2.1 General
37
7UT613/63x Manual
C53000-G1176-C160-2
Parameter Group
Changeover Func-
tion
If the parameter group changeover function is desired, address
103
Grp Chge
OPTION
should be set to
Enabled
. In this case, it is possible to apply up to four dif-
ferent groups of settings for the function parameters. During normal operation, a con-
venient and fast switch-over between these setting groups is possible. The setting
Disabled
implies that only one function parameter setting group can be applied and
used.
Protected Object
The definition of the
PROT. OBJECT
(address
105
) is important for the correct assign-
ment of the setting parameters and the possible inputs and outputs and functions of
the device. This object is defined as the main protected object which is intended to be
protected by the differential protection. It should be mentioned here that further parts
of the power plant can be protected by other part functions if not all measured current
inputs of the device are necessary for the differential protection of the main protected
object. The settings for the protected object and the following protection functions are
irrespective of how the protection functions act on the protected object and which
measuring locations (current transformers) are available.
• Normal Power transformers with separate windings are set as
PROT. OBJECT
=
3
phase transf.
regardless of the number of windings, vector groups and the
earthing conditions of the starpoints. This is also valid if a neutral earthing reactor
is situated within the protected zone. If the differential protection shall cover a gen-
erator or motor and a unit-connected power transformer (also with more than 2
windings), the protected object is also declared as transformer protection.
• For
PROT. OBJECT
=
1 phase transf.
phase input L2 is not connected. This
option is suited especially to single-phase power transformers with 16.7 Hz (traction
transformers). Single-phase transformers are generally treated as three-phase
protected objects.
• g60For auto-transformers select
PROT. OBJECT
=
Autotransf.
, regardless
whether the auto-transformer has one or more further separate windings. This
option is also applicable for shunt reactors if current transformers are installed at
both sides of the connection points.
• If three single-phase auto-transformers are arranged as a power transformer bank
(see figure 2-1), the connections of the starpoint leads of the windings are accessi-
ble and often provided with current transformers. Here, it is possible, instead of a
normal transformer differential protection via an entire power transformer bank, to
realise three single-phase current comparison circuits via each auto transformer
winding. In figure 2-1 the protected zone of each phase is shaded.
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 ...
