Siemens Reyrolle 7SR46 - Page 10

4.5 51N Time-Delayed Earth Fault – Derived............................................................................66
4.6 50LC/SOTF Switch onto Fault............................................................................................ 67
4.7
81HBL2 2
nd
Harmonic Block/Inrush Restraint......................................................................68
5 Applications................................................................................................................................................69
5.1 Overview ......................................................................................................................... 70
5.2 Specific CTs.......................................................................................................................71
5.2.1 Overview.....................................................................................................................71
5.3 Time-Delayed Overcurrent (51/51N) ................................................................................. 74
5.4 Overcurrent Characteristics............................................................................................... 76
5.4.1 Selection of Overcurrent Characteristics ...................................................................... 76
5.4.2 Reset Delay .................................................................................................................76
5.5 Instantaneous Overcurrent (50/50N) ................................................................................ 77
5.6 Inrush Detector (81HBL2) .................................................................................................78
5.7 Connection Examples........................................................................................................79
5.7.1 Connection Examples for RMU Application................................................................... 79
5.7.2 Connection Examples for Distribution Transformer Application.....................................80
Index...........................................................................................................................................................83
Table of Contents
10 Reyrolle, 7SR46 Device, Manual
C53000-G7040-C103-1, Edition 10.2022