Siemens SIPROTEC 7SS525 V3.3 User Manual

Table of Contents
xiii
7SS52 V4 Manual
C53000-G1176-C182-3
6.4 Feeder Shutdown and Commissioning............................................................................... 244
6.5 Maintenance Mode.............................................................................................................247
6.6 Plant Visualization .............................................................................................................. 249
7 Installation and Commissioning .................................................................................................... 255
7.1 Installation and Commissioning.......................................................................................... 256
7.1.1 Central Unit ........................................................................................................................ 256
7.1.2 Bay Unit.............................................................................................................................. 257
7.1.3 General Information on the 2-Bay Bus Coupler.................................................................. 258
7.1.3.1 General............................................................................................................................... 258
7.1.3.2 2-Bay Bus Coupler With 2 Current Transformers............................................................... 259
7.1.3.3 2-Bay Bus Coupler With one Current Transformer............................................................. 259
7.1.3.4 Connection ......................................................................................................................... 260
7.2 Checking the Connections.................................................................................................. 261
7.3 Commissioning .................................................................................................................. 262
7.3.1 How to Proceed.................................................................................................................. 263
7.3.2 Web Monitor....................................................................................................................... 264
7.3.2.1 General............................................................................................................................... 264
7.3.2.2 Functions............................................................................................................................ 265
7.3.3 Checking the Switching States of the binary Inputs/Outputs.............................................. 268
7.3.3.1 Central Unit ........................................................................................................................ 268
7.3.3.2 Bay Unit.............................................................................................................................. 271
7.3.4 Testing the System Port ..................................................................................................... 273
7.3.5 Control of the Isolator Replica ............................................................................................275
7.3.6 Switching the Test Mode and the Transmission Block On and OFF.................................. 277
7.4 Checks With Secondary Values......................................................................................... 278
7.4.1 General............................................................................................................................... 278
7.4.2 Trip Characteristic of the Busbar Protection....................................................................... 279
7.4.2.1 busbar-selective Protection ................................................................................................ 279
7.4.2.2 Check Zone ........................................................................................................................ 281
7.4.3 Differential Current Monitoring............................................................................................283
7.4.3.1 busbar-selective Protection ................................................................................................ 283
7.4.3.2 Check Zone ........................................................................................................................ 284
7.4.3.3 Time Delay ......................................................................................................................... 284
7.4.4 Overcurrent Threshold Tripping.......................................................................................... 285
7.4.5 Breaker Failure Protection.................................................................................................. 285
7.4.5.1 Trip Characteristic for Operating Mode “Unbalancing”....................................................... 285
7.4.5.2 Delay Time at Operating Mode “Unbalancing” and “I>Query”............................................ 286
7.4.6 Finishing the Tests with Secondary Values........................................................................ 286
7.5 Checks With Primary Values.............................................................................................. 287
7.5.1 Transformer Polarity........................................................................................................... 287
7.6 Final Check of the Protection ............................................................................................. 288
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Siemens SIPROTEC 7SS525 V3.3 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SS525 V3.3
Category	Power distribution unit
Language	English