REJ 523 Technical Reference Manual ABB Substation Automation
Products and Systems
MRS750940-MUM
2
Contents
1 Introduction.................................................................................................4
1.1 About this manual..............................................................................4
1.2 The use of the relay...........................................................................4
1.3 Features.............................................................................................4
1.4 Guarantee..........................................................................................5
2 Safety information.......................................................................................6
3 Instructions .................................................................................................7
3.1 Application.........................................................................................7
3.2 Requirements ....................................................................................7
3.3 Configuration .....................................................................................8
4 Technical description ..................................................................................9
4.1 Functional description........................................................................9
4.1.1 Product functions......................................................................9
4.1.1.1 Schema of product functions ...........................................9
4.1.1.2 Overcurrent....................................................................10
4.1.1.3 Inputs.............................................................................10
4.1.1.4 Outputs..........................................................................10
4.1.1.5 Circuit-breaker failure protection....................................10
4.1.1.6 Disturbance recorder .....................................................10
4.1.1.7 MMI module...................................................................11
4.1.1.8 Self-supervision.............................................................11
4.1.2 Configuration ..........................................................................12
4.1.3 Protection ...............................................................................13
4.1.3.1 Overcurrent unit.............................................................13
4.1.3.2 Time/current characteristics...........................................14
4.1.3.3 Settings..........................................................................23
4.1.3.4 Technical data of protection functions............................30
4.1.4 Monitoring...............................................................................31
4.1.5 Self-supervision (IRF).............................................................31
4.1.6 I/O test....................................................................................32
4.1.7 Disturbance recorder ..............................................................32
4.1.7.1 Function.........................................................................32
