Siemens SIPROTEC 7SS525 V3.3

Table of Contents
xiv
7SS52 V4 Manual
C53000-G1176-C182-3
8 Maintenance and Repair.................................................................................................................. 289
8.1 Maintenance ..................................................................................................................... 290
8.2 Fault Analysis ..................................................................................................................... 292
8.2.1 Evaluation of Operational Events ....................................................................................... 292
8.2.2 Checking the Auxiliary Voltage Supply............................................................................... 293
8.2.3 Checking the LEDs on the Modules ................................................................................... 293
8.2.4 Analysis of Internal Communication Failures...................................................................... 295
8.3 Troubleshooting.................................................................................................................. 299
8.4 Repair................................................................................................................................. 302
8.4.1 Replacing the Buffer Battery...............................................................................................303
8.4.2 Replacing the Fine-Wire Fuse ............................................................................................ 306
8.4.3 Startup with a Defective Bay Unit / Defective Fiber-Optic Cable........................................ 309
9 Technical Data.................................................................................................................................. 311
9.1 General Data ...................................................................................................................... 312
9.2 General Device Data ..........................................................................................................313
9.2.1 Analog Inputs and Outputs ................................................................................................. 313
9.2.2 Rated Auxiliary Voltage ...................................................................................................... 313
9.2.3 Binary Inputs....................................................................................................................... 314
9.2.4 Alarm Contacts ................................................................................................................... 314
9.2.5 Trip Contacts ...................................................................................................................... 315
9.2.6 Light Emitting Diodes.......................................................................................................... 315
9.2.7 Operation, Displays ............................................................................................................ 315
9.2.8 Serial Ports ......................................................................................................................... 316
9.2.9 Busbar Protection ............................................................................................................... 317
9.2.10 Circuit Breaker Failure Protection....................................................................................... 318
9.2.11 Overcurrent Protection in the Bay Unit ............................................................................... 319
9.2.12 Auxiliary Functions.............................................................................................................. 321
9.2.13 User-Configurable Functions (CFC) ................................................................................... 322
9.2.14 Electrical Tests ................................................................................................................... 323
9.2.15 Mechanical Tests................................................................................................................ 325
9.2.16 Climatic Stress Tests.......................................................................................................... 326
9.2.17 Service Conditions.............................................................................................................. 327
9.2.18 Design Versions.................................................................................................................. 327
9.2.19 MCBs for Device 7SS52x ................................................................................................... 328
9.3 Dimensions......................................................................................................................... 329
9.3.1 Central Unit......................................................................................................................... 329
9.3.2 Bay Unit .............................................................................................................................. 331
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