Command Processing
Apart from the synchronization and protection functions as set out above, a control command process is inte-
grated in the SIPROTEC 7VE61 and 7VE63 to coordinate the operation of circuit breakers and other equipment
in the power system. Control commands can originate from four command sources:
•
Local operation using the keypad on the local user interface of the device,
•
Operation using DIGSI,
•
Remote operation via network control center or substation controller (e.g. SICAM)
•
Automatic functions (e.g. using a binary inputs).
The number of switchgear devices that can be controlled is basically limited by the number of available and
required binary inputs and outputs. Therefore, the variant 7VE63 should be the preferred version. For control
purposes it has to be ensured that the corresponding binary inputs and outputs are configured and provided
with the correct properties.
If specific interlocking conditions are needed for the execution of commands, the user can program the device
with bay interlocking by means of the user-defined logic functions (CFC) in the device. The interlocking condi-
tions of the system can be injected via the system interface and must be allocated accordingly.
The procedure for switching resources is described in the SIPROTEC 4 System Description under “Control of
Switchgear”.
Control Device
In the parallel switch devices 7VE61 and 7VE63 the switchgear can be controlled via the operator panel of the
device. Furthermore, control can be executed via the operator interface using a personal computer and via the
serial interface with a link to the substation control equipment.
Prerequisites
The variant 7VE63 is preferred since the number of resources being controlled is limited by the:
– binary inputs present
– binary outputs present
Functional Description
Operation Using the Keypad with Text Display
Using the navigation keys ▲, ▼, ◀▶, the control menu can be accessed and the switching device to be oper-
ated can be selected. After having entered a password, a new window is displayed in which multiple control
actions (e.g. close, open, cancel) are available and can be selected using the ▼ and ▲ keys. Thereafter, a query
for security reasons appears. After the security check is completed, the Enter key must be pressed again to
carry out the command. If this release does not occur within one minute, the process is aborted. Cancellation
via the ESC key is possible at any time before the control command is issued.
Operation Using the Keypad with Graphic Display
Commands can be initiated using the keypad on the local user interface of the relay. For this purpose, there
are three independent keys located below the graphic display. The key Ctrl causes the control display to
appear in the LCD. Controlling of switchgears is only possible within this control display, since the two control
keys OPEN and CLOSE only become active as long as the control display is present. The LCD must be changed
back to the default display for other, non-control, operational modes.
The navigation keys ▲, ▼, ◀▶ are used to select the desired device in the Control Display. The I key or the O
key is then pressed to convey the intended control command.
Consequently, the switch icon in the control display flashes in setpoint direction. At the lower display edge,
the user is requested to confirm his switching operation via the Enter key. Then a safety query appears. After
the security check is completed, the Enter key must be pressed again to carry out the command. If this confir-
2.15
2.15.1
2.15.1.1
Functions
2.15 Command Processing
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Summary of Contents for SIPROTEC 4 7VE61
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