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IL01906001E
Instructional Literature
Page
6
Effective: May 2005
Arcflash Reduction Maintenance Switch
Application and Installation
3. Installing the Arcflash Reduction
Maintenance Switch in a DS Retrofitted
Breaker
Figure 4. Overview: Arcflash Reduction Maintenance Switch
Components Installed on a DS Breaker Trip Unit Mounting Frame.
Note:
The Arcflash Reduction Maintenance Switch can be installed on any
Retrofitted breaker using an Eaton “10” series Digitrip trip unit (510, 610,
810, and 910).
A. Following the instruction supplied with the original Retrofit kit,
remove the Rating Plug from the Trip Unit, then remove the
Trip Unit from Trip Unit Mounting Frame.
B. Following the instruction supplied with the original Retrofit kit,
remove the Trip Unit Mounting Frame from the breaker.
If the Arcflash Reduction Maintenance Switch is being installed on
a breaker that has been retrofitted with a DS Interface Board pur-
chased after 06/05 (P/N 500P147H01), proceed to Section 3. If
the breaker was retrofitted with a DS Interface Board purchased
before 06/05 (P/N 256P726H04), follow the procedures detailed
in Appendix A to install an updated DS Interface Board. See Fig-
ure 5 to help identify which DS Interface Board is installed in the
breaker.
Figure 5. Identifying the DS Interface Board.
Note:
If an updated DS Interface Board is needed and was not ordered with
the Arcflash Reduction Maintenance Switch kit, contact your Eaton Repre-
sentative to secure an updated DS Interface Board.
C. Align the holes in the Reduction Setting Module (RSM) with
the existing holes in the RSM mounting bracket. Secure the
RSM to the mounting bracket using the (2) .112-40 × 0.25"
thread cutting pan head screws supplied.
D. Remove the (2) lock nuts near the top of the back of the trip
unit mounting frame assembly that secure the top of the DS
Interface Board. Align the holes in the RSM assembly with
the circuit board screws. Secure the RSM assembly to the
trip unit mounting frame by installing the lock nuts.
Figure 6. RSM Assembly Installed on the Trip Unit Mounting
Frame.
E. Attach a wire tie mount to the back of the trip unit mounting
frame, as shown, using the existing hardware. Install a tie
wrap to secure the RSM harness. Route and connect the
RSM harness, as shown, to the P11 receptacle on the DS
Interface Board.
P11
CONNECTOR
UPDATED BOARD
P/N LOCATIONS
