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Date: Tue, 23 Aug 2011 13:23:44 -0400
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] The Case for Solid state Relays (SSR)
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Kelly Troyer wrote:
> 
> Ed & Group,
>        I brought up the question of possible use of Solid State Relays 
> (SSR) to replace the
> electro-mechanical contactors most of us use in our flying electrical 
> systems but I need 
> to depend on the smarter "EE" (Electronic Engineer) types of our group 
> to tell me if this
> would be a good idea......
>  
> http://www.power-io.com/products/hdd.htm
>  
> http://www.power-io.com/library/databulletin/hdd-family.pdf
>  
> http://www.power-io.com/library/databulletin/hdd-e-family.pdf
>   

I tried using one of these.  I know my situation is different, in that I'm using a generator, not an alternator.  The 
issue I ran up against is that the regulator could not sense the bus voltage, and never turned on.  It least, that is 
what I suspect the problem was.  I wasn't getting any voltage out of the regulator with the SSR installed.  I replaced 
it with a fusible link, and now everything works just fine.