Re: Re: [Chrysler300] Subject: Electric Window Motors

[<fabe7445@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

   Bill,

   Lighting loads have a high inrush of current as well. Tungsten has a variable resistance, as it
   heats up it's resistance changes. That's why industry has "lighting contactors" (large relays).
   Tungsten heats very rapidly so the high current is in effect abount one second but it will shorten
   the life of a standard contactor (relay) if you cycle it frequently.

   Jim Faber soon to be cooler South Carolina
> 
> From: whuff <whuff@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> Date: 2006/11/30 Thu PM 10:56:50 EST
> To: Paul Holmgren <paulholm@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, Marshall Larson <yelof@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> CC: chrysler300@xxxxxxxxxxxxxxx, hurst300@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, Chrysler300E@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] Subject: Electric Window Motors
> 
> The possible sources of the relays are good to know.
> 
> One of the reasons I went with the larger heavier relays rather than 
> a newer and more compact design was that I had some doubts about the 
> design of the smaller relays.  I believe they are primarily made for 
> resistive lighting loads where a straight across the board amperage 
> rating will work.
> 
> The motors should appear to be  almost a dead short on starting until 
> they rotate and a reverse EMF is built up.  On opening, the relay 
> contacts may also have to withstand an inductive kick that could drag 
> a spark across small contacts that didn't open quickly or far 
> enough.  Over time, my thinking went, and still does, these 
> conditions may pit or damage the contacts, leading to a short 
> life.  If anyone has experience with the Bosch type relays used as 
> motor controllers, I would like to hear from them.
> 
> Gee, if I could only find my old MG, I could get some relays from 
> Lucas, Prince of Darkness.  :-D
> 
> 
> Bill Huff
> At 11/30/200608:40 PM, Paul Holmgren wrote:
> 
> >Possible secondary source for relays:
> >
> >Autozone-  The Pilot relay model number on the packaging card is PL-RY1
> >
> >rated 30A,  TESTED load for window motors is in the 13A to 15A range,
> >shop manual says 15A
> >
> >suitability of these UNknown to me yet!!! But could very well be workable
> >
> >
> >--
> >Paul Holmgren
> >2 57 300-C's in Indy
> >Hoosier Corps L#6
> >
> >
> >To send a message to this group, send an email to:
> >Chrysler300@xxxxxxxxxxxxxxx
> >
> >For list server instructions, go to 
> >http://www.chrysler300club.com/yahoolist/inst.htm
> >
> >For archives go to http://www.forwardlook.net/300-archive/
> >Yahoo! Groups Links
> >
> >
> >
> 
> 
> 
>