GE P24DM Technical Manual page 5

P24xM
5 Settings Group Selection
Chapter 6 Current Protection Functions
1 Chapter Overview
2 Thermal Overload Protection
2.1 Thermal Overload Protection
2.2 Thermal Replica
2.3 Thermal Trip
2.4 User programmable curve for thermal overload protection
2.5 Application Notes
2.5.1 Thermal Overload Setting Guidelines
3 Overcurrent Protection Principles
3.1 IDMT Characteristics
3.1.1 IEC 60255 IDMT Curves
3.1.2 European Standards
3.1.3 North American Standards
3.1.4 IEC and IEEE Inverse Curves
3.1.5 Differences Between the North american and European Standards
3.1.6 Programmable Curves
3.2 Principles of Implementation
3.2.1 Timer Hold Facility
4 Phase Overcurrent Protection
4.1 Phase Overcurrent Protection Implementation
4.2 Non-Directional Overcurrent Logic
4.3 Directional Element
4.3.1 Directional Overcurrent Logic
4.4 Application Notes
4.4.1 Short Circuit Protection
5 Current Setting Threshold Selection
6 Negative Sequence Overcurrent Protection
6.1 Negative Sequence Overcurrent Protection Implementation
6.2 Non-Directional Negative Sequence Overcurrent Logic
6.3 Directional Element
6.3.1 Directional Negative Sequence Overcurrent Logic
6.4 Phase Rotation
6.5 Application Notes
6.5.1 Negative Sequence Protection
7 Earth Fault Protection
7.1 Earth Fault Protection Elements
7.2 Non-directional Earth Fault Logic
7.3 IDG Curve
7.4 Directional Element
7.4.1 Residual Voltage Polarisation
7.4.2 Negative Sequence Polarisation
7.5 Application Notes
7.5.1 Setting Guidelines (Directional Element)
7.5.2 Peterson Coil Earthed Systems
7.5.3 Setting Guidelines (Compensated networks)
7.5.4 Solidly Earthed System
7.5.5 Insulated System
7.5.6 Resistance Earthed Systems
7.5.7 High Resistance Earthing
7.5.8 Petersen coil earthed systems
7.5.9 Operation of sensitive earth fault element
8 Sensitive Earth Fault Protection
8.1 SEF Protection Implementation
8.2 Non-directional SEF Logic
P24xM-TM-EN-2.1
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