As a tech using a lot of mains sensitive equipment with about 25 years of suffering the bad power in NZ I would suggest that if the ups is fine today you have 2 options 1. Brown out - Very good chance on this, the average UPS switches fast to avoid letting the power fall to low, so if the NZ supply, usually 240V falls to say 200-210 ( supply company doing line maintenance and running on a temp (not very stable ) supply arrangement) your lights will be fine, most equipment will work fine ( but you toaster will take longer to make toast) and the ups will try to switch to battery. if you are right on the ups switching threshold ..... lots of clicking. 2. the ups batteries could be suspect. I assume you test them occasionally ?? Its amazing how many problems a tired cell in a battery causes a ups. On the aside, I looked at our data from last night and we didn't see anything north of Hamilton. so its at most a local thing. daylight saving was 2am, so it shouldn't be involved, I go for early morning hot wire line maintenance as a rough guess. WEL seem to like to do a lot at night nowadays On 3/10/2005, at 8:55 AM, Chris O'Halloran wrote:
Hello,
As an electrical engineer with 10 years experience working in electricity distribution systems, I doubt very much it would have anything to do with the lines company signalling system
Unless you can record a power quality or disturbance issue, I would suspect the problem is with the UPS.
Good luck,
On Sunday 02 October 2005 23:01, Kyle Carter wrote:
Just an inquisitive question. My UPS seemed to go mental last night/this morning (around midnight Sat Oct 1st) flicking between battery and mains repeatedly for a few hours.. But no flickering lights or anything..
Im wondering if anyone else had something similar? Im assuming it may have been the power company doing something weird re: daylight savings?
Kyle Carter