[RE-wrenches] Outback VFX input voltage cycling
R Young
solareagle at solareagle.com
Mon Dec 29 23:29:41 PST 2008
Hi Chris,
My answers appear below:
On 29-Dec-08, at 10:41 AM, Christopher Freitas wrote:
> When you tested just the inverter without the generator running –
> you stated that there was a noticeable flicker every 20 seconds –
THE GENERATOR WAS RUNNING, IT'S JUST THAT I TURNED OFF ALL THE LOADS
TO SEE IF THE PROBLEM WOULD PERSIST AND I FOUND THAT THE RAPID
CYCLING OF THE VOLTAGE AT INPUTS QUIT AND THE VOLTAGE STABILIZED AT
~121V BUT ABOUT EVERY 20 SECONDS, JUST WHEN YOU WOULD EXPECT THE AC-
IN TO GET PICKED UP BY THE INVERTER THERE WOULD BE AN AUDIBLE CLICK,
THE VOLTAGE WOULD SUDDENLY DROP TO ABOUT 110V, THEN IMMEDIATELY
RECOVER TO ~121V. AT NO TIME DID THE AC-IN GET PICKED UP.
>
> When the generator was connected to the inverter – was the varying
> AC input voltage viewed on a digital test meter or on the MATE’s
> display?
I WAS MEASURING THE AC INPUT VOLTAGE WITH A FLUKE METER AT THE INPUT
CONNECTORS ON THE FX.
>
> Is this a 120/240VAC “split phase” generator operating with only
> one inverter on it? It is possible that an internal connection in
> the generators windings has fried due to overloading one output leg
> of the generator – its similar to a bad solder joint where the
> voltage is OK until current is pulled and then it opens up. You
> might try putting the inverter on the other leg to see if you see
> the same issue.
THIS IS A POSSIBILITY THAT I WILL LOOK INTO. IT IS RUNNING ON ONE LEG
OF A 240V GENSET, NOT THE IDEAL SITUATION. I'LL BE PUTTING A PSX240
ON IT TO BALANCE THE OUTPUT BUT WILL FIRST CHECK TO SEE IF IT WILL
RUN OK ON THE OTHER LEG BY ITSELF.
>
> Be sure to check the frequency of the generator when seeing issues
> like this – its often the problem.
>
THAT'S ON THE SHORT LIST, THANKS
Thanks all who have offered suggestions, I'll check back in with
whatever I find out.
Ron Young
earthright - Solareagle
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