[dwocpRLC-190813-01.vsd, 3, en_US]
Figure 7-1 Structure/Embedding of the Overcurr. -3ph RLC Function
Function Description
A feature of the Overcurr. -3ph RLC function is the selection of measuring points. A capacitor bank can
include multiple filter circuits. Each filter can include, for example, a 3-phase current measuring device, each
of which is assigned a measuring point. In order to protect the filter circuits, multiple instances of the Over-
curr. -3ph RLC function can be created. Each instance of the function is assigned to a measuring point via the
Measuring-point selection.
The function is structured such that the Measuring-point selection is superordinate to the advanced overcur-
rent-protection stages.
Measuring-Point Selection
With the MP selection parameter, you can select from a list of measuring points a measuring point that is
connected to the I 3ph RLC interface in the Capacitor bank function group. The Overcurr. -3ph RLC function
processes the current that is connected to the measuring point.
For more information, refer to the description of the Capacitor bank function group starting from chapter
5.4.1 Overview.
Selection and Setting of the Rated Current
With the parameter Rated-current selection, you define whether this function uses the rated current
of the whole capacitor bank or the individual rated current of the protected object (for example, reactor or
resistor branch within the capacitor-bank installation) as the reference value for percentage-measured values
and for thresholds set in percentages.
If you select the individual rated current of the protected object as the reference value, set the individual rated
current in the FB General of the Overcurr. -3ph RLC function.
Functional Measured Values
The function provides the connected phase currents as functional measured values for display, further
processing, or transmission to a station.
7.2.2.2
Capacitor Bank Protection
7.2 Overcurrent Protection for Capacitor Banks
970 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
To Next Page
Loading...
