GE Industrial Solutions ProTrip Conversion Kits AK-50, AKU-50, AKS-50, AKT-50, AK-75, and AK-100 - Manual (Page 12)

Installing the Phase Sensors
AK-50 & AKS-50 Breakers
Figure 18 shows the parts provided for assembly of the
CT on each pole.
1. Mount the new copper CT post to the back frame
with the two 3 / 8 -16 x 1 1 / 2 " bolts, flat washers, and
lock washers provided, as shown in Figure 19.
2. Fasten the three small insulated wire fasteners to the
back frame with the 1 / 4 -20 x 1 3 / 4 " screws provided,
as shown in Figure 20. One fastener is mounted
under each CT.
3. Place a CT over each copper post, first applying a
small amount of RTV or similar adhesive to prevent
the CTs from rotating.
4. Mount the top copper bus over each CT and secure
with the 1 / 2 -13 x 1 1 / 2 " Allen-head bolts, lock washers,
and flat washers provided.
5. Insert two 3 / 8 -16 x 1 1 / 2 " bolts, lock washers, and flat
washers through each top copper bus into the
contact arm assembly.
6. Tighten the 3 / 8 -16 bolts to 200 in-lb and the 1 / 2 -13
bolts to 300 in-lb.
WARNING: Step 6 ensures critical electrical integrity
connections. The designated bolts must be correctly
tightened for proper operation. Failure to tighten these
bolts properly will cause a breaker failure, resulting in
property damage and/or personal injury.
Figure 18. Parts provided for CT installation for one pole.
Figure 19. CT post mounted in the breaker back frame.
Figure 20. CT installation completed..
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