Phase Sensors-Ak/Aks-50; Phase Sensors-Akr-75/100 - GE MicroVersaTrip AKSU-50 Installation Manual

SECTION 3 (CONT'D)-Back Frame Conversion

3 .3-Phase Sensors-AK/AKS-50

For EC and Power Sensor equipped breakers:
1. Remove the existing trip devices and harnesses.
2. Install the lower adaptor connector, as shown in
Fig. 3 -3.
3. Install MicroVersaTrip™ phase sensor. Secure sensor
to lower adaptor with RTV or equivalent adhesive. Install
upper adaptor connector. See Fig. 3-4.
For SST equipped breakers.
1. Replace the existing SST phase sensor with the new
MicroVersaTriprM sensor.
2. Install as shown in Fig. 3-4.
Fig. 3-3. Lower adapter connector
Fig. 3-4. MicroVersaTrip™ phase sensors and
harness installed- AK/AKS-50
10
3.4-Phase Sensors-AKR-75/1 00
For SST and ECS equipped breakers:
1. Remove the back frame harness from the sensor
terminal boards.
2. Remove the primary finger disconnect assemblies
from AKD-6 or Substructure breakers (Z long bolts).
3. Remove the locking ring and slide off the phase
sensor.
4. Remove the sensor terminal.
5. Install the MicroVersaTriprM phase sensors as shown
in Fig. 3-5. Engage the sensor's anti-turn lugs with the
notches in the locking ring.
6. Install the new sensor terminal board. See Fig. 3 -5.
Fig. 3-5. MicroVersaTrip™ phase sensors
installed