Odd to have a power cut today, not as if there's a storm or something.
First of all they tried a remote reset three times, then left it for 10
minutes and tried twice more - the second of which fixed it.
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On Sun, 22 Jan 2017 19:01:56 +0000, Tim Streater wrote:
Oddly, we had a water cut. (burst main down thew road, fixed within two
hours)
I was panicking a bit because they came and fixed a MAJOR underground
leak on our property on Friday [1], and I was afraid something had gone
wrong with that.
[1] Discovered when they fitted a water meter. Free fix. Leaking 1.5
cubic metres a day.
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Ha, there was a big leak at the southern end of Hollow Lane the other
day, with a river flowing downhill under the A2 and into Wincheap.
Freezing as it went.
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I've always used the term "power cut" to mean a deliberate removal of the
supply. What mostly happens is a power failure. Here we had a short one
on Friday. According to someone posting on Streetlife it was caused by a
fault "at the exchange". Actually it was at a sub-station a few miles away.
I assume so, I have very limited knowledge of that sort of gubbins on
lines. The lights went out, then about a minute later, went on/off with
a brief flash, and the same again twice more with about 10 sec
intervals. Then the 10 min break while we got some candles lit, then
another flash, and finally came on 10 sec later.
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Apart from the enforced cuts during the miners' and power
workers' strikes of the 1970s and the great hurricane, I
couldn't remember power cuts until I started working on the
Isle of Dogs in late 1990.
There, power cuts were a daily occurrence, both on and off
the 'island' and, as I was working for a cable TV company
they didn't do much for reliability!
Obviously the infrastructure couldn't cope with the massive
Docklands expansion but, hopefully, they've got it fixed by
now ...
On Mon, 23 Jan 2017 11:34:52 +0000, Terry Casey wrote:
We had one a couple of weeks ago. Lasted about 5 minutes with no
autocloser false starts afterwards.
Didn't really affact us at all. Emergency light came on, PC and Internet
kept going!
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Had a 'blip' the other day - lights went off and on within a second.
Monitor rebooted, main fully-loaded PC kept going, NAS1 with 5 disks
rebooted, identical NAS2 with 2 disks kept going, router rebooted.
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(\_/)
(='.'=) systemd: the Linux version of Windows 10
We DID have a power cut here, on the outskirts of Lincoln
about 3 months ago. I was in the local pub - where else? -
when I got a panic call from my wife to say all the lights
had gone out! She hadn't, at that stage, looked outside or
realised that the WiFi was no longer working on her phone.
I looked out of the pub doorway and noticed it looked rather
dark on the road that led home ...
When I left, a guy on a cherry picker was busily splicing
cables at the top of the utility pole - distribution on the
main roads is overhead but the side roads are cabled
underground - and his colleague explained that the problem
was caused by a faulty transformer and the supplies were
being transferred to another source.
Sure enough, half way bavk home the street lights came back
and power had already been restored at home some time
previously. I was quite surprised by the speedy response and
wondered if, perhaps, an alarm had been generated when one
phase had gone down and power to the remaining properties
had been maintained until the crew arrived.
On Sun, 22 Jan 2017 19:01:56 +0000, Tim Streater wrote:
Just a few seconds for each on off period once it started before
staying off? An auto-recloser doing its job, detects fault (earth
leakage, not sure about overload, I'll have to ask...) disconnects
the supply waits a second or three and reconnects. If the fault is
still there it trips again and will try a third time before locking
out and needing a manual reset.
This means that a lighting strike or tree growth touching the line
doesn't put people off supply for extendend periods. Errant tree
growth gets vapourised when it touches the line so very rarely has
repeat performance until it's grown back...
The three trips don't have to be straight after each other, IIRC
three trips in three, may be 5, minutes will cause a lockout. This is
fine until the fault is intermittent and takes longer than the reset
period to re-occur. We've had that, after the first 4 or 5 on/off/on
cycles in ten minutes I switched the CU's off, gawd knows what is
happening to the supply...
They may have been trying to find a leaky insulator. They have some
device that measures earth currents and by moving those device(s)
about the local network can determine the section with the fault.
They'll then reroute the supply to unaffected sections before fixing
the real fault.
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