Technical data
1MRS751108-MUM
REX 521
15
Protection Relay
Technical Reference Manual, General
For more information, see REX 521 Technical Reference Manual, Standard
Configurations (see “Related documents” on page 10).
Control functions
I<->O CB1 COCB1 COCB1 x x x x x x x x x x x x x x x
I<->O IND1 COIND1 COIND1 x x x x x x x x x x x x x x x
I<->O IND2 COIND2 COIND2 x x x x x x x x x x x x x x x
I<->O IND3 COIND3 COIND3
x
g
x
g
I<->O POS COLOCAT COLOCAT x x x x x x x x x x x x x x x
ALARM1-8 ALARM1-8 MMIALAR1-8 x x x x x x x x x x x x x x x
Measurement
3I 3I MECU3A x x x x x x x x x x x x x x x
Io Io MECU1A xxxx x xxxxxx x x x x
Uo Uo MEVO1A xx x xxxxxx x x x x
DREC DREC MEDREC x x x x x x x x x x x x x x x
3U 3U MEVO3A x x x x x x x x x x x
3U_B 3U_B MEVO3B x x
f f MEFR1 x xxxxxx x x x x
PQE PQE MEPE7 x x x x x x x x x x x
AI1 AI1 MEAI1 x x
Condition monitoring
CB wear1 CB wear1 CMBWEAR1 x x x x x x x x x x x x x x x
TCS1 TCS1 CMTCS1 x x x x x x x x x x x x x x x
MCS 3I MCS 3I CMCU3 x x x x x x x x x x x x x x x
MCS 3U MCS 3U CMVO3 x x x x x x x x x x x
TIME1 TIME1 CMTIME1 x x
Power quality monitoring
PQ 3Inf PQ 3Inf PQCU3H x x x x x x x x x x x x x x x
PQ 3Unf PQ 3Unf PQVO3H x x x x x x x x x x x
Standard
SWGRPSWGRPSWGRP xxxx x xxxxxx x x x x
a. H01 available only as sensor version
b. Not available as sensor version
c. VTs are used to measure phase-to-earth voltages, calculated phase-to-phase voltages are shown by 3U_B
d. Configured fixedly to the Io (1/5 A) channel or Ios if selected
e. Can be used as Io>, Io>> and Io>>> or Uo>, Uo>> and Uo>>> function block with some limitations
f. 3I>-> and 3I>>-> cannot be set to operate as 3I>, 3I>> or 3I>>>
g. Motor status indication
Table 3.2.-1 Standard configurations for REX 521 (Continued)
HW versions Basic Medium High/Sensor
Standard configurations B01 B02 M01 M02
H01
a
H02 H03 H04 H05 H06 H07
H08
bc
H09
bc
H50
b
H51
b
IEC
symbol
ANSI
device
number
FB name
(CD-ROM)
Calculated Uo (Uos) is used in the Sensor versions of H01 and H03
configurations. Calculated Io (Ios) is available in H01-H05, H08,
H09 and H50 configurations.