2.5.5 Replacement of the I/O boards 522
2.6 Recalibration 522
2.7 Changing the battery 522
2.7.1 Post Modification Tests 523
2.7.2 Battery Disposal 523
2.8 Cleaning 523
3 Troubleshooting 524
3.1 Self-Diagnostic Software 524
3.2 Power-up Errors 524
3.3 Error Message or Code on Power-up 524
3.4 Out of Service LED on at power-up 525
3.5 Error Code during Operation 526
3.5.1 Backup Battery 526
3.6 Mal-operation during testing 526
3.6.1 Failure of Output Contacts 526
3.6.2 Failure of Opto-inputs 526
3.6.3 Incorrect Analogue Signals 527
3.7 PSL Editor Troubleshooting 527
3.7.1 Diagram Reconstruction 527
3.7.2 PSL Version Check 527
4 Repair and Modification Procedure 528
Chapter 23 Technical Specifications 529
1 Chapter Overview 531
2 Interfaces 532
2.1 Front Serial Port 532
2.2 Download/Monitor Port 532
2.3 Rear Serial Port 1 532
2.4 Fibre Rear Serial Port 1 532
2.5 Rear Serial Port 2 533
2.6 Optional Rear Serial Port (SK5) 533
2.7 IRIG-B (Demodulated) 533
2.8 IRIG-B (Modulated) 533
2.9 Rear Ethernet Port Copper 534
2.10 Rear Ethernet Port Fibre 534
2.10.1 100 Base FX Receiver Characteristics 534
2.10.2 100 Base FX Transmitter Characteristics 535
3 Performance of Current Protection Functions 536
3.1 Transient Overreach and Overshoot 536
3.2 Phase Overcurrent Protection 536
3.2.1 Phase Overcurrent Directional Parameters 536
3.3 Voltage Dependent Overcurrent Protection 536
3.4 Earth Fault Protection 537
3.4.1 Earth Fault Directional Parameters 537
3.5 Sensitive Earth Fault Protection 538
3.5.1 SEF Directional Parameters 538
3.6 Restricted Earth Fault Protection 538
3.7 Negative Sequence Overcurrent Protection 539
3.7.1 NPSOC Directional Parameters 539
3.8 Circuit Breaker Fail and Undercurrent Protection 539
3.9 Broken Conductor Protection 539
3.10 Thermal Overload Protection 539
3.11 Cold Load Pickup Protection 540
3.12 Selective Overcurrent Protection 540
3.13 Voltage Dependent Overcurrent Protection 540
3.14 Neutral Admittance Protection 540
Contents P14x
xvi P14xEd1-TM-EN-1
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