52
Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
Chapter 5 Maintenance
Figure 39 - Contactor Voltage Checkpoints
7. Use the Door Interlock Circumvention procedure (refer to
Interlock Circumvention on page 48
) to move the isolation switch handle
to the ON position.
8. Check the isolation switch blades with a hot stick or appropriate voltage
measuring device to verify that they are voltage free (see
).
Figure 40 - Isolation Switch Voltage Check Points
9. Once all power circuits are verified to be voltage free, move the isolation
switch handle back to the OFF position. The unit is now safe to service.
Line Side
Load Side
Isolation Switch Blades must fully
engage Incoming Line Stabs
Check incoming line voltage here