GE P24DM Technical Manual page 7

P24xM
2.1 Restricted Earth Fault Types
2.1.1 Low Impedance Bias Characteristic
2.1.2 High Impedance REF Principle
3 Restricted Earth Fault Protection Implementation
3.1 Restricted Earth Fault Protection Settings
3.2 Low Impedance REF
3.2.1 Setting the Bias Characteristic
3.2.2 Delayed Bias
3.3 High Impedance REF
3.3.1 High Impedance REF Calculation Principles
4 Application Notes
4.1 Low Impedance REF Protection Application
4.1.1 Setting Guidelines for Biased Operation
4.1.2 Low Impedance REF Scaling Factor
4.2 High Impedance REF Protection Application
4.2.1 Setting Guidelines for High Impedance Operation
Chapter 8 CB Fail Protection
1 Chapter Overview
2 Circuit Breaker Fail Protection
3 Circuit Breaker Fail Implementation
3.1 Circuit Breaker Fail Timers
3.2 Zero Crossing Detection
4 Circuit Breaker Fail Logic
5 Undercurrent and ZCD Logic for CB Fail
6 CB Fail SEF Protection Logic
7 CB Fail Non Current Protection Logic
8 Circuit Breaker Mapping
9 Application Notes
9.1 Reset Mechanisms for CB Fail Timers
9.2 Setting Guidelines (CB fail Timer)
9.3 Setting Guidelines (Undercurrent)
Chapter 9 Current Transformer Requirements
1 Chapter Overview
2 CT requirements
2.1 Phase Overcurrent Protection
2.1.1 Directional Elements
2.1.2 Non-directional Elements
2.2 Earth Fault Protection
2.2.1 Directional Elements
2.2.2 Non-directional Elements
2.3 SEF Protection (Residually Connected)
2.3.1 Directional Elements
2.3.2 Non-directional Elements
2.4 SEF Protection (Core-Balanced CT)
2.4.1 Directional Elements
2.4.2 Non-directional Elements
2.5 Low Impedance REF Protection
2.6 High Impedance REF Protection
2.7 Use of Metrosil Non-linear Resistors
2.8 Use of ANSI C-class CTs
Chapter 10 Voltage Protection Functions
1 Chapter Overview
P24xM-TM-EN-2.1
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