Transformer Protection IED – CSC-326

Local human-machine interface
4 IED menu
4.2 Operation status ………………………………………………………………………………………………… 9
4.3 Query reports ………………………………………………………………………………………………….. 10
4.4 Set time …………………………………………………………………………………………………………… 10
4.5 Contrast …………………………………………………………………………………………………………… 10
4.6 Settings …………………………………………………………………………………………………………… 11
4.7 IED setting ………………………………………………………………………………………………………. 11
4.8 Test binary output ……………………………………………………………………………………………. 12
4.9 Testing operation …………………………………………………………………………………………….. 12
3.1.2 Terminals of Analogue Input Module (AIM) ……………………………………………….. 17
3.1.3 Terminals of Binary Input Module (BIM) ……………………………………………………. 18
3.1.4 Terminals of Binary Output Module (BOM) ……………………………………………….. 19
3.1.5 Terminals of Communication module (COM) ……………………………………………. 23
3.1.6 Communication ports of CPU module (CPU) ……………………………………………. 24
3.1.7 Terminals of Power Supply Module (PSM) ……………………………………………….. 25
3.1.8 RS232 port ……………………………………………………………………………………………….. 26
3.2 Connecting to Protective Earth…………………………………………………………………………. 26
3.3 Connecting the power supply module ……………………………………………………………… 26
3.4 Connecting to CT and VT circuits ……………………………………………………………………. 26
3.5 Connecting the binary inputs and outputs………………………………………………………… 26
3.6 Making the screen connection …………………………………………………………………………. 28
3.7 Optical connections …………………………………………………………………………………………. 28
3.8 RS485 and RS232 ports connection ……………………………………………………………….. 29
3.8.1 RS485 port connection …………………………………………………………………………….. 29
3.8.2 RS232 port connection …………………………………………………………………………….. 29
3.9 Connecting the GPS………………………………………………………………………………………… 30
4 Checking before energizing …………………………………………………………………………………………… 31
Checking the power supply connection …………………………………………………………… 31
4.4 Checking the CT and VT circuits connection …………………………………………………… 31
4.4.1 Checking the CT circuits connection ………………………………………………………… 31
4.4.2 Checking the VT connection …………………………………………………………………….. 32
4.5 Checking the binary input and output connection ……………………………………………. 32
4.5.1 Checking the binary input connection ………………………………………………………. 32
4.5.2 Checking the binary output connection …………………………………………………….. 33
4.6 Checking the screened cables connection ………………………………………………………. 33
4.7 Checking the optical connections ……………………………………………………………………. 33
4.8 Checking the S485 and RS232 port connections ………………………………………………. 33
4.8.1 Checking the RS485 port connection ……………………………………………………….. 33
4.8.2 Checking RS232 port connection …………………………………………………………….. 33
4.9 Checking GPS connection ………………………………………………………………………………. 33
4.10 Checking the insulation voltage and insulation resistance ………………………………. 33
4.10.1 Checking the insulation voltage ……………………………………………………………….. 34
4.10.2 Checking the Insulation Resistance…………………………………………………………… 34
5 Checking after energizing ……………………………………………………………………………………………… 35
5.2 Test LCD …………………………………………………………………………………………………………. 35
5.3 Test the keyboard ……………………………………………………………………………………………. 35
5.4 Setting the IED time ………………………………………………………………………………………… 35
5.5 Self-supervision HMI data ……………………………………………………………………………….. 36
5.6 Checking the software and hardware version ………………………………………………….. 36
Chapter 4 Read and change setting ………………………………………………………………………………… 37
1 Read and change the setting value ……………………………………………………………………………….. 38
1.1 Read and change the setting value via LHMI ………………………………………………….. 38
1.1.1 Introduction ………………………………………………………………………………………………. 38
1.1.2 Communication parameter ……………………………………………………………………….. 38
1.1.3 Equipment parameter ………………………………………………………………………………. 39
1.1.4 Setting values and binary settings for protection function …………………………. 39
2 Switching the setting group ……………………………………………………………………………………………. 46
2.1 Introduction ……………………………………………………………………………………………………… 46
