Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 62)

54 Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
Chapter 5 Maintenance
9. Slide the contactor forward slightly to disengage the retaining tabs at the
rear of the contactor from the mounting bracket inside the cabinet.
10. Carefully remove the contactor from the cabinet.
11. If the contactor is being replaced with a new one, move the contactor
interlock lever to the new contactor.
12. Reverse the procedure to reinstall the contactor. Ensure the mounting
bolts, power cable hardware and bus bar hardware is properly torqued
(refer to
Recommended Torque Values on page 3 of Chapter 1 ).
13. Adjust the contactor interlock rod according to the Contactor Interlock
Rod Adjustment procedure (refer to Contactor Interlock Rod Adjustment
on page 54 ).
Contactor Interlock Rod
Adjustment
1. Complete the Power Lock-out Procedure (refer to Power Lock-out
Procedure on page 47 ).
2. Open the medium voltage door. Use the Door Interlock Circumvention
procedure (refer to Door Interlock Circumvention on page 46 ) to move
the isolation switch handle halfway between the OFF and ON position
(see
Figure 54 ). Keep the handle in this position until the adjustment
procedure is completed.
3. With the contactor in the OFF position, insert a 1.5 mm (0.060 in.) feeler
gauge in the gap between the interlock lever and the isolation switch
operating lever. The gap must be between 1.0 mm to 2.0 mm (0.039 in. to
0.078 in.).
4. To reduce the gap distance, follow steps 5-7.
To increase the gap distance follow steps 8-10.
ATTENTION: The contactor weighs approximately 22 kg (50 lbs) and assistance
may be required to safely remove it from the cabinet and transport it. Failure to
use caution when moving the contactor may result in equipment damage
and/or personal injury.
ATTENTION: The retaining screw is critical to the mechanical integrity of the
isolation switch. It is very important to ensure this screw is replaced during
reassembly.
ATTENTION: To avoid shock hazards, lock out incoming power (refer to Power
Lock-out Procedure on page 47 ) before working on the equipment. Verify with a
hot stick or appropriate voltage measuring device that all circuits are voltage
free. Failure to do so may result in severe burns, injury or death.