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Re: (ET) Small E20 fire: What is it with MOVs?
I've never had that issue. BTW what flavor is your E-20 ? I've
gots to know. <G>
A SWAG would be looking for something that gone to chassis. Or possibly
TWO somethings that have gone to chassis. That would create
Chris Zach wrote:
So I was using the E20 pretty heavily today in the yard, mostly to tow
the trailer full of dirt. Once done I drove it up to the top of the
driveway to get the paper, then let it coast in L down to check the
Brakes stink like normal but can still stop the tractor (new brake kit
going on after spring work). Fired it up again, let it build up speed,
then engaged the motor to slow it down.
*Foom* Big cloud of white smoke from under hood. That's always bad.
Motor still had power, but I stopped the tractor and hit the main
disconnect. Smoke continued to pour out for a moment, then it
Hm. Opened the main panel, and looked at card 4. Everything was intact
(I have bigger diodes on that) however on the resistor card there was
a smoking disc where the MOV once was. Looks like it blew up.
So what is it with E20's and MOVs? I know they're there to catch the
back emf from the motor or the spikes or whatever but they just seem
to explode every year. Can one get bigger/higher capacity MOVs? Can
one parallel them? Do something else?
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