GE P24DM - Page 14

5.1.2 Insulation 405
5.1.3 External Wiring 405
5.1.4 Watchdog Contacts 405
5.1.5 Power Supply 405
5.2 Product Checks with the IED Energised 405
5.2.1 Watchdog Contacts 406
5.2.2 Test LCD 406
5.2.3 Date and Time 406
5.2.4 Test LEDs 406
5.2.5 Test Alarm and Out-of-Service LEDs 407
5.2.6 Test Trip LED 407
5.2.7 Test User-programmable LEDs 407
5.2.8 Test Opto-inputs 407
5.2.9 Test Output Relays 407
5.2.10 Test Serial Communication Port RP1 407
5.2.11 Test Serial Communication Port RP2 409
5.2.12 Test Ethernet Communication 409
5.2.13 Test Current Inputs 409
5.2.14 Test Voltage Inputs 410
6 Setting Checks 412
6.1 Apply Application-specific Settings 412
6.1.1 Transferring Settings from a Settings File 412
6.1.2 Entering settings using the HMI 412
7 Protection Timing Checks 414
7.1 Overcurrent Check 414
7.2 Connecting the Test Circuit 414
7.3 Performing the Test 414
7.4 Check the Operating Time 414
8 Onload Checks 416
8.1 Confirm Current Connections 416
8.2 Confirm Voltage Connections 416
8.3 On-load Directional Test 417
9 Final Checks 418
Chapter 20 Maintenance and Troubleshooting 419
1 Chapter Overview 421
2 Maintenance 422
2.1 Maintenance Checks 422
2.1.1 Alarms 422
2.1.2 Opto-isolators 422
2.1.3 Output Relays 422
2.1.4 Measurement Accuracy 422
2.2 Replacing the Unit 423
2.3 Cleaning 423
3 Troubleshooting 424
3.1 Self-Diagnostic Software 424
3.2 Power-up Errors 424
3.3 Error Message or Code on Power-up 424
3.4 Out of Service LED on at Power-up 425
3.5 Error Code during Operation 425
3.6 Mal-operation during testing 426
3.6.1 Failure of Output Contacts 426
3.6.2 Failure of Opto-inputs 426
3.6.3 Incorrect Analogue Signals 426
3.7 PSL Editor Troubleshooting 426
3.7.1 Diagram Reconstruction 427
3.7.2 PSL Version Check 427
Contents P24xM
xii P24xM-TM-EN-2.1