On Mon Nov 11 09:47:56 PST 2019 ev@lists.evdl.org said: >cor.vandewa...@gmail.com said: >>> You do not really have a ground fault, it seems your power supplies have an >>> input circuit that causes a small current to ground > >John, are these built as DC/DC converters? Or are the AC-input power >supplies that you are using with a DC input?
AC Power supplies >AC power supplies usually have noise filter caps, and resistors to >discharge these capacitors when unplugged to satisfy UL requirements. >It's common to find capacitors from hot and neutral to ground, and a >high-value resistor or two to ground to discharge them. One has a ground, which isn't connected, and the case is on a plastic board. >If the supply has no ground pin (2-wire cord or wall-wart), then there >will be a capacitor and resistor from the AC input side to the output >side, in the hopes that the output negative side "might" be grounded. The other is 2 wire only - but it a potted unit, no way to get inside. So, it sounds like I need to find a real DC-DC converter that can take 330vdc and make 13.8vdc. Pretty much the opposite of every unit I've ever seen. -- Bobcats and Cougars, oh my! http://john.casadelgato.com/Pets _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
