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Tractor Talk Discussion Board

Re: 20 vs 30 amp voltage regulator


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Posted by John T on December 28, 2006 at 18:35:02 from (66.244.90.5):

In Reply to: 20 vs 30 amp voltage regulator posted by Bill in NC Wisconsin on December 28, 2006 at 15:57:41:

Bill, I dont think we have enough information to provide a safe n definitive answer. Based on what little info is available, Id hesitate to advise you to use that 30 amp VR just yet, heres why. If were ONLY talking about the Cutout Relay portion of the VR, its no problem that it could switch more amps then the old VR HOWEVER if that VR is designed for a higher amp rated genny then you have, its field current control relay portion may try n pump more field current amps through your genny then its rated for (to try n make it put out more) and the field windings could be overheated !!!

I doubt anyone where you bought the VR has any idea whatsoever of what Field amps/duty cycle that VR is rated for, let alone the max field current rating of your existing genny !!!!!!!!!

Buttttttttt it could work fine n last a long time, theres just no sure way to tell sititn here with no specs or data whatsoever. I can say Ive used 6 volt gennys n made em work n charge at 12 volts SIMPLY by changing to a 12 volt VR and they never seemed to get hot. Thats NOT the engineering correct or any good way to do it, Im ONLY saying it worked and it may well have been pumping more field current then the genny was rated for, it charged but at no super high rate lol A genny dont really know what its output should be exactly, its increased by turning it faster and/or pumping more amps through its field windings.

Better be safe then sorry although if in a bind and the tractor was needed desperately for a short while I doubt that 30 amp VR would fry the genny in any short period of time or even ever BUT I JIUST CANT SAY FOR SUREEEEEEEEEEEEE

John T


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