ABB REG650 Technical Manual page 9

Technical Manual
Function block.............................................................................96
Signals.........................................................................................96
Settings........................................................................................97
Monitored data.............................................................................97
Operation principle......................................................................97
Logic diagram.........................................................................97
Technical data.............................................................................98
Generator differential protection GENPDIF .....................................98
Identification................................................................................98
Functionality................................................................................99
Function block...........................................................................100
Signals.......................................................................................100
Settings......................................................................................101
Operation principle....................................................................102
Function calculation principles.............................................103
Fundamental frequency differential currents........................103
Supplementary criteria.........................................................108
Harmonic restrain.................................................................111
Cross-block logic scheme....................................................111
Simplified block diagrams.....................................................111
Technical data...........................................................................114
Section 6 Impedance protection...................................................117
Underimpedance protection for generators and transformers
ZGPDIS..........................................................................................117
Identification..............................................................................117
Functionality..............................................................................117
Function block...........................................................................118
Signals.......................................................................................118
Settings......................................................................................119
Operation principle....................................................................119
Full scheme measurement...................................................119
Impedance characteristic.....................................................120
Basic operation characteristics.............................................120
Theory of operation..............................................................121
Technical data...........................................................................123
Loss of excitation LEXPDIS............................................................123
Identification..............................................................................123
Functionality..............................................................................123
Function block...........................................................................124
Signals.......................................................................................124
Settings......................................................................................125
Operation principle....................................................................125
Technical data...........................................................................129
Table of contents
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