On 11/26/2014 8:16 PM, [email protected] wrote: > Not when running multiple motors from a single VFD. I've read whitepapers > from VFD manufacturers showing sample configurations with something like > eight motors on a single large VFD, each with it's own OCP. I think the days > of loose motor connections blowing up a VFD are in the past and current > designs are more resilient anyway.
What they don't work with is magnetic contactors. Those need pure and smooth, full frequency power to kick in. While first trying out the VFD on the Monarch, I had to hold the contactor closed with a wooden paint stir stick until it got up to speed. Then it would work until stopping the motor. As it dropped below around 50Hz the contactor would open. So no more contactor in the circuit. The VFD is wired directly to the motor. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
