GE P4A Technical Manual page 17

P54A/B/C/E
15.3 Measure Capacitive Charging Current
15.4 Check Differential Current
15.5 Check Current Transformer Polarity
15.6 On-load Directional Test
16 Final Checks
Chapter 21 Maintenance and Troubleshooting
1 Chapter Overview
2 Maintenance
2.1 Maintenance Checks
2.1.1 Alarms
2.1.2 Opto-isolators
2.1.3 Output Relays
2.1.4 Measurement Accuracy
2.2 Replacing the Device
2.3 Repairing the Device
2.4 Removing the front panel
2.5 Replacing PCBs
2.5.1 Replacing the main processor board
2.5.2 Replacement of communications boards
2.5.3 Replacement of the input module
2.5.4 Replacement of the power supply board
2.5.5 Replacement of the I/O boards
2.6 Recalibration
2.7 Changing the battery
2.7.1 Post Modification Tests
2.7.2 Battery Disposal
2.8 Cleaning
3 Troubleshooting
3.1 Self-Diagnostic Software
3.2 Power-up Errors
3.3 Error Message or Code on Power-up
3.4 Out of Service LED on at power-up
3.5 Error Code during Operation
3.5.1 Backup Battery
3.6 Mal-operation during testing
3.6.1 Failure of Output Contacts
3.6.2 Failure of Opto-inputs
3.6.3 Incorrect Analogue Signals
3.7 Coprocessor board failures
3.7.1 Signalling failure alarm (on its own)
3.7.2 C diff failure alarm (on its own)
3.7.3 Signalling failure and C diff failure alarms together
3.7.4 Incompatible IED
3.7.5 Comms changed
3.7.6 IEEE C37.94 fail
3.8 PSL Editor Troubleshooting
3.8.1 Diagram Reconstruction
3.8.2 PSL Version Check
3.9 Repair and Modification Procedure
Chapter 22 Technical Specifications
1 Chapter Overview
2 Interfaces
2.1 Front Serial Port
2.2 Download/Monitor Port
P54xMED-TM-EN-1
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