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Overvoltage?

Overvoltage?

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That's our mains voltage/frequency chart from the last hour, drawn by the AEG UPS web client.
The voltage ~246V is quite typical here. I've seen some peaks up to 252-254V but the values around 246V seem to be most typical.

While I haven't normally used incandescent GLS for about 15 years, I've used some old 220 V rated lamps at special places here and they've had quite a decent life on such an overvoltage. I'm not concerned anymore.

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Ash
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Feb 02, 2018 at 04:50 AM Author: Ash
In rarely switched lamps, the lamp life in years will still be very long, even when the life in hours is shortened by the overvoltage

For pretty much anything else, 250V..260V is not as much of a problem. Few things come to mind though :

- It is nearing 280V, which is the limit for stuff using rectified line voltage and 400V electrolitic capacitor, so maybe something with aging capacitor won't be too happy about it (but then if the capacitor is in that bad shape, it would probably go out soon anyway)

- Few appliances use rectified line voltage and 350V electrolitic capacitor. Notably old (80s.. early 90s) Electronic ballasts. Those wouldn't be happy already with 250V. Considering their age, they wouldn't be happy at all...

- Some devices like "surge protectors" use MOVs, and in a few of them thevaristors could be rated as low as 430VDC (so ~300V assuming perfect sine wave and ideal MOVs, but could be as low as 270V if we take into account some minor line disturbances and thermal runaway of the MOVs themselfes). "surge protectors" with so low rated MOVs could be lasting quite short on such voltage
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Adam


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Feb 02, 2018 at 12:22 PM Author: merc
Interesting - didn't know that surge protectors could be damaged by overvoltage. I supposed they were designed to withstand and filter it.
Hopefully the damaged surge protector disconnects the output instead of keeping it unprotected.

Not a misoLEDist...

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