GE Industrial Solutions ProTrip Conversion Kits AK-15, AK-25, and AKU-25 - Manual (Page 14)

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8. Remove the bushing from the right operating link and
replace it with the new flux shifter actuating bushing,
as illustrated in Figure 23. On pre-1969 breakers, the
hole in the link must be enlarged to
7 / 16 -inch
diameter.
9. Reassemble the front and back frames, using the
reverse of the procedure described in Section 3,
Separation of the Front and Back Frames. Be sure to
engage the flux shifter actuator bushing on the right
operating link with the flux shifter operating lever, as
illustrated in Figure 10.
10. Bring the three CT wires back from the trip unit to the
back frame and connect to the CT terminal boards,
as shown in Figure 22. The lengths of the wires as
supplied assure connection to the proper terminal
board. Note that the black wire (tap) connects to the
left terminal and the white wire (common) to the right
terminal.
Figure 23. Right-side view of the back frame, showing
installation of the flux shifter actuator bushing.