Technical data

1MRS751108-MUM
REX 521
81
Protection Relay
Technical Reference Manual, General
14. Index
A
Alarm LEDs .............................................................................................. 45
Activating ........................................................................................... 46
Clearing a certain LED ....................................................................... 46
Reading actual state ............................................................................ 46
Testing ................................................................................................ 46
Alarms
Acknowledging ................................................................................... 45
Clearing, see Acknowledging
Enabling .............................................................................................. 45
Analogue channels .................................................................................... 24
Auxiliary power supplies .......................................................................... 48
Auxiliary voltage .......................................................................... 22, 23, 48
Auxiliary voltage indication .....................................................................23
Auxiliary voltage supply .......................................................................... 22
C
Communication ........................................................................................ 50
Correction parameters and factors ............................................................ 26
Current sensor, see Rogowski coil
Current transformer values ....................................................................... 25
D
Digital inputs ...................................................................................... 27, 48
Filtering .............................................................................................. 27
Inversion ............................................................................................. 28
Testing ................................................................................................ 30
Voltage range ...................................................................................... 23
Display language ...................................................................................... 61
Display panel ............................................................................................ 45
E
Electromagnetic compatibility tests .........................................................49
Energizing inputs ...................................................................................... 48
Environmental conditions ......................................................................... 49
F
Fault indication .........................................................................................34
Fault indications .......................................................................................35
Actions ................................................................................................ 35
Codes .................................................................................................. 35
G
Graphical I/O Setting Tool .......................................................................20