Technical Data
10.1 General Device Data 456
10.2 21LB Load Blinder 457
10.3 24 Overexcitation Protection 459
10.4 27 Undervoltage Protection – 3-Phase 461
10.5 27Vx Undervoltage Protection – Vx 462
10.6 37 Undercurrent Protection – Phase 463
10.7 37G Undercurrent Earth Fault – Measured 464
10.8 46 Negative-Sequence Overcurrent Protection 465
10.9 46BC Broken Conductor Detection 467
10.10 47 Sequence Overvoltage Protection 468
10.11 49 Thermal Overload Protection 470
10.12 50 Instantaneous Overcurrent – Phase 473
10.13 50BF Circuit-Breaker Failure Protection – 3 Pole 474
10.14 50G Instantaneous Earth Fault – Measured 477
10.15 50N Instantaneous Earth Fault – Calculated 478
10.16 51 Time-Delayed Overcurrent – Phase 479
10.17 51G Time-Delayed Earth Fault – Measured 481
10.18 51N Time-Delayed Earth Fault – Calculated 483
10.19 51V Voltage-Dependent Overcurrent – Phase 485
10.20 59N Neutral Voltage Displacement 486
10.21 59Vx Overvoltage Protection – Vx 488
10.22 60CTS‑I CT Supervision – Current Reference 489
10.23 60VTS VT Supervision 490
10.24 67 Directional Overcurrent – Phase 491
10.25 67G Directional Earth Fault – Measured 492
10.26 67GS Directional Sensitive Earth Fault – Measured 493
10.27 67N Directional Earth Fault – Calculated 494
10.28 81 Frequency Protection – "f>" or "f<" 495
10.29 81HB2 Inrush Current Detection 496
10.30 81HB5 Overfluxing Detection – 5th Harmonic 497
10.31 87GH Restricted Earth-Fault Protection – High-Impedance 498
10.32 87T‑BD Transformer Differential Protection – Biased 499
10.33 87T‑HS Transformer Differential Protection – Highset 500
10
Reyrolle 7SR5, Transformer Protection Device, Device Manual 455
C53000-G7040-C015-1, Edition 11.2019
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