Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
496
3.1
Mounting and Connections
General
WARNING!
Warning of improper transport, storage, installation, and application of the device.
Non-observance can result in death, personal injury or substantial property damage.
Trouble free and safe use of this device depends on proper transport, storage, installation, and application of
the device according to the warnings in this instruction manual.
Of particular importance are the general installation and safety regulations for work in a high-voltage environ-
ment (for example, VDE, IEC, EN, DIN, or other national and international regulations). These regulations must
be observed.
3.1.1
Configuration Information
Prerequisites
For installation and connections the following conditions must be met:
The rated device data has been tested as recommended in the SIPROTEC 4 System Description and their
compliance with the Power System Data is verified.
Connection Variants
General Diagrams are shown in Appendix A.2. Connection examples for current transformer and voltage trans-
former circuits are provided in Appendix A.3. It must be checked that the setting of the
P.System Data 1
,
Section 2.1.2.1, was made in accordance to the device connections.
Currents
Appendix A.3 shows current transformer connection examples in dependence on network conditions.
For normal connection, address
220
I4 transformer
=
In prot. line
must be set and furthermore,
address
221
I4/Iph CT
=
1.000
.
When using separate earth current transformers, address
220
I4 transformer
=
In prot. line
must
be set. The setting value of the address
221
I4/Iph CT
may deviate from
1
. For information on the calcula-
tion, please refer to section 2.1.2.1.
Furthermore, examples for the connection of the earth current of a parallel line (for parallel line compensation)
are shown. Address
220
I4 transformer
must be set
In paral. line
here. The setting value address
221
I4/Iph CT
may deviate from
1
. For information on the calculation hints, please refer to Section 2.1.2.1
under „Connection of the Currents“.
The other figures show examples for the connection of the earth current of a source transformer. The address
220
I4 transformer
must be set
IY starpoint
here. Hints regarding the factor
221
I4/Iph CT
can also
be found in Section 2.1.2.1.