Table of Contents
Advertisement
Table of Contents
3.4.6
Checking the Stator Earth Fault Protection ........................................................................ 374
3.4.6.1
Unit Connection .................................................................................................................. 375
3.4.6.2
Busbar Connection ............................................................................................................. 378
3.4.7
Testing the 100-% Stator Earth Fault Protection ............................................................... 382
3.4.8
for Rotor Earth Fault Protection .......................................................................................... 384
3.4.9
Checking the Rotor Earth Fault Protection During Operation............................................. 384
3.4.9.1
Rotor Earth Fault Protection (R, fn) .................................................................................... 384
3.4.9.2
Rotor Earth Fault Protection (1 to 3 Hz) ............................................................................. 385
3.4.10
Tests with the Generator Connected to the Network.......................................................... 386
3.4.10.1 Checking the Correct Connection Polarity.......................................................................... 386
3.4.10.2 Measurement of Motoring Power (Reverse Power) and Angle Error Correction................ 386
3.4.10.3 Calibrating the Reverse Power Protection.......................................................................... 387
3.4.10.4 Checking the Underexcitation Protection............................................................................ 388
3.4.10.5 Checking the Directional Function of the Overcurrent Time Protection.............................. 389
3.4.11
Triggering Oscillographic Recordings................................................................................. 389
3.5
Final Preparation of the Device .......................................................................................... 391
4
Technical Data.................................................................................................................................. 393
4.1
General Device Data .......................................................................................................... 395
4.1.1
Analog Inputs...................................................................................................................... 395
4.1.2
Power Supply...................................................................................................................... 396
4.1.3
Binary Inputs and Outputs .................................................................................................. 396
4.1.4
Communications Interfaces ................................................................................................ 397
4.1.5
Electrical Tests ................................................................................................................... 401
4.1.6
Mechanical Stress Tests..................................................................................................... 403
4.1.7
Climatic Stress Tests .......................................................................................................... 403
4.1.8
Service Conditions.............................................................................................................. 404
4.1.9
Certifications ....................................................................................................................... 404
4.1.10
Construction........................................................................................................................ 405
4.2
Definite-Time Overcurrent Protection (ANSI 50, 67) .......................................................... 406
4.3
Inverse-Time Overcurrent Protection (ANSI 51, 67)........................................................... 407
4.4
Thermal Overload Protection (ANSI 49) ............................................................................. 412
4.5
Unbalanced Load (Negative Sequence) Protection (ANSI 46)........................................... 414
4.6
Startup Overcurrent Protection (ANSI 51) .......................................................................... 416
4.7
Differential Protection for Generators and Motors (ANSI 87G/87M)................................... 417
4.8
Differential Protection for Transformers (ANSI 87T)........................................................... 419
4.9
Earth Current Differential Protection (ANSI 87GN/TN)....................................................... 422
4.10
Underexcitation (Loss-of-Field) Protection (ANSI 40)......................................................... 423
4.11
Reverse Power Protection (ANSI 32R)............................................................................... 424
4.12
Forward Power Supervision (ANSI 32F)............................................................................. 425
xii
7UM62 Manual
C53000-G1176-C149-3
Advertisement
Table of Contents