2.2 Method for switching setting group via LHMI …………………………………………………… 46
2.3 Method for switching setting group via binary input …………………………………………. 46
Chapter 5 Testing the communication connection and time synchronization ……………………. 47
1 Testing the communication connection ………………………………………………………………………….. 48
1.1 Testing the Ethernet communication ……………………………………………………………….. 48
1.1.1 Testing the electrical Ethernet communication …………………………………………. 48
1.1.2 Testing the optical Ethernet communication ……………………………………………… 48
1.2 Testing the RS485 port……………………………………………………………………………………. 48
1.3 Testing the RS232 port……………………………………………………………………………………. 48
2 Testing the time synchronization ……………………………………………………………………………………. 50
2.1 Network mode …………………………………………………………………………………………………. 50
2.2 Pulse mode ……………………………………………………………………………………………………… 50
2.3 IRIG-B mode ……………………………………………………………………………………………………. 50
Chapter 6 IED testing ………………………………………………………………………………………………………. 51
1 Introduction ……………………………………………………………………………………………………………………. 52
2 Points for attention during testing…………………………………………………………………………………… 54
3 Preparing for test …………………………………………………………………………………………………………… 56
3.1 Introduction ……………………………………………………………………………………………………… 56
3.2 Connecting test equipment to IED …………………………………………………………………… 56
4 Testing the power supply ……………………………………………………………………………………………….. 58
4.1 Checking the self-startup performance ……………………………………………………………. 58
4.2 DC power on and power off testing………………………………………………………………….. 58
4.3 Checking the expiry date of power supply ……………………………………………………….. 58
5 Checking the analog channel ………………………………………………………………………………………… 59
5.1 Checking the zero drift …………………………………………………………………………………….. 59
5.2 Calibrating ……………………………………………………………………………………………………….. 59
5.3 Checking the accuracy and the linearity of analog quantitis …………………………….. 60
5.4 Checking the polarity of analog quantities ……………………………………………………….. 60
6 Testing binary input ……………………………………………………………………………………………………….. 62
7 Testing binary output ……………………………………………………………………………………………………… 63
8 Verifying the IED functions …………………………………………………………………………………………….. 64
8.1 Instantaneous differential protection ………………………………………………………………… 64
8.1.1 Verifying the settings ………………………………………………………………………………… 64
8.1.2 Completing the test ………………………………………………………………………………… 66
8.1.3 Reference setting list for test ……………………………………………………………………. 66
8.2 Percentage differential protection ……………………………………………………………………. 66
8.2.1 Verifying the settings ………………………………………………………………………………… 66
8.2.2 Completing the test ………………………………………………………………………………… 76
8.2.3 Reference setting list for test ……………………………………………………………………. 77
8.3 Restricted earth fault protection……………………………………………………………………….. 79
8.3.1 Verifying the settings ………………………………………………………………………………… 79
8.3.2 Completing the test ………………………………………………………………………………… 81
8.3.3 Reference setting list for test ……………………………………………………………………. 81
8.4 Overexcitation protection …………………………………………………………………………………. 83
8.4.1 Verifying the settings ………………………………………………………………………………… 83
8.4.2 Completing the test ………………………………………………………………………………… 88
8.4.3 Reference setting list for test ……………………………………………………………………. 88
8.5 Overcurrent protection …………………………………………………………………………………….. 90
8.5.1 Verifying the settings ………………………………………………………………………………… 90
8.5.2 Completing the test …………………………………………………………………………………… 97
8.5.3 Reference setting list for test ……………………………………………………………………. 97
8.6 Earth fault protection ……………………………………………………………………………………… 103
8.6.1 Verifying the settings ………………………………………………………………………………. 103
8.6.2 Completing the test …………………………………………………………………………………. 109
8.6.3 Reference setting list for test ………………………………………………………………….. 110
8.7 Neutral earth fault protection …………………………………………………………………………. 115
8.7.1 Verifying the settings ………………………………………………………………………………. 115
8.7.2 Completing the test ………………………………………………………………………………… 121
