Application and Setting Notes for Measuring Point Voltage 1-Phase
(V-1ph)
If you insert a Measuring point V 1-ph in DIGSI 5, you must route a voltage to the measuring point under
Name of the device → Measuring-points routing → Voltage-measuring points.
You can route the following voltages:
•
V A
•
V B
•
V C
•
V AB
•
V BC
•
V CA
•
VN
2
•
Vx
•
VN broken-delta
3
Parameter: Rated primary voltage
•
Default setting
(_:2311:101) Rated primary voltage
=
400.000 kV
The
Rated primary voltage
parameter is used to set the primary rated voltage of the voltage trans-
former.
If you change the setting of the parameter
Rated primary voltage
, for example, from 400.000 kV to
300.000 kV using the operation panel, restart the device to ensure that the change of the voltage transformer
ratios was accepted.
Parameter: Rated secondary voltage
•
Default setting
(_:2311:102) Rated secondary voltage
=
100 V
The
Rated secondary voltage
parameter is used to set the secondary rated voltage of the voltage trans-
former.
Parameter: Matching ratio Vph / VN
•
Default setting
(_:2311:108) Matching ratio Vph / VN
=
1.73
With the parameter
Matching ratio Vph / VN
, you set the deviation between the calculated zero-
sequence voltage and the residual voltage measured directly via a measuring input.
You can find more detailed information in chapter
5.6 Application and Setting Notes for Measuring Point
i
i
NOTE
The
Matching ratio Vph / VN
parameter is only visible in the Measuring point V 1-ph if the voltage
VN broken-delta
has been routed.
Parameter: Tracking
•
Default setting
(_:2311:103) Tracking
=
inactive
5.7
2
If you route this voltage, the protection functions operate with the neutral-point displacement voltage.
3
If you route this voltage, the protection functions operate with the voltage measured directly at the broken-delta winding of the voltage
transformer.
Power-System Data
5.7 Application and Setting Notes for Measuring Point Voltage 1-Phase (V-1ph)
122
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Summary of Contents for SIPROTEC 5
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