On Wed, Feb 13, 2013 at 9:06 PM, Stephen Dubovsky <[email protected]> wrote: > Contactors do not 'bounce' on open. Esp w/ inductive loads;)
OK, so you actually work in power electronics and I am just a dilletante but my understanding is that when the current flows while the contact starts to open, the L dI/dt causes huge V, which tends to arc and makes it hard to disconnect cleanly I understand that contactors are designed to switch quickly and cleanly but 'especially with inductive loads' is really hard to do it---that's why the HVDC breaker I described recently is so complicated and was apparently only made commercially last year. Are you saying that while standard drum switches are bad news, contactors are so beefy that it's OK to put them between motors and AC drivers? ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
