referenced to the application. The device can flexibly adapt to various protective objects with varying topolo-
gies; this picks up a flexible adaptation of an operational measured values output. Only operational values
appear that result from the connected measured quantities and that make sense of the configured cases.
A correct display of primary and percentage values requires the complete and correct entry of the topology of
the protected object and its rated values, as well as of the transformer ratings.
For the measuring locations the primary and secondary measured values as per
Depending on the device’s order number, connection type, topology and protection functions configured, only
a part of the magnitudes listed there is available. For single-phase transformers all phase sizes are missing L2.
The powers S, P, Q are calculated from the measuring location to which the voltage transformers are assigned.
If the voltage transformers are assigned to a side of the main protected object, the current sum applies, if the
side has two or more measuring locations. With single-phase busbar protection, power calculation is not
possible.
The definition of the signs is normally that the power flowing into the protective object is considered as posi-
tive: Active components and inductive reactive components in the direction of the protective object are posi-
tive. The same applies for the power factor cos φ. It is occasionally desired to define the power draw from the
protected object (e.g. as seen from the user side of the transformer) positively. Using parameter address 1107
P,Q sign
the signs for these components can be inverted.
For devices without voltage measuring inputs a voltage and apparent power can be issued, if the voltage is
connected to a one-phase current measuring input via an external series resistor. Via a user-configurable CFC
logic (CFC block “Life_Zero”) the current proportional to the voltage can be measured and indicated as voltage
“U
mess
”. For more details on the procedure refer to the CFC manual.
The apparent power S is not a measured value, but a value calculated from the rated voltage of the protected
object which is set and the actually flowing currents of side 1: so
[scheinleistung-3phasig-030603-st, 1, en_GB]
for three-phase application or
[scheinleistung-1phasig-030603-st, 1, en_GB]
for single-phase transformers. If, however, the voltage measurement described in the previous paragraph is
applied, this voltage measurement is used to calculate the apparent power with the currents of side 1. The
apparent power is given as magnitude; it does not contain direction information.
Table 2-12
Operational measured values (magnitudes) of the measuring locations
Measured Values
Primary
Secondary
% referred to
Ι
L1M1,
Ι
L2M1,
Ι
L3M1
Ι
L1M2,
Ι
L2M2,
Ι
L3M2
Ι
L1M3,
Ι
L2M3,
Ι
L3M3
1)
Phase currents at the measuring loca-
tions M1 to M3
1)
A; kA
A
Rated operational current of
the assigned side; if the
measuring location is not
assigned, then
403
..
405
“IN-
BTR PRIM M3..5”
Ι
1M1,
Ι
2M1, 3
Ι
0M1
Ι
1M2,
Ι
2M2, 3
Ι
0M2
Ι
1M3,
Ι
2M3, 3
Ι
0M3
2)
Positive, negative and zero sequence
component of the currents at the
measuring locations M1 to M3
2)
A; kA
A
Ι
L1M4,
Ι
L2M4,
Ι
L3M4
Ι
L1M5,
Ι
L2M5,
Ι
L3M5
1)
5)
Phase currents at the measuring loca-
tions M4 to M5
1)
5)
A; kA
A
Ι
1M4,
Ι
2M4, 3
Ι
0M4
Ι
1M5,
Ι
2M5, 3
Ι
0M5
2)
5)
Positive, negative and zero sequence
component of the currents at the
measuring locations M4 to M5
2)
5)
A; kA
A
Functions
2.22 Auxiliary Functions
SIPROTEC 4, 7UT6x, Manual
279
C53000-G1176-C230-5, Edition 09.2016
Содержание SIPROTEC 4 7UT6 Series
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