[dw_fgcabsi-201114-01, 2, en_US]
Figure 5-30 Structure of the Capacitor Bank Side Function Group
The Capacitor bank side function group has interfaces to the following components:
•
Measuring points
•
Capacitor bank diff. function group
•
Circuit-breaker function group
Interfaces with Measuring Points
The Capacitor bank side function group receives the required measured values via its interfaces with the
measuring points. If you are using an application template, the Capacitor bank side function group is
connected to the necessary measuring points.
If you add functions to the Capacitor bank side function group, they will automatically receive the measured
values from the correct measuring points. If you add protection functions to the function group but the neces-
sary measuring point is not connected, DIGSI 5 reports an inconsistency. Configure the measuring points in
DIGSI 5 via the Function group connections Editor.
You can find more detailed information in chapter 2 Basic Structure of the Function.
The Capacitor bank side function group has the following interfaces with the measuring points:
•
3-phase current
The measurands from the 3-phase power system are supplied via this interface. Depending on the trans-
former connection type, these are for example: I
A
, I
B
, I
C
, I
N
or 3 I
0
. All values that can be calculated
from the measurands are also provided via this interface. The Capacitor bank side function group must
always be linked to the I-3ph measuring point.
You can connect the 3-phase current interface with a maximum of two 3-phase current measuring
points. If 2 current measuring points have been connected to the 3-phase current interface, the total
current is also determined from measured values from both measuring points in the Capacitor bank side
function group. All functions in the Capacitor bank side function group have access to these values.
•
3-phase voltage (optional):
The measurands from the 3-phase voltage system are supplied via this interface. Different transformer
connection types are possible. All values that can be calculated from the measurands are also provided
via this interface.
The connection of the 3-phase voltage is optional. This connection is necessary only if protection or
supervision functions that require voltage measurements are used.
Function-Group Types
5.5 Function-Group Type Capacitor Bank Differential Protection
230 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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