Parametrization Of The Digital Inputs; Selectors; Reset; Group - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
5.
5.1.
5.1.1.
5.1.2.
5.1.3.
5.1.4.
62
Protection Relay
Technical Reference Manual, Standard Configurations

Parametrization of the digital inputs

Digital inputs can be used for performing different functions like resetting the
desired function block by programming the selectors and switchgroups accordingly.
Digital
PREDELAY
inputs
DI1
.
.
.
INVERSION
DI9
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Selectors

Reset

Selectors Reset 1 and Reset 2 can be programmed to connect any of the inputs
DI1...DI9 to reset the latched trip signal and the recorded data of the functions (e.g.
O/C, E/F, Iub>, 3Ith>, PQ 3Inf

Group

Group is used for switching between the setting groups 1 and 2 of the protection
functions.

Blocking

Selectors BS1 and BS2 can be programmed to block the operation of the functions
(e.g. 3I>, 3I>>, 3I>>> etc.

Disturbance recorder trigger

Any of the inputs DI1...DI9 can be used to start the disturbance recorder to record
measurements.
1. Standard configuration specific
Selectors
Input
Signals
Reset 1
Reset 2
Group
Blocking 1
Blocking 2
DREC trig
PQ 3Inf trig
BACTRL
Master trip
External trip
Lockout reset
Remote
Close enable
Open
Close
CB pos. open
CB pos. close
DC pos. open
DC pos. close
ES pos. open
ES pos. close
Logic input 1
Logic input 2
Logic input 3
1
).
1
).
1MRS 751802-MUM
Output
relays
HSPO 1
PO1
PO2
.
.
.
etc.
Input
SWGRP
Reset 1
O/C
E/F
Iub>
3Ith>
PQ 3Inf
O-->I
Reset 2
etc.