1MRS751802-MUM
REX 521
17
Protection Relay
Technical Reference Manual, Standard Configurations
2. Introduction
This document provides descriptions of the standard configurations for REX 521.
Section 3 describes the features of the different standard configurations one by one
while sections 4 to 6 describe the signal routings and functionality. A short
introduction of the function blocks available in different standard configurations of
REX 521 is given in Chapter 7. Function block descriptions. Chapter 8. Example
substations, Chapter 9. Application examples, Basic, Chapter 10. Application
examples, Medium, and Chapter 11. Application examples, High present different
application examples.
The standard configurations available are presented in the following table. Note that
in the function block descriptions in the CD-ROM
Technical Descriptions of
Functions
(see Section 1.5. Related documents) the FB names are used instead of the
IEC names.
Hardware (HW) versions for REX 521 are basic, medium, high and sensor. The
sensor variant of the standard configuration is indicated as the letter ‘S’ in the
Config. name
parameter, for example H02S.
Differences between REX 521 and RED 500 platform in the
function block descriptions
The REX 521 and the RED 500 platform differ in some respects concerning the
function block descriptions in the CD-ROM
Technical Descriptions of Functions
(see Section 1.5. Related documents). Firstly, there are some terms that refer to other
products than REX 521. Secondly, there are a few characteristics that appear only in
REX 521:
• Event mask 1 is only for SPA communication.
• The direct control of the auto-reclose function has been disabled.
• Limited number of inputs and outputs are used in standard configurations of
REX 521.
Table 2.-1 Standard configurations for REX 521
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
Protection
3I>
NOC3Low
51
x
x
x
x
x
x
x
x
x
x
x
x
3I>>
NOC3High
50/51
x
x
x
x
x
x
x
x
x
x
x
x
3I>>>
NOC3Inst
50/51
x
x
x
x
x
x
x
x
x
x
x
Io>
NEF1Low
51N
x
x
x
2
x
x
x
x
Io>>
NEF1High
50N/51N
x
x
x
2
x
x
x
x
Io>>>
NEF1Inst
50N
x
x
x
2
x
x
x
Io>->
4
DEF2Low
67N/51N
x
x
x
x
x
x
x
Io>>->
4
DEF2High
67N
x
x
x
x
x
x
x
Summary of Contents for REX 521
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