3 Mounting and Commissioning
446
7SD5 Manual
C53000-G1176-C169-1
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, instal-
lation, 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 environment (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 nominal device data has been tested as recommended in the SIPROTEC
®
4
System Description and their compliance with these data is verified with the Power
System Data.
Connection
Variants
General Diagrams are shown in Appendix A.2. Connection examples for current trans-
former and voltage transformer 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 ac-
cordance to the device connections.
Currents In Appendix A.3 examples for the possibilities of the current transformer connections
in dependence on network conditions are displayed.
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 factor 221 I4/Iph CT may deviate from 1. For
calculation hints, please refer to Section 2.1.2.1 at „Current Transformer Connection“.
Please observe that 2-CT-connection is permitted only for isolated or compensated
networks.
Furthermore, examples for the connection of the earth current of a parallel line (for par-
allel line compensation) are displayed. Address 220 I4 transformer must be set
In paral. line here. The factor 221 I4/Iph CT may deviate from 1. For calcu-
lation hints, please refer to Section 2.1.2.1.
The other figures show examples for the connection of the earth current of a source
transformer. 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.
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