Siemens SIPROTEC 7UT613 series Manual page 51

Global Data for 3-
Phase Measuring
Locations
7UT613/63x Manual
C53000-G1176-C160-2
Note
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 (cur-
rent transformers) are connected to the associated analogue current inputs of the
device: The currents of measuring location M1 must be connected to the device at
measuring locations I
L1M1
ted!
The topological data can be altered only with a PC using DIGSI.
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 connected measuring locations).
7UT613 and 7UT633 allow a maximum number of 3, 7UT635 a maximum of 5 mea-
suring locations. The examples in Figures 2-2 and 2-3 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 the Figures 2-2 and 2-3 show five of the four
assigned 3-phase measuring locations: M1 to M4. M5 is a non-assigned measuring lo-
cation.
The number of sides associated with the main protected object is set in address 213
NUMBER OF SIDES. In the example of figure 2-2, the protected object is a power
transformer with 2 windings; the number of sides is 2: S1 and S2. In the example of
Figure 2-3, the main protected object is a power transformer with 3 windings; the
number of sides is 3. In case of an auto-transformer, a maximum of 4 sides is permis-
sible (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 shows a three-winding power transformer
with one set of current transformers at each 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.
, I , I (in single-phase transformers I
L2M1 L3M1
2.1 General
), is omit-
L2M1
51