Table 3-14 Available Bits - Minimum Constellation Baud Rate 512/2048 kbit/s
Priority 1 Priority 2 Priority 3
Type 1 48 bits 128 bits 384 bits
Type 2 96 bits 200 bits 1024 bits
Table 3-15 Requirement in Bits
Signal Type Size in Bits
SP (single-point indication) 1 bit
DP (double-point indication) 2 bits
IN (metered values) 32 bits
MW (measured values)
8
32 bits
ACT 4 bits
Table 3-16 Possible Dropout Values
Signal Type Dropout Values
SP (single-point indication) Outgoing, Incoming, Hold
DP (double-point indication) On, Off, Intermediate Position, Disturbed Position,
Hold
IN (metered values) 0, Hold
MW (measured values) 0, Hold
ACT Hold
NOTE
If the protection link fails, these values can be set on the receiver side.
EXAMPLE
2 devices are connected via a 64-kbits channel. This is a type 1 topology. 8 bits are freely available for priority
1. Now, for example, 4 SPS and 2 DPS can be routed:
4 x 1 bit + 2 x 2 bits = 8 bits
NOTE
Measured values are transmitted as primary values.
EXAMPLE
For the rated current display in the receiving device
When I
rated
= 1000 A in the transmitting device and I
Load
= 200 A, the number 200 is displayed in the receiving
device.
Remote Data Transmission: Routing of the Indications and Measured Values to the Protection Interface
The transmission is organized in the form of a data bar which is continuously exchanged between the devices.
For this, see Figure 3-57.
A device indication or measured value is allocated to a definite data area of the bar.
8
The complex phasors of a measuring point are pre-routed
System Functions
3.5 Protection Communication
130 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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