Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 56)

48 Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
Chapter 5 Maintenance
e. Electrically operate the contactor by pushing the START button on the
unit or at a remote location.
f. Disengage the contactor and move the control switch to the OFF
position. Disconnect the external power supply.
g. Complete the Power Lock-out procedure
4. Open the medium voltage door.
5. Visually inspect that the isolation switch blades fully engage the grounding
pins on the grounding bar. The isolation switch shutters should be closed
(see
Figure 47 ).
Figure 47 - Inspecting Isolation Switch in Open Position
See Detail A
Grounding Bar
Isolation Switch Blades
must fully engage
Grounding Pins of
Grounding bar
(Verify for each phase)
Isolation Switch Shutters
must be closed
(Verify for each phase)
Detail A Grounding Pins
Isolation Switch
Blades in open
position
Viewed from back with components
removed for clarification