Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
362
3.1 Mounting and Connections
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, ANSI, IEC, EN, DIN, or other national and international regulations). These regulations must
be observed.
3.1.1 Configuration Information
Prerequisites
For mounting and connection, the following requirements and conditions must be met:
The rated device data has been checked as recommended in the SIPROTEC 4 System Description /1/ and
their compliance with these data is verified with the Power System Data.
Connection Options
Overview diagrams are shown in Appendix A.2. Connection examples for current and voltage transformer cir-
cuits are given in Appendix A.3. It must be checked that the setting configuration of the Power System Data
1, Section 2.5, corresponds with the connections.
Currents/Voltages
Connection diagrams are shown in the Appendix. Examples show connection options for current and voltage
transformers with busbar connection (address 272 SCHEME = Busbar) and unit connection (address 272 =
Unit transf.) can be found in Appendix A.3. In all examples, the CT starpoints point towards the protected
object so that addresses 201 STRPNT->OBJ S1 and 210 STRPNT->OBJ S2 must be set to YES.
In the connection examples, the U
E
input of the device is always connected to the open delta winding of a
voltage transformer set. Accordingly address 223 UE CONNECTION must be set to broken delta.
A standard connection where one busbar is fed by several generators can be found in Appendix, A.3. The earth
fault current can be increased by an earthing transformer connected to the busbar (approx. 10 A max.), allowing
a protection range of up to 90 % to be achieved. The earth current is measured using the toroidal current trans-
former to achieve the necessary sensitivity. During startup of the machine, the displacement voltage can be
used as a criterion for detecting an earth fault until synchronization is completed.
Factor 213 FACTOR IEE2 considers the transformation ratio between the primary and the secondary side of
the summation current transformer when the sensitive current input of side 2 in the corresponding connection
example is used. Accordingly, when the input of side 1 is used, 205 FACTOR IEE1 applies.
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