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In Reply to: RE: Discharge across the terminals of the electrolytic cap..... nt. posted by 6bq5 on January 12, 2017 at 22:23:58
6bq5, yes but what was bugging me is that the amp is totally isolated, no connection to earth so this is a virtual gnd. I conclude that there must be a potential difference between the terminals on a cap in order for it to discharge. Education is welcome.
Follow Ups:
yes but what was bugging me is that the amp is totally isolated, no connection to earth so this is a virtual gnd. I conclude that there must be a potential difference between the terminals on a cap in order for it to discharge. Education is welcome.
Earth ground is not involved. What you are doing is discharging the DC stored energy in the cap by connecting a load, resistor, across the B+ and B- terminals, leads, of the cap.
The cap is connected in parallel with the B+ and B- rails, legs, of the DC power supply. The power supply, where a metal chassis is used, the B- rail of the power supply is connected to the metal chassis. The metal chassis becomes the ground plane for the power supply.
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