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SECTION 4. BACK FRAME
CONVERSION
The back frame conversion consists of the following
operations:
1. Modification of the crossbar assembly for the
flux shifter installation.
2. Removal of the existing trip devices.
3. Installation of the phase sensors.
4. Installation of the back frame harness.
Crossbar Modification
The flux shifter reset linkage is driven by the actuator
bracket, as shown in Figure 3. The actuator bracket
must be assembled to the left side link of the left
pole, as shown in Figure 14.
If the actuator bracket mounting holes are not in the
left side link, the holes must be added. Drill and tap
two 5/16-18 holes using the pattern in Figure 15. A
full-size template is provided in the Appendix.
Figure 14. Actuator bracket attached to the left pole link.
Figure 15. Drill pattern for actuator bracket mounting holes.
Left Pole
Link
Actuator
Bracket