Autoformer test a "back yard" report
Hi all, The equipment: Sola Basic 4000 autoformer PF 0.98 Magnum hybrid 3012 inverter PF corrected 1200 watt water heater 325 watt absorption fridge 13500 BTU Dometic ducted roof air...
Forum Discussion
Hi MrWizard,
The watt meter is "post" Magnum, so it should be measuring the entire load including the energy from the load support.
I don't think the Magnum is doing voltage support since I have readings from before the autoformer (as low as 95) and after autoformer (from 114 to 121) but before the Magnum.
Since I do have access to the shore power breaker, I deliberately turned on the fridge. That took the total power inside the RV up to 1725 watts. Sure as shooting, in about ten minutes the breaker did it's job.
2.5 hours into the test, the circuit over loaded again with only the roof air running, so I'm calling it a day. Again I'll mention this is a splendidly weak shore power connection, so it made for an ideal test bed for the autoformer.
When on reliable but low voltage 30 amp (108 volts), I've been outside the RV and have heard the autoformer "cut in" before the compressor motor is up to full speed.
The watt meter is "post" Magnum, so it should be measuring the entire load including the energy from the load support.
I don't think the Magnum is doing voltage support since I have readings from before the autoformer (as low as 95) and after autoformer (from 114 to 121) but before the Magnum.
Since I do have access to the shore power breaker, I deliberately turned on the fridge. That took the total power inside the RV up to 1725 watts. Sure as shooting, in about ten minutes the breaker did it's job.
2.5 hours into the test, the circuit over loaded again with only the roof air running, so I'm calling it a day. Again I'll mention this is a splendidly weak shore power connection, so it made for an ideal test bed for the autoformer.
When on reliable but low voltage 30 amp (108 volts), I've been outside the RV and have heard the autoformer "cut in" before the compressor motor is up to full speed.
MrWizard wrote:
Don
What was power factor, ?
Divide the 951 by the pf to get the true VA that was being used at the autoformer, plus you are forgetting to add the load support power
The A/C was using 951 + (33*12.6) = 1366.8/PF = VA used
With my a/C it is typically around 0.87, even less in really hot weather
That makes the above calculation cone out to 1571 VA
My guess the voltage did not recover fast enough
And you again tricked the magnum into voltage support
Something I believe you are trying to avoid
