Magnus wrote:
So, I do not completely agree that a through-zero measurement with a TIC has all the information
No, a series of time-stamped zero crossings doesn't have all of the information in the original signal, and a small glitch that occurs during the middle of a cycle (far away from a zero cross) could hide and show nothing more than a slight displacement of one or two zero crosses. Grid-nuts can ignore such short glitches. Utilities can't, particularly in today's cybersecurity environment. Horses for courses.
From my observations of the AC mains while I was testing the simple ZCD, I would expect such hidden glitches [that are real grid-related phenomena, not just someone starting a motor downstairs] to be very rare. The grid phenomena I saw typically last more than one grid cycle and thus affect more than one zero cross, and/or are large in magnitude and cause serious displacement of at least one zero crossing, or several extra zero crossings.
Best regards, Charles _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
