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#1 Motor run capacitors.
Posted: Sun Nov 12, 2017 12:40 pm
by pre65
Accepted wisdom seems to be that the DC rating of motor run capacitors is AC volts X 1.4
So 440v AC X 1.4 = 616v DC
However, reading several articles on the Interweb there are suggestions that up to 2X the AC rating is still "safe".
Any comments ?
#2 Re: Motor run capacitors.
Posted: Sun Nov 12, 2017 12:57 pm
by IslandPink
I look forward to any answers with interest because I was never brave enough to use a 2x or >2x rating myself, I always stuck to about 1.4 or 1.5 as the max. The 440's, I've heard in some places are OK to 1000v DC for instance.
#3 Re: Motor run capacitors.
Posted: Sun Nov 12, 2017 1:17 pm
by Nick
I would just go by the makers spec sheet.
#4 Re: Motor run capacitors.
Posted: Sun Nov 12, 2017 1:23 pm
by IslandPink
Nothing on this one about DC -
https://www.galco.com/techdoc/gecp/97f5300_dat.pdf
Will keep digging.
#5 Re: Motor run capacitors.
Posted: Sun Nov 12, 2017 1:26 pm
by IslandPink