Hi Michael, Just as Tom says, the 1238-6501 Curtis controller is designed for 80V nominal voltage systems. I did the mistake to order this controller for a 32 lithium cells 3.2V x cel, 102.4V nominal and realized too late when I tryed to run the system on a just fully charged pack. I noticed the 'pre-programmed' high voltage cutoff from HPEVs software was 105.1Volts altough the internal caps can support little higer.
I would not recommend to go to the factory OS if it comes from HPEVs with the motor as a kit. Especially if you have latest firmware versions. HPEVs firmware version has lot more performance than Curtis OEM version. Marco Gaxiola EnergyEV.com On Mon, Feb 20, 2017 at 1:35 PM, Tom Keenan via EV <[email protected]> wrote: > The 1238-6501 uses 48 to 80 volts DC (nominal). The voltage of the pack > will likely be a bit higher than the nominal rating. > As an example, a 48 volt (nominal) lead acid pack might have a fully > charged resting voltage around 52.5 volts, and similar 72 volt pack would > have a resting voltage just under 80 volts. If someone made up an 80 volt > pack, the resting voltage would be about 88 volts or so. > > That being said, what is more important is the highest voltage expected on > the system. This will happen when the battery pack is being charged. The > maximum voltage on a 72 volt pack while finishing a charge is about 92 to > 96 volts, or about 100 to 104 volts on an 80 volt lead acid system. These > are approximate numbers. (finishing/equalizing voltage varies by battery > manufacturer, and occasionally by charger programming facility). > > The highest potential charging voltage for an 80 volt nominal system is > close to the 108 volt number you have - I would consider that to be an > absolute maximum voltage that is encountered on rare occasions. > > Anything higher than an '80 volt' pack risks popping this controller. > Staying with 72 volts max (nominal) will give you a good safety margin and > longer controller life. > > Tom Keenan > > > On Feb 20, 2017, at 10:17 AM, m gol via EV <[email protected]> wrote: > > > > Hello > > > > What is the maximum voltage of a Curtis 1238-6501 controller? > > > > EVWest is telling me 75 volts, but I have heard 108volts? > > > > Thanks > > > > Michael > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170220/f11d5320/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
