Application And Setting Notes - Siemens SIPROTEC 5 Manual

Operational Measured Values
The operational measured values are always present in the Voltage/current 1-phase function group and
cannot be removed.
The following table shows the operational measured values of the Voltage/current 1-phase function group:
Table 6-2
Measured Values
I 1-phase current
V 1-phase voltage
V Zero-sequence voltage
0
V Residual voltage
N
The operational measured values are explained in more detail in chapter
6.2.3

Application and Setting Notes

Parameter: Rated current
•
Default setting (_:9421:101) Rated current = 1000 A
With the Rated current parameter, you can set the primary rated current. The Rated current specified
here is the reference value for the percentage-measured values and setting values made in percentages.
If the device works with the IEC 61850 protocol, then you change only the setting value of the parameter via
DIGSI 5 and not directly on the device. If you change the setting value directly on the device, then the
IEC 61850 configuration of the metered values can be faulty.
Parameter: Rated voltage
•
Default setting (_:9421:102) Rated voltage = 400.00 kV
With the Rated voltage parameter, you can set the primary rated voltage. The Rated voltage set here is
the reference value for the percentage-measured values and setting values made in percentages.
If the device works with the IEC 61850 protocol, then you change only the setting value of the parameter via
DIGSI 5 and not directly on the device. If you change the setting value directly on the device, then the
IEC 61850 configuration of the metered values can be faulty.
Parameter: Rated apparent power
•
Default setting (_:9421:103) Rated apparent power = 692.82 MVA.
The parameter Rated apparent power is calculated depending on other parameters and cannot be
directly changed.
Parameter: Power-sys. neutral point
•
Default setting (_:9451:149) Power-sys. neutral point = grounded
With the Power-sys. neutral point parameter, you specify whether the system neutral is grounded,
isolated or suppress. coil grounded (grounded via arc-suppression coil). Currently, the parameter
does not affect any protection function; only if the Automatic reclosing function uses the voltage measure-
ment.
Parameter: P, Q sign
•
Default setting (_:9421:150) P, Q sign = not reversed
The power and energy values are defined by the manufacturer such that power in the direction of the
protected object is considered positive. You can also define the power output by the protected object (for
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Operational Measured Values of the Voltage/Current 1-Phase Function Group
Primary
A
kV
kV
kV
6.2 Function-Group Type Voltage/current 1-Phase
Secondary % Referenced to
A Rated operating current of the primary
values
V Rated operating voltage of primary values/√3
V Rated operating voltage of primary values/√3
V Rated operating voltage of primary values/√3
9.3 Operational Measured
Function-Group Types
Values.
143