GE Removing the Existing Trip Devices, AK-50 & AKS-50 Breakers with SST Trip Systems

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. Dis- card 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 prepara- tion 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.

Coil Mounting

Bolts

Cover Screws

and Clamps

Figure 16. Existing EC trip devices before removal.

Figure 17. Removal of EC trip devices.

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