ABB Relion 670 Series Technical Reference Manual page 28

Table of contents
22
Input and output signals..................................................................826
Setting parameters..........................................................................827
Technical data.................................................................................827
Direct transfer trip logic.........................................................................828
Introduction......................................................................................828
Low active power and power factor protection LAPPGAPC
(37_55).............................................................................................829
Introduction.................................................................................830
Principle of operation..................................................................830
Function block............................................................................832
Input and output signals.............................................................832
Setting parameters.....................................................................833
Technical data............................................................................834
Compensated over and undervoltage protection COUVGAPC
(59_27).............................................................................................834
Introduction.................................................................................834
Principle of operation..................................................................835
Function block............................................................................837
Input and output signals.............................................................837
Setting parameters.....................................................................838
Technical data............................................................................839
Sudden change in current variation SCCVPTOC (51)....................839
Introduction.................................................................................840
Principle of operation..................................................................840
Function block............................................................................841
Input and output signals.............................................................841
Setting parameters.....................................................................841
Technical data............................................................................842
Carrier receive logic LCCRPTRC (94).............................................842
Introduction.................................................................................842
Principle of operation..................................................................842
Function block............................................................................843
Input and output signals.............................................................843
Setting parameters.....................................................................844
Technical data............................................................................844
Negative sequence overvoltage protection LCNSPTOV (47)..........844
Introduction.................................................................................844
Principle of operation..................................................................845
Function block............................................................................845
Input and output signals.............................................................845
Technical reference manual