GE MiCOM P40 Agile Technical Manual page 6

Contents
10.4.1 Fifth Harmonic Blocking
10.5 Logic for Feeders with In-Zone Transformers
10.6 Second Harmonic Blocking Logic
10.7 Fifth Harmonic Blocking Logic
11 Current Differential Intertripping
12 Stub Bus Differential Protection
13 Application Notes
13.1 Setting Up the Phase Differential Characteristic
13.2 Sensitivity Under Heavy Loads
13.3 Permissive Intertripping
13.4 CT Ratio Correction Setting Guidelines
13.5 Feeders with Small Tapped Loads
13.6 Setting a Two-Terminal Phase Current Differential Element
13.7 Setting a Three-Terminal Phase Current Differential Element
Chapter 7 Distance Protection
1 Chapter Overview
2 Introduction
2.1 Distance Protection Principle
2.2 Performance Influencing Factors
2.3 Impedance Calculation
2.4 Implementation with Comparators
2.5 Polarization of Distance Characteristics
3 Distance Measuring Zones Operating Principles
3.1 Mho Characteristics
3.1.1 Directional Mho Characteristic for Phase Faults
3.1.2 Offset Mho Characteristic for Phase Faults
3.1.3 Directional Self-Polarized Mho Characteristic for Earth Faults
3.1.4 Offset Mho Characteristic for Earth Faults
3.1.5 Memory Polarization of Mho Characteristics
3.1.6 Dynamic Mho Expansion and Contraction
3.1.7 Cross Polarization of Mho Characteristics
3.1.8 Implementation of Mho Polarization
3.2 Quadrilateral Characteristic
3.2.1 Directional Quadrilaterals
3.2.2 Earth Fault Quadrilateral Characteristics
3.3 Quadrilateral Characteristic for Phase Faults
3.3.1 Phase Fault Impedance Reach Line
3.3.2 Phase Fault Reverse Impedance Reach Line
3.3.3 Phase Fault Resistive Reach Line
3.3.4 Phase Fault Reverse Resistive Reach Line
3.3.5 Phase Fault Quadrilateral Characteristic Summary
4 Phase and Earth Fault Distance Protection Implementation
4.1 Phase Fault Characteristics
4.2 Earth Fault Characteristics
4.3 Distance Protection Tripping Decision
4.4 Distance Protection Phase Selection
4.4.1 Faulted Phase Selection
4.5 Biased Neutral Current Detector
4.6 Distance Element Zone Settings
4.6.1 Directionalizing the Distance Elements
4.6.2 Advanced Distance Zone Settings
4.6.3 Distance Zone Sensitivities
4.7 Capacitor VT Applications
4.7.1 CVTs with Passive Suppression of Ferroresonance
4.7.2 CVTs with Active Suppression of Ferroresonance
4.8 Load Blinding
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