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Ground power question

 
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ogdenk



Joined: 05 Feb 2007
Posts: 38
Location: Syracuse, NY

PostPosted: Thu Aug 30, 2018 10:53 am    Post subject: Ground power question Reply with 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.
Kent


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nuckolls.bob(at)aeroelect
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PostPosted: Thu Aug 30, 2018 11:27 am    Post subject: Ground power question Reply with quote

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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