19. September 2011

Latching Relays

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Latching relays are also called “keep”, “impulse” or “stay” relays. It has two relaxed states – bistable.  It is bistable because when current is switched off, it remains in its last state. This can be achieve by two methods.

1. A solenoid operating a ratchet and cam mechanism.: The first pulse to the coil turns the relay on and the second pulse turns it off

2. By having two opposing coils with an over-center spring or permanent magnet to hold the armature and contacts in position while the coil is relaxed : a pulse to one coil turns the relay on and a pulse to the opposite coil turns the relay off. This type of relay has the advantage that one coil consumes power only for an instant, while it is being switched, and the relay contacts retain this setting across a power outage.

Latching relays are widely used because conventional relays need constant supply of voltage or power but latching relays dont.

Latching relays are not always that easy to find . You may find them in ebay but this ( www.sherburn.com )online site exclusively deals with latching relays products. I found it very useful

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  • 40 Comments

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    1. herb grinders london From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 20. September 2011 at 2:24 pm

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    2. bradstone roof tiles From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 20. September 2011 at 2:52 pm

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    3. skip hire sale From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 20. September 2011 at 4:27 pm

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    4. renewable energy ireland From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 22. September 2011 at 2:29 pm

    Good article, we come across a lot of equipment like this. Thanks for sharing your knowledge :)

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    5. solar panels manchester From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 22. September 2011 at 4:20 pm

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    6. solar panels bedford From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 22. September 2011 at 5:08 pm

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    7. pool builders sussex From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 23. September 2011 at 1:51 pm

    Thanks for the interesting article, we often use electrical components wtih some of our installations. Thanks for sharing.

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    8. swimming pool kits From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 23. September 2011 at 3:41 pm

    Fascinating read, you offer insightful and important information. Thanks, nice blog too.

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    9. scrap metal liverpool From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows NT on 23. September 2011 at 4:48 pm

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    10. seslieses From TURKEY (TURKEY) Wrote Using Safari Safari 535.1 on Mac OS Mac OS X on 01. October 2011 at 8:28 pm

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    11. girls hot photos From CHINA (CHINA) Wrote Using Safari Safari 535.1 on Mac OS Mac OS X on 11. October 2011 at 7:51 pm

    Latching Relays very useful

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    12. Night vision infrared illuminator 95.5.2.200 not found Wrote Using Internet Explorer Internet Explorer 9.0 on Windows Windows NT on 14. October 2011 at 4:21 pm

    We use latching relays for our night vision infrared illuminators.

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    13. John Barnett From INDIA (INDIA) Wrote Using Mozilla Firefox Mozilla Firefox 6.0.2 on Windows Windows XP on 14. October 2011 at 5:54 pm

    Very interesting article, love this article.

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    14. Darling From PHILIPPINES (PHILIPPINES) Wrote Using Mozilla Firefox Mozilla Firefox 3.6.20 on Windows Windows NT on 15. October 2011 at 8:45 pm

    I don’t even understand the very concept behind it back in my college days. We use to have a lot of these in the boardroom under the EE curriculum. I wish I was just as bright then as I was now.

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    15. Search engine optimisation From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows NT on 18. October 2011 at 7:00 pm

    Useful and informative article, electrical items will always be necessary just like us our SEO people! Nice blog :)

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    16. personal trainer blackpool From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows NT on 18. October 2011 at 7:02 pm

    Great stuff, thanks for sharing your insights.

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    17. Lee From AUSTRALIA (AUSTRALIA) Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows XP on 20. October 2011 at 2:14 am

    Latching relays are one of those machinery which are really hard to find. Thank you for the ebay store link. I was looking for something like this.

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    18. Toko Baju Muslim 180.253.125.134 not found Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows XP on 01. November 2011 at 9:11 pm

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    19. electrician kings heath From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows NT on 03. November 2011 at 2:45 pm

    Brilliant and insightful information. I use a lot of relays and your details are spot on.

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    20. seo companies manchester From UNITED KINGDOM (UNITED KINGDOM) Wrote Using Mozilla Firefox Mozilla Firefox 7.0.1 on Windows Windows NT on 03. November 2011 at 3:21 pm

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    21. Harry 182.71.22.106 not found Wrote Using Mozilla Firefox Mozilla Firefox 3.6.23 on Windows Windows XP on 07. November 2011 at 9:37 pm

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    22. branded water 182.71.22.106 not found Wrote Using Mozilla Firefox Mozilla Firefox 3.6.23 on Windows Windows XP on 07. November 2011 at 9:56 pm

    Great way of explaining, i loved way of drawing, pictures always more helpful to make understand, sure in future want to follow it..

