Home Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Re: could my SS relay be dead?

When relay contacts are open you should read voltage accross them. (240VAC)

When the relay contacts are closed you should read 0 volts accross them.

Same for a solidstate relay.

When it is off you should read the entire voltage you are switching.

When on you should read a very low vlotage (Datasheet says max on state voltage drop 1.5V)


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