Siemens Reyrolle 7SR54 - Page 17

10.3 24 Overexcitation Protection...........................................................................................459
10.3.1 Common Settings......................................................................................................459
10.3.2 Definite Time Element (24DT)....................................................................................459
10.3.3 Inverse Time Element (24IT)...................................................................................... 459
10.4 27 Undervoltage Protection – 3-Phase ............................................................................ 461
10.4.1 Common Settings......................................................................................................461
10.4.2 Undervoltage Protection............................................................................................ 461
10.5 27Vx Undervoltage Protection – Vx ................................................................................ 462
10.5.1 Common Settings......................................................................................................462
10.5.2 Undervoltage Protection............................................................................................ 462
10.6 37 Undercurrent Protection – Phase ............................................................................... 463
10.6.1 Common Settings......................................................................................................463
10.6.2 Undercurrent Protection............................................................................................ 463
10.7 37G Undercurrent Earth Fault – Measured.......................................................................464
10.8 46 Negative-Sequence Overcurrent Protection.................................................................465
10.8.1 Definite Time Element (46DT)....................................................................................465
10.8.2 Inverse Time Element (46IT)...................................................................................... 465
10.9 46BC Broken Conductor Detection...................................................................................467
10.9.1 Common Settings......................................................................................................467
10.9.2 Broken Conductor Detection...................................................................................... 467
10.10 47 Sequence Overvoltage Protection...............................................................................468
10.10.1 Common Settings......................................................................................................468
10.10.2 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
10.13.1 50BF Circuit‑Breaker Failure Protection – 3 Pole......................................................... 474
10.13.2 50BF‑I4 Circuit‑Breaker Failure Protection – 3 Pole......................................................475
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
10.20.1 Common Settings......................................................................................................486
10.20.2 Definite Time Element (59NDT)................................................................................. 486
10.20.3 Inverse Time Element (59NIT)....................................................................................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
Table of Contents
Reyrolle 7SR5, Transformer Protection Device, Device Manual 17
C53000-G7040-C015-1, Edition 11.2019