[b]Normally Closed (NC) Relays[/b]

[Tommy Walsh]

Just doing a bespoke install at the mo.

I need a relay that returns to ON when the power is back.

Does 'RC' in a relay code stand for automatic ReClosing?

and is this the same as Normally-closed (NC)?



Thanks in advance for any suggestions.

 

[Lokkars Daisy]

Most relays return to on when the power is back and would be called normally open NO

 

[oliver1234]

I'm not sure what the code RC means but NC contacts on a relay mean the contacts are closed when the coil isn't energised and they open when the coil is energised.

 

[oliver1234]

Many relays have two pairs of changeover contacts so you have a common, a normally open and a normally closed (twice)

 

[gerrin2owd]

Does 'RC' in a relay code stand for automatic
ReClosing?


RC (residual circuit)module
RC circuit modules are used for AC and DC coils. The reverse voltage peaks of the coil are limited by the RC module to approximately 2.5 times the nominal voltage of the supply. The relay release time increases insignificantly.

Taken from a RS data sheet