GE Industrial Solutions ProTrip Conversion Kits K-225, K-600, K-800, K-1600 - Manual (Page 6)

4. Carefully drill out the four #10-32 screws on each
phase that hold the trip units to the housing, as
shown in Figure 3.
5. Remove and save the 3/8 -16 x 2" bolt, nut, and lock
washer holding the trip unit to the bus on each
phase, as shown in Figure 4. The trip units can be
removed and discarded. The breaker is now ready
for conversion.
I-T-E 1600 Ampere Breakers
On I-T-E 1600 ampere breakers, each electromechanical
trip unit is contained in its own housing.
1. On draw-out breakers with electrical operators,
remove the four screws holding the draw-out contact
block assembly to the back frame, as shown in
Figure 5. Lift off the contact block assembly. Save
the hardware for later reinstallation.
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2. Remove the two top and two bottom Philips-head
screws at the breaker rear holding each insulated trip
unit housing to the breaker frame, as shown in Figure
6. Save the hardware for later reinstallation.
NOTE: On some I-T-E breakers, the load-side draw-out
fingers must also be removed.
Figure 3. Drilling out the screws holding the trip units to
the housing, 225–800 A breakers.
Figure 4. Bolts to be removed from the load stabs, 225–
800 A breakers.
Figure 5. Removing the draw-out contact block on a K-
1600 breaker.