A 400 V 120 uF Elco, electrolytic condensator case

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abdulbadii

Joined Aug 30, 2017
38
A 400 V 120 uF ElCo was in a device circuit so both were used and the Elco got charged then the device was unplugged and the Elco was shorted in 3 sec or so (very first is big spark) and DMM read it's 25 V

next nearly an hour it's read, it's 121 V

then it was shorted in 3 sec or so and DMM read is 4 V or so

next nearly quarter hour it's read as 13 V or so

then it was shorted in 3 sec or so and DMM read is 2.9 V or so

next 9 s or so the DMM read is 9 V or so

then it was shorted in 3 sec or so and DMM read is 0.5 V or so

next 9 s or so it was shorted in 3 sec or so and DMM read it's 0.03 V or so

next 9 s or so it was read and it's 0.21 or so

The last 5 step is when it's been separated from circuit, ensure it behaves on its own

Pretty scary voltage rise, so help answer
Is this Capacitor / Elco behavior acceptable & normal or no, either, what actually scientific explanation on this Elco having a voltage regain/rise behavior ?
 
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