hi, i'm newly assigned to our plant's electrical engineering group. One of our motors (15HP, 18.5amps, 3P-440v 1140 RPM Y-connected)broke down and was contracted out for rewinding. upon delivery to our site, the motor current reading on y-connection was only about 2.3Amps/line. However, when the supplier engineer reconnected the motor into Delta, it's current reading was at 10.6A/line. Though, personnally, I don't want to accept the motor since they should have doen it according to original design, my boss wants me to prepare a technical memo stating the disadvantage and advantages of such connections.
Could anyone kindly help/enlighten me please to support our position against the supplier since they sent a memo guaranteeing the performance of the rewound motor. the application BTW is on Oven blower fan.
thanks a lot
/louie