3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
Just an interesting observation related to the current discussion......
I have an APC 1000 watt UPS. It was given to me when the batteries failed (2 - 12VDC batts).
I installed the UPS in the basement and connected 2 lead-acid batteries externally. I ran a power cord from the UPS output upstairs to the entertainment unit. More for filtering, spike protection and voltage regulation than as a backup power source. Incidentally, the output of this UPS when on battery power is an absolutely beautiful sine wave.
A few weeks ago, a car hit a power pole down the road turning out the lights for several hours. I started my big Champ (C41365 13HP 6,500 watt) and flipped the transfer switch.
Looking around, I noticed the UPS would NOT switch off of battery power. I decided to turn on my bench O'scope and take a look at what was coming out of the generator. The sine wave was rising to about the 2/3 point, falling off a tad, and then resuming its path to peak voltage. We (the forum) looked at a similar wave on another genset a good while back and debated the cause. Mr. Wizard said it looked like a diode going into avalanche. The signal I was looking at from the big Champ was similar to the one from my ELM3000 that caused the clock on the RV microwave to double speed. Incidentally, the ELM3000 uses a capacitor for VR, the big Champ uses an AVR as does the smaller 40008 Champ.
Anyway, the UPS was apparently interpreting the misshaped wave form from the generator as a "problem" - which is what it is suppose to do when sampling grid power.
I decided to check the smaller 400 Watt APC UPS on the shop computer and the Belkin UPS on the upstairs computer, I discovered neither one of them was accepting the generator AC as a valid signal.
I now need to try the UPS on the 40008 to see what happens. The sine wave on that unit does not show the "dip".
BTW, everything else running off the backup generator worked fine. I did not try the microwave.
I have an APC 1000 watt UPS. It was given to me when the batteries failed (2 - 12VDC batts).
I installed the UPS in the basement and connected 2 lead-acid batteries externally. I ran a power cord from the UPS output upstairs to the entertainment unit. More for filtering, spike protection and voltage regulation than as a backup power source. Incidentally, the output of this UPS when on battery power is an absolutely beautiful sine wave.
A few weeks ago, a car hit a power pole down the road turning out the lights for several hours. I started my big Champ (C41365 13HP 6,500 watt) and flipped the transfer switch.
Looking around, I noticed the UPS would NOT switch off of battery power. I decided to turn on my bench O'scope and take a look at what was coming out of the generator. The sine wave was rising to about the 2/3 point, falling off a tad, and then resuming its path to peak voltage. We (the forum) looked at a similar wave on another genset a good while back and debated the cause. Mr. Wizard said it looked like a diode going into avalanche. The signal I was looking at from the big Champ was similar to the one from my ELM3000 that caused the clock on the RV microwave to double speed. Incidentally, the ELM3000 uses a capacitor for VR, the big Champ uses an AVR as does the smaller 40008 Champ.
Anyway, the UPS was apparently interpreting the misshaped wave form from the generator as a "problem" - which is what it is suppose to do when sampling grid power.
I decided to check the smaller 400 Watt APC UPS on the shop computer and the Belkin UPS on the upstairs computer, I discovered neither one of them was accepting the generator AC as a valid signal.
I now need to try the UPS on the 40008 to see what happens. The sine wave on that unit does not show the "dip".
BTW, everything else running off the backup generator worked fine. I did not try the microwave.