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    24. americki plakari 109.92.201.49 not found Wrote Using Mozilla Firefox Mozilla Firefox 8.0 on Windows Windows NT on 18. November 2011 at 4:21 pm

    Very interesting article, love this article.

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    25. Fotoselli From TURKEY (TURKEY) Wrote Using Internet Explorer Internet Explorer 9.0 on Windows Windows NT on 16. December 2011 at 4:34 am

    OK. What about latching walves?

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    26. Resim Kursu From TURKEY (TURKEY) Wrote Using Internet Explorer Internet Explorer 9.0 on Windows Windows NT on 16. December 2011 at 4:38 am

    Thanks, nice article and nice blog too.

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    27. burnham boilers From SINGAPORE (SINGAPORE) Wrote Using Safari Safari 535.7 on Mac OS Mac OS X on 18. December 2011 at 9:36 am

    Thank you sharing these Latching relays products. They are very helpful to me.

    Ragul,
    burnham boilers

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    28. Rca ieftin From ROMANIA (ROMANIA) Wrote Using Mozilla Firefox Mozilla Firefox 8.0.1 on Windows Windows XP on 19. December 2011 at 7:21 pm

    Nice article. Very useful information.

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    29. kabus From TURKEY (TURKEY) Wrote Using Safari Safari 535.7 on Mac OS Mac OS X on 24. December 2011 at 9:37 am

    We use latching relays for our night vision infrared illuminators. . .

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    30. Edward From AUSTRALIA (AUSTRALIA) Wrote Using Mozilla Firefox Mozilla Firefox 3.6.22 on Fedora Linux Fedora Linux on 30. December 2011 at 12:46 pm

    I too relied on ebay for getting latching relays.But now it seems that I can get it from the site that you have mentioned.

    Thanks for sharing this valuable info.

    Used Class B RV

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    31. andy@Atlanta appliance repair From UNITED STATES (UNITED STATES) Wrote Using Mozilla Firefox Mozilla Firefox 10.0 on Windows Windows XP on 17. January 2012 at 12:28 am

    I never found latching relays that hard to find. used to buy a lot of them to fix stuffed animal games (crane games).

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    32. Felipe Sparks From UNITED STATES (UNITED STATES) Wrote Using Safari Safari 534.52.7 on Mac OS Mac OS X on 17. January 2012 at 2:10 am

    Launch relays are fairly easy to find thanks to google’s search engine. But thanks for the link. I’d recommend comparing prices though.

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    33. Vance Miller From UNITED STATES (UNITED STATES) Wrote Using Safari Safari 535.7 on Mac OS Mac OS X on 31. January 2012 at 1:08 am

    Great resource link for latching relays. I’ve been able to get a few off of ebay but have had a hard time finding them used from other “second hand electronic sites.”

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    34. sikis From TURKEY (TURKEY) Wrote Using Mozilla Firefox Mozilla Firefox 3.6.25 on Windows Windows NT on 01. February 2012 at 1:51 am

    aslinda bazi seylerin olabiliritesi var ama neden cozum bulmuyorlar bilemiyorum bu durumda bir cozum getirilmesi gerekli buradan yetkililere sesleniyorum.

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    35. Kenan denizci From GERMANY (GERMANY) Wrote Using Mozilla Firefox Mozilla Firefox 10.0 on Windows Windows XP on 10. February 2012 at 5:05 pm

    Great resource link for latching relays.

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    36. Limon Ahmed From BANGLADESH (BANGLADESH) Wrote Using Mozilla Firefox Mozilla Firefox 10.0.1 on Windows Windows XP on 15. February 2012 at 4:32 pm

    This a great Post to me. I never hire about Latching relays before read your post. I just Read it from your Post and it is really very interesting to me.
    Thanking you for sharing the Awesome post.

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    37. Firma Rehberi Sc From TURKEY (TURKEY) Wrote Using Mozilla Firefox Mozilla Firefox 10.0 on Windows Windows NT on 21. February 2012 at 6:23 pm

    Hadi Bakalım Güzel Bu

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