Steve is right, and thanks to him for highlighting it. You need proper isolation kit to protect linesmen for when they think that they have isolated the supply so they can work on it, only to find your voltage there to kill them. It was the principle of sychronisation that I was trying to illuminate. Ken ----- Original Message ----- From: "Steve Spence" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Saturday, March 29, 2003 3:12 PM Subject: Re: [biofuel] Re: Electric generators
> you need a approved grid tie inverter for that. > > Steve Spence > Subscribe to the Renewable Energy Newsletter > & Discussion Boards. Read about Sustainable Technology: > http://www.green-trust.org > [EMAIL PROTECTED] > ----- Original Message ----- > From: "eric12856" <[EMAIL PROTECTED]> > To: <biofuel@yahoogroups.com> > Sent: Saturday, March 29, 2003 1:09 AM > Subject: [biofuel] Re: Electric generators > > > > Wow, thanks Ken and Martin, great info and thank you for responding! > > I thought there was no way a generator/alternator genhead could > > backfeed the grid. Everything I see on the web says I need an > > induction motor to do that. > > > > Anyway, what I really want to know is how to prevent "islanding" when > > the utility goes offline. Any suggestions/references? > > > > > > --- In biofuel@yahoogroups.com, "Ken Basterfield" <[EMAIL PROTECTED]> wrote: > > > Martin the is nothing technical to stop you using your alternator > > as it is > > > to feed back into the main supply. All you need to do is > > synchronise the > > > alternator output with the mains and then close the switch to > > couple the > > > two. You will have to common the neutrals. A lamp connected > > between mains > > > phase and alternator phase is all that is required. As the engine > > speed is > > > slowly increased, the the lamp will begin to beat slowly on and > > off as the > > > alternator phase signal slowly slips past the mains phase. When the > > lamp > > > goes out the two signals are in phase and can be connected > > together. I.e. > > > you close the switch. henceforth the alternator will be sychronised > > to the > > > mains and if you increase the Diesel engine throttle, power will be > > fed to > > > the mains supply. The lamp will have to be double voltage to avoid > > blowing > > > it. A 240 volt lamp when connecting 110 systems or two 240 lamps in > > series > > > if running off 240 volt systems. > > > > > > Don't throw out the alternator just to fit an induction motor > > unless your > > > alternator has specific instructions from the manufactor saying > > that you are > > > not allowed to connect it to the mains. > > > > > > This same system of synchronising using beating lamps can be > > applied to 3 > > > phase alternators, just connect 3 lamps between each of the > > respective 3 > > > phases----- Original Message ----- > > > Ken > > > > > > From: "martin" <[EMAIL PROTECTED]> > > > To: <biofuel@yahoogroups.com> > > > Sent: Friday, March 28, 2003 4:10 AM > > > Subject: Re: [biofuel] Re: Electric generators > > > > > > > > > > Your induction generator will continue to function if it isn't > > > > overloaded. If the power goes out, the induction generator will > > either > > > > become overloaded and stop generating, or continue to run while > > > > back-feeding the power lines. As soon as you notice that the > > power is > > > > out you should throw your main breaker or shut off the generator. > > If you > > > > intend to spin your meter backwards anyway, I'm really not sure > > if one > > > > of the automatic switches would work for you. > > > > > > > > eric12856 wrote: > > > > > > > > >Lot of smart guys in this group so I figure someone can answer my > > > > >question that I think may have a simple answer, but first > > > > >some background. > > > > > > > > > >I have a 5hp Biodiesel generator set that I also extract heat > > (from > > > > >coolant and exhaust to heat the house). Now that I've moved into > > a > > > > >new house (my heating and electric was $450/month!!)I was > > thinking of > > > > >swapping out the generator head for an induction motor so that I > > can > > > > >intertie with the utility and use the utility as a battery and > > > > >supplemental power. > > > > > > > > > >I know that if the utility goes out that It will produce no > > > > >electricity since the motor needs the field windings excited to > > > > >produce. Thats ok, the generator head will be moved to small gas > > > > >engine as backup. > > > > > > > > > >My question: > > > > >For safety reasons, I would like to stop the Diesel engine when > > the > > > > >utility goes off. Anyone know how I can accomplish the shutdown > > or > > > > >where I can find a schematic so I can build my own? The engine > > has a > > > > >built-in 12 volt shutdown solenoid. Would a simple relay off the > > main > > > > >breaker suffice? > > > > > > > > > >Thanks! > > > > >Eric Olsen > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > --- > > > > Martin Klingensmith > > > > http://nnytech.net/ > > > > http://infoarchive.net/ > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > http://journeytoforever.org/biofuel.html > > > > > > > > Biofuels list archives: > > > > http://archive.nnytech.net/ > > > > > > > > Please do NOT send Unsubscribe messages to the list address. > > > > To unsubscribe, send an email to: > > > > [EMAIL PROTECTED] > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Biofuels list archives: > > http://archive.nnytech.net/ > > > > Please do NOT send Unsubscribe messages to the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > > > > > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Rent DVDs Online-No late fees! 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