HI All, If the voltage from the generators is low ( probably) then a old trick is to use a buck/boost transformer to bump it up the voltage. This trick has the advantage that it doesn't have the hz be too high.
yours, jay peltz power On Aug 19, 2010, at 5:19 PM, Mick Abraham wrote: > I knew Allan S. & Brian T. would be among the first to chime in with helpful > observations. My recollection, however, was that prior efforts with portable > generators had worked OK with DR sets...and I know of one setup like that > which is working OK in my home county for sure. (That's a portable with > fairly big wattage rating, however.) > > I increased the engine RPM on that newly repaired generator but I felt > creepy around 125 volts per leg. No more fireworks, please, but should I > tweak it up faster? > > So...Allan is saying that he suspects these DR units are operating "normally" > and therefore could not be helped by a repair. I look forward to receiving > additional posts on this topic. > > **************************************** > > Brian T's point (about the neutral usually being bonded to metal frame on > portable generators) is well taken. I tried to buzz it out with my continuity > meter and read "open" between genset neutral & metal chassis. This was at the > end of some hot & hectic overwork, however, so maybe I screwed up on that > test...loose meter cable or sketchy switch position on the meter, maybe. I > will test that again next time. > > Although it's a portable genset of fairly low price, I think it has some > fancy electronic ground fault interrupter or maybe even electronic ground > switching. Perhaps that's why it wouldn't buzz out when the engine was off. > When the "green wire" on the twist lock power cord was connected to the metal > of the Power Panel System--as seems quite reasonable--the generator's > voltmeter would drop to zero as soon as the twist lock plug was inserted. > That's when they called me...to boldly go where no normal, sane electrician > ever would. I loosened off that green wire from the Power Panel and all > looked well. I should have stopped there. The manual for the generator was no > help at all. > > Three poorly charging inverters in two days...plus one Big Bang...that was > not one of my better weeks! > > Mick Abraham, Proprietor > www.abrahamsolar.com > > Voice: 970-731-4675
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