Function-Group Type Voltage/current 1-Phase
Overview
In the Voltage-current 1-phase function group, all functions can be used for protecting and for monitoring a
protected object or equipment which allow a 1-phase current and voltage measurement or a zero-sequence
voltage measurement via a 3-phase voltage measuring point. The function group also contains the operational
measurement for the protected object or equipment (on this topic, see chapter
Values, and Supervision of the Primary System
Structure of the Function Group
The Voltage-current 1-phase function group has interfaces to the measuring points and the Circuit-breaker
function group.
[dw1spstr-040117-01.vsd, 1, en_US]
Figure 5-7
Structure of the Voltage-Current 1-Phase Function Group
Interface with Measuring Points
You connect the Voltage-current 1-phase function group to the current and voltage measuring points via the
interfaces to the measuring points. At least one measuring point has to be connected. The other is optional.
This assignment can only be made in DIGSI via Project tree → Function group connections. To connect the
interfaces, set a cross at the intersection between the row and column in the matrix.
The function group has the following interfaces to the measuring points:
•
1-phase current
The 1-phase current measured values are provided via this interface.
You can only connect a 1-phase current measuring point to the 1-phase current interface.
•
Voltage 1-phase or Voltage 3-phase
You can connect the voltage interface of the Voltage-current 1-phase function group with a 1-phase or
a 3-phase measuring point. The calculated zero-sequence voltage or the measured residual voltage are
available for connection with a 3-phase measuring point. The phase-to-ground voltages are not available
in the function group Voltage-current 1-phase. You can use both connection types at the same time.
You configure the 1-phase voltage measuring points via the voltage interface (see the following figure).
5.3
5.3.1
5.3.2
Function-Group Types
5.3 Function-Group Type Voltage/current 1-Phase
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SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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