Bay control QCBAY................................................................76
Logical node for interlocking SCILO ...........................................78
Switch controller CSWI................................................................79
Switch controller SCSWI........................................................ 79
Bay reserve function QCRSV......................................................82
Logical nodes for conversion functions............................................ 84
Integer to Boolean converter FCVB.............................................84
Integer to Boolean 16 conversion with logic node
representation ITBGAPC........................................................84
Boolean to integer converter FCVI.............................................. 85
Boolean 16 to Integer conversion with logic node
representation BTIGAPC........................................................85
Logical nodes for protection functions.............................................. 86
Differential protection PDIF......................................................... 86
Transformer differential protection, two winding T2WPDIF ...86
Transformer differential protection, three winding
T3WPDIF ...............................................................................90
Low impedance restricted earth fault protection REFPDIF ... 94
Generator differential protection GENPDIF ...........................95
1Ph High impedance differential protection HZPDIF .............98
Busbar differential protection, 2 zones, three phase
BCZSPDIF .............................................................................99
Line differential protection, 3 CT sets, 23 line ends
L3CPDIF ..............................................................................100
Line differential protection, 6 CT sets, 35 line ends
L6CPDIF ..............................................................................103
Line differential protection 3 CT sets, with inzone
transformers, 23 line ends LT3CPDIF .................................106
Line differential protection 6 CT sets, with inzone
transformers, 35 line ends LT6CPDIF .................................109
Additional security logic for differential protection RGFC.......... 112
Additional security logic for differential protection LDRGFC 112
Distance protection PDIS.......................................................... 114
Phase selection with load encroachment, quadrilateral
characteristic FDPSPDIS..................................................... 114
Faulty phase identification with load encroachment
FMPSPDIS........................................................................... 117
Loss of excitation LEXPDIS................................................. 118
Distance protection zone, quadrilateral characteristic
ZMQPDIS............................................................................. 120
Distance protection zone, quadrilateral characteristic
ZMQAPDIS...........................................................................121
Table of contents
2
670 series 2.1 IEC
Communication protocol manual
