On 09/03/2013 09:03 PM, Fred Klein wrote:
>
> I'm wondering if anyone has installed or has the expertise to evaluate these:
>
> http://www.periheliondesign.com/powerlinkjr/PowerLinkJrIIIManual.pdf
>
> thanks for any insights,
Yeah, I have seen them too. For some purposes they could be fine.
However I just use regular switches for almost all low power purposes.
In the case I need relays (like for high current devices) I like to use
real relays instead of SSR's. Look at the heat sink these SSR's have.
They are there for a reason. The reason is voltage loss (and subsequent
heat production in the relay). And one of the reasons you use a relay
instead of a switch is to eliminate voltage loss due to lenghty wires.
So these SSR's negate their own purpose in some way.
I use regular car relays for high current switching purposes. Our
aircraft see much daily less use than cars, and if these relays are fine
for daily use in a car, they should be fine for an aircraft as well.
Frans
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