Rockwell Automation 1502 400 Amp Medium Voltage Contactor (Series D) - Manual (Page 34)

4-6 Maintenance
1502-UM050D-EN-P – June 2013
7. Close the contactor by using the TEST control circuit in the starter. Insert
a feeler gauge of 0.065 in. (1.65 mm) into the overtravel gap of a bottle
assembly (Figure 4.7). Rotate the insulator until the gap is correctly set.
Repeat this step for the two remaining bottles. This step must be
performed accurately because it establishes synchronization between the
three vacuum bottles.
Overtravel Gap
0.065 in. [1.65 mm]
Overtravel Gap
0.065 in. [1.65 mm]
Figure 4.7 – Establishing Overtravel
8. With the contactor still energized, measure dimension A1 for all three
bottles (Figure 4.8). De-energize (drop out) the contactor and measure
dimension A2 for all three bottles. The contact gap is the difference of A2
minus A1. Record the gap for all three bottles.
A1 A2 A1 A1 A2 A2
Figure 4.8 – Measuring Contact Gap
Vacuum Bottle Replacement
and Set-up Procedure (cont.)