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dropout time, or the last value received can be retained (Hold setting). This can be configured separately for
each received signal (see
NOTE
i
i
For ACT type signals, only the phase information is transmitted.
Indications that are transferred data fields of priority 1 are sent with every telegram. They are preferably used
for the transmission of rapid signals, for example, release for circuit-breaker intertripping. A strictly determin-
istic, rapid transmission is required there.
Signals of priority 2 are transmitted with at least every 2nd telegram. For bit rates >256 kbit/s, there are no
differences between priority 1 and priority 2.
Priority 3 information is transmitted at least every 100 ms. This priority is used for transmission of measured
and metered values. Complex values must be routed separately as the real and the imaginary part for trans-
mission. Measured-value thresholds that lead to an updating of a measured value are set centrally as a prop-
erty of the measured value. These measured-value thresholds apply with the corresponding reporting, for
example, also for the transfer via IEC 61850 to a substation automation technology.
Indications which are written to a data area x under a priority on the data bar must be routed to an indication
of the same type in the device reading this information. Otherwise, they are processed incorrectly on the
receiving side. The data bar is organized in terms of bits. For information on the bit requirement of each signal
type, refer to
Table
Table 3-14
and
rate.
NOTE
i
i
The Lowest appearing bit rate parameter, which has to be set in each device for the protection
interfaces of a topology, defines the number of data areas as well as the topology type.
If, for example, in a three-end constellation with a type 2 chain topology two devices are connected via direct
optical fibers and 2 devices via the 64-kbit/s weakest line, the 64-kbit/s section is the limiting factor for the
entire constellation.
Table 3-14
Type 1
Type 2
Table 3-15
Type 1
Type 2
Table 3-16
Signal Type
SP (single-point indication)
DP (double-point indication)
IN (metered values)
MW (measured values)
ACT
8
The complex phasors of a measuring point are pre-routed
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Table
3-17).
3-16.
Table 3-15
show the number of data areas in the data bar in relation to the available baud
Available Bits - Minimum Constellation Baud Rate 64/128 kbit/s
Priority 1
8 bits
32 bits
Available Bits - Minimum Constellation Baud Rate 512/2048 kbit/s
Priority 1
48 bits
96 bits
Requirement in Bits
8
Priority 2
24 bits
64 bits
Priority 2
128 bits
200 bits
Size in Bits
1 bit
2 bits
32 bits
32 bits
4 bits
System Functions
3.5 Protection Communication
Priority 3
128 bits
256 bits
Priority 3
384 bits
1024 bits
113
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