GE Industrial Solutions ProTrip Conversion Kits AK-50, AKU-50, AKS-50, AKT-50, AK-75, and AK-100 - Manual (Page 8)

Breakers with ECS or SST Trip Systems
1. Remove the ECS or SST trip unit.
2. Remove the existing flux shifter device and the trip
unit control harness.
3. Install the new flux shifter assembly as described
above and shown in Figure 5.
Installing the Trip Paddle
For breakers equipped with an ECS or SST trip system,
the existing trip paddle is used with the new flux shifter.
For all other breakers, the existing trip paddles must be
removed and the new trip paddle installed as follows:
1. Remove and discard the three trip paddles on the trip
actuator bar, as shown in Figure 8.
2. Assemble the trip paddle and the threaded back
plate by inserting two of the 10-32 x 3 / 4 " screws and
lock washers provided along the top edge.
3. Slip the trip paddle over the trip actuator bar
approximately one inch from the side frame, as
shown in Figure 9. Insert the remaining 10-32 x
3 / 4 "
screw and tighten the other screws to secure the trip
paddle in place.
Adjusting the Flux Shifter
After the flux shifter and trip paddle are installed and the
breaker frames are reassembled, the following
adjustments must be made.
1. With the breaker OPEN and the mechanism charged,
set the gap between the trip paddle and the end of
the flux shifter rod at 0.10 inch, as shown in Figure
10. Use a 0.10-inch diameter rod. Set the adjuster
end of the trip rod and lock it in place with the jam
nut. Note that removal of the buffer stud will make
the trip paddle easier to install and adjust.
2. As the crossbar travels between the breaker
CLOSED and OPEN positions, the tang of the
actuator bracket must clear the buffer stud. If there is
insufficient clearance, loosen the two mounting
screws and rotate the bracket clockwise to take up
mounting hole slack. Retighten the screws.
3. Optional Test – The flux shifter may be tested by
closing the breaker and applying a 9 Vdc power
source to the flux shifter leads (the red wire is posi-
tive). The breaker should trip.
Figure 8. Existing trip paddles to be removed.
Figure 9. Installing the new trip paddle.
Figure 10. Adjusting the flux shifter.
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