8.7.3 Reference setting list for test ………………………………………………………………….. 122
8.8 Thermal overload protection ………………………………………………………………………….. 127
8.8.1 Verifying the settings ………………………………………………………………………………. 127
8.8.2 Completing the test ………………………………………………………………………………… 137
8.8.3 Reference setting list for test ………………………………………………………………….. 137
8.9 Overload protection ……………………………………………………………………………………….. 138
8.9.1 Verifying the settings ………………………………………………………………………………. 138
8.9.2 Completing the test ………………………………………………………………………………… 142
8.9.3 Reference setting list for test ………………………………………………………………….. 142
8.10 Overvoltage protection ………………………………………………………………………………….. 144
8.10.1 Verifying the settings ………………………………………………………………………………. 144
8.10.2 Completing the test ………………………………………………………………………………… 150
8.10.3 Reference setting list for test ………………………………………………………………….. 150
8.11 Circuit breaker failure protection ……………………………………………………………………. 151
8.11.1 Verifying the settings ………………………………………………………………………………. 152
8.11.2 Completing the test ………………………………………………………………………………… 156
8.11.3 Reference setting list for test ………………………………………………………………….. 156
8.12 Dead zone protection …………………………………………………………………………………….. 158
8.12.1 Verifying the settings ………………………………………………………………………………. 158
8.12.2 Completing the test ………………………………………………………………………………… 161
8.12.3 Reference setting list for test ………………………………………………………………….. 161
8.13 STUB protection ……………………………………………………………………………………………. 161
8.13.1 Verifying the settings ………………………………………………………………………………. 162
8.13.2 Completing the test ………………………………………………………………………………… 164
8.13.3 Reference setting list for test ………………………………………………………………….. 164
8.14 Poles discordance protection ………………………………………………………………………… 164
8.14.1 Verifying the settings ………………………………………………………………………………. 165
8.14.2 Completing the test ………………………………………………………………………………… 169
8.14.3 Reference setting list for test ………………………………………………………………….. 169
8.15 Voltage transformer secondary circuit supervision ………………………………………… 170
8.15.1 Verifying the settings ………………………………………………………………………………. 170
8.15.2 Completing the test ………………………………………………………………………………… 181
8.15.3 Reference setting list for test ………………………………………………………………….. 181
9 Checking before operation …………………………………………………………………………………………… 183
9.1 Checking the LED …………………………………………………………………………………………. 183
9.2 Checking the display on LCD ………………………………………………………………………… 183
9.3 Checking the clock ………………………………………………………………………………………… 183
9.4 Checking the voltage and current ………………………………………………………………….. 183
9.5 Checking the setting group ……………………………………………………………………………. 183
9.6 Checking the setting ……………………………………………………………………………………… 183
9.7 Checking the binary input ………………………………………………………………………………. 184
9.8 Checking the normal operation mode …………………………………………………………….. 184
9.8.1 Trip and close test with the circuit breaker ………………………………………………. 184
9.9 Put into operation …………………………………………………………………………………………… 184
Chapter 7 Operating maintenance …………………………………………………………………………………. 186
1 Attentions during operating ………………………………………………………………………………………….. 187
2 Routine checking …………………………………………………………………………………………………………. 189
3 Periodical checking ……………………………………………………………………………………………………… 190
4 Operation after updating software or replacing modules ………………………………………………. 191
4.1 Operation after updating software or replacing CPU module …………………………. 191
4.2 Operation after updating software or replacing communication module …………. 191
4.3 Operation after replacing the binary input or output module …………………………… 192
4.4 Operation after replacing the analog input module ………………………………………… 192
4.5 Operation after replacing power supply module …………………………………………….. 192
5 The alarm information and measure …………………………………………………………………………….. 193
5.1 Alarm information and the measure ……………………………………………………………….. 193
Chapter 8 Transportation and storage ……………………………………………………………………………. 196
