Eaton NRX Series Instruction Leaflet page 5

Series NRX breaker PXR trip unit
field installation instructions
7 . Place the new trip unit into the slot while pushing on the trip
unit interlock (RF breaker) or the wire form interlock (NF breaker).
Make sure the screws are lined up with the proper holes and the
new trip unit snaps firmly into place.
8. Tighten the screw clockwise to secure trip unit in place.
9. Connect the wire harness to the new trip unit.
IF THE WORK BEING PERFORMED IS A DIRECT REPLACEMENT, THEN
THE EXISTING HARNESS WILL WORK. IF YOU ARE GOING FROM A
NON-MODBUS OPTION TO A MODBUS OPTION, THEN CHANGE THE
HARNESS. REFER TO THE PROCEDURE IN SECTION 3, STEP 8.
10. Place the cover back on the breaker. Secure and tighten the four
front cover screws. The replacement of a PXR 20 trip unit to a
new PXR 20 trip unit is complete.
Add the appropriate modification label as indicated in Appendix A
to the front cover to indicate the changes made to the breaker.
Instruction Leaflet IL019238EN
Effective July 2019
NOTICE
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