[ausev] Troubleshooting electrical drain issues

Mike Delany mike at p1800s.com
Mon Jun 25 15:16:44 GMT 2007


Rob,
Sounds like you are actually just overloading your Astrodyne unit.  The 
biggest Astrodyne that I saw listed was 200w, so sounds like you need 
more.  Take look at 
http://www.trcelectronics.com/Meanwell/sd-350d-12.shtml for a meanwell 350 
watt unit.  They will sell individual units for $147 plus shipping, so it 
might be your best bet.

Mike

Certified heathen and reformed pacifist

http://www.p1800s.com

On Sun, 24 Jun 2007, Rob Hirschfeld wrote:

> All,
>
> I could use some advice on tracking down a power drain.  My various controls (fans, vacuum pump, relays, etc) are drawing so much power from the Astrodyne DC-DC converter that it goes into "power overload shutdown." The lack of DC-DC over draws my poor auxiliary battery which turns off the contactors when I brake!
>
> If I take the pump and fans out of the circuit, the converts runs fine.  If I put them back in then it immediately shuts off.
>
> The relays, contactors, fans, and pump are basically wired in parallel.
>
> Does anyone have a suggestion on how I could track down my power loads per circuit.  I have an ammeter, but it only goes up to 200 millis.
>
> Note: I was able to demonstrate that the DC-DC converter is working fine.  It recovers from overload after a power cycle.
>
> Rob
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