ABB RER670 - Example of Analogue Configuration for Railway Applications

Where:
1) shows how to connect the secondary side of the residually connected VT to one VT
input on the IED.
+2U0 shall be connected to the IED
2) is the TRM where this voltage input is located. It shall be noted that for this voltage input
the following setting values shall be entered:
VTprim =132kV
VTsec =100V
Inside the IED, only the ratio of these two parameters is used. It shall be noted that the
ratio of the entered values exactly corresponds to ratio of one individual VT.
3) shows that in this example the first three input channel of the preprocessing block is not
connected in SMT tool or ACT tool.
4) shows the connection made in Signal Matrix Tool (SMT), Application configuration tool
(ACT), which connect this voltage input to the fourth input channel of the preprocessing
function block 5).
5) is a Preprocessing block that has the task to digitally filter the connected analog input
and calculate:
•
fundamental frequency phasors for all four input channels
•
harmonic content for all four input channels
• zero sequence quantities by using the fundamental frequency phasors for the
fourth input channel
These calculated values are then available for all built-in protection and control
functions within the IED, which are connected to this preprocessing function block in the
configuration tool. For this application most of the preprocessing settings can be left to
the default values.
4.2.5 Example of analogue configuration for railway applications
GUID-24D444FE-4930-4519-BADF-E11AD2CD224A v1
Protection and control IED RER670 is designed to be used in two-phase railway
power supply systems. However, it can also be used as a protection and control
device in single-phase railway supply systems with appropriate configuration of the
analogue inputs. Thus, even catenary protection can be arranged. The IED can be
used in railway supply systems with rated frequency of 16.7Hz, 50Hz and 60Hz.
Examples for internal analogue configurations of IED are given in following
sections for some typical installation types used in the railway industry. They shall
be used in order to ensure best possible performance of the IED for particular type
of installation.
The under-impedance protection function is used in all given
examples. However, all other protection and measurement functions
shall be configured in the same way
.
1MRK 506 375-UEN A Section 4
Analog inputs
Railway application RER670 2.2 IEC 59
Application manual