2–21

L2002 Inverter

Wire the Inverter Output to Motor

Step 7: The process of motor selection is beyond the scope of this manual. However, it

7 must be an AC induction motor with three phases. It should also come with a chassis ground lug. If the motor does not have three power input leads, stop the installation and verify the motor type. Other guidelines for wiring the motor include:

•Use an inverter-grade motor for maximum motor life (1600V insulation).

•For standard motors, use the AC reactor accessory if the wiring between the inverter and motor exceeds 10 meters in length.

Simply connect the motor to the terminals [U/T1], [V/T2], and [W/T3] as shown to the right. This is a good time to connect the chassis ground lug on the drive as well. The motor chassis ground must also connect to the same point. Use a star ground (single- point) arrangement, and never daisy-chain the grounds (point-to-point).

Use the same wire gauge on the motor and chassis ground wiring as you used on the power input wiring in the previous step. After completing the wiring:

•Check the mechanical integrity of each wire crimp and terminal connection.

•Replace the housing partition that covers access to the power connections.

•Replace the front housing cover. First, align the two hinging tabs. Then press the cover onto the inverter until the locking tabs click into place.

L200–004NFU2 Wiring Example

To Power

To Chassis

To Motor

Supply

Ground

 

Installation and

Mounting Inverter

 

 

Logic Control Wiring

After completing the initial installation and powerup test in this chapter, you may need to wire the logic signal connector for your application. For new inverter users/applications, we highly recommend that you first complete the powerup test in this chapter without adding any logic control wiring. Then you will be ready to set the required parameters for logic control as covered in Chapter 4, Operations and Monitoring.