ABB RELION 620 Series Technical Manual page 32

Table of contents
26
Functionality.................................................................................... 819
Signals.............................................................................................819
Settings............................................................................................820
Technical data................................................................................. 820
Time delay on TON...............................................................................820
Identification.................................................................................... 820
Function block................................................................................. 821
Functionality.................................................................................... 821
Signals.............................................................................................821
Settings............................................................................................822
Technical data................................................................................. 822
Three-phase measurement switching VSWI........................................ 823
Identification.................................................................................... 823
Function block................................................................................. 823
Functionality.................................................................................... 823
Signals.............................................................................................824
Monitored data.................................................................................824
Section 12 General function block features.........................................825
Definite time characteristics..................................................................825
Definite time operation.....................................................................825
Current based inverse definite minimum time characteristics.............. 829
IDMT curves for overcurrent protection........................................... 829
Standard inverse-time characteristics........................................ 834
User-programmable inverse-time characteristics....................... 849
RI and RD-type inverse-time characteristics.............................. 849
Reset in inverse-time modes........................................................... 853
Inverse-timer freezing......................................................................862
Voltage based inverse definite minimum time characteristics.............. 863
IDMT curves for overvoltage protection...........................................863
Standard inverse-time characteristics for overvoltage protection866
User programmable inverse-time characteristics for
overvoltage protection................................................................ 870
IDMT curve saturation of overvoltage protection........................870
IDMT curves for undervoltage protection........................................ 871
Standard inverse-time characteristics for undervoltage
protection....................................................................................871
User-programmable inverse-time characteristics for
undervoltage protection.............................................................. 874
IDMT curve saturation of undervoltage protection......................874
Frequency measurement and protection.............................................. 875
620 series ANSI
Technical Manual