Today's Message Index:
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1. 03:56 AM - Ground power (GLEN MATEJCEK)
2. 06:35 AM - Re: Ground power (Robert L. Nuckolls, III)
3. 11:12 AM - Re: Ground Power Z-31 (user9253)
Message 1
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On Thu, Aug 11, 2022 at 6:38 AM AeroElectric-List Digest Server <
aeroelectric-list@matronics.com> wrote:
> *
>
> I don't know if a reverse voltage or reverse current sensor is available
> at a reasonable
> price.
> If so, the sensor could monitor the current or voltage drop on the cable
> that goes
> between the ground power contactor and aircraft battery
> contactor and could open the ground-power contactor coil circuit when
> current
> is reversed.
>
Consider this:
[image: latest Ground power OV.bmp]
Message 2
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| Subject: | Re: Ground power |
>Consider this:
>latest Ground power OV.bmp
That's what most of the folks decided on . . . but the
ground side of the annunciator needs to go
on the other side of the control-breaker so that
the light goes out when the breaker is open. The
series diode on the coil circuit is not necessary . . .
the spike catcher across the coil prevents energizing
the ground power contactor with reversed polarity
power.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
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| Subject: | Re: Ground Power Z-31 |
PIPER TYPE GROUND POWER SOCKET Aircraft Spruce Part# 11-00500 MFR
Model# 11041 is described as Diecast housing, spring-loaded door.
Assuming that the door is aluminum (non magnetic), a bar magnet could be
epoxied to it. Then a magnetic reed switch could be mounted out of sight,
but within the magnetic field. The switch should close when the door is
open, thus enabling the aux contactor coil circuit.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507656#507656
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