Siemens SIPROTEC 7UT613 series Manual page 306

2 Functions
Table 2-13 Operational measured values (magnitudes) of the sides
IL1S1, IL2S1, IL3S1
IL1S2, IL2S2, IL3S2
IL1S3, IL2S3, IL3S3
1)
I1S1, I2S1, 3I0S1
I1S2, I2S2, 3I0S2
I1S3, I2S3, 3I0S3
2)
IL1S4, IL2S4, IL3S4
IL1S5, IL2S5, IL3S5 1) 3)
I1S4, I2S4, 3I0S4
I1S5, I2S5, 3I0S5
2) 3)
1)
only for 3-phase objects, also for single-phase transformers
2)
only for 3-phase objects, not for single-phase transformers
3)
only for 7UT635
306
In addition to the measured and calculated values at the measuring locations, mea-
sured values are output at the sides of the main protected object. This makes if pos-
sible to obtain the data relevant for the protected object, even if they are fed to the pro-
tected object from several measuring locations, as for example the higher voltage side
(S1) of the transformer. Also, relative values are always referred to a specific side of
the protected object. A current which does not flow into the object from 2 measuring
locations (e. g. a current flowing from one busbar through M1 and M2 to the other
busbar) is theoretically zero because no current flows into the protected object.
Table 2-13 summarizes the operational measured values that are assigned to the
sides. Depending on the device's order number, connection type, topology and pro-
tection functions configured, only a part of the magnitudes listed there is available. The
table does not apply to the single-phase busbar protection, since no sides are defined
there.
Measured Values
Phase currents flowing in from the sides
1)
S1 to S3
Positive, negative and zero sequence
component of the currents at the sides
2)
S1 to S3
Phase currents flowing in from the sides
1) 3)
S4 to S5
Positive, negative and zero sequence
component of the currents at the sides
2) 3)
S4 to S5
The phase angles are listed separately in Table 2-14. The reference value for 3-phase
objects is the current I
thus a phase angle = 0°. With 1-phase busbar protection, the current I
angle 0°, i.e. it is the reference value.
Depending on the device's order number, connection type, topology and protection
functions configured, only a part of the phase angles listed there is available.
The phase angles are indicated in degrees. Since further processing of such values
(in CFC or when transmitted through serial interfaces) requires values without dimen-
sion, arbitrary references have been chosen, which are contained in Table 2-14 in the
column „% conversion".
Primary
A; kA
A; kA
A; kA
A; kA
(current in phase L1 at measuring location M1), which has
L1M1
Secondary % referred to
— Rated operating current of
the respective side
— Rated operating current of
the respective side
— Rated operating current of
the respective side
— Rated operating current of
the respective side
has the phase
1
7UT613/63x Manual
C53000-G1176-C160-2