3.1 Mounting and Connections
267
7SD610 Manual
C53000-G1176-C145-4
For an additional connection of an e-n-winding of a set of voltage transformers, the
address 210 U4 transformer = Udelta transf. must be set. The setting value
of the address 211 Uph / Udelta depends on the transformation ratio of the e–n-
winding. For additional hints, please refer to Section 2.1.2.1 under “Transformation
Ratio“.
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.4 of the Appendix. Check also whether
the labelling corresponds to the allocated indication functions.
It is also very important that the feedback components (auxiliary contacts) of the circuit
breaker monitored are connected to the correct binary inputs which are assigned for
this purpose.
Changing Setting
Group
If binary inputs are used to change setting groups, please observe the following:
• To enable the control of 4 possible setting groups 2 binary inputs have to be avail-
able. One binary input must be set for „>Set Group Bit0“, the other input for
„>Set Group Bit1“.
• To control two setting groups, one binary input set for „>Set Group Bit0“ is suf-
ficient since the binary input „>Set Group Bit1“, which is not assigned, is con-
sidered to be not controlled.
• The status of the signals controlling the binary inputs to activate a particular setting
group must remain constant as long as that particular group is to remain 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 following Figure 3-1. The Figure illustrates an example in which both Set Group
Bits 0 and 1 are configured to be controlled (actuated) when the associated binary
input is energized (high).
Table 3-1 Changing setting groups with binary inputs
Figure 3-1 Connection diagram (example) for setting group switching with binary inputs
Binary Input Active settings group
>Set Group Bit 0 >Set Group Bit 1
Not energized Not energized Group A
Energized Not energized Group B
Not energized Energized Group C
Energized Energized Group D
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