Author Topic: Power Supply Failure (with Ultraviolet Radiation)  (Read 7234 times)

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Offline blueskull

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Re: Power Supply Failure (with Ultraviolet Radiation)
« Reply #25 on: November 15, 2016, 07:18:30 pm »
Ageing in MOVs is a thing, actually: characteristics vary over time and with surges applied and it will degrade so that at some point it will die because of a surge it handles a thousand times before...

It ages with each surge*, but I don't think time is a bug issue for MOVs.

*: Which means it is not a permanent device. Just like flash memory, after you use it a certain amount of times, it will deteriorate.
 

Offline metrologist

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Re: Power Supply Failure (with Ultraviolet Radiation)
« Reply #26 on: November 15, 2016, 08:05:43 pm »
The part I salvaged came out of a DOA power supply unit that I stripped.
 

Online Ice-Tea

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Re: Power Supply Failure (with Ultraviolet Radiation)
« Reply #27 on: November 16, 2016, 07:02:20 am »
Ageing in MOVs is a thing, actually: characteristics vary over time and with surges applied and it will degrade so that at some point it will die because of a surge it handles a thousand times before...

It ages with each surge*, but I don't think time is a bug issue for MOVs.

*: Which means it is not a permanent device. Just like flash memory, after you use it a certain amount of times, it will deteriorate.

True. But installed and working it is likely to be submitted to a surge from time to time. So age and #surges are probably correlated.


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