Eaton SPI9000 User Manual download pdf (Page 30)

Power Wiring

20 9000X AF Drives MN04001004E—May 2011 www.eaton.com

Checking the Cable and Motor Insulation

1. Check the motor cable insulation as follows:

Disconnect the motor cable from terminals U, V, and W

of the SVX9000/SPX9000 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 >1M ohms.

2. Check the input power cable insulation as follows:

Disconnect the input power cable from terminals L1,

L2, and L3 of the SVX9000/SPX9000 and from the

utility line feeder.

Measure the insulation resistance of the input power

cable between each phase conductor as well as

between each phase conductor and the protective

ground conductor.

The insulation resistance must be >1M ohms.

3. Check the motor insulation as follows:

Disconnect the motor cable from the motor and open

any 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 >1M ohms.

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Eaton SPI9000 User Manual Page 30