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Fergus Kyle
Joined: 03 Jun 2007 Posts: 291 Location: Burlington ON Canada
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Posted: Mon Oct 11, 2010 4:56 pm Post subject: Ground Power test |
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Perhaps I’m being too simple, but I run an LED from the base of the GPU fitting such that if it shows about 12-14Vdc in correct sequence, the LED lights and I know I can power the GPU contactor to the ship. Won’t that do?
Cheers, Ferg [quote][b]
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nuckolls.bob(at)aeroelect Guest
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Posted: Mon Oct 11, 2010 5:17 pm Post subject: Ground Power test |
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At 07:52 PM 10/11/2010, you wrote:
Quote: | Perhaps I’m being too simple, but I run an LED from the base of the GPU fitting such that if it shows about 12-14Vdc in correct sequence, the LED lights and I know I can power the GPU contactor to the ship. Won’t that do? |
Sure . . . as long as you have control of the power
being fed to the rest of the airplane. The system I
proposed a few minutes ago applies power to the ship's
battery as soon as you hook up the external power source . . .
which puts battery-bus powered things at-risk before
the battery master is turned on . . . and everything
else after the master is on. There is a fist
full of ways to connect, pre-test, control and protect
for the various ground power faults.
Reality of the ground power situation is that it's
seldom needed and then mostly under conditions
controlled by the owner/operator.
Bob . . . [quote][b]
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