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4.6.1

Functionality

I2/I1> – Unbalanced Load Protection

wiNPSDOC_Y19

IL2

IL1

IL3

I2/I1> .

I2/I1

PPS

NPS

filter

I2/I1> . Pickup

I2/I1> . Trip

I2/I1> .

Definition

I2/I1> . Alarm

[Device planning / Definition]

≥1

Trip

Alarm

I2/I1> .

CT .

Phase Sequence

[Field Para / General Settings]

ACB

ABC

I2/I1

◄

I2/I1> . Active

IH2 . Block. L1

IH2 . Block. L2

IH2 . Block. L3

Fig. 56: Functionality of the Unbalanced Load stage.

154 WIC1 WIC1-1.0-EN-MAN

4 Protective Elements

4.6.1 Functionality

Table of Contents3
Safety Messages and Proper Use of the WIC111
Important Definitions11
Proper Use of the Device and of this Manual12
Personal Safety15
Important Information16
WIC1 - Introduction and General Information17
Basic Wiring Concept19
Operating Concept for the WIC121
Supply of a WIC122
WIC1 Protection Features24
Functional Overview24
Device Features25
Comments on the Manual27
Symbols in Function Diagrams28
Information about the Device31
Order Form of the Device32
Order Form of the CT-Powered Device Types33
Order Form of the Dual-Powered WIC1-435
Order Form of the WIC1-Compatible Current Transformers37
Order Form WI1SZ438
Order Form WI1SZ538
Order Form of the Diggimec39
Settings - Operation40
Smart View42
Device Planning43
Modules, Settings, Signals and Values45
Measuring Values47
Reset49
Reset to Factory Defaults51
Security52
Password52
Hardware53
Overview of Elements and Connectors53
Terminals, Screws and Torques56
Dimension Drawings58
WIC1 Dimension Drawings58
Diggimec Dimension Drawings60
Dimension Drawings of the WIC1-Compatible Current Transformers62
Dimension Drawing of the Flag Indicator WI1SZ565
WIC1 - Installation and Wiring66
Grounding66
Nut "PE" for Grounding67
Selection of a WIC1-Compatible Current Transformer68
Current Ranges of the WIC1-Cts69
CT Type WE270
Selection of the CT Transformation Voltage Ratio70
Adapter Cts for 1 a73
Requirements for 1 a Standard Cts Being Used with Adapter Cts74
Phase and Ground Current Measuring Inputs77
Current Measuring Inputs for WIC1-Cts and Without Ground Current Input79
Current Measuring Inputs for WIC1-Cts with Ground Current Input80
Current Measuring Inputs for Broad-Range-Cts and Without Ground Current Input81
Current Measuring Inputs for Broad-Range-Cts with Ground Current Input82
Digital Input (Only WIC1-183
Additional Power Supply and Digital Inputs (WIC1-484
Outputs (Trip Coil, Flag Indicator, Relay Output)86
Self-Supervision Contact for the WIC1-489
Connecting a Flag Indicator to the WIC190
Impulse Signal for the Flag Indicator92
Input, Output and LED Settings93
General Pickup, General Alarm, General Trip123
4.1.1.1 Trip Pulse and WIC1 Leds125
Phase-Selective Signals, Collective Signals126
Force Trip Command128
Blockings129
Switching Protection Functions on or off129
Temporary Blocking130
Control of a Switchgear131
Switchgear Configuration131
Field Parameters136
Field Parameter Settings Via Diggimec or Via Smart View136
I>, I>>, I>>> - Phase Overcurrent Protection138
Functionality139
Phase Overcurrent Protection - Settings141
Phase Overcurrent Protection - Settings Via Diggimec or Via Smart View142
IH2 - Inrush Blocking144
Functionality145
Inrush - Settings146
Inrush - Settings Via Diggimec or Via Smart View146
Commissioning: Inrush147
IG>, IG>> - Earth (Ground) Overcurrent Protection148
Functionality149
Earth (Ground) Overcurrent Protection - Settings150
Earth (Ground) Overcurrent Protection - Settings Via Diggimec or Via Smart View151
I2/I1> - Unbalanced Load [46]153
Functionality154
Current Unbalance Protection - Settings Via Diggimec or Via Smart View155
I2> - Negative-Sequence Current Protection [51Q]156
Functionality157
Settings Via Diggimec or Via Smart View158
Thr - Thermal Overload [49]160
Functionality161
Thermal Overload - Settings Via Diggimec or Via Smart View162
Ipeak> - Peak Overcurrent Protection163
Functionality164
Ipeak> - Settings165
Ipeak> - Settings Via Diggimec or Via Smart View165
SOTF - Switch Onto Fault166
SOTF - Settings Via Diggimec or Via Smart View168
Exp - External Protection169
Functionality170
External Protection - Settings Via Diggimec or Via Smart View171
CBF - Circuit Breaker Failure [50BF, 62BF]172
