David Brandt wrote: > The final obstacle is the precharge circuit, so I guess this is mainly > addressed to Lee, since I basically copied his. I've wired it as you > stated, Lee, and it precharges fine, but the second contactor does not > pull in as it should. I've checked just about everything, and it all > seems to be working fine. What else should I check? > > Connections: coil to B+ and B-, NO to 12V + and ground, through the > contactor coil. Total resistance through the coil with the resistors > in series measures approximately 15k ohms. 120V AC relay, 114V > battery pack.
First, what do you have for a precharge resistor? I used a light bulb, but a physical resistor will of course work, too. Second, what voltage do you see across the controller's B+ and B- terminals? When the first contactor is closed, this voltage should rise as the controller's capacitors charge thru the precharge resistor. Third, have you checked to see what DC voltage or current will pull in your AC relay? Perhaps the resistor you have in series with the coil is too large, so the coil current doesn't rise high enough to pull it in. -- Lee A. Hart Ring the bells that still can ring 814 8th Ave. N. Forget your perfect offering Sartell, MN 56377 USA There is a crack in everything leeahart_at_earthlink.net That's how the light gets in - Leonard Cohen
