Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 51)

Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013 43
Maintenance Chapter 5
Figure 42 - Inspecting Isolation Switch in Open Position
6. Check the line and load sides of the contactor with a hot stick or
appropriate voltage measuring device to verify that they are voltage free
(see
Figure 43 ).
a. Check for line-side voltage at the top vacuum bottle terminals.
b. Check for load-side voltage at the bottom vacuum bottle terminals.
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