Siemens SIPROTEC 7UT613 series Manual page 50

2 Functions
Determining the
Topology
50
You have to determine the topology of the main protected object and further objects
(if applicable). The following clarifications are based on the examples given above and
the terminology defined above. Further examples will be given where needed. The
necessary and possible settings depend on the type of main protected object as
defined during configuration of the scope of functions (section 2.1.3).
The measuring locations for a single-phase power transformer are treated like
3-phase measuring locations: From the point of view of measured value conditioning,
the single-phase transformer is handled as a three-phase transformer with missing
phase (L2).
Note
If you have changed the protected object, you will have to check and re-adjust all to-
pological data.
Note
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 locations, beginning with those for the main object, then for the remain-
ing. In the example (Figure 2-2) there are 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 genera-
tor/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.
Proceed numbering the auxiliary measuring locations (1-phase), again in the order:
assigned locations and then further (if used).
7UT613/63x Manual
C53000-G1176-C160-2