GE Industrial Solutions ProTrip Conversion Kits AK-50, AKU-50, AKS-50, AKT-50, AK-75, and AK-100 - Manual (Page 11)

Removing the Existing Trip Devices
AK-50 & AKS-50 Breakers with EC or Power Sensor
Trip Systems
1. Remove and discard the two screws at the base of
each trip device, as shown in Figure 16. Discard the
metal mounting brackets.
2. Remove and discard the small Philips-head screw at
the top of each trip device.
3. Remove and discard the four 5 / 16 " Allen-head bolts
securing each trip coil. The coil can then be lifted off
and removed. Figure 17 shows one trip completely
removed, one with the cover removed, and one still
in place.
AK-50 & AKS-50 Breakers with SST Trip Systems
Remove the existing SST phase sensors in preparation
for installing the new sensors.
AK-75 & AK-100 Breakers with EC or Power Sensor
Trip Systems
Remove the existing trip devices and harnesses and
discard.
AK-75 & AK-100 Breakers with SST Trip Systems
The new ProTrip phase sensors are visually identical to
the SST sensors. Remove the existing sensors and
discard.
Figure 16. Existing EC trip devices before removal.
Figure 17. Removal of EC trip devices.
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