[TowerTalk] Tower Lighting

[Mark Robinson]

the 35 amp mercury wetted relay looks like a good bet to me..those contacts 
should hold up for a very long time.....end of problem


http://www.mercuryrelays.com/shoppingcart/agora.cgi?&product=35amp




----- Original Message ----- 
From: "Mark Robinson" <markrob at mindspring.com>
To: <ve3zi at rac.ca>; "Tower and HF antenna construction topics." 
<towertalk at contesting.com>
Sent: Wednesday, 21 April, 2010 4:15 PM
Subject: Re: [TowerTalk] Tower Lighting


> Look at this relay 100 amp mercury wetted relay contacts
>
> http://www.mercuryrelays.com/merc100amp.htm
>
>
>
> ----- Original Message ----- 
> From: "Roger Parsons" <ve3zi at yahoo.com>
> To: <towertalk at 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
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk