You could look at zero crossing detecting solid state relays or
alternatively add a series current limiting resistor which is shorted out by
a second relay after a fixed time interval. Maybe try a beefier relay and
see how much longer that will last.
http://www.power-io.com/products/dda5075100.htm
http://www.seagatecontrols.com/catalog.asp?prodid=595593&showprevnext=1
Mark
----- Original Message -----
From: "Roger Parsons" <ve3zi@yahoo.com>
To: <towertalk@contesting.com>
Sent: Wednesday, 21 April, 2010 2:42 PM
Subject: [TowerTalk] Tower Lighting
>I have access to a 325' tower for my remote station, and like to assist the
>tower owner where possible.
>
> The tower lighting is controlled by a light sensistive switch working a
> relay which actually controls the lights. The relay controller appears to
> be home made and did have a large open frame relay in it - until the
> contacts completely disappeared! (The actual load from the lights is about
> 1200w on each of two phases.) I replaced the relay with a 30A contactor
> which I thought was overkill and it was fine for several years, but that
> is now getting unreliable. Clearly there is a pretty heavy switch on surge
> with incandescent lamps, but this must be true at all tower sites.
>
> What do the professionals do? (I suspect the answer to that is spend
> several thousand dollars with Cutler-Hammer.....)
>
> 73 Roger
> VE3ZI
>
>
>
>
>
>
> _______________________________________________
>
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>
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