1 Transportion…………………………………………………………………………………………………………………. 197
2 Storage ………………………………………………………………………………………………………………………… 198
Chapter 9 Appendix ……………………………………………………………………………………………………….. 200
1 Arrangement diagram of modules ………………………………………………………………………………… 201
2 Typical diagram ……………………………………………………………………………………………………………. 202

Chapter 2 Basic protection elements ………………………………………………………………….. 9
1 Startup element ……………………………………………………………………………………………10
1.1 Introduction ……………………………………………………………………………………..10
1.2 Sudden-change current startup element ………………………………………………10
1.3 Differential current startup element ……………………………………………………..10
2 Input and output signals ……………………………………………………………………………….. 11
3 Settings ………………………………………………………………………………………………………13
4 Report ………………………………………………………………………………………………………..16
Chapter 3 Differential protection ………………………………………………………………………..17
1 Introduction …………………………………………………………………………………………………18
2 Applications…………………………………………………………………………………………………18
3 Protection algorithm ……………………………………………………………………………………..19
3.1 Differential and restraint current calculation ………………………………………….20
3.2 Automatic Ratio compensation …………………………………………………………..22
3.3 Automatic Vector group and zero sequence current compensation …………..26
4 Protection principle……………………………………………………………………………………….32
4.1 Instantaneous differential protection characteristic …………………………………32
4.2 Treble slope percent differential protection characteristic ………………………..34
4.3 Selective inrush stabilization schemes …………………………………………………37
4.3.1 2nd harmonic stabilization …………………………………………………………………38
4.3.2 Fuzzy recognition of inrush based on the waveform ………………………………38
4.4 Overexcitation stabilization ………………………………………………………………..40
4.5 CT Failure supervision ………………………………………………………………………42
4.6 CT Saturation supervision ………………………………………………………………….43
4.7 Differential current supervision……………………………………………………………44
5 Input and output signals ………………………………………………………………………………..46
6 Settings ………………………………………………………………………………………………………47
7 Report ………………………………………………………………………………………………………..50
8 Technical data ……………………………………………………………………………………………..51
Chapter 4 Restricted earth fault protection ………………………………………………………….53
1 Introduction …………………………………………………………………………………………………54
2 Applications…………………………………………………………………………………………………54
3 Protection principle……………………………………………………………………………………….56
3.1 Differential and restraint current calculation ………………………………………….57
3.2 Automatic Ratio compensation …………………………………………………………..59
3.3 Positive sequence current blocking ……………………………………………………..61
3.4 Restricted earth fault current alarm ……………………………………………………..62
4 Input and output signals ………………………………………………………………………………..63
5 Settings ………………………………………………………………………………………………………64
6 Report ………………………………………………………………………………………………………. 66
7 Technical data …………………………………………………………………………………………….. 67
Chapter 5 Overexcitation protection ………………………………………………………………….. 69
1 Introduction ………………………………………………………………………………………………… 70
2 Protection principle ……………………………………………………………………………………… 70
2.1 Protection principle ………………………………………………………………………….. 70
2.2 Voltage channel configuration …………………………………………………………… 76
3 Input and output signals ……………………………………………………………………………….. 77
4 Settings …………………………………………………………………………………………………….. 78
5 Report ………………………………………………………………………………………………………. 79
6 Technical data …………………………………………………………………………………………….. 80
Chapter 6 Overcurrent protection……………………………………………………………………… 83
1 Introduction ………………………………………………………………………………………………… 84
2 Protection principle ……………………………………………………………………………………… 84
2.1 Protection Elements ………………………………………………………………………… 84
2.2 Inrush Restraint Feature …………………………………………………………………… 86
2.3 Direction Determination Feature ………………………………………………………… 87
2.4 CBF initiation Feature ……………………………………………………………………… 90
3 Input and output signals ……………………………………………………………………………….. 91
4 Setting ………………………………………………………………………………………………………. 92
