•
Voltage
The measurands of the 3-phase voltage system or 1-phase voltage are supplied via this interface.
Depending on the connection type of the transformers, in the 3-phase voltage system these are for
example, V
A
, V
B
, V
C
of the line or feeder.
The connection to the corresponding measuring point is necessary only if a user function that needs the
measurand of the 3-phase voltage system is used, for example, to make use of the Synchronization or
Automatic reclosing function.
•
Sync voltage
A 1-phase synchronization voltage (for example, voltage of the busbar with a 1-phase connection) or a 3-
phase synchronization voltage (for example, voltage of the busbar with a 3-phase connection) is supplied
via this interface.
The connection to the corresponding measuring point is necessary only if synchronization is used.
Interface with Protection-Function Groups
All required data is exchanged between the Protection and Circuit-breaker function groups via the interface
with the Protection function group. This data includes, for example, the pickup and operate indications of the
protection functions sent in the direction of the circuit-breaker function group and, for example, the circuit-
breaker condition information in the direction of the protection function groups.
If an application template is used, the function groups are connected to each other because this connection is
essential to ensure proper operation. You can modify the connection using the Function group connections
editor in DIGSI 5.
You can find more detailed information in the chapter 2.1 Function Embedding in the Device.
If this link is missing, DIGSI 5 reports an inconsistency.
Besides the general assignments of the Protection-function group or groups to the Circuit-breaker function
groups, you can also configure the interface for certain functionalities in detail.
•
Which operate indications of the protection functions are included when the trip command is generated?
•
Which protection functions activate the Automatic reclosing function?
•
Which protection functions activate the Circuit-breaker failure protection function?
You can find more detailed information about this configuration in chapter 2.1 Function Embedding in the
Device.
Application and Setting Notes
Interface with Measuring Points
The interface with the 3-phase power system must have been configured. Otherwise, DIGSI 5 reports an
inconsistency.
If the Synchronization function is used, the measuring points that represent voltages V1 and V2 of the parts
of the power system to be synchronized must be connected.
You can find more detailed information in the chapter Synchronization 6.4.1 Overview of Functions.
The Automatic reclosing function provides the auxiliary functions Dead-line check and Reduced dead time.
For these auxiliary functions, the 3-phase voltage system has to be measured. If you want to use these auxil-
iary functions, the measuring point of the 3-phase voltage system must be connected to the Voltage function
group interface. This link is also necessary if the Automatic reclosing function with adaptive dead time
function type is used.
Interface with Protection-Function Groups
The Line protection-function group is linked to 2 circuit breakers (2 Circuit-breaker function groups) for 1 1/2
circuit-breaker layouts.
Parameter: Rated normal current for % values
•
Default setting (_:2311:101) Rated normal current = 1.000 A
5.6.3
Function-Group Types
5.6 Function-Group Type Circuit Breaker, 1-/3-Pole
SIPROTEC 5, High-Voltage Bay Controller, Manual 229
C53000-G5040-C015-9, Edition 11.2017
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