Table of Contents
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Contents
Safety Precautions
1.
Introduction
2.
Application Notes
2.1 Protection schemes
2.2 Current Differential Protection
2.2.1 Operation of Current Differential Protection
2.2.2 Characteristic of Current Differential Element DIF
2.2.3 Fail-safe Function
2.2.4 Open Terminal (Out-of-Service) Detection
2.2.5 Transmission Data
2.2.6 Synchronized Sampling
2.2.7 Telecommunication Circuit
2.2.8 Telecommunication Channel Monitoring
2.2.9 Setting
2.3 Phase Fault Overcurrent Protection
2.3.1 Inverse Time (IDMT) Operation
2.3.2 Scheme Logic
2.3.3 Setting
2.4 Earth Fault Protection
2.4.1 Scheme Logic
2.4.2 Setting
2.5 Sensitive Earth Fault Protection
2.5.1 Scheme Logic
2.5.2 Setting
2.6 Phase Undercurrent Protection
2.6.1 Scheme Logic
2.6.2 Setting
2.7 Thermal Overload Protection
2.7.1 Scheme Logic
2.7.2 Setting
2.8 Broken Conductor Protection
2.8.1 Scheme Logic
2.8.2 Setting
2.9 Breaker Failure Protection
2.9.1 Scheme Logic
2.9.2 Setting
2.10 Countermeasures for Magnetising Inrush
2.10.1 Inrush Current Detector
2.10.2 Cold Load Protection
2.10.2 Setting
2.11 Transfer Trip Function
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