Toshiba GRZ100 B Series, Instruction Manual, Page: 6 / 447

⎯
5
⎯
6 F 2 S 0 8 4 6
2.5.6 Voltage and Synchronism Check Elements OVL, UVL, OVB, UVB, and
SYN
113
2.5.7 Current Change Detection Elements OCD and OCDP 114
2.5.8 Negative Sequence Directional Elements DOCNF and DOCNR 115
2.5.9 Level Detectors 116
2.5.10 Fault Detector Elements 117
2.6 Autoreclose 119
2.6.1 Application 119
2.6.2 Scheme Logic 121
2.6.3 Setting 131
2.6.4 Autoreclose Output Signals 133
2.7 Fault Locator 134
2.7.1 Application 134
2.7.2 Distance to Fault Calculation 134
2.7.3 Starting Calculation 135
2.7.4 Displaying Location 136
2.7.5 Setting 136
3. Technical Description 138
3.1 Hardware Description 138
3.1.1 Outline of Hardware Modules 138
3.1.2 Transformer Module 145
3.1.3 Signal Processing Module 146
3.1.4 Binary Input and Output Module 147
3.1.5 Human Machine Interface (HMI) Module 152
3.1.6 Fault Detector Module 154
3.2 Input and Output Signals 155
3.2.1 Input Signals 155
3.2.2 Binary Output Signals 157
3.2.3 PLC (Programmable Logic Controller) Function 158
3.3 Automatic Supervision 159
3.3.1 Basic Concept of Supervision 159
3.3.2 Relay Monitoring and Testing 159
3.3.3 CT Circuit Current Monitoring 160
3.3.4 Signal Channel Monitoring and Testing 160
3.3.5 Disconnector Monitoring 161
3.3.6 Failure Alarms 161
3.3.7 Trip Blocking 162
3.3.8 Setting 162
3.4 Recording Function 163
3.4.1 Fault Recording 163
3.4.2 Event Recording 165
3.4.3 Disturbance Recording 165
3.5 Metering Function 167
4. User Interface 168