Rockwell Automation 1502 400 Amp Medium Voltage Contactor (Series D) - Manual (Page 32)

4-4 Maintenance
1502-UM050D-EN-P – June 2013
Vacuum Bottle Replacement
Under normal conditions, vacuum bottles will last up to 1,000,000 operations;
and Set-Up Procedure
however, all three bottles must be replaced if any wear indicator line reaches
the bearing (regardless of the number of operations).
Use the following procedure to remove and replace the vacuum bottles. This
procedure can be performed with the contactor remaining in the power cell of
the controller. Refer to Chapter 6 for the part number(s) required for this
procedure.
To avoid shock hazards, lock out incoming power and
disconnect the control plug from the contactor before
working on the unit. Verify with a hot stick or meter that all
circuits are voltage free. Failure to do so may result in severe
burns, injury or death.
1. Before removing the vacuum bottles, mark the installed bottles clearly to
avoid confusing them with the replacement vacuum bottles.
2. If the contactor has not been removed from the starter, first remove the
lower terminal connections at the rear of the contactor.
3. Remove the load terminal retaining bolt at the rear of the contactor, and the
vacuum bottle mounting bolt at the top of the contactor (Figure 4.4).
Vacuum Bottle
Mounting Bolt
Load Terminal
Retaining Bolt
and Nut
Vacuum Bottle
Mounting Bolt
Load Terminal
Retaining Bolt
and Nut
Figure 4.4 – Mounting and Retaining Bolt Removal
4. Loosen the load terminal nut on one bottle assembly, tilt the bottle forward
(out of the contactor) and unscrew it from the insulator stud as shown in
Figure 4.5. Repeat this for the two remaining bottles. The load terminals,
insulators and overtravel spring assemblies remain in the contactor as
shown in Figure 4.5.
A T T E N T I O N A T T E N T I O N