Rockwell Automation 1502 Medium Voltage 400A Contactor - Series E - Manual (Page 39)

Rockwell Automation Publication 1502-UM052H-EN-P - June 2013 39
Maintenance Chapter 4
Figure 27 - 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 28 . Repeat this for the two remaining bottles. The load
terminals, insulators and overtravel spring assemblies remain in the
contactor as shown in
Figure 28 .
Figure 28 - Removal of Vacuum Bottles
5. Install a new bottle by tilting an insulator forward and threading the bottle
onto the stud (reverse of Step 3). Take care to ensure the threads are
aligned as cross-threading can occur. Thread the bottle down, leaving a gap
of approximately 4.82 mm ± 0.25 mm (0.190 in. ± 0.01 in.) between the
top of the bottle and the bottom surface of the line terminal, as show in
Figure 29 . Use inside calipers and micrometer, or another accurate
measuring tool, to set the gap. This gap is precisely calibrated later in this
section. The wear indicator line on the bottom of the bottle’s movable
shaft must be facing forward (i.e. visible from the front of the contactor).
Repeat this step for the remaining two bottles.
Vacuum Bottle
Mounting Bolt
Load Terminal
Retaining Bolt
and Hardware
Insulator Stud
Load Terminal Nut