ABB REG650 - Page 8

Basic part for LED indication module............................................... 60
Identification................................................................................ 60
Function block............................................................................. 60
Signals.........................................................................................61
Settings........................................................................................62
LCD part for HMI function keys control module................................62
Identification................................................................................ 62
Function block............................................................................. 62
Signals.........................................................................................63
Settings........................................................................................63
Operation principle........................................................................... 64
Local HMI.................................................................................... 64
Display....................................................................................64
LEDs.......................................................................................67
Keypad................................................................................... 67
LED..............................................................................................68
Functionality........................................................................... 68
Status LEDs........................................................................... 69
Indication LEDs...................................................................... 69
Function keys.............................................................................. 77
Functionality........................................................................... 77
Operation principle................................................................. 77
Section 6 Differential protection..................................................... 81
Transformer differential protection....................................................81
Functionality ............................................................................... 81
Transformer differential protection, three winding T3WPDIF ..... 82
Identification........................................................................... 82
Function block........................................................................ 82
Signals....................................................................................82
Settings.................................................................................. 83
Monitored data....................................................................... 85
Operation principle...................................................................... 85
Function calculation principles............................................... 86
Fundamental frequency differential currents.......................... 87
Differential current alarm........................................................ 92
Bias current............................................................................ 92
Elimination of zero sequence currents................................... 92
Restrained and unrestrained limits of the differential
protection................................................................................93
Fundamental frequency negative sequence differential
currents.................................................................................. 95
Internal/external fault discriminator........................................ 97
Unrestrained, and sensitive negative sequence protections 100
Table of contents
2
Technical manual