On 20 Mar 2022 at 13:52, David Nelson via EV wrote: > I first thought that I could install a NO relay with an AC coil which > would close when the AC cord was plugged in and so ordered one. Then I > thought I better see if there is any arcing when connecting the > charger to the battery pack. Yep. There is a nice pop when connecting > the charger so a relay/contactor would not last very long with that.
It sounds like your charger has an electrolytic capacitor across its output. Could you add a precharging circuit across the contactor? That would be another relay with a resistor in series. Close the precharging relay first, so the cap is charged graduallly. Then after 5-10 seconds, close the main relay. Or instead of a blind timer, have a circut watch the voltage across the contactor, and close it when the voltage gets close enough to zero. David Roden, EVDL moderator & general lackey To reach me, don't reply to this message; I won't get it. Use my offlist address here : http://evdl.org/help/index.html#supt = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = There'll be one corporation, selling one little box. It'll do what you want, and tell you what you want, And cost whatever you've got. -- Greg Brown, "Where is Maria," 1996 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
