nuckollsr(at)cox.net Guest
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Posted: Wed Feb 15, 2006 6:31 pm Post subject: Piper Style Ground Power |
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>
>
>Reviewing the diagram of the "piper" style ground power plug in Z-31B it
>appears that once external power is applied, the contactor would stay
>energized forever (at least until the battery was killed) since the
>engergizing current would flow backward through the contactor and through
>the solenoid coil. Is there a key point I'm missing or is an interrupt
>switch of some kind called for?
Yup, it's called the ground power control switch illustrated
in this case as a switch-breaker in the lower left quadrant
of the drawing. If you want to use a miniature push-pull breaker,
then an additional switch is called for . . . or you could use
the breaker itself as the controlling device. It's a VERY low
usage item and I'd have no heartburn about using the breaker
as a switch in this case.
Bob . . .
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
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