ABB RED615 Technical Manual page 28

Table of contents
22
Functionality..............................................................................769
Operation principle....................................................................769
Application.................................................................................770
Signals.......................................................................................770
Settings......................................................................................771
Monitored data...........................................................................771
Voltage variation PHQVVR.............................................................772
Identification..............................................................................772
Function block...........................................................................772
Functionality..............................................................................772
Operation principle....................................................................773
Phase mode setting..............................................................773
Variation detection................................................................774
Variation validation...............................................................775
Duration measurement.........................................................778
Three/single-phase selection variation examples................779
Recorded data...........................................................................781
Application.................................................................................783
Signals.......................................................................................785
Settings......................................................................................786
Monitored data...........................................................................787
Section 11 General function block features....................................791
Definite time characteristics............................................................791
Definite time operation...............................................................791
Current based inverse definite minimum time characteristics........794
IDMT curves for overcurrent protection.....................................794
Standard inverse-time characteristics..................................798
User-programmable inverse-time characteristics.................813
RI and RD-type inverse-time characteristics........................813
Reset in inverse-time modes.....................................................817
Inverse-timer freezing................................................................826
Voltage based inverse definite minimum time characteristics........827
IDMT curves for overvoltage protection.....................................827
Standard inverse-time characteristics for overvoltage
protection..............................................................................829
User programmable inverse-time characteristics for
overvoltage protection..........................................................833
IDMT curve saturation of overvoltage protection..................834
IDMT curves for undervoltage protection..................................834
Standard inverse-time characteristics for undervoltage
protection..............................................................................835
User-programmable inverse-time characteristics for
undervoltage protection........................................................837
615 series
Technical Manual