Siemens SIPROTEC 4 7UT6 Series - Page 12

3.2 Checking Connections.....................................................................................................349
3.2.1 Checking Data Connections of Interfaces................................................................... 349
3.2.2 Checking the System Connections............................................................................. 351
3.3 Commissioning............................................................................................................... 354
3.3.1 Test Mode / Transmission Block..................................................................................355
3.3.2 Test Time Synchronisation Interface...........................................................................355
3.3.3 Testing the System Interface......................................................................................355
3.3.4 Checking the switching states of the binary Inputs/Outputs........................................357
3.3.5 Checking the Setting Consistency.............................................................................. 359
3.3.6 Secondary Tests.........................................................................................................365
3.3.7 Circuit Breaker Failure Protection Tests.......................................................................370
3.3.8 Symmetrical, Primary Current Tests on the Protected Object.......................................372
3.3.9 Zero Sequence Current Tests on the Protected Object.................................................378
3.3.10 Current Tests for Busbar Protection............................................................................ 383
3.3.11 Testing of the Non-Assigned 1-Phase Current Inputs.................................................. 385
3.3.12 Checking the Voltage Connections and Polarity Check................................................386
3.3.13 Testing User-defined Functions..................................................................................390
3.3.14 Stability Check and Triggering Oscillographic Recordings............................................391
3.4 Final Preparation of the Device........................................................................................393
4 Technical Data.......................................................................................................................................... 395
4.1 General...........................................................................................................................396
4.1.1 Analogue Inputs........................................................................................................ 396
4.1.2 Auxiliary Voltage....................................................................................................... 396
4.1.3 Binary Inputs and Outputs .........................................................................................397
4.1.4 Frequency Measurement via the Positive Phase-sequence Voltage U1.........................398
4.1.5 Communications Interfaces....................................................................................... 399
4.1.6 Electrical Tests...........................................................................................................403
4.1.7 Mechanical Tests....................................................................................................... 405
4.1.8 Climatic Stress Test....................................................................................................405
4.1.9 Service Conditions..................................................................................................... 406
4.1.10 Construction .............................................................................................................406
4.2 Differential Protection..................................................................................................... 408
4.3 Restricted Earth Fault Protection......................................................................................414
4.4 Time Overcurrent Protection for Residual Current............................................................ 416
4.5 Time Overcurrent Protection for Earth Current.................................................................428
4.6 Dynamic Cold Load Pickup for Time Overcurrent Protection............................................. 430
4.7 Single-Phase Time Overcurrent Protection....................................................................... 431
4.8 Unbalanced Load Protection............................................................................................432
4.9 Thermal Overload Protection...........................................................................................440
4.10 RTD-Boxes for Overload Detection................................................................................... 443
4.11 Overexcitation Protection................................................................................................444
4.12 Reverse Power Protection................................................................................................ 446
4.13 Forward Power Supervision............................................................................................. 447
4.14 Undervoltage Protection................................................................................................. 449
4.15 Overvoltage Protection....................................................................................................450
Table of Contents
12 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016