ABB RELION REX640 Technical Manual page 50

Table of contents
44
Settings....................................................................................1649
Monitored data.........................................................................1650
Technical data......................................................................... 1651
Section 11 General function block features................................. 1653
Definite time characteristics..........................................................1653
Definite time operation.............................................................1653
Current based inverse definite minimum time characteristics...... 1656
IDMT curves for overcurrent protection................................... 1656
Standard inverse-time characteristics................................ 1660
User-programmable inverse-time characteristics............... 1675
RI and RD-type inverse-time characteristics...................... 1675
UK rectifier inverse-time characteristic............................... 1679
Reset in inverse-time modes................................................... 1681
Inverse-timer freezing..............................................................1690
Voltage based inverse definite minimum time characteristics...... 1691
IDMT curves for overvoltage protection...................................1691
Standard inverse-time characteristics for overvoltage
protection............................................................................1693
User programmable inverse-time characteristics for
overvoltage protection........................................................ 1697
IDMT curve saturation of overvoltage protection................1698
IDMT curves for undervoltage protection................................ 1698
Standard inverse-time characteristics for undervoltage
protection............................................................................1699
User-programmable inverse-time characteristics for
undervoltage protection......................................................1701
IDMT curve saturation of undervoltage protection............. 1702
Frequency measurement and protection .....................................1702
Frequency adaptivity and generator start-up protection............... 1703
Measurement modes....................................................................1704
Calculated measurements............................................................1706
Test mode.....................................................................................1708
Functionality............................................................................ 1708
Application configuration and Test mode................................ 1709
Control mode........................................................................... 1709
Application configuration and Control mode............................1710
Authorization............................................................................1710
LHMI indications...................................................................... 1711
Section 12 Requirements for measurement transformers............1713
Current transformers.................................................................... 1713
Current transformer requirements for overcurrent protection.. 1713
Current transformer accuracy class and accuracy limit
factor.................................................................................. 1713
REX640
Technical Manual