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Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control User Manual

Page 41

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Rockwell Automation Publication 7000-UM202B-EN-P - June 2014

41

Component Definition and Maintenance

Chapter 3

Replacing the Surge Arrester

1.

Isolate and lock out all power to the drive.

2.

Wait a minimum of ten minutes for the drive to discharge stored energy.

3.

Observe the location of the connecting leads.

4.

Use proper method to ensure the leads are at ground potential. Use
temporary grounding when necessary.

5.

Detach the connecting leads.

6.

Loosen the bolt that attaches the surge arrester to the ground bus. Remove
the arrester. Remove temporary ground when applicable.

7.

Replace the surge arrester with an equivalent one (make sure that the
voltage rating is the same).

8.

Connect the leads to the surge arrester.

9.

Torque the surge arrester hardware to 28 N•m (21 lb•ft).

Figure 30 - Surge Arresters (heat sink model)

ATTENTION: To prevent electrical shock, disconnect the main power before
working on the drive. Verify that all circuits are voltage-free using a hot stick or
appropriate voltage-measuring device. Failure to do so may result in injury or
death.

Surge Arresters