Siemens SIPROTEC 4, User Manual

Page: 366 / 734

Mounting and Connections
General
!
WARNING
Warning of improper transport, storage, installation or assembly of the device.
Failure to observe these precautions can result in death, personal injury, or serious material damage.
²
Trouble-free and safe use of this device depends on proper transport, storage, installation, and
assembly of the device according to the warnings in this device manual.
²
Of particular importance are the general installation and safety regulations for work in a high-voltage
environment (for example, ANSI, IEC, EN, DIN, or other national and international regulations). These
regulations must be observed.
Configuration Information
Prerequisites
For installation and connections the following conditions must be met:
The rated device data have been checked as recommended in the SIPROTEC 4 System Description. It has been
verified that these data comply with the power system data.
General Diagrams
General diagrams for the device family 7SJ62/64 are shown in Appendix B Terminal Assignments . Connection
examples for current and voltage transformer circuits are provided in Appendix C Connection Examples . It
must be checked that the setting configuration of the Power System Data1 (Section 2.1.3.2 Setting Notes )
corresponds with the connections.
Voltage Connection Examples
Connection examples for voltage transformers are provided in Appendix C Connection Examples
The devices 7SJ621 and 7SJ622 have 3 voltage inputs, the devices 7SJ623, 7SJ624, 7SJ625, 7SJ626 and all
7SJ64 variants have 4 voltage inputs.
For the standard connection the 4th voltage measuring input is not used; the address 213
VT Connect.
3ph
=
Van, Vbn, Vcn
must be set accordingly. The factor in address 206
Vph / Vdelta
must however be
set to 1.73 (this factor is used internally for the conversion of measured and fault values).
Also an additional connection example of an e-n-winding of the voltage transformer is shown. Here address
213 must be set to
VT Connect. 3ph
=
Van,Vbn,Vcn,VGn
. The factor address 206
Vph / Vdelta
depends on the transformation ratio of the e–n-winding. For additional hints, please refer to section
2.1.3.2 Setting Notes under “Transformation Ratio”.
Another figure shows an example of a connection of the e–n winding of a set of voltage transformers, in this
case, however of a central set of transformers at a busbar. For more information refer to the previous para-
graph.
Another figure shows an example of the connection of a different voltage, in this case the busbar voltage (e.g.
for the synchronization function). For the synchronization function, address 213 must be set to
Van,Vbn,Vcn,VSy
.
Balancing V1/V2
, address 6X21, is always equal to 1 unless the feeder VT and
busbarside VT have a different transformation ratio. The factor in address 206
Vph / Vdelta
must however
be set to 1.73 (this factor is used internally for the conversion of measurement and fault recording values).
Two phase–phase voltages or the displacement voltage V
delta
can also be connected to the device. Here the
address must be set to 213
VT Connect. 3ph
=
Vab, Vbc, VGnd
. For the latter setting, only two phase–
phase voltages or only the displacement voltage V
delta
can be connected.
3.1
3.1.1
Mounting and Commissioning
3.1 Mounting and Connections
366 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016