Allen-Bradley 1512B, Руководство пользователя

Страница: 60 / 108

60 Rockwell Automation Publication 1500-UM055I-EN-P - December 2021
Chapter 4 Maintenance
11. If the contactor is being replaced with a new one, move the contactor
interlock lever to the new contactor.
12. To reinstall the contactor, reverse the procedure. Make sure the
mounting bolts (11 lb•ft [14.5 N•m]), power cable hardware (45 lb•ft
[61 N•m]), and bus bar hardware (45 lb•ft [61 N•m]) is properly torqued.
13. Adjust the contactor interlock rod according to the Contactor Interlock
Rod Adjustment procedure (refer to Contactor Interlock Rod Adjustment
on page 60 ).
Contactor Interlock Rod
Adjustment
1. Complete the Power Lock-out Procedure (refer to Power Lock-out
Procedure on page 53 ).
2. Open the medium voltage door. Use the Door Interlock Circumvention
procedure (refer to Door Interlock Circumvention on page 52 ) to move
the isolation switch handle halfway between the OFF and ON position
(see
Figure 55 ). 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 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 53 ) 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.