Quote:
Originally Posted by Hartley118
I'm surprised that National Grid haven't yet corrected the discrepancy in the mean frequency, leaving our synchronous clocks 1-2 minutes slow. Does anyone know whether we now have a permanent error which will remain, meaning I should go round resetting our clocks, or will the Grid gradually correct them?
|
Doubt it will be corrected now.
The requirement is to retain 50Hz averaged over a 24 hour 'window' so any correction to a frequency error has to be made during that time. If it wasn't, it's too late - because, doing a correction now, for instance, would give a frequency error in THIS 24 hour window.
I wouldn't like to think I was commissioning a synchronous clock today, but might have to adjust it in a few days' time!
However, if National Grid have missed some cycles, I'd expect them to announce their error. I am surprised there's no legal obligation for them to do so - or is there?