1 Chapter Overview 75
2 Settings Application Software 76
3 Using the HMI Panel 77
3.1 Navigating the HMI Panel 78
3.2 Getting Started 78
3.3 Default Display 79
3.4 Default Display Navigation 80
3.5 Password Entry 81
3.6 Processing Alarms and Records 81
3.7 Menu Structure 82
3.8 Changing the Settings 83
3.9 Direct Access (The Hotkey menu) 84
3.9.1 Setting Group Selection Using Hotkeys 84
3.9.2 Control Inputs 84
3.9.3 Circuit Breaker Control 85
3.10 Function Keys 85
4 Line Parameters 87
4.1 Tripping Mode 87
4.1.1 CB Trip Conversion Logic Diagram 87
4.2 Residual Compensation 88
4.3 Mutual Compensation 88
5 Date and Time Configuration 90
5.1 Using an SNTP Signal 90
5.2 Using an IRIG-B Signal 90
5.3 Using an IEEE 1588 PTP Signal 90
5.4 Without a Timing Source Signal 91
5.5 Time Zone Compensation 91
5.6 Daylight Saving Time Compensation 92
6 Settings Group Selection 93
Chapter 6 Current Differential Protection 95
1 Chapter Overview 97
2 Current Differential Protection Principle 98
2.1 Numerical Current Differential Protection 98
2.2 Multi-ended Line Differential Protection 99
2.3 Basic Principles and Algorithm Design for Multi-ended Differential Protection 99
2.3.1 Fault Discrimination 99
2.3.2 Differential Characteristics 100
2.3.3 Basic Algorithm 102
2.3.4 Features of Multi-Ended Line Differential 102
2.3.5 Algorithm Overview 102
2.3.6 Communication Requirements 103
3 Charging Current Compensation 104
4 Synchronisation of Current Signals 106
4.1 Time Alignment using Ping-Pong Technique 106
4.2 Remote Terminal Time Alignment 107
4.3 Time Delay Interpolation 108
5 CT Saturation 109
6 CT Compensation 112
7 Current Differential Intertripping 113
8 Stub Bus Differential Protection 114
9 Application Notes 115
9.1 Multi-End Current Differential Protection 115
9.2 Feeder Topology 116
9.3 Configuring the Feeder Topology 116
9.4 Line Parameter Data 117
P54A/B/C/E Contents
P54xMED-TM-EN-1 iii