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2.9
Auxiliary Functions
The additional functions of the 7VK61 breaker management relay include:
• processing of messages,
• processing of operational measured values,
• storage of fault record data.
2.9.1
Message Processing
After the occurrence of a system fault, data regarding the response of the protective relay and the measured
quantities should be saved for future analysis. For this reason message processing is done in three ways:
2.9.1.1 Method of Operation
Indicators and Binary Outputs (Output Relays)
Important events and states are displayed by LEDs on the front cover. The device also contains output relays
for remote signaling. Most indications and displays can be configured differently from the delivery default set-
tings (for information on the delivery default setting see Appendix). The SIPROTEC 4 System Description gives
a detailed description of the configuration procedure.
The output relays and the LEDs may be operated in a latched or unlatched mode (each may be individually set).
The latched conditions are protected against loss of the auxiliary voltage. They are reset
• On site by pressing the LED key on the relay,
• Remotely using a binary input configured for that purpose,
• Using one of the serial interfaces,
• Automatically at the beginning of a new pickup.
Status messages should not be latched. Also, they cannot be reset until the criterion to be reported is remedied.
This applies to, e.g., indications from monitoring functions, or the like.
A green LED displays operational readiness of the relay („RUN"); it cannot be reset. It extinguishes if the self-
check feature of the microprocessor detects an abnormal occurrence, or if the auxiliary voltage fails.
When auxiliary voltage is present but the relay has an internal malfunction, the red LED („ERROR") lights up
and the processor blocks the relay.
DIGSI enables you to selectively control each output relay and LED of the device and, in doing so, check the
correct connection to the system. In a dialog box, you can, for instance, cause each output relay to pick up, and
thus test the wiring between the 7VK61 and the system without having to create the indications masked to it.
Information on the Integrated Display (LCD) or to a Personal Computer
Events and conditions can be read out on the display on the front panel of the relay. Using the front operator
interface or the rear service interface, for instance, a personal computer can be connected, to which the infor-
mation can be sent.
In the quiescent state, i.e. as long as no system fault is present, the LCD can display selectable operational
information (overview of the operational measured values) (default display). In the event of a system fault, in-
formation regarding the fault, the spontaneous displays, are displayed instead. After the fault indications have
been acknowledged, the quiescent data are shown again. Acknowledgement can be performed by pressing
the LED buttons on the front panel (see above).
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Functions
2.9 Auxiliary Functions
163
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