[Amps] solid state relays

Mark Robinson markrob at mindspring.com
Thu Sep 4 22:23:22 EDT 2014


I am using a big 30 amp 240V variac here and it would trip my 30 amp 240V 
breaker when I powered up the variac on it's own with no load.  I had to 
install a surge limiter on the variac to prevent this from happening FYI


73 Mark N1UK



----- Original Message ----- 
From: "glenn riccio" <gfriccio at hughes.net>
To: <amps at contesting.com>
Sent: Saturday, 30 August, 2014 6:51 PM
Subject: [Amps] solid state relays


> Hello all , I'm in the process of collecting components for another GG amp 
> I
> am building.
>
>  I have some questions on the hv power supply. I'm building a very
> conventional supply. Most schemes use a big ole contactor and power 
> resistor
> for the soft start circuit on the primary side ( of course) . Has any one
> tried using a solid state soft start relay instead ? Crydom has several 
> that
> I'm considering. They all need DC for the input switching , but could just
> build a little 12v dc supply for it. I'm using a big Variac in the primary
> side and don't want a conventional contactor because it might kick out at
> lower voltage settings. Any advice would be appreciated.  Thanks , Glenn
> K7GFR
>
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