Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
392
3.1
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.
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.
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 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 A.2. Connection examples for current
and voltage transformer circuits are provided in Appendix A.3. It must be checked that the setting configuration
of the
Power System Data1
(Section 2.1.3.2) corresponds with the connections.
Voltage Connection Examples
in Appendix A.3
The devices 7SJ621 and 7SJ622 have 3 voltage inputs, the devices 7SJ623, 7SJ624 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
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 bus-
barside 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).
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