Re: Voltage variating between 220, 230 and 240 heree. « Reply #1 on: July 17, 2020, 12:25:09 AM » Author: Medved
There could be some large, but otherwise fixed loads causing varying voltage drops in the area, which are switched on and off over the day (water distribution pumps,...). Other cause could be some substations compensate varying downstream voltage drop by switching their output voltage in steps (5%, so 10V on a 230V level would be a reasonable step), so the far end does not droop that much. Then if you are connected close (from volrage drop perspective) to that substation, you see these distinct steps. These corrections are usually not done on the last 22/0.4kV transformer, but rather on thhe higher xxx/22kV substation. And the branch going to your home has not that much changing load or has very low drop in general...
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	Re: Voltage variating between 220, 230 and 240 heree. « Reply #3 on: July 17, 2020, 01:12:19 AM » Author: dor123
In my hostel, the voltage often varying between 205-225V, where it should be 230V. Also, power dips are common.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Voltage variating between 220, 230 and 240 heree. « Reply #6 on: July 17, 2020, 03:07:23 AM » Author: Medved
Quote from: Binarix128 on July 17, 2020, 12:36:04 AM Here the oficial voltage is 220V so a 5% variation it's ok, but the variations in my zone are of almost 10% more voltage. I've not seen 210 or 200V here. In the countryside huge variations are normal, but in the middle of the city where I live should not. The 5% usually applies for longer term average (hours or longer; to maintain performance of devices like heaters or so). The short time variation could be way higher, devices are supposed to tolerate >15% short term dips/overshoots (so with 230V it is 200..260V range). Here the nominal voltage was 220V +/-10% long term, then the tolerance tightened to -5/+10% (during the 80's) but then (around 1990) chaged to 230V +5/-10% (so in reality no real change at all, just the sticker numbers were "aligned"), then the tolerance was widened to +/-10% again (to accommodate more load on existing infrastructure; as the old "220V" equipment was expected to be already retired)
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	Re: Voltage variating between 220, 230 and 240 heree. « Reply #7 on: July 17, 2020, 09:34:30 AM » Author: Rommie
We're fortunate here in that our supply is quite stable. We are literally across the street from the nearest substation so we do get a slightly higher than normal voltage (245V) but it does vary from 241 to 247V according to  the monitoring function in our UPS. Can't really explain why your supply varies so much, though
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Ria (aka Rommie) in Aberdeen
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	Re: Voltage variating between 220, 230 and 240 heree. « Reply #9 on: July 17, 2020, 02:25:55 PM » Author: HPS_250
That’s interesting that your voltage is varying a lot. Here in the US I get a pretty constant voltage all the time, usually around 115-121V. When there’s a high load on the system it might drop to around 113-114v.
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I’ve always been interested in all kinds of lighting, mainly incandescent and HID, and especially all kinds of sodium lamps (HPS/LPS). I’ll tolerate LED but I’m not a fan of it.
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	Re: Voltage variating between 220, 230 and 240 heree. « Reply #11 on: July 18, 2020, 01:19:35 AM » Author: dor123
Yesterday, at 19:10, suddenly the lights at my room dimmed out, especially the Osram/Ledvance LED filament lamp on  my computer table lamp. I thought a brownout began, so I opened the UPS shutting down software only to see that the voltage is 203V. I entered the data log to document the event, and seen that at the moment the lights dimmed, the voltage dropped down from from 209.3V to 201.4V: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-182429
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Voltage variating between 220, 230 and 240 heree. « Reply #14 on: July 22, 2020, 04:54:19 AM » Author: dor123
Quote from: LINKS on July 18, 2020, 05:44:10 AM I am at the end of a long right of way way out in the bush, I am recording under 200 volts some nights, I don’t think I have ever seen 240 volts on the tester I have been asking for a data log to be installed for over 3 years, it’s realy annoying, I understand it should be within 6% of 240 V, the Ashram up the track is pulling over 60 amps the linesman told me when the little transformer failed. Under 200V is enough to stop compressor motors and stuck them in starting mode and to dim incandescent, LED filament lamps and small G9 LED lamps. See what happened in my hostel during the last brownout: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-178182
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.