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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Technical Advice => Topic started by: Revol on June 04, 2015, 04:56:14 PM

Title: Magnetic Locks ? Residual Magnetising
Post by: Revol on June 04, 2015, 04:56:14 PM

Anyone aware of any guidance on the above? 

Title: Re: Magnetic Locks ? Residual Magnetising
Post by: wee brian on June 05, 2015, 09:27:54 AM

This used to be a problem when Maglocks &  hold opens were first introduced. It was necessary to release them overnight or they would become permanent magnets. I was under the impression that the technology has moved on and its not really an issue any more.

Title: Re: Magnetic Locks ? Residual Magnetising
Post by: Tom Sutton on June 05, 2015, 09:55:51 AM

As wee brian has said magnetic hold open devices was a problem years ago but laminating and using modified iron cores seems to resolved the matter.

Title: Re: Magnetic Locks ? Residual Magnetising
Post by: Revol on June 10, 2015, 09:37:09 AM

Cheers Chaps