2.5.2 Replacement of communications boards 3742.5.3 Replacement of the input module 3752.5.4 Replacement of the power supply board 3762.5.5 Replacement of the I/O boards 3762.6 Recalibration 3762.7 Changing the battery 3772.7.1 Post Modification Tests 3772.7.2 Battery Disposal 3772.8 Cleaning 3773 Troubleshooting 3783.1 Self-Diagnostic Software 3783.2 Power-up Errors 3783.3 Error Message or Code on Power-up 3783.4 Out of Service LED on at power-up 3793.5 Error Code during Operation 3803.5.1 Backup Battery 3803.6 Mal-operation during testing 3803.6.1 Failure of Output Contacts 3803.6.2 Failure of Opto-inputs 3803.6.3 Incorrect Analogue Signals 3813.7 PSL Editor Troubleshooting 3813.7.1 Diagram Reconstruction 3813.7.2 PSL Version Check 3814 Repair and Modification Procedure 382Chapter 16 Technical Specifications 3831 Chapter Overview 3852 Interfaces 3862.1 Front Serial Port 3862.2 Download/Monitor Port 3862.3 Rear Serial Port 1 3862.4 Fibre Rear Serial Port 1 3862.5 Rear Serial Port 2 3872.6 Redundant Ethernet Ports 3872.7 IRIG-B (Demodulated) 3872.8 IRIG-B (Modulated) 3872.9 Rear Ethernet Port Copper 3882.10 Rear Ethernet Port Fibre 3882.10.1 100 Base FX Receiver Characteristics 3882.10.2 100 Base FX Transmitter Characteristics 3893 Busbar Protection Functions 3903.1 Busbar Circuitry Fault Protection 3903.2 Busbar Circuitry Fault Protection 3903.3 Busbar Dead Zone Protection 3903.4 Three-phase Overcurrent Protection 3903.5 Earth Fault Protection 3913.6 Transient Overreach and Overshoot 3914 Performance of Monitoring and Control Functions 3924.1 Voltage Transformer Supervision 3924.2 PSL Timers 3925 Measurements and Recording 3935.1 General 3935.2 Disturbance Records 3935.3 Event, Fault and Maintenance Records 3935.4 Fault Locator 3936 Standards Compliance 394MiCOM P747 ContentsP747-TM-EN-1 xi
