ABB RELION Series Technical Manual page 28

Table of contents
22
Signals.......................................................................................705
Settings......................................................................................705
Monitored data...........................................................................706
Technical data........................................................................... 707
Section 11 General function block features....................................709
Definite time characteristics............................................................709
Definite time operation...............................................................709
Current based inverse definite minimum time characteristics........ 712
IDMT curves for overcurrent protection..................................... 712
Standard inverse-time characteristics.................................. 716
User-programmable inverse-time characteristics................. 731
RI and RD-type inverse-time characteristics........................ 731
Reset in inverse-time modes..................................................... 735
Inverse-timer freezing................................................................744
Voltage based inverse definite minimum time characteristics........ 745
IDMT curves for overvoltage protection.....................................745
Standard inverse-time characteristics for overvoltage
protection..............................................................................747
User programmable inverse-time characteristics for
overvoltage protection.......................................................... 751
IDMT curve saturation of overvoltage protection..................752
IDMT curves for undervoltage protection.................................. 752
Standard inverse-time characteristics for undervoltage
protection..............................................................................753
User-programmable inverse-time characteristics for
undervoltage protection........................................................755
IDMT curve saturation of undervoltage protection............... 756
Frequency measurement and protection........................................756
Measurement modes......................................................................757
Calculated measurements..............................................................759
Section 12 Requirements for measurement transformers..............761
Current transformers...................................................................... 761
Current transformer requirements for overcurrent protection.... 761
Current transformer accuracy class and accuracy limit
factor.................................................................................... 761
Non-directional overcurrent protection................................. 762
Example for non-directional overcurrent protection..............763
Section 13 Protection relay's physical connections........................765
Module slot numbering................................................................... 765
Protective earth connections.......................................................... 766
Binary and analog connections...................................................... 766
Communication connections.......................................................... 766
REC615 and RER615
Technical Manual