Siemens 6MD86 - Function-Group Type Voltage 3-Phase; Overview; Structure of the Function Group

Function-Group Type Voltage 3-Phase
Overview
In the Voltage 3-phase function group, all functions can be used for protecting and for monitoring a
protected object or equipment which allows a 3-phase voltage measurement. The function group also
contains the operational measurement for the protected object or equipment (on this topic, see chapter
9 Measured Values, Energy Values, and Supervision of the Primary System). Applicable functions are, for
example, Voltage protection or Frequency protection.
Structure of the Function Group
The Voltage 3-phase function group has interfaces to the measuring points and the Circuit-breaker function
group.
[dw3spann-300913, 1, en_US]
Figure 5-13 Structure of the Voltage 3-Phase Function Group
Interface with Measuring Points
You connect the Voltage 3-phase function group to the voltage measuring points via the interface to the
measuring points. This assignment can only be made in DIGSI via Project tree → Function group connec-
tions. To connect the interfaces, set a cross at the intersection between the row and column in the matrix.
[sc3span1-190214-01, 1, en_US]
Figure 5-14 Connecting Measuring Points to the Voltage 3-Phase Function Group
If you add functions to the Voltage 3-phase function group, these are connected to the measuring point auto-
matically.
You can connect multiple measuring points with this interface. You can find more information in chapter
5.9 Voltage Measuring-Point Selection.
The measurands from the 3-phase voltage system are supplied via the V 3-ph interface. Depending on the
type of transformer connections, these are, for example, V
A
, V
B
, V
C
, V
gnd
. All values that can be calculated from
the measurands are also provided via this interface.
Interface to the Circuit-Breaker Function Group
All required data is exchanged between the Voltage 3-phase function group and the Circuit-breaker function
group via the interface of the Circuit-breaker function group.
5.4
5.4.1
5.4.2
Function-Group Types
5.4 Function-Group Type Voltage 3-Phase
206 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017