5 Report ………………………………………………………………………………………………………. 99
6 Technical data …………………………………………………………………………………………….. 99
Chapter 7 Earth fault protection ……………………………………………………………………… 101
1 Protection principle ……………………………………………………………………………………. 102
1.1 Protection elements ………………………………………………………………………. 102
1.2 Inrush Restraint Feature …………………………………………………………………. 104
1.3 Direction Determination Feature ………………………………………………………. 105
1.4 CBF initiation Feature ……………………………………………………………………. 107
2 Input and output signals ……………………………………………………………………………… 108
3 Setting …………………………………………………………………………………………………….. 109
4 Report …………………………………………………………………………………………………….. 115
5 Technical data …………………………………………………………………………………………… 116
Chapter 8 Neutral earth fault protection …………………………………………………………… 119
1 Protection principle ……………………………………………………………………………………. 120
1.1 Protection Elements ………………………………………………………………………. 120
1.2 Inrush Restraint Feature …………………………………………………………………. 122
1.3 Direction Determination Feature ………………………………………………………. 122
1.4 CBF initiation Feature ……………………………………………………………………. 124
2 Input and output signals ……………………………………………………………………………… 125
3 Setting …………………………………………………………………………………………………….. 126
4 Report …………………………………………………………………………………………………….. 132
5 Technical data …………………………………………………………………………………………… 133
Chapter 9 Thermal overload protection ……………………………………………………………. 135
1 Introduction ………………………………………………………………………………………………. 136
2 Protection principle…………………………………………………………………………………….. 136
3 Input and output signals ……………………………………………………………………………… 138
4 Setting ……………………………………………………………………………………………………… 138
5 Report ……………………………………………………………………………………………………… 140
6 Technical data …………………………………………………………………………………………… 141
Chapter 10 Overload protection ……………………………………………………………………….. 143
1 Protection principle…………………………………………………………………………………….. 144
2 Input and output signals ……………………………………………………………………………… 145
3 Setting ……………………………………………………………………………………………………… 146
4 Report ……………………………………………………………………………………………………… 148
Chapter 11 Overvoltage protection ……………………………………………………………………. 149
5 Introduction ………………………………………………………………………………………………. 150
6 Protection principle…………………………………………………………………………………….. 150
6.1 Phase to phase overvoltage protection ……………………………………………… 150
6.2 Phase to earth overvlotage protection……………………………………………….. 151
7 Logic diagram …………………………………………………………………………………………… 151
8 Input and output signals ……………………………………………………………………………… 151
9 Setting ……………………………………………………………………………………………………… 152
10 Report ……………………………………………………………………………………………….. 154
11 Technical data …………………………………………………………………………………….. 154
Chapter 12 Circuit breaker failure protection ………………………………………………………. 157
1 Introduction ………………………………………………………………………………………………. 158
2 Protection principle…………………………………………………………………………………….. 158
3 Logic diagram …………………………………………………………………………………………… 161
4 Input and output signals ……………………………………………………………………………… 163
5 Setting ……………………………………………………………………………………………………… 164
6 Report ……………………………………………………………………………………………………… 167
7 Technical data …………………………………………………………………………………………… 167
Chapter 13 Dead zone protection ……………………………………………………………………… 169
1 Introduction ………………………………………………………………………………………………. 170
2 Protection principle…………………………………………………………………………………….. 170
2.1 Function description……………………………………………………………………….. 171
3 Logic diagram …………………………………………………………………………………………… 171
4 Input and output signals ……………………………………………………………………………… 172
5 Setting ……………………………………………………………………………………………………… 173
6 Report ……………………………………………………………………………………………………… 174
7 Technical data …………………………………………………………………………………………… 174
Chapter 14 STUB protection ……………………………………………………………………………. 175
1 Introduction ………………………………………………………………………………………………. 176
2 Protection principle…………………………………………………………………………………….. 176
2.1 Function description……………………………………………………………………….. 176
3 Logic diagram …………………………………………………………………………………………… 177
