ABB REX 521 - Page 19

1MRS751802-MUM
REX 521
19
Protection Relay
Technical Reference Manual, Standard Configurations
1
H01 available only as sensor version
2
Configured fixedly to the I
0
(1/5 A) channel or Ios if selected
3
3I>-> and 3I>>-> cannot be set to operate as 3I>, 3I>> or 3I>>>
4
Can be used as Io>, Io>> and Io>>> or Uo>, Uo>> and Uo>>> function block with some limitations
5
Motor status indication
6
Calculated Uo (Uos) used in Sensor configurations
7
Calculated Io (Ios) also available
8
Available only as VT version. VTs are used to measure phase-to-earth voltages, calculated
phase-to-phase voltages are shown by 3U_B
AI1 MEAI1 x
Condition monitoring
CB wear CMBWEAR1 x x x x x x x x x x x x x
TCS1 CMTCS1 x x x x x x x x x x x x x
MCS 3I CMCU3 x x x x x x x x x x x x x
MCS 3U CMVO3 x x x x x x x x x
TIME1 CMTIME1 x
Power quality monitoring
PQ 3Inf PQCU3H x x x x x x x x x x x x x
PQ 3Unf PQVO3H x x x x x x x x x
Standard
SWGRP x x x x x x x x x x x x x
Table 2.-1 Standard configurations for REX 521 (Continued)
HW versions Basic Medium High/Sensor
Standard configurations B01 B02 M01 M02
H01
1,6,7
H02
7
H03
6,7
H04
7
H05
7
H06 H07
H08
7,8
H09
7,8
Function
blocks
FB name
(in CD-ROM)
IEEE
device
number
Table 2.-2 Protection functions available in the different standard
configurations of REX 521
Function Description
Is2t n< Three-phase motor start-up supervision
3I> Three-phase non-directional overcurrent protection, low-set stage
3I>> Three-phase non-directional overcurrent protection, high-set stage
3I>>> Three-phase non-directional overcurrent protection, instantaneous stage
3I() Phase reversal protection
Io> Non-directional earth fault protection, low-set stage
Io>> Non-directional earth fault protection, high-set stage
Io>>> Non-directional earth fault protection, instantaneous stage
Io>-> Directional earth fault protection, low-set stage
Io>>-> Directional earth fault protection, high-set stage
Io>>>-> Directional earth fault protection, instantaneous stage
I2> Negative phase sequence protection, low-set stage
I2>> Negative phase sequence protection, high-set stage
3I>-> Three-phase directional overcurrent protection, low-set stage
3I>>-> Three-phase directional overcurrent protection, high-set stage
3I< Three-phase undercurrent protection
3U> Three-phase overvoltage protection, low-set stage
3U>> Three-phase overvoltage protection, high-set stage
3U< Three-phase undervoltage protection, low-set stage