ABB RELION 620 Series Technical Manual page 37

620 series
Technical Manual
Settings....................................................................................1088
Monitored data.........................................................................1089
Technical revision history........................................................ 1089
Voltage variation PHQVVR...........................................................1089
Identification............................................................................ 1089
Function block......................................................................... 1090
Functionality............................................................................ 1090
Operation principle.................................................................. 1090
Phase mode setting............................................................1091
Variation detection..............................................................1091
Variation validation............................................................. 1093
Duration measurement.......................................................1096
Three/single-phase selection variation examples.............. 1097
Recorded data......................................................................... 1099
Application............................................................................... 1101
Signals.....................................................................................1103
Settings....................................................................................1104
Monitored data.........................................................................1105
Technical data......................................................................... 1108
Voltage unbalance VSQVUB .......................................................1108
Identification............................................................................ 1108
Function block......................................................................... 1108
Functionality............................................................................ 1109
Operation principle.................................................................. 1109
Application............................................................................... 1114
Signals.....................................................................................1115
Settings....................................................................................1115
Monitored data.........................................................................1116
Technical data......................................................................... 1117
Section 11 General function block features................................. 1119
Definite time characteristics..........................................................1119
Definite time operation.............................................................1119
Current based inverse definite minimum time characteristics...... 1122
IDMT curves for overcurrent protection................................... 1122
Standard inverse-time characteristics................................ 1126
User-programmable inverse-time characteristics............... 1141
RI and RD-type inverse-time characteristics...................... 1141
Reset in inverse-time modes................................................... 1145
Inverse-timer freezing..............................................................1154
Voltage based inverse definite minimum time characteristics...... 1155
IDMT curves for overvoltage protection...................................1155
Standard inverse-time characteristics for overvoltage
protection............................................................................1157
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