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Relay types - impulse vs latch?


  • To: <ukha_d@xxxxxxx>
  • Subject: Relay types - impulse vs latch?
  • From: "Andrew Richards" <andrew.richards@xxxxxxx>
  • Date: Fri, 15 Feb 2002 15:36:57 -0000
  • Delivered-to: mailing list ukha_d@xxxxxxx
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

I'm planning to use 12/24v relays for mains switching of lights etc, but
I've come across two different types of relay - impulse and latch.  As I
understand it, impulse relays are active only when the coil is energised,
whereas latching relays just require a momentary signal through the coil to
become and stay active.

Assuming this is right, I have a couple of qs:

1. Is an impulse relay damaged by keeping the coil active all the time?

2. How do you switch off a latching relay?

Any electricians out there?

Regards

Andrew


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