Table 2:
Number of control block data sets and size of data sets
Control Block
Maximum data sets Maximum length
Description
GoCB
4
80 data attributes The protection relays allow a maximum of
four GOOSE control blocks, which
effectively limits the protection relay to four
data sets for GOOSE. The sending GOOSE
data sets can have a maximum total of 80
data attributes. To minimize the message-
handling load in the receiving and sending
protection relays, it is recommended to limit
data attribute amount to 20 per data set.
RCB
10
Edition 1: 256
data attributes
Edition 2: 80 data
objects
The IEC 61850 configuration tool (IET600 or
PCM600) allows a maximum of 10 data sets
for the report control blocks.
SVCB
1
16 data attributes Some protection relay variants allow one
sampled value control block. The sending
sampled value data set has a fixed set of 16
data attributes as defined in IEC 61850-9-2
LE.
4.3.1
Predefined vertical communication data sets
In vertical communications, the protection relay can generate events that are
automatically reported to any listening clients. These communications are configured
via a series of predefined data sets and corresponding report control blocks. The data
sets are used to configure what data is sent and the report control block is used to
configure when data is sent.
The relay connectivity package includes predefined data sets and control blocks for
vertical MMS event reporting. These data sets are used in predefined reporting control
blocks for five clients. The selected data in the data sets is suitable to most of the
different applications and the selected default data automatically considers the used
protection relay type and options.
The data sets and report control blocks can be modified using the IEC 61850
Configuration tool or IET600, however, this should only be done by individuals that
are extremely familiar with both the protection relays and IEC 61850. Inappropriate
modifications can result in misoperation of the protection relay.
•
StatIed – generic status information of IEDs
•
StatIo – inputs, outputs, LEDs
•
StatUrg – measurement limit supervision, control feedback
•
StatNrml – protection start and trip signals, autoreclosing status
•
StatDR – digital fault recorder status
•
MeasReg – registered measurement values at faults
•
MeasFlt – measurements
When function blocks are added to or removed from a relay configuration also the
default data sets and the content of data sets are automatically modified to follow the
1MRS757809 C
Section 4
615 series data model
REC615 and RER615
19
Engineering Guide