ABB REX 521 Technical Reference Manual, General

1MRS 751108-MUM
REX 521
11
Protection Relay
Technical Reference Manual, General
For more information, see REX 521 Technical Reference Manual, Standard
Configurations (see “Related documents” on page 7).
Control functions
I<->O CB1COCB1 xxx xxxxxxxxx
I<->O IND1COIND1 xxx xxxxxxxxx
I<->O IND2COIND2 xxx xxxxxxxxx
I<->O IND3 COIND3
x
5
I<->O POSCOLOCAT xxx xxxxxxxxx
ALARM1-8MMIALAR1-8 xxx xxxxxxxxx
Measurement functions
3I MECU3A xxx xxxxxxxxx
Io MECU1A xxx xxxxxxxxx
Uo MEVO1A x xxxxxxxxx
DREC MEDREC xxx xxxxxxxxx
3U MEVO3A xxxxxxxx
3U_B MEVO3B x
f MEFR1 xxxxxxxx
PQE MEPE7 xxxxxxxx
AI1 MEAI1 x
Condition monitoring functions
CB wear CMBWEAR1 xxx xxxxxxxxx
TCS1 CMTCS1 xxx xxxxxxxxx
MCS 3I CMCU3 xxx xxxxxxxxx
MCS 3U CMVO3 xxxxxxxx
TIME1 CMTIME1 x
Power quality monitoring functions
PQ 3Inf PQCU3H xxx xxxxxxxxx
PQ 3Unf PQVO3H xxxxxxxx
Standard functions
SWGRP xxx xxxxxxxxx
1. H01 available only with sensor version of REX 521
2. Configured fixedly to the I
0
(1/5 A) channel or Ios if selected
3. Can be used as Io>, Io>> and Io>>> or Uo>, Uo>> and Uo>>> function block with some limitations
4. 3I>-> and 3I>>-> cannot be set to operate as 3I>, 3I>> or 3I>>>
5. Motor status indication
6. H08 available only with VT version of REX 521. VTs are used to measure phase-to-earth voltages.
Calculated phase-to-phase voltages shown by 3U_B
Note! Calculated Uo (Uos) used in Sensor versions of H01 and H03 configurations.
Calculated Io (Ios) also available in H01-H05, H08 configurations
HW versions (Continued) Basic Medium High/Sensor
Standard configurations
B01 B02 M01 M02 H01
1
H02 H03 H04 H05 H06 H07 H08
6
Function
blocks
FB name
(in CD-ROM)
IEEE
device
number

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English