Siemens SIPROTEC 7UT613 series, Руководство пользователя

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3.1 Mounting and Connections
341
7UT613/63x Manual
C53000-G1176-C160-2
With single-phase busbar protection the measuring inputs are each assigned to one
busbar feeder. Appendix A.3 illustrates an example for one phase. The other phases
are to be connected accordingly. Also observe the General Diagrams in annex A.2 that
apply to the current device.
In case of summation CT connection, please note that the rated output current of the
summation transformers is usually 100 mA. The measuring inputs of the device have
to be adjusted accordingly. Consider also that in 7UT613 and 7UT633 only 9 of the
current inputs can be changed to 0.1 A rated input, and in 7UT635 12 current inputs.
Pay attention to the assignment of the different feeder currents to the current inputs of
the device.
The assignment of the 1-phase current inputs must be checked. Connections also
differ according to the application the device is used for. The Appendix A.3 offers some
connection examples. Please refer also to Appendix A.2 for the general diagrams that
apply to this device. Pay attention to the assignment of the different 1-phase measur-
ing locations to the 1-phase measuring inputs of the device. For more details, refer to
subsection 2.1.4.
Also check the rated data and the matching factors of the current transformers.
The allocation of the protection functions to the sides must be consistent. This applies
particularly to the circuit breaker failure protection whose measuring point (side) must
correspond with the side of the circuit breaker to be monitored.
Voltages Voltage measurement is only possible in the appropriate variants of the versions
7UT613 and 7UT633. This paragraph only applies when measured-circuit voltage is
connected to the device and this has been stated in the configuration according to
2.1.4, margin heading „Assignment of Voltage Measuring Inputs“.
In the Appendix A.3 you will find possible examples of the voltage transformer connec-
tion options.
The voltage transformer connections must comply with the settings in paragraph 2.1.4
(margin heading „Assignment of Voltage Measuring Inputs“). Pay attention to the type
of connection of the 4th voltage input U4 if it is used.
Binary Inputs and
Outputs The connections to the power plant depend on the possible allocation of the binary
inputs and outputs, i.e. how they are assigned to the power equipment. The preset al-
location can be found in the tables in Section A.5 of the Appendix. Check also whether
the labelling corresponds to the allocated indication functions.
Here it is also very important that the feedback (auxiliary contacts) used for the
breaker failure protection of the circuit-breaker to be monitored, are connected to the
correct binary inputs which correspond to the assigned side of the circuit breaker
failure protection and the cold load pickup. Similar applies for the manual close recog-
nition of the time overcurrent protection functions.
Changing Setting
Groups If the setting group change-over function is done via binary inputs, please observe the
following:
To enable the control of 4 possible setting groups, 2 binary inputs must be made avail-
able. These have been marked with
„>Set Group Selec.1“
and
„Set Group
Selec.2“
and must be allocated to 2 physical binary inputs so that they can be con-
trolled.
One binary input is sufficient to control 2 setting groups, namely
„>Set Group Se-
lec.1“
, since the non-allocated binary input
„Set Group Selec.2“
is then con-
sidered as not activated.