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Old 09-19-2021, 11:52 PM   #48
Join Date: Feb 2021
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Posts: 51
Default Re: Powerware 9120 Online UPS

Originally Posted by Behemot View Post
leakage current is the last parameter that should bother you;
watch ESR so it does not differ too much, some driving circuitry is tuned to certain ESR and shifting that too much could cause unexpected behaviour
but leakage current in theory may reduce working time on batteries isn't that?

about ESR agree with you, I repaired my old Metcal soldering station this weekend and it took me a couple of hours to pick up a capacitor. The ones with ESR less than 150 mOhm caused sync failure (although the description of the chip says the problem is <30 mOhm) as a result I put capacitor with ESR 200 mOhm

Last edited by AleXis6; 09-19-2021 at 11:54 PM..
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