect
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| Posted: Thu Aug 30, 2018 11:27 am Post subject: Ground power question |
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At 01:51 PM 8/30/2018, you wrote:
| Quote: | I have added the ground power connector with overvoltage protection to my RV-10 build per the instructions at
http://www.aeroelectric.com/articles/grndpwr.pdf
As I look at the circuit, I wonder if the contactor will stay closed after being energized if there is a charged battery. Why won't current flow back through the contactor and keep the coil energized if the ground power is removed, there's no rectifier to prevent that?
I don't have a battery in my plane yet so I haven't tested this out. |
You are correct . . . which is why there is an
GND PWR annunciator light and crew controlled
switch.
Bob . . .
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