2 Functions
48
7UT613/63x Manual
C53000-G1176-C160-2
Figure 2-2
Example for the terminology of a topology
Sides:
S1
High voltage side of the main protected object (power transformer)
S2
Low voltage side of the main protected object (power transformer)
Measuring locations 3-phase, assigned:
M1
Measuring location, assigned to the main protected object, side 1
M2
Measuring location, assigned to the main protected object, side 1
M3
Measuring location, assigned to the main protected object, side 2
M4
Measuring location, assigned to the main protected object, side 2
Measuring locations 3-phase, non-assigned:
M5
Measuring location, not assigned to the main protected object
Auxiliary measuring locations, 1-phase:
X3
Measuring location, assigned to the main protected object, side 1
X4
Measuring location, not assigned to the main protected object
The auxiliary measuring location
X3
provides the starpoint current of the transformer.
It is assigned to side 1 of the main protected object as an assigned measuring location.
This measuring location can be used by the differential protection function for the for-
mation of the differential current. For the restricted earth fault protection operating at
the higher voltage winding, it can supply the starpoint current of side 1.
The auxiliary measuring location
X4
is not assigned to the main protected object,
because it is not required by the differential protection. It is a non-assigned measuring
location which is used to detect the tank earth fault current and to feed it via the single-
phase measuring input
I
X4 to the single-phase overcurrent protection used for tank
leakage protection. Although tank leakage protection is in a broader sense part of the
transformer protection,
X4
is not assigned to the main protection function because
Summary of Contents for SIPROTEC 7UT613 series
Page 16: ...Contents 16 7UT613 63x Manual C53000 G1176 C160 2 Literature 631 Glossary 623 Index 633 ...
Page 30: ...1 Introduction 30 7UT613 63x Manual C53000 G1176 C160 2 ...
Page 506: ...A Appendix 506 7UT613 63x Manual C53000 G1176 C160 2 7UT633 D E ...
Page 508: ...A Appendix 508 7UT613 63x Manual C53000 G1176 C160 2 7UT633 P Q ...
Page 510: ...A Appendix 510 7UT613 63x Manual C53000 G1176 C160 2 7UT635 D E ...
Page 512: ...A Appendix 512 7UT613 63x Manual C53000 G1176 C160 2 7UT635 P Q ...
Page 515: ...A 2 Terminal Assignments 515 7UT613 63x Manual C53000 G1176 C160 2 7UT633 B ...
Page 517: ...A 2 Terminal Assignments 517 7UT613 63x Manual C53000 G1176 C160 2 7UT633 N ...
Page 519: ...A 2 Terminal Assignments 519 7UT613 63x Manual C53000 G1176 C160 2 7UT635 B ...
Page 521: ...A 2 Terminal Assignments 521 7UT613 63x Manual C53000 G1176 C160 2 7UT635 N ...
Page 622: ...A Appendix 622 7UT613 63x Manual C53000 G1176 C160 2 ...
Page 632: ...Literature 632 7UT613 63x Manual C53000 G1176 C160 2 ...