C
Cat 22
I have a 5700 watt Mcculloch FG5700AK generator. When its under a
good load its ok,but when the load is light/none the freq jumps way
up. The speed sounds about normal, but the frequency measures 180 HZ
at very light/no loads and under quarter load or so the freq drops
back to close to 60 HZ.Output voltage is ~120vac and it does vary
some depending on load. I discovered this when we had a blackout and
i tried to run my new furnace on the generator, it would show fault
led's if the fridge kicked on (momentary voltage sag). or if nothing
else was running besides the furnace.
I measured the noload freq with a fluke meter t ~180Hz- and at first
i thought i just didnt have a connection to the meter probe, but
under load (the lowest load i tried and still got 60Hz was 700 watts)
it drops back to right about 60Hz
Its a new Coleman CP9C Echelon furnace, my old carrier weathermaker
8000 worked fine on the generator. One big difference is the Coleman
draws very little power.
I had thought abut putting this on the furnace circuit:
"Tripp Lite LC 1800 Line Conditioner / AVR System LC1800"
or maybe this:
"Tripp Lite LCR2400 Line Conditioner - Automatic Voltage Regulation
with Surge Protection"
Would an ordinary Computer 1200VA UPS do?
Any ideas? Why does the freq act like that? Time for new generator?
Thanks
Cat22
good load its ok,but when the load is light/none the freq jumps way
up. The speed sounds about normal, but the frequency measures 180 HZ
at very light/no loads and under quarter load or so the freq drops
back to close to 60 HZ.Output voltage is ~120vac and it does vary
some depending on load. I discovered this when we had a blackout and
i tried to run my new furnace on the generator, it would show fault
led's if the fridge kicked on (momentary voltage sag). or if nothing
else was running besides the furnace.
I measured the noload freq with a fluke meter t ~180Hz- and at first
i thought i just didnt have a connection to the meter probe, but
under load (the lowest load i tried and still got 60Hz was 700 watts)
it drops back to right about 60Hz
Its a new Coleman CP9C Echelon furnace, my old carrier weathermaker
8000 worked fine on the generator. One big difference is the Coleman
draws very little power.
I had thought abut putting this on the furnace circuit:
"Tripp Lite LC 1800 Line Conditioner / AVR System LC1800"
or maybe this:
"Tripp Lite LCR2400 Line Conditioner - Automatic Voltage Regulation
with Surge Protection"
Would an ordinary Computer 1200VA UPS do?
Any ideas? Why does the freq act like that? Time for new generator?
Thanks
Cat22