Siemens siprotec SJ62 User Manual page 368

Connection Exam-
ples for 7SJ63
Connection Exam-
ples for 7SJ64
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Connection examples for current and voltage transformer circuits are provided in Ap-
pendix A.3. The device can either be connected with three phase–ground voltages
(connection mode VT Connect. 3ph = Van, Vbn, Vcn), or with two phase–phase
voltages and V (also called the displacement voltage) from open delta VTs as (con-
delta
nection mode VT Connect. 3ph = Vab, Vbc, VGnd). For the latter, only two
phase–phase voltages or the displacement voltage V
device settings the appropriate voltage connection must be entered under address
213, in P.System Data 1.
As the voltage inputs of the 7SJ63 device have an operating range from 0 to 170 V,
this means that phase-to-phase voltages can be assessed in connection of phase-to-
ground voltages up to √3 · 170 V = 294 V, in the latter case up to 170 V.
If there is only one voltage transformer on the system side, wiring is performed accord-
ing to examples on single-phase connection. For this case, address 240 VT
Connect. 1ph in the P.System Data 1 specifies to the device which primary
voltage is connected to which analog input.
Connection examples for current and voltage transformer circuits are provided in Ap-
pendix A.3.
For the normal connection the 4th voltage measuring input is not used. Correspond-
ingly the address 213 must be set to VT Connect. 3ph = Van, Vbn, Vcn. The
factor in address 206Vph / Vdelta must however be set to 1.73 (this factor is used
internally for the conversion of measurement and fault recording 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 „Transforma-
tion 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 paragraph.
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 VT Connect. 3ph = Van,Vbn,Vcn,VGn.
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 206Vph /
Vdelta must however be set to 1.73 (this factor is used internally for the conversion
of measurement and fault recording values).
Also two phase–phase voltages or the displacement voltage V
to the device. Here address 213 must be set to VT Connect. 3ph = Vab, Vbc,
VGnd. For the latter, only two phase–phase voltages or the displacement voltage V
can be connected.
As the voltage inputs of the 7SJ64 device have an operating range from 0 to 200 V,
this means that when connecting to the device phase-to-ground voltages, the phase-
to-phase voltages can be assessed up to √3 · 200 V = 346 V, with connection of phase-
to-phase voltages up to 200 V.
If there is only one voltage transformer on the system side, wiring is performed accord-
ing to examples on single-phase connection. For this case, address 240 VT
Connect. 1ph in the P.System Data 1 specifies to the device which primary
voltage is connected to which analog input.
3.1 Mounting and Connections
can be connected. In the
delta
can be connected
delta
delta
366