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Functions
2.1 General
2.1
General
A few seconds after the device is switched on, the initial display appears in the LCD. A selection of measured
values is displayed.
Configuration of the device functions are made via the DIGSI software from your PC. The procedure is de-
scribed in detail in the SIPROTEC 4 System Description. Entry of password No. 7 (for setting modification) is
required to modify configuration settings. Without the password, the settings may be read, but may not be mod-
ified and transferred to the device.
The function parameters, i.e. settings of function options, threshold values, etc., can be entered via the keypad
and display on the front of the device, or by means of a personal computer connected to the front or service
interface of the device utilising the DIGSI software package. The level 5 password (individual parameters) is
required.
2.1.1
Functional Scope
2.1.1.1 Configuration of the Scope of Functions
The 7VK61 relay contains a series of protective and additional functions. The hardware and firmware provided
is designed for this scope of functions. In addition, the command functions can be matched to the system con-
ditions. Individual functions can be activated or deactivated during the configuration procedure. The interaction
of functions may also be modified e.g., the reclosing function can be implemented with or without synchronisa-
tion. If a function is not required, it can be deactivated during configuration.
The available protection and supplementary functions can be configured as Enabled or Disabled. For some
functions, a choice may be presented between several options which are explained below.
Functions configured as Disabled are not processed by the 7VK61. There are no indications, and corre-
sponding settings (functions, limit values) are not displayed during setting.
Note
The functions and default settings available depend on the order variant of the device.
2.1.1.2 Setting Notes
Configuring the functional scope
The scope of functions with the available options is set in the Functional Scope dialog box to match plant re-
quirements.
Most settings are self-explanatory. The special cases are described below.
Special Cases
If use of the setting group changeover function is desired, address 103 Grp Chge OPTION should be set to
Enabled. In this case, up to four different groups of settings may be changed quickly and easily during device
operation (see also Section 2.1.4). With the setting Disabled only one parameter group is available.
Address 106 VT CONNECTION determines how the voltage transformers are connected. VT CONNECTION =
3phase implies that the three phase voltages are connected in wye connection. Select VT CONNECTION =
1phase if the device is connected to only one voltage transformer. In this case, the voltage connected to
24
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
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