Rockwell Automation 1102C-VB2 User Manual
Bulletin 1102C 200A Vacuum Contactor
Vacuum Interrupter Phase Assembly
Replacement Instructions
(Cat 1102C-VB2)
ATTENTION: To prevent electrical shock, disconnect from power source before installing or servicing.
Vacuum Interrupter Phase Assembly Replacement
1. Disconnect all power cables (or bus work) and all control wiring to the contactor.
2. Remove the contactor from its mounted location. The contactor is best serviced in the tabletop position.
3. Disconnect the coil wire leads from the Control-Pak (Figure 2B).
4. Remove the cover attachment hardware from the contactor and remove the cover (Figure 1).
V
A
V
A
CU
U
M
C
ON
T
A
C
T
OR
Note Location
of Retainer
Cover Cover
C
U
UM
C
O
NT
A
C
T
OR
Note Location
of Retainer
Auxiliary
Remove
Coil Wire
Leads
from
Control-Pak
Disconnect Coil Wires
Control-Pak
from Auxiliary
AC Coil (with Control-Pak) DC Coil (with Auxiliary 1195C-N5)
Figure 1
5. Remove the Control-Pak from the contactor by first rotating the retainer to release the top of the Control-Pak. Then
pull out the top of the Control-Pak (the tab must clear the notch) and then push Control-Pak slightly downward to
release lower tab that holds the Control-Pak to the housing (Figures 2A & 2B).
Coil Leads
Figure 2A Figure 2B
Vacuum Interrupter Phase Assembly Replacement (Cont'd)
6. Locate the replacement Interrupter Phase Assembly that needs to be replaced. It is recommended that all three
interrupters be replaced at the same time.
7. Remove the hardware that secures the shunt to the terminal (Figure 3).
8. First remove the hardware securing the Cam Cover, then remove the hardware securing the Interrupter Phase
Assembly. Note the position of the shunt prior to removing the Interrupter Phase Assembly. Carefully remove the
Interrupter Phase Assembly (Figure 4).
9. Place the new Interrupter Phase Assembly into the upper housing. Ensure that the Cams are properly seated around
the Contact Operator. Thread the Shunt through the housing and Contact Operator, following the Shunt path (Figure 5).
Replace the hardware securing the Interrupter Phase Assembly (Figure 4). Torque screws to 80 lb-inches.
10. Attach the Shunt to the Load Terminal by placing the Shunt against the Terminal with the flat washer and lock washer
between the Shunt and the head of the bolt (Figure 3). Torque to 60 lb-inches).
11. Replace the Cam Cover and hardware (torque to 12 lb-inches).
Interrupter
Phase Assembly
Lockwasher
Washer
Shunt
Shunt
Cam
Cover
Contact
Operator
Shunt Path
Bottom View of Upper
Housing Assembly
Cam
Orientation
Figure 3 Figure 4 Figure 5
12. Reinstall the Control-Pak (Figures 6A & 6B). First, insert the lower tab into the recess on the side of the contactor
base. With proper installation, the Actuator will fit into the hole in the slot in the side of the contactor housing. Using a thin
rod or flat blade, lift the Actuator up as necessary to insert it into the slot mentioned.
Thin rod or flat blade Thin rod or flat blade
Actuator
must fit into slot
shown
Control-Pak
Actuator
Figure 6A Figure 6B
13. Reinstall the cover and secure it with the original mounting hardware. NOTE: Cover must fit under metal bracket on
Control-Pak. Tighten the two screws to 12 lb-inches (Figure 1).
14. Reattach the coil wire leads and any auxiliary control wires to the Control-Pak (tighten to 7 lb-inches).
15. Reinstall the contactor.
16. Reconnect the line and load conductors and tighten the main terminal hardware and bolts to 125 - 145 lb-inches.
42052-093-01 (1)
Printed in U.S.A.
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