Re: (ET) relays

["RJ Kanary" <rjkanary nauticom net>]

             The lone E-12 S that I serviced oddly enough presented with 
the
field relay in the throes of meltdown. I  installed Metal Oxide Varistors
across the field winding.
           That kept every body happy for several years.The downside of 
that
approach is, the varistor can only eat so many lightning bolts, until it
dies.There is no practical way to determine the minutes left to play on
those. They croak, and shortly thereafter, so does the relay.
           Armed with this insight, I can see why GE abandoned field
switched direction control. Given the consumer grade components used, it 
was
a no brainer to buy more contactors from Prestolite®, and let the big parts
take the abuse.
       Bear in mind, I am not an EE, nor do I play one on television.

----- Original Message ----- 
From: "wombat" <wombat dssinternet net>
To: <elec-trak cosmos phy tufts edu>
Sent: Thursday, February 12, 2004 4:08 PM
Subject: (ET) relays


> have you tried low value resistor (,2 ohm or so or like the old ballast
> res they used on cars to drop ign coil voltage - big white ceramic things
?
>
> sometimes that smooths out the spike enough.
>
> wombat
>
>
>
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