Nick:
Here's my best guess: The X240 is configured to work with power legs with
180 degree phase differential. A 3 phase source has 120 degree phase
differential. This 120 degree phase differential shows as some degree of
direct short to the source.
Solution: I would forego the X240 and change the stacking configuration to
Classic stacking. Eliminate any shared neutrals to avoid neutral over-current.
William Miller
At 08:09 AM 7/29/2008, you wrote:
Hello good folks in the RE world! An off grid customer of mine has a VFX
Quad Stack wired exactrly like page 20 in the FX manual, including the
X-240 balancing transformerconnected to the panel output legs. He has been
feeding it with two legs of a three-phase diesel generator. IS THIS A
COMPLETE NO-NO??? HE KNOWS THAT IT WILL RESULT IN AN UNBALANCED GEN
OUTPUT, BUT SO FAR IT HAS BEEN WORKING OK, BUT WITH THE FOLLOWING GLITCH:
WITH THE GENSET OFF------THE OUTBACK POWER PANELOUTPUT BUSSES ARE BOTH
ENERGISED ONLY WHEN THE x-240 BREAKERS ARE ON. AS SOON AS THE GENERATOR
STARTS (AGS SYSTEM) THIS 20 AMP DOUBLE BREAKERSEE PAGE 20, X-240) TRIPS
IMMEDIATLEY, LEAVING HALF THE LOADS WITHOUT POWER (NO OUTPUT FROM THE LEG
2 INVERTERS TO THE HOT 2 OUT BUSS) i'M BAFFELED, COULD SOMEBODY PLEASE
EXPLAIN THIS SITUATION TO ME SO THAT i CAN HELP THEM OUT? Another
electrician told them that a buck/boost transformer (on the gen
output?)would be the fix. Thanks a bunch in advance for your help in this
serious matter. Nick Houser Off Grid Services, Powell River, BC
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