Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 59)

Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013 51
Maintenance Chapter 5
6. With the feeler gauge positioned in the gap, move the interlock lever and
the stop bracket closer to the isolation switch operating lever to reduce the
gap space. Tighten the stop bracket screws.
7. Tighten the nylock nut until it is snug against the contactor operating
lever. Do not overtighten the nylock nut as it will move the operating lever
and reduce the gap. Proceed to step 11.
To Increase the Gap Distance
8. Loosen the two screws in the stop bracket and move the stop bracket away
from the interlock lever.
9. Loosen the nyloc nut until the gap reaches the desired size.
10. Move the stop bracket until it just touches the interlock lever and tighten
the screws.
11. Apply Loctite 290 (or equivalent adhesive) to the stop bracket screws and
torque the screws to 8 N•m (6 lb•ft).
12. Move the isolation switch handle to the ON position.
13. Manually close the contactor by attaching locking pliers to the contactor
operating lever and pushing down until the armature plate contacts the
magnetic cores (see
Figure 50 ). Verify that the interlock lever overlaps the
isolation switch operating lever by at least 3 mm (0.125 in.) (see Figure 51 ).
Figure 50 - Closing Contactor Manually (Some parts not shown)
Contactor
Interlock Rod
Contactor Plug
Contactor
Mounting Bolts
Contactor
Operating Lever