ABB REL 501-C1 2.5 Technical Reference Manual page 8

Chapter 5 Current ......................................................................... 103
Instantaneous non-directional overcurrent protection (IOC) ............ 104
Application .................................................................................. 104
Functionality................................................................................ 104
Function block............................................................................. 104
Logic diagram ............................................................................. 106
Input and output signals.............................................................. 106
Setting parameters ..................................................................... 107
Technical data ............................................................................ 107
Definite time non-directional overcurrent protection (TOC) ............. 108
Application .................................................................................. 108
Functionality................................................................................ 108
Function block............................................................................. 109
Logic diagram ............................................................................. 110
Input and output signals.............................................................. 110
Setting parameters ..................................................................... 111
Technical data ............................................................................ 111
Time delayed residual overcurrent protection (TEF) ....................... 112
Application .................................................................................. 112
Functionality................................................................................ 112
Function block............................................................................. 112
Logic diagram ............................................................................. 113
Input and output signals.............................................................. 113
Setting parameters ..................................................................... 114
Technical data ............................................................................ 115
Scheme communication logic for residual
overcurrent protection (EFC) ......................................................... 116
Application .................................................................................. 116
Functionality................................................................................ 116
Function block............................................................................. 116
Logic diagram ............................................................................. 117
Input and output signals.............................................................. 117
Setting parameters ..................................................................... 118
Technical data ............................................................................ 118
Current reversal and weak end infeed logic for
residual overcurrent protection (EFCA) ........................................... 119
Application .................................................................................. 119
Design......................................................................................... 119
Function block............................................................................. 119
Logic diagram ............................................................................. 120
Input and output signals.............................................................. 121
Setting parameters ..................................................................... 121
Technical data ............................................................................ 122
Chapter 6 Voltage ......................................................................... 123
Time delayed undervoltage protection (TUV) .................................. 124
Application .................................................................................. 124
Function block............................................................................. 124
Logic diagram ............................................................................. 125
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