Section 4
IEC 60870-5-103
4.1
Introduction
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Busbar protection is not one of the types of protection defined in IEC 60870-5-103.
Nevertheless, the commands and signals of the REB500 system are modeled as far as possible
on functions defined in the IEC recommendation. The functional scope of the station protocol
is therefore reduced. The backup protection functions breaker failure, time-overcurrent and
end fault that are optionally available with REB500 are also supported.
According to the IEC recommendation, usage of the private range is only permitted with
regard to the compatibility of existing devices. For this reason, additional REB500 functions
that are not defined in the recommendation were implemented according to the future-
oriented generic part of IEC 60870-5-103.
REB500 also optionally provides a private range.
Refer to IEC 60870-5-103 for an explanation of the various abbreviations.
4.2
General functions
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The tables below define the functional scope of REB500 according IEC 60870-5-103. The
details are to be found in the recommendation itself.
Table 5:
System functions in monitoring direction
INF
Description
GI.
TYPE.
COT
<0>
End of general interrogation (polling)
–
8
10
<0>
Time synchronization
–
6
8
<2>
Reset frame control bit (FCB)
–
5
3
<3>
Reset CU
–
5
4
<4>
Start/restart
–
5
5
<5>
Power on
–
5
6
The information number 0 refers to the global function type and is the same for
all system functions. The information numbers 2 to 5 are used with FUN in
relation to the main function of a protection system.
Table 6:
Status signals in monitoring direction
INF
Description
GI.
TYPE
COT
REB500 signal configuration
<18>
Protection active
x
1
1,9
41810_In service (CU
output)21805_In service (BU
output)
<19>
LED reset
–
1
11
31810_External reset (CU
input)11610_external reset (BU
input)
<20>
Blocks the supervisory
equipment
x
1
9,11
31215_Block.IEC
master_direction (CU input)
1MRK 511 451-UEN Rev. C
Section 4
IEC 60870-5-103
Distributed busbar protection REB500
13
Communication protocol manual IEC 60870-5-103
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