I seem to have a ground fault in my truck. I was working on the BMS, and when my finger touched one of the busbars, I got a shock. (forearm was leaning on the truck frame.) To find where it was coming from, I put a 1K resistor in series with my meter lead, tied the other end to ground, and set the meter to read ma. Touched the other lead to the pack, about 1/3 from one end - about 1.3 ma. Turned off the main breaker, which splits the pack into 4 (odd sized) sections. No leakage from the middle 2 sections, but about 0.4ma leakage amounts from either of the 2 "end" sections (about 32v ea). (both still have one end connected to the truck systems.) So I start disconnecting truck systems. Found that the leakage seems to be coming from the 2 small DC-DC converters (actually, power supplies) that I use to keep the Zilla powered up, and maintain the 12v battery. Both of these are UL approved isolated power supplies.
Now what? I need the DC-DC's, but I really do NOT want a ground fault. -- Worlds only All Electric F-250 truck! http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 _______________________________________________ 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)
