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Topic Title: mains frequency a bit off??
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Created On: 16 June 2017 08:52 PM
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 16 June 2017 08:52 PM
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kellyselectric

Posts: 114
Joined: 22 July 2016

Hi I was reading on another forum that synchronous clocks have been running slow by up to 2 minutes for a coup!e of days then slowly correcting to being only a minute out. Is this just a thing with a certain type of clock or has their been a problem with mains frequency? I just wonder if maybe the grids Runing slow anyone know??
 16 June 2017 11:24 PM
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mapj1

Posts: 9107
Joined: 22 July 2004

record of UK frequency on gridwatch
Click on 'download' then none to turn off all the logging, then on freq to record freq only and download big table. From what I can see not a far off centre, wobbles between +/- 0.2hz of nominal

Average last 48 hours is 49.9628901

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regards Mike
 17 June 2017 10:54 AM
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ToniSM

Posts: 318
Joined: 21 November 2006

If it's only the grid frequency you want have a look here http://www.dynamicdemand.co.uk/grid.htm

It's running a bit fast at the moment

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Could there be a better way?

In theory yes, but in practice?

Edited: 17 June 2017 at 11:00 AM by ToniSM
 17 June 2017 05:37 PM
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davidwalker2

Posts: 289
Joined: 29 April 2009

Mike, have I got this right?

49.9628901 Hz is 0.999257802 of 50Hz. 48 hours has 2880 minutes, so a synchronous clock would only register 2877.86246976 over the last 48 hours minutes,that is just over 2 minutes slow.

This is pretty much what my clock has registered.

David
 17 June 2017 06:19 PM
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kellyselectric

Posts: 114
Joined: 22 July 2016

Thank you for all your replies I think that the 2 minutes drift on the clocks is normal judging by the last post. I'm sure its just that the person who noticed it maybe didn't realize it was something that happened often and maybe just got a bit panicked for want of a better phrase
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