Ananda Alumni: Mercury relay question [RE-wrenches]

[Mick Abraham]

Hi, 

My client's RV needs a "low voltage disconnect" for the 12 volt 
circuits...and we also want a remote control for "manual off" so a 
normal C-40 type control won't work. 

I may build a control with a mercury displacement contactor for the 
switching, and the Morningstar Relay Driver for the deciding. 

As installed in the Ananda Powercenter, these mercury relays have some 
cryptic components on the coil terminals and I wonder if I need those in 
my application? It looks like there's a diode in series with the coil 
control voltage, and a second diode wired reverse bias across the coil. 

What are those widgets for? Do I need them?

Mick Abraham, Proprietor
www.abrahamsolar.com


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