how do you meg out a motor. 75 hp triping out overloads and about every 6th or 7th time takes out 125 a. fuse.
it is all ways b phase fuse

motor has been runing for 4 or 5 years so overloads and fuse are rated fine.
motor turns hydrolic pump for demount mach.
480 v tap 9 lead
went ground to L1 L2 L3 open
any configuration of L1 L2 L3 to each other dead short

any ideas could use some help

Larry

Last edited by allphase; 05/09/11 11:25 AM.