Rockwell Automation 1502 Medium Voltage Contactor, 800A (Series D and E) - Manual (Page 36)

Maintenance 4-7
1502-UM051E-EN-P – June 2013
9. Position the middle vacuum bottle assembly (phase B) in the contactor. En-
sure that the rocker washer is below the actuator plate and that the wear in-
dicator line is facing towards the front. Install and torque the load terminal
retaining bolt and the vacuum bottle mounting bolt to 20 ft•lb (27 N•m).
10. With the armature plate held tightly against the 3/16” rod, turn the insula-
tor as required such that the bottom of the overtravel spring touches the
surface of the actuator plate inside the counter bore. The spring must be
held securely in place, slightly compressed (as shown in Figure 4.8). Tighten
the load terminal nut.
Rocker Washer
Load Terminal Nut
Actuator Plate
Overtravel Spring touches
surface of counterbore
Figure 4.8 – Insulator/Actuator Plate Set-up
11. With the armature plate still held tightly against the rod, turn the gap
adjustment nut until the rocker washer makes contact with the round rocker
bar as shown in Figure 4.9. Install the lockwasher and gap locking nut and
tighten the two nuts against each other making sure that the top gap adjust-
ment nut does not turn.
Note: Ensure that the overtravel spring is held securely in place with no play.
Should there be play in the positioning of the spring, loosen the load termi-
nal nut and repeat Steps 10 and 11.