Re: (ET) Sparks!

[tb <tbamc gbta net>]

I do have 2nd speed though, so that means 1A is closing, right?  1A closed 
would also be MORE current at the downstream side, yes?

Would it make a difference to my Fluke (which is my real concern) if I 
measure across these contactors rather than from them to battery 
negative--which was what I was doing?

Thanks.

Thon


On Jul 22, 2013, at 6:24 AM, Harold Zimmerman-Clean Power Supply wrote:

> Sounds like 1A is the one not closing. A reading of approx. 36V on the 
> coil and almost no voltage across the contacts when running is what 
> you're looking for. Sounds like current was flowing through the resistor 
> instead of the contacts of 1A and when you applied your test lead it 
> tried to flow through there and the lead couldn't handle it.
> Harold Zimmerman
> 
> On July 21, 2013 at 1:01pm -0400, you wrote:
> 
>> I was having problems getting my E12M to move forward and traced it to 
>> a bad micro-switch.  Replaced and all seemed ok for a short time.  Now, 
>> no high speed (2A).  2A coil has 38v, but no v on its contacts.  Wanted 
>> to check for voltage on 1A contact which should feed 2A.
>> 
>> With drive motor running in 2nd speed, but lever in high, I touched 
>> meter probe to the 1A contact (wire #7), got sparks and nearly burned 
>> my probe in 1/2.  Am fairly certain the probe wasn't touching anything 
>> else.  Before I ruin a good Fluke meter, or its probe, thought I better 
>> ask what's going on.  :-)
>> 
>> Was current being diverted from R2 through the meter?  Or?  I should 
>> mention I replaced 1A (needlessly) when doing the original 
>> troubleshooting.  It's a slightly different style contactor than the 
>> original but don't think it explains this.
>> 
>> Thanks.
>> 
>> Thon
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