Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 76)

68 Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
Chapter 5 Maintenance
If it is possible to move the isolation switch handle to the OFF position for
reassembly, follow steps 5-10.
If it is not possible to move the isolation switch handle to the OFF
position for reassembly, follow steps 11-13.
Installing Z-clip with Isolation Switch Handle in the OFF Position
5. Reattach the Z-clip using the self-tapping screws, but do not completely
tighten them.
6. Move the isolation switch handle to the OFF position.
7. Swing the door closed and inspect the position of the Z-clip with respect
to the handle pin.
8. Set the Z-clip so that it is just above the handle pin. Do not set the Z-clip
more than 3 mm (0.125 in.) above the pin. Open the door and tighten the
screws.
9. Close the door and move the handle to the ON position. Verify that the
handle pin overlaps the Z-clip and prevents the door from opening.
10. Move the handle to the OFF position and tighten the door locking bolts.
Installing Z-clip with Isolation Switch Handle in the ON Position
11. Close the door and tighten the door locking bolts.
12. Position the Z-clip as shown in Figure 68 . Ensure the handle pin overlaps
the top portion of the Z-clip.
13. Use the self-tapping screws to reattach the Z-clip.
14. Complete steps 5-10 at the earliest opportunity to confirm that the Z-clip
assembly is correctly installed.
ATTENTION: The Z-clip assembly must be reassembled to ensure the
interlocking mechanism functions properly. Failure to do so will let
personnel access live medium voltage parts and may cause severe
burns, injury or death.