Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet - Manual (Page 66)

5-18 Maintenance
1512A-UM102B-EN-P – June 2013
The auxiliary contacts are mounted on the left side of the isolation
switch, slightly below the cams on the isolation switch shaft.
Normally open contacts (Isolation Switch a Contacts - ISa) are on the
outside of the isolation switch housing, and normally closed contacts
(Isolation Switch b Contacts - ISb) are on the inside of the housing.
Figure 5.16 – Location of Isa and Isb Auxiliary Contacts
ISa and ISb contacts are exactly the same (700 CPM). The cam
controls the normally open or normally closed status of the contacts.
Refer to Figures 4.6 to 4.7 for wiring diagrams.
The Isolation Switch Ground Adjustment procedure
(page 5-16) must be completed before adjusting the
auxiliary contacts to ensure proper synchronization
of the assembly.
Auxiliary Contacts Inspection and
Replacement (cont.)
I M P O R T A N T I M P O R T A N T