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Relay Coil and Its Normally Closed Contact
Connecting a normally closed contact of the relay with the coil of relay

Assume that we have a relay. If we connect the normally closed contact of the relay with the coil of relay and then connected them to the electricity what will happen?

By Steve Myres on 21 December, 2016 - 9:14 am
1 out of 1 members thought this post was helpful...

You will have invented the buzzer.

1 out of 1 members thought this post was helpful...

It will chatter until it burns the coil out.

Regards.
Gary

>It will chatter until it burns the coil out.

True if the relay's coil is the only load. But if there is any other load on the relay, I think the contacts would melt and weld before the coil burns out...

It's a race to failure of some sort either way.

>True if the relay's coil is the only load. But if there is
>any other load on the relay, I think the contacts would melt
>and weld before the coil burns out...

Ah Yes! That reminds me being on site many years ago....
a contactor was connected to a 37KW motor.

On switch on it chattered loudly for around 3 secs.. we couldn't stop it soon enough...

1 out of 1 members thought this post was helpful...

You haven't tried it yet, where's your sense of adventure?

You will have re-invented the buzzer.

Do it with an old GPO (post Office) relay (24vDC) - then touch the terminals to get a hefty belt from back emf's!