GE AK-50 installation instructions Breakers with a Side Bracket, AKU-50 Breakers Only

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Breakers with a Side Bracket

1.Drill a 3￿4” diameter hole into the flux shifter assembly mounting base to provide the neces- sary clearance for the bracket. The location of the new hole is shown in Figure 6.

2.Remove the side bracket from the frame and drill the holes according to the pattern in Figure 4. A full-size template is provided in the Appendix. After the holes are drilled, return the side bracket to its original location.

3.Mount the new flux shifter to the inside of the side frame with the three screws, lock washers, flat washers, and nuts supplied, as shown in Figure 5. The upper two screws are inserted from the outside of the frame, while the lower screw must be inserted from the inside.

AKU-50 Breakers Only

For easier installation of the new flux shifter assembly on AKU-50 breakers, the open-fuse lockout (OFLO) may be removed from the breaker.

1.Remove the three bolts attaching the OFLO to the base of the breaker.

2.The OFLO terminal block must be relocated on the upper left side of the breaker. Some parts and tool, not provided with the kit, are necessary for this task:

Six strips of 14 AWG wire

Wire splice

12 butt splices

Wire labels

Drill and size F bit

5/16-18 tap

Flathead screw driver

Two 5/16-18 bolts and lock washers

3.Drill and tap two holes for the 5/16-18 bolts. Fig- ure 7 shows the hole locations.

4.Remove the three bolts securing the OFLO to the breaker and lift off the OFLO device.

5.Remove the wires that connect the OFLO device to the terminal block.

6.Cut the wires that connect to the coils where they join and label the wires. Attach butt splices to all twelve open ends.

7.Connect the strands of wire to the OFLO. Mount the terminal block in its new location. DO NOT complete the wire connections until the flux shifter is installed.

8.Install the new flux shifter assembly as described above and shown in Figure 5.

9.Connect the cables attached to the terminal block and tie them together.

Figure 6. Location of new hole in the flux shifter base.

Figure 7. Locations of new holes for mounting the OFLO terminal

block.

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Contents Introduction Table of Contents List of Figures General Information Before InstallationRelocating and Remounting the W and X Relays Front Frame Breaker ConversionBreakers with EC or Power Sensor Trip Systems Installing the Flux Shifter AssemblyAKU-50 Breakers Only Breakers with a Side BracketAdjusting the Flux Shifter Installing the Trip PaddleBreakers with ECS or SST Trip Systems EC or Power Sensor Trip System Installing the Trip Unit Mounting BracketECS or SST Trip System Trip unit mounting bracket attached to the mounting Plate Crossbar Modification Back Frame ConversionAK-50 & AKS-50 Breakers with SST Trip Systems Removing the Existing Trip DevicesAK-75 & AK-100 Breakers with SST Trip Systems AK-50 & AKS-50 Breakers Installing the Phase SensorsAK-75 & AK-100 Breakers Phase sensor installation on AK-75 & AK-100 breakersConfiguring the Trip Unit Installing the Trip UnitInstalling the Fourth-Wire Disconnect FOUR-WIRE Ground Fault OptionAK-50 & AKS-50 Stationary Breakers AK-75 & AK-100 Draw-Out Breakers AK-50 & AKS-50 Draw-Out BreakersAK-75 & AK-100 back frame conversion Outline of the neutral sensor for AK-50 breakers Installing the Neutral SensorOutline of the neutral sensor for AK-75 and AK-100 breakers Equipment Conversion Installing Mounting BracketsFourth-wire disconnect for AKD-5 & AKD-6 Nuisance Tripping on Ground Fault-Equipped Breakers Testing and TROUBLE- ShootingTesting Trouble-ShootingAK-50 Page Page Appendix 1. Drill Template for Flux Shifter Mounting Appendix Drill TemplatesPage Page Page Page GE Industrial Systems