Table Of Contents - Toshiba GRT100 Series Instruction Manual

Contents
Safety Precautions
1. Introduction
2. Application Notes
2.1 Application
2.2 Protection Scheme
2.3 Current Differential Protection
2.3.1 Differential Scheme
2.3.2 Matching of CT Secondary Currents
2.3.3 Connection between CT Secondary Circuit and the GRT100
2.3.4 Setting
2.4 Restricted Earth Fault Protection
2.5 Overcurrent Protection
2.6 Thermal Overload Protection
2.7 Frequency Protection
2.8 Overexcitation Protection
2.9 Trip by External Devices
2.10 Tripping Output
2.11 Characteristics of Measuring Elements
2.11.1
2.11.2
2.11.3
2.11.4
2.11.5
2.11.6
2.11.7
2.11.8
3. Technical Description
3.1 Hardware Description
3.1.1 Outline of Hardware Modules
3.1.2 Transformer Module
3.1.3 Signal Processing Module
3.1.4 Binary Input and Output Module
3.1.5 Human Machine Interface (HMI) Module
3.2 Input and Output Signals
3.2.1 Input Signals
3.2.2 Binary Output Signals
3.2.3 PLC (Programmable Logic Controller) Function
3.3 Automatic Supervision
3.3.1 Basic Concept of Supervision
3.3.2 Relay Monitoring and Testing
Percentage Current Differential Element DIF
High-set Overcurrent Element HOC
Restricted Earth Fault Element REF
Inverse Time Overcurrent Element OCI and EFI
Definite Time Overcurrent element OC and EF
Thermal Overload Element THR
Frequency Element FRQ
Overexcitation Element V/F
 4 
6 F 2 S 0 7 8 9
1
8
9
9
10
12
12
14
15
16
22
26
31
32
34
36
37
38
38
39
39
40
41
42
44
44
45
45
45
48
49
50
53
55
55
56
57
58
58
58