Technical Data
This chapter provides the technical data of the device SIPROTEC 7SJ80 and its individual functions, including
the limit values that may not be exceeded under any circumstances. The electrical and functional data for the
maximum functional scope are followed by the mechanical specifications with dimensioned drawings.
4.1 General Device Data 354
4.2 Definite-time Overcurrent Protection 363
4.3 Inverse-time Overcurrent Protection 365
4.4 Directional Overcurrent Protection 376
4.5 Inrush Restraint 378
4.6 Dynamic Cold Load Pickup 379
4.7 1-phase Overcurrent Protection 380
4.8 Voltage Protection 381
4.9 Negative Sequence Protection (definite-time characteristic) 383
4.10 Negative Sequence Protection (inverse-time characteristics) 384
4.11 Frequency Protection 81 O/U 390
4.12 Undervoltage-controlled reactive power protection (27/Q) 391
4.13 Thermal Overload Protection 393
4.14 Ground Fault Detection (Sensitive/Insensitive) 395
4.15 Intermittent Ground Fault Protection 401
4.16 Directional intermittent ground fault protection 402
4.17 Automatic Reclosing 403
4.18 Fault Locator 404
4.19 Breaker Failure Protection 50BF 405
4.20 Flexible Protection Functions 406
4.21 Synchrocheck 25 409
4.22 User-defined Functions (CFC) 411
4.23 Auxiliary Functions 416
4.24 Switching Device Control 421
4.25 Dimensions 422
4
SIPROTEC 4, 7SJ80, Manual 353
E50417-G1140-C343-A8, Edition 12.2017
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