J. T. Eaton Liquid-Cooled Drives LCX9000 - Manual (Page 57)

LCX9000 Liquid-Cooled Drives User Manual
MN04005001E For more information visit: www.EatonElectrical.com 3-11
January 2007
Cable and Motor Insulation Checks
1. Motor cable insulation checks
Disconnect the motor cable from terminals U, V and W of the drive and from the motor.
Measure the insulation resistance of the motor cable between each phase conductor as
well as between each phase conductor and the protective ground conductor.
The insulation resistance must be at least 1 – 2MΩ.
2. Mains cable insulation checks
Disconnect the mains cable from terminals L1, L2 and L3 of the drive and from the
mains. Measure the insulation resistance of the mains cable between each phase
conductor as well as between each phase conductor and the protective ground
conductor.
The insulation resistance must be at least 1 – 2MΩ.
3. Motor insulation checks
Disconnect the motor cable from the motor and open the bridging connections in the
motor connection box. Measure the insulation resistance of each motor winding. The
measurement voltage must equal at least the motor nominal voltage but not exceed
1000V. The insulation resistance must be at least 1 – 2MΩ.