Siemens Siprotec 7VK61 Manual page 181

Further figures show examples for the additional connection of a different voltage, in this case the busbar
voltage (e.g. for voltage protection or synchronism check). For the voltage protection the address 210 U4
transformer = Ux transformer has to be set,U4 transformer = Usy2 transf. for the synchronism
check. The address 215 Usy1/Usy2 ratio is only then not equal to 1 when feeder transformer and busbar
transformer have a different transformation ratio. .
If there is a power transformer between the set of busbar transformers and the set of feeder transformers, the
phase displacement of the voltages for the synchronism check (if used) caused by the transformer has to be
taken into consideration. In this case also check the addresses 212 Usy2 connection, 214 ϕ Usy2-Usy1
and 215 Usy1/Usy2 ratio. You will find detailed notes and an example in Section 2.1.3.1 under „Voltage
connection".
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 A.4 of
the Appendix. Check also whether the labelling corresponds to the allocated indication functions.
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 available. 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 sufficient since the binary
input „>Set Group Bit1", which is not assigned, is considered to be not controlled.
• The status of the signals controlling the binary inputs to activate a particular setting group must remain con-
stant 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 con-
nection diagrams for the two binary inputs are illustrated in the following Figure. 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).
Where:
no
yes
Table 3-1
>Set Group Bit 0
Not energized
Energized
Not energized
Energized
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
= not activated
= activated
Changing setting groups with binary inputs
Binary Input
>Set Group Bit 1
Not energized
Not energized
Energized
Energized
Mounting and Commissioning
3.1 Mounting and Connections
Active settings group
Group A
Group B
Group C
Group D
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