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recapen(at)earthlink.net
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 Posted: Wed Nov 21, 2007 5:03 am Post subject: Running avionics on power supply |
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No replies to my initial post, so trying again....
Should there be any issues in running my electrical system with a power supply instead of the alternater/engine running? I have a battery in the circuit (PC680).
Do I need to connect the power supply directly to the battery or can I hook it to my shunt to simulate the power coming from the alternator?
Just want to make sure that I don't fry anything.....
Ralph Capen
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Gilles.Thesee(at)ac-greno
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| Posted: Wed Nov 21, 2007 5:09 am Post subject: Running avionics on power supply |
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<recapen(at)earthlink.net>
| Quote: | Should there be any issues in running my electrical system with a power supply instead of the alternater/engine running? I have a battery in the circuit (PC680).
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No problem at all. We do that anytime some checks or maintenance are
necessary.
| Quote: |
Do I need to connect the power supply directly to the battery
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Yes
| Quote: | or can I hook it to my shunt to simulate the power coming from the alternator?
Depends on how your circuit is wired.
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Be careful not to toast the supply by turning too much loads at a time.
Best regards,
--
Gilles
http://contrails.free.fr
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recapen(at)earthlink.net
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| Posted: Wed Nov 21, 2007 5:23 am Post subject: Running avionics on power supply |
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Gilles,
Connecting it to the shunt in my case bypasses the master relay and energizes the aircraft's electrical system. It allows me to see the loads of each of the devices as I bring them on-line. My fear is that any electrical anomalies would find a quicker path through my avionics than through the battery which would absorb them better.
I think I have just convinced myself that connecting it to the battery is the safer way to go....someone else can tell me if it is not necessary......
Thanks,
Ralph
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Thu Nov 22, 2007 5:45 am Post subject: Running avionics on power supply |
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Hook up PS from alternator side of shunt to ground 13.8V. Diodes in the
alternator should protect the alternator.
Pay particular attention to polarity as you would if you were boosting a
car.
Check one buss at a time.
Noel
[quote] --
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Noel Loveys
Kitfox III-A
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