On 6/1/2012 6:52 PM, gene heskett wrote: > On Friday, June 01, 2012 06:50:05 PM John Thornton did opine: > > >> I posted on the C(ommerical)NCZone and a guy there says those drives are >> rated for a 3% inductance wye isolation transformer. >> >> John >> >> > BS alert there John. 3% of what? Without a frame of reference you may as > well be shopping for a good used car. > > Cheers, Gene >
Gene, It is simply power system lingo.. here is an explanation that I believe is correct. http://www.control.com/thread/1026248874 The higher the %, the more voltage drop through the transformer/reactor. So what John was saying is that the 611 system can use up to a 3% reactor, but no more. Meaning the 611 expects a very stiff power supply, which really does not surprise me as it is a rather high performance drive system. Most of the machines equipped with 611s that I have seen are serious industrial machines where there is a 1000 amp 480 volt bus duct 50 feet from the machine, etc. Dave ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
