REWINDING THE COILS ON A 3-BRUSH RELAY

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awander
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REWINDING THE COILS ON A 3-BRUSH RELAY

#1

Post by awander » Fri Sep 23, 2011 5:24 pm

Hi guys:

i am working on a project to document and rewind the coils on 3-brush cutout relays.

Does anyone have a burned out relay that they would be willing to donate to this cause?



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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#2

Post by 58flh » Sat Sep 24, 2011 12:33 pm

I have a old delco-remy would that be suffice for your project?----58flh :?:

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#3

Post by awander » Sat Sep 24, 2011 4:14 pm

58flh:

I think so-I am trying to document the windings-since mine was burned, I am not sure I got it correct, and I may have miscounted somewhere in between 1 and 1300. So more samples to take apart would be helpful.

Once I know what to do, i am going to attempt to rewind it on my CNC Mill, converted into a coil winder.

I sent you a PM.

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#4

Post by Cotten » Sat Sep 24, 2011 6:32 pm

Andy!

I have about four in an El Producto "Bouquet" box,
but how do I quickly determine if they are dead soldiers, or might still live?

....Cotten

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#5

Post by awander » Sat Sep 24, 2011 7:54 pm

Cotten:

From the GEN terminal, you should measure somewhere around 50 ohms to the relay frame, and a very low resistance(one the order of 0.2 ohms) to the BAT terminal.

If one or both measure open(infinite ohms) or a much lower resistance, then one or both of the windings are open or shorted.

The series winding, which should measure only about 0.2 ohms or so, is the one that is hard to measure-if it is partially shorted(due to lacquer coating on the wire either melting or chipping off with age), then it will be hard to tell with just an ohmmeter.

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#6

Post by john HD » Sat Sep 24, 2011 8:05 pm

andy,

please document this well with photos.

i am very interested in the results...

john

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#7

Post by awander » Sun Sep 25, 2011 12:48 am

I'll do that, John.

I just need some more "guinea pigs"..

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#8

Post by awander » Sun Sep 25, 2011 5:11 am

I think I have the coil winder on the CNC figured out-I did some test winds using some of the old fine wire from the "shunt" coil on my dead relay.

And I figured out how to take the old relay apart without damaging it....I have some magnet wire coming in soon...so I may have some good news to post in the near future.

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#9

Post by George Greer » Sun Sep 25, 2011 5:15 am

I just need some more "guinea pigs"..
I have some free time today, and will look thru my box of old aquired items to see if I have one to donate.

George

Will report later.

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#10

Post by awander » Sun Sep 25, 2011 5:19 am

Thanks, George!

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#11

Post by George Greer » Sun Sep 25, 2011 8:58 am

Andy,

I found one in a box of stuff..

Photo later on today to make sure that it is what your looking for.

PM your mailing info.

George

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#12

Post by George Greer » Sun Sep 25, 2011 10:09 am

Photos...

Is that it?

If so, it is yours.

George
You do not have the required permissions to view the files attached to this post.

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#13

Post by awander » Sun Sep 25, 2011 1:06 pm

That looks good, George!

PM on the way.

thanks,

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#14

Post by George Greer » Sun Sep 25, 2011 3:36 pm

Andy,

I got it...

It will on its way to ya ASAP.

George

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Re: REWINDING THE COILS ON A 3-BRUSH RELAY

#15

Post by awander » Sun Sep 25, 2011 7:29 pm

Thanks, George!

Make sure to let me know what I owe you for the postage, OK?

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