Re: red hot resistor--update

Posted by John T on November 30, 2005 at 13:00:46 from (66.244.90.98):

In Reply to: Re: red hot resistor--update posted by Janicholson on November 30, 2005 at 11:08:15:

Dang Jim, what did you have for breakfast, Wheaties or Smart Pills or what cuz I had to scratch my head when I read your post. True, myself n you n Bob find this interesting and the others probably think were Nerds, but my favorite daughter (now in Architecture College) has always thought I was a Nerd anyway. My first day at Purdue in the sixties, until I was told it wasnt cool, I carried my slide rule on my belt with its belt loop even, so I am a certifiable Nerd.

I take it youre looking at a situation where EVEN WITHOUT the cutout relay ever closing, the genny itslef could pump enought amps through the light switch resistor to make her glow. Okay, we would agree a genny belt driven on a bench (not within a mile of any battery) puts out current, so youre thinkin if theres insufficient net Field winding resistance it may be over currenting the light switch resistor n lighting her up, correct???? My best guess is the light switch resistor ohms is close to what the Field windings are, which is maybe in the 1.5 to 3 ohms range???? Anyone know??????

Hmmmmmmmmm...... Well I cant find any flaw in your thinkin so I gotta agree I reckon.

Okay, I reckon if the Field were dead shorted to ground, however, current would go there INSTEAD OF via the higher resistance path of the switch resistor to ground.

THEREFORE If youre still thinking more of a winding to winding short versus a winding to case short as I considered way back when, I think thats making more n more sense now. I guess the critical thing would be, as I said before, is WHERE THE SHORT IS. If the short were in a location(s) whereby there was like NOOOOO current flow around the poles, the magnetic field would be very weak and the genny wouldnt be capable of pumping all that much through the light switch. However, if the Fields were shorted less severe (depends on location(s)) such that the magnetic strength were decent, there could be enough amps through the switch to over current it maybe?????????????

Regardless where or how bad the short is or where, from what Alan said it does indeed look like some kind of a short is the problem. We may never know exactly the findings, but Ive enjoyed the ride regardless. If we had his genny on our own bench for 2 minuts armed with a Simpsom 260, I'm sure any of us would have the answer right off the bat, its harder over the dern net Eh.

Take care Jim n Bob, enjoyed the discussion

John T

Replies:

• Re: red hot resistor--update Janicholson 13:26:36 11/30/05 (2)
  • Re: red hot resistor--update John T 14:08:03 11/30/05 (1)
    • Re: red hot resistor--update Janicholson 14:31:01 11/30/05 (0)

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