4 Input and output signals ……………………………………………………………………………… 177
5 Setting ……………………………………………………………………………………………………… 178
6 Report …………………………………………………………………………………………………….. 180
7 Technical data …………………………………………………………………………………………… 181
Chapter 15 Poles discordance protection ………………………………………………………….. 183
1 Introdcution ………………………………………………………………………………………………. 184
2 Protection principle ……………………………………………………………………………………. 184
2.1 Function description ………………………………………………………………………. 184
3 Logic diagram …………………………………………………………………………………………… 185
4 Input and output signals ……………………………………………………………………………… 186
5 Setting …………………………………………………………………………………………………….. 187
6 Report …………………………………………………………………………………………………….. 188
7 Technical data …………………………………………………………………………………………… 188
Chapter 16 Secondary system supervision ………………………………………………………… 189
1 VT failure supervision function …………………………………………………………………….. 190
2 Function principle ……………………………………………………………………………………… 190
3 Input and output signals ……………………………………………………………………………… 193
4 Setting …………………………………………………………………………………………………….. 194
5 Report …………………………………………………………………………………………………….. 195
6 Technical data …………………………………………………………………………………………… 196
Chapter 17 External BIs to trip BOs ………………………………………………………………….. 197
1 Introduction ………………………………………………………………………………………………. 198
2 Function principle ……………………………………………………………………………………… 198
3 BI Trigger Record ……………………………………………………………………………………… 199
4 BI Switch SetGroup …………………………………………………………………………………… 200
5 BI “Blk Rem Access” and “RELAY TEST” ………………………………………………………. 200
6 BI “BI_Config1~ BI_Config2” and “BI TRIGGER DR1~ 10” ………………………………. 201
7 Setting …………………………………………………………………………………………………….. 201
Chapter 18 Station communication …………………………………………………………………… 203
1 Overview …………………………………………………………………………………………………. 204
1.1 Protocol ……………………………………………………………………………………….. 204
1.1.1 LON communication protocol ……………………………………………………. 204
1.1.2 IEC61850-8 communication protocol ………………………………………….. 204
1.1.3 IEC60870-5-103 communication protocol ……………………………………. 205
1.2 Communication port ………………………………………………………………………. 205
1.2.1 Front communication port …………………………………………………………. 205
1.2.2 RS485 communication ports ……………………………………………………… 205
1.2.3 Ethernet communication ports …………………………………………………… 205
1.3 Technical data ………………………………………………………………………………. 205
Front communication port …………………………………………………………………………………. 206
RS485 communication port ………………………………………………………………………………. 206
2 Typicalcommunication scheme ……………………………………………………………………. 208
2.1 Typical substation communication scheme ………………………………………… 208
2.2 Typical time synchronizing scheme ………………………………………………….. 208
Chapter 19 Hardware …………………………………………………………………………………….. 211
This chapter describes the IED hardware. …………………………………………………………… 211
3 Introduction ………………………………………………………………………………………………. 212
3.1 IED structure ………………………………………………………………………………… 212
3.2 IED appearance …………………………………………………………………………….. 212
3.3 IED module arrangement ………………………………………………………………… 213
3.4 The rear view of the protection IED …………………………………………………… 213
4 Local human-machine interface …………………………………………………………………… 214
4.1 Human machine interface ……………………………………………………………….. 214
4.2 LCD …………………………………………………………………………………………….. 215
4.3 Keypad ………………………………………………………………………………………… 215
4.4 Shortcut keys and functional keys …………………………………………………….. 216
4.5 LED …………………………………………………………………………………………….. 217
4.6 Front communication port ……………………………………………………………….. 218
5 Analog input module ………………………………………………………………………………….. 219
5.1 Introduction …………………………………………………………………………………… 219
5.2 Terminals of Analogue Input Module (AIM) ………………………………………… 219
5.3 Technical data ……………………………………………………………………………….. 220
5.3.1 Internal current transformer ……………………………………………………….. 220
5.3.2 Internal voltage transformer ………………………………………………………. 221
6 Communication module ……………………………………………………………………………… 222
