ABB REF601 Applications Manual page 8

Table of contents
2
4.2 Earth Fault Protection ................................................................................... 17
4.2.1 Functionality ............................................................................................ 17
4.2.2 Principle of Operation .............................................................................. 17
4.2.3 Setting range of Earth fault Overcurrent Protection ................................ 18
4.3 Three Phase Inrush Detector ....................................................................... 18
4.4 Negative-sequence overcurrent protection .................................................. 19
4.4.1 Functionality ............................................................................................ 19
4.4.2 Principle of Operation .............................................................................. 19
4.5 Phase discontinuity protection ..................................................................... 19
4.5.1 Functionality ............................................................................................ 19
4.5.2 Principle of Operation .............................................................................. 20
4.6 Circuit breaker failure protection .................................................................. 20
4.6.1 Functionality ............................................................................................ 20
4.6.2 Principle of Operation .............................................................................. 21
4.7 Setting groups .............................................................................................. 22
4.8 Auto-reclose function .................................................................................... 23
4.8.1 Functionality ............................................................................................ 23
4.8.2 Principle of operation .............................................................................. 23
4.9 Thermal overload protection ........................................................................ 26
4.9.1 Functionality ............................................................................................ 26
4.9.2 Principle of operation .............................................................................. 26
4.10 Protection characteristics ............................................................................. 31
4.10.1 Time / Current characteristics ................................................................. 31
4.10.2 IEC 60255-3 IDMT characteristic ............................................................ 31
4.10.3 ANSI C37.112 IDMT characteristic ......................................................... 32
4.10.4 RI type characteristic ............................................................................... 32
4.11 Configurable Binary Outputs ........................................................................ 33
4.12 Configurable LED ......................................................................................... 34
4.13 Configurable Binary Inputs ........................................................................... 35
REF601 / REJ601
Application Manual