My solution was to use a 4pin twist-lock connector, it's in parallel to the J1772 socket. The pilot from the J1772 is connected to the neutral pin on the twistlock through a diode and load resistor. In order to enable the EVSE there has to be a dummy plug with a jumper from Neutral to GND in the twist-lock. That way no pins are exposed when the EVSE goes live.
Since the J1772 socket is is idiot proof I'm not really concerned that there is live voltage on those pins when I connect to the twist-lock. On Wed, Jan 15, 2014 at 2:08 PM, EVDL Administrator <[email protected]> wrote: > On 15 Jan 2014 at 11:00, John Lussmyer wrote: > > > Not if you do it "right". I have 2 charging inlets (120 and 240). I > use a > > pair of breakers with a mechanical interlock so only 1 can be ON at a > time. > > Maybe I'm missing something here, but why not use a 4-pin inlet, perhaps > similar to a modern clothes dryer plug? With the proper relays, connecting > 120 volts to neutral and one hot would activate the 120v charger and > connect > it to the battery; connecting 240 volts to neutral and the other hot would > activate the 240v charger and connect IT to the battery. There'd be no > exposed live pins that way. > > Make two pigtail adapters or inlet cables, one for 240v and another for > 120v. > > Not as elegant as some kind of automatic switching, but it should work. Or > is this somehow impractical? I'm just an electronics hacker (in the > positive sense), not an engineer. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- www.electric-lemon.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140115/41b07100/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