6.1 Introduction …………………………………………………………………………………… 222
6.2 Substaion communication port …………………………………………………………. 222
6.2.1 RS232 communication ports ……………………………………………………… 222
6.2.2 RS485 communication ports ……………………………………………………… 222
6.2.3 Ethernet communication ports……………………………………………………. 222
6.2.4 Time synchronization port …………………………………………………………. 223

6.3 Terminals of Communication Module ………………………………………………… 223
6.4 Operating reports …………………………………………………………………………… 224
6.5 Technical data ……………………………………………………………………………….. 224
6.5.1 Front communication port …………………………………………………………. 224
6.5.2 RS485 communication port ……………………………………………………….. 225
6.5.3 Ethernet communication port …………………………………………………….. 225
6.5.4 Time synchronization ……………………………………………………………….. 226
7 Binary input module …………………………………………………………………………………… 227
7.1 Introduction …………………………………………………………………………………… 227
7.2 Terminals of Binary Input Module (BIM) …………………………………………….. 227
7.3 Technical data ……………………………………………………………………………….. 229
8 Binary output module …………………………………………………………………………………. 230
8.1 Introduction …………………………………………………………………………………… 230
8.2 Terminals of Binary Output Module (BOM) …………………………………………. 230
8.2.1 Binary Output Module A ……………………………………………………………. 230
8.2.2 Binary Output Module C ……………………………………………………………. 233
8.3 Technical data ……………………………………………………………………………….. 234
9 Power supply module …………………………………………………………………………………. 236
9.1 Introduction …………………………………………………………………………………… 236
9.2 Terminals of Power Supply Module (PSM) ………………………………………… 236
9.3 Technical data ………………………………………………………………………………. 238

10 Techinical data ……………………………………………………………………………………. 239
10.1 Basic data ……………………………………………………………………………………. 239
10.1.1 Frequency ……………………………………………………………………………… 239
10.1.2 Internal current transformer ………………………………………………………. 239
10.1.3 Internal voltage transformer ………………………………………………………. 239
10.1.4 Auxiliary voltage ……………………………………………………………………… 239
10.1.5 Binary inputs…………………………………………………………………………… 240
10.1.6 Binary outputs ………………………………………………………………………… 240
10.2 Type tests …………………………………………………………………………………….. 241
10.2.1 Product safety-related Tests ……………………………………………………… 241
10.2.2 Electromagnetic immunity tests …………………………………………………. 242
10.2.3 DC voltage interruption test ………………………………………………………. 244
10.2.4 Electromagnetic emission test …………………………………………………… 244
10.2.5 Mechanical tests ……………………………………………………………………… 244
10.2.6 Climatic tests ………………………………………………………………………….. 245
10.2.7 CE Certificate …………………………………………………………………………. 246
10.3 IED design …………………………………………………………………………………… 246
Chapter 20 Appendix ……………………………………………………………………………………… 247
1 General setting list …………………………………………………………………………………….. 248
1.1 Function setting list ……………………………………………………………………….. 248
1.2 Binary setting list …………………………………………………………………………… 266
2 General report list ……………………………………………………………………………………… 288
3 Time inverse characteristic …………………………………………………………………………. 295
3.1 11 kinds of IEC and ANSI inverse time characteristic curves ………………… 295
3.2 User defined characteristic ……………………………………………………………… 296
4 CT Requirement ……………………………………………………………………………………….. 296
4.1 Overview ……………………………………………………………………………………… 296
4.2 Current transformer classification …………………………………………………….. 296
4.3 Abbreviations (according to IEC 60044-1, -6, as defined) …………………….. 297
4.4 General current transformer requirements …………………………………………. 298
4.4.1 Protective checking current ………………………………………………………. 298
4.4.2 CT class ………………………………………………………………………………… 299
4.4.3 Accuracy class ……………………………………………………………………….. 301
4.4.4 Ratio of CT …………………………………………………………………………….. 301
4.4.5 Rated secondary current ………………………………………………………….. 301
4.4.6 Secondary burden …………………………………………………………………… 302
4.5 Rated equivalent secondary e.m.f requirements …………………………………. 302
4.5.1 Transformer differential protection ……………………………………………… 303

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