GE AK-50 FOUR-WIRE Ground Fault Option, Installing the Fourth-Wire Disconnect

Page 16

SECTION 6 FOUR-WIRE GROUND

FAULT OPTION

The ground fault option for four-wire installations requires the installation of an additional current sensor on the neutral bus in the equipment. The sensor is connected to the trip unit through the connector provided in the wiring harness.

Installing the Fourth-Wire Disconnect

AK-50 & AKS-50 Stationary Breakers

The fourth-wire disconnect for stationary breakers consists of a terminal board mounted to the lower front channel, as shown in Figure 24.

If the terminal board is already present on the breaker, just replace the control harness. Main- tain the following color code: white wire to common, black wire to the tap.

If the terminal board must be added, mount it as shown in Figure 24. The mounting holes may have to be added to the front channel.

Figure 24. Fourth-wire terminal board installation on AK-50 &

AKS-50 stationary breakers.

16

Image 16
Contents Introduction Table of Contents List of Figures Before Installation General InformationFront Frame Breaker Conversion Relocating and Remounting the W and X RelaysInstalling the Flux Shifter Assembly Breakers with EC or Power Sensor Trip SystemsBreakers with a Side Bracket AKU-50 Breakers OnlyAdjusting 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 Back Frame Conversion Crossbar ModificationAK-50 & AKS-50 Breakers with SST Trip Systems Removing the Existing Trip DevicesAK-75 & AK-100 Breakers with SST Trip Systems Installing the Phase Sensors AK-50 & AKS-50 BreakersPhase sensor installation on AK-75 & AK-100 breakers AK-75 & AK-100 BreakersInstalling the Trip Unit Configuring the Trip UnitInstalling the Fourth-Wire Disconnect FOUR-WIRE Ground Fault OptionAK-50 & AKS-50 Stationary Breakers AK-50 & AKS-50 Draw-Out Breakers AK-75 & AK-100 Draw-Out BreakersAK-75 & AK-100 back frame conversion Installing the Neutral Sensor Outline of the neutral sensor for AK-50 breakersOutline of the neutral sensor for AK-75 and AK-100 breakers Installing Mounting Brackets Equipment ConversionFourth-wire disconnect for AKD-5 & AKD-6 Testing and TROUBLE- Shooting TestingTrouble-Shooting Nuisance Tripping on Ground Fault-Equipped BreakersAK-50 Page Page Appendix Drill Templates Appendix 1. Drill Template for Flux Shifter MountingPage Page Page Page GE Industrial Systems