Principle - General Use172
States / Standby173
Functionality173
Integrated Backup Phase Overcurrent Protection174
Activation of the Backup Protection175
Supervision176
TCM" - Trip Circuit Monitoring [74TC]176
Fault Recorder177
5.1 Fault Display Screen (Overlay / Pop-Up) on the Diggimec180
Content of a Fault Record181
How to Read out the Fault Recorder182
Self-Supervision183
Device Start (Reboot)184
Self-Supervision Messages185
Commissioning187
Commissioning / Protection Test188
Special Features of the WIC1 Test189
Selection of the Secondary Test System189
Measurement of the Resistive Burden190
Checks During Commissioning190
Test Windings, Test Sockets190
Wiring Checks192
Self-Supervision Contact for the WIC1-4193
WIC1 Settings193
Functional Test193
Test Currents194
Pickup Thresholds for the Phase Overcurrent Stage I195
Pickup Thresholds for the Short-Circuit (Phase Overcurrent) Stage I196
Special Features for Tests of Calculated Ground (Earth) Overcurrent197
Tripping Thresholds for the Calculated Ground Overcurrent Stage IG198
Putting out of Operation - Plug out the Relay200
Restart of the WIC1200
Measuring the Trip Delay201
Servicing and Maintenance203
Technical Data204
Technical Data - WIC1204
Climatic and Environmental Data204
Housing204
Degree of Protection en 60529205
Phase Current Measurement206
Ground Current Measurement206
Leds207
Power Supply207
Outputs207
Impulse Output for the Tripping Coil208
Impulse Output for a Flag Indicator208
Relay Ouput (WIC1-4)209
Remote (External) Trip Input / Digital Input (WIC1-1, WIC1-2, WIC1-3)209
Digital Inputs (WIC1-4)210
Smart View Connections210
Self-Supervision Messages211
Standards212
9.1.13.1 Design Standards212
Tolerances / Accuracy - WIC1213
Protection Elements Accuracy213
Phase Overcurrent Protection213
Ground (Earth) Overcurrent Protection215
Unbalanced Load [46], Negative-Sequence Current Protection [51Q]217
Peak Overcurrent Protection218
Inrush Blocking219
Switch Onto Fault (SOTF)219
Thermal Overload Protection220
External Protection220
Measured Trip Times (Fn = 50 Hz, 1-/3-Phase)221
Technical Data - Diggimec223
Climatic and Environmental Data223
Housing223
Degree of Protection en 60529224
Voltage Supply224
Binary Output Relays225
Technical Data - WIC1 Cts226
Technical Data - WIC1 Cts, Construction Type 1226
Technical Data - WIC1 Cts, Construction Type 2226
Test Windings, Test Sockets228
Technical Data - WI1SZ4229
Technical Data - WI1SZ5230
Troubleshooting231
In Case You Need to Contact Our Service-Team231
Self-Supervision Messages232
Self-Supervision - Error Messages233
Self-Supervision - Warning Messages234
Self-Supervision - Information Messages236
Signals Via Leds (at WIC1 or Diggimec)237
Problems with the Device239
Hardware239
Operation of the Device241
Parameter Settings242
Protection and Control243
Communication244
Appendix246
Appendix - Settings Via DIP / HEX Switches246
Settings Via DIP Switches (WIC1-2)246
Settings Via HEX Switches (WIC1-3)250
Setting of the Rated CT Current in254
DIP-/HEX-Switch Settings for CT Types W2, WE2255
11.1.3.2 DIP-/HEX-Switch Settings for CT Type W3256
11.1.3.3 DIP-/HEX-Switch Settings for CT Type W4257
11.1.3.4 DIP-/HEX-Switch Settings for CT Type W5258
11.1.3.5 DIP-/HEX-Switch Settings for CT Type W6259
Phase Overcurrent Protection - Settings Via DIP Switches (WIC1-2) or Via HEX Switches (WIC1-3)260
Earth (Ground) Overcurrent Protection - Settings Via DIP Switches (WIC1-2) or Via HEX Switches (WIC1-3)265
Inrush - Settings Via DIP Switches (WIC1-2) or Via HEX Switches (WIC1-3)267
Ipeak> - Settings Via DIP Switches (WIC1-2) or Via HEX Switches (WIC1-3)270
Appendix - Time Overcurrent Characteristics271
Characteristics (I>, I>>, I>>>)271
DEFT - Definite Time-Overcurrent (I>, I>>, I>>>)273
Inverse-Time Characteristics (I>, I>>, I>>>)275
Characteristics (IG>, IG>>)289
DEFT - Definite Time-Overcurrent (IG>, IG>>)291
Inverse-Time Characteristics (IG>, IG>>)293
Characteristics "I2308
DEFT - Definite Time-Overcurrent ("I2>")310
Inverse-Time Characteristics ("I2>")312
Index326

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Brand	Seg
Model	WIC1-3
Category	Relays
Language	English

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