GE MiCOM P40 Agile User Manual

4.9 Cross Country Fault Protection 175
5 Delta Directional Element 176
5.1 Delta Directional Principle and Setup 176
5.2 Delta Directional Decision 177
6 Distance Isolated and Compensated Systems 179
6.1 Peterson Coil Earthed Systems 179
6.2 Earth Fault Distance Protection for Isolated and Compensated Systems 182
6.2.1 Single-phase to Earth Faults on Isolated or Compensated Systems 183
6.2.2 Cross-Country Faults on Isolated or Compensated Systems 183
6.3 Implementation of Distance Protection for Isolated and Compensated Networks 184
6.3.1 Network Earthing System Setting 184
6.3.2 First Earth FaultDetection 184
6.3.3 Fault Detection Logic 186
6.3.4 Phase Preferential Logic 187
7 Application Notes 193
7.1 Setting Mode Choice 193
7.2 Operating Characteristic Selection 193
7.2.1 Phase Characteristic 193
7.2.2 Earth Fault Characteristic 194
7.3 Zone Reach Setting Guidelines 194
7.3.1 Quadrilateral Resistive Reaches 195
7.4 Earth Fault Resistive Reaches and Tilting 195
7.4.1 Dynamic Tilting 196
7.4.2 Fixed Tilting 197
7.5 Phase Fault Zone Settings 197
7.6 Directional Element for Distance Protection 198
7.7 Filtering Setup 198
7.7.1 Distance Digital Filter 198
7.7.2 Setting up CVTs 198
7.8 Load Blinding Setup 199
7.9 Polarizing Setup 199
7.10 Delta Directional Element Setting Guidelines 200
7.10.1 Delta Thresholds 200
7.11 Distance Protection Worked Example 201
7.11.1 Line Impedance Calculation 202
7.11.2 Residual Compensation for Earth Fault Elements 202
7.11.3 Zone 1 Phase and Ground Reach Settings 202
7.11.4 Zone 2 Phase and Ground Reach Settings 203
7.11.5 Zone 3 Phase and Ground Reach Settings 203
7.11.6 Zone 3 Reverse Reach Settings 203
7.11.7 Zone 4 Reverse Reach Settings 203
7.11.8 Load Avoidance 204
7.11.9 Quadrilateral Resistive Reach Settings 204
7.12 Teed Feeder Applications 206
Chapter 8 Carrier Aided Schemes 207
1 Chapter Overview 209
2 Introduction 210
3 Carrier Aided Schemes Implementation 211
3.1 Carrier Aided Scheme Types 211
3.2 Default Carrier Aided Schemes 212
4 Aided Distance Scheme Logic 213
4.1 Permissive Underreach Scheme 213
4.2 Permissive Over-reach Scheme 214
4.2.1 Permissive Overreach Trip Reinforcement 216
4.2.2 Permissive Overreach Weak Infeed Features 217
4.3 Permissive Scheme Loss Of Guard 217
P543i/P545i Contents
P54x1i-TM-EN-1 v

GE MiCOM P40 Agile Specifications

General

Brand	GE
Model	MiCOM P40 Agile
Category	Control Unit
Language	English