ABB Relion 670 Series Technical Reference Manual page 21

Technical reference manual
Design........................................................................................563
Function block.................................................................................565
Input and output signals..................................................................565
Setting parameters..........................................................................565
Technical data.................................................................................566
Section 10 Multipurpose protection.....................................................567
General current and voltage protection CVGAPC................................567
Introduction......................................................................................567
Principle of operation.......................................................................567
Measured quantities within CVGAPC.........................................567
Base quantities for CVGAPC function........................................570
Built-in overcurrent protection steps...........................................570
Built-in undercurrent protection steps.........................................576
Built-in overvoltage protection steps...........................................577
Built-in undervoltage protection steps........................................577
Logic diagram.............................................................................577
Function block.................................................................................583
Input and output signals..................................................................584
Setting parameters..........................................................................585
Technical data.................................................................................593
Section 11 Secondary system supervision..........................................597
Current circuit supervision CCSRDIF (87)............................................597
Introduction......................................................................................597
Principle of operation.......................................................................597
Function block.................................................................................599
Input and output signals..................................................................599
Setting parameters..........................................................................600
Technical data.................................................................................600
Fuse failure supervision SDDRFUF......................................................600
Introduction......................................................................................601
Principle of operation.......................................................................601
Zero and negative sequence detection......................................601
Delta current and delta voltage detection...................................605
Dead line detection.....................................................................607
Main logic...................................................................................607
Function block.................................................................................611
Input and output signals..................................................................611
Setting parameters..........................................................................612
Technical data.................................................................................613
Table of contents
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