Siemens SIPROTEC 4 7UT6 Series Manual page 44

Functions
2.1 General
NOTE
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When configuring the topology proceed exactly in the order given below. Some of the following settings
and setting possibilities depend on settings performed before. In DIGSI the tabs (setting sheets) under
Power System Data 1 should be edited from the left tab to the right.
First of all, number the sides of the main protected object consecutively, next number the measuring loca-
tions, beginning with those for the main object, then for the remaining. In the example
2 sides S1 and S2, the 5 measuring locations are M1 to M5.
The following sequence of sides is advised:
•
For power transformers, start with the higher voltage side, as well for generator/transformer units or
motor/transformer units.
•
For auto-transformers, the common winding must be declared as side 1 and side 2, further taps shall
follow (if applicable), then a delta winding (if applicable). Side 5 is not permitted here.
•
For generators, start with the terminal side.
•
For motors and shunt reactors, start with the current supply side.
•
For series reactors, lines, and busbars, there is no preferred side.
Side determination plays an important role for all of the following settings.
Proceed to number the measuring locations, beginning with those which are assigned to the main protected
object. Take the order of side numbering, next the non-assigned measuring locations (if used). Refer also to
Figure 2-2 geschehen ist.
Proceed numbering the auxiliary measuring locations (1-phase), again in the order: assigned locations and
then further (if used).
NOTE
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The determination of the sides and measuring locations is imperative for all further setting steps. It is also
important that the currents from the measuring locations (current transformers) are connected to the asso-
ciated analogue current inputs of the device: The currents of measuring location M1 must be connected to
the device at measuring locations Ι
The topological data can be altered only with a PC using DIGSI.
Global Data for 3-Phase Measuring Locations
Determine the total number of 3-phase current measuring locations (= connected current transformer sets)
which are connected to the device. Enter this number in address 211 No Conn.MeasLoc (number of meas-
uring locations connected). 7UT612 allows a maximum number of 2, 7UT613 and 7UT633 allow a maximum
number of 3, 7UT635 a maximum of 5 measuring locations. The examples in
contain 5 measuring locations each.
The number of 3-phase measuring locations assigned to the main protected object are set in address 212 No
AssigMeasLoc (number of assigned measuring locations). Of course, this number cannot be higher than
that of address 211. The difference No Conn.MeasLoc – No AssigMeasLoc is the number of non-assigned
three-phase measuring locations. Both examples in
phase measuring locations: M1 to M4. M5 is a non-assigned measuring location.
The number of sides associated with the main protected object is set in address 213 NUMBER OF SIDES. In
the example Figure
S1 and S2. In the example
number of sides is 3. In case of an auto-transformer, a maximum of 4 sides is permissible (see below).
Of course, the number of sides can be equal to the number of measuring locations (but never greater). The
example in Figure 2-4
side. In this example: No AssigMeasLoc = 3 and NUMBER OF SIDES = 3.
No distinction between sides and measuring locations is made in case of a busbar. Both correspond to the
feeders. Therefore, address 213 is missing if address 105 PROT. OBJECT = 3ph Busbar has been set.
44
, Ι , Ι
L1M1 L2M1
2-2, the protected object is a power transformer with 2 windings; the number of sides is 2:
Figure 2-3, the main protected object is a power transformer with 3 windings; the
shows a three-winding power transformer with one set of current transformers at each
(in single-phase transformers Ι
L3M1
Figure 2-2 and Figure 2-3
C53000-G1176-C230-5, Edition 09.2016
(Figure 2-2) there are
), is omitted!
L2M1
Figure 2-2 and Figure 2-3
show five of the four assigned 3-
SIPROTEC 4, 7UT6x, Manual