ABB RELION RET670, Operator'S Manual

Page: 13 / 128

Differential protection ..................................................................75
Impedance protection..................................................................76
Current protection........................................................................76
Voltage protection .......................................................................76
Frequency protection...................................................................76
Multipurpose protection ..............................................................76
Scheme communication .............................................................76
Secondary system protection .....................................................76
Control ........................................................................................77
Monitoring....................................................................................77
Logic............................................................................................77
Function status.................................................................................77
Overview......................................................................................77
Differential protection...................................................................77
Transformer differential protection, two winding
T2WPDIF ...............................................................................77
Transformer differential protection, three winding
T3WPDIF ...............................................................................78
Restricted earth fault protection, low impedance
REFPDIF ...............................................................................78
High impedance differential protection HZPDIF ....................78
Impedance protection..................................................................78
Full-scheme distance protection, mho characteristic
ZMHPDIS...............................................................................78
Distance protection zone, quadrilateral characteristic
ZMQPDIS, ZMQAPDIS..........................................................78
Distance protection zone, quadrilateral characteristic
ZMCPDIS, ZMCAPDIS...........................................................79
Distance protection zone, quadrilateral characteristic,
separate settings ZMRPDIS, ZMRAPDIS..............................79
Fullscheme distance protection, quadrilateral for earth
faults ZMMPDIS, ZMMAPDIS ...............................................79
Faulty phase identification with load enchroachment
FMPSPDIS ............................................................................80
Phase selection with load encroachment FDPSPDIS............80
Phase selection, quadrilateral characteristic with
settable angle FRPSPDIS......................................................80
Phase preference logic PPLPHIZ...........................................80
Directional impedance ZDRDIR ............................................80
Directional impedance element for mho characteristic
ZDMRDIR...............................................................................80
Directional impedance quadrilateral, including series
compensation ZDSRDIR........................................................81
Additional distance protection directional function for
earth faults ZDARDIR ............................................................81
Table of contents
7
Operator's manual