Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet User 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