Siemens SIPROTEC 4 7UT6 Series Manual page 311

only 7, 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 appli-
cation the device is used for. The Appendix
refer also to Appendix
tion to the assignment of the different 1-phase measuring locations to the 1-phase measuring inputs of the
device. For more details, refer to subsection
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
Inputs".
In the Appendix
options.
The voltage transformer connections must comply with the settings in paragraph
(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 allocation can be found in the tables in Section
E Default Settings and Protocol-dependent Functions
sponds 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 recognition 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 available. 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 controlled.
One binary input is sufficient to control 2 setting groups, namely
cated binary input
The control signals must be continuously present in order that the selected setting group remains active.
The following table shows the relationship between binary inputs and the setting groups A to D. Principal
connection diagrams for the two binary inputs are illustrated in the figure below. The figure illustrates an
example in which Set Group Bit 1 and Set Group Bit 2 are configured to be controlled (actuated) when the
associated binary input is energized (high).
Table 3-1
Binary Input
>Set Group Bit 1
no
yes
no
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
B Terminal Assignments
2.1.4 Power System Data
C Connection Examples you will find possible examples of the voltage transformer connection
Set Group Selec.2 is then considered as not activated.
Changing setting groups with binary inputs
>Set Group Bit 2
no
no
yes
C Connection Examples offers some connection examples. Please
for the general diagrams that apply to this device. Pay atten-
2.1.4 Power System Data 1.
1, margin heading "Assignment of Voltage Measuring
of the Appendix. Check also whether the labelling corre-
>Set Group Selec.1 , since the non-allo-
Mounting and Commissioning
3.1 Mounting and Connections
2.1.4 Power System Data 1
Active Group
Group A
Group B
Group C
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