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Functions
2.14 Additional Functions
Spontaneous Messages
The spontaneous messages displayed using DIGSI reflect the present status of incoming information. Each
new incoming message appears immediately, i.e. the user does not have to wait for an update or initiate one.
2.14.1.3 Information to a Substation Control Center
If the device has a serial system interface, stored information may additionally be transferred via this interface
to a centralized control and storage device. Transmission is possible via different transmission protocols.
2.14.2
Statistics
The number of trips initiated by the 7SC80 and the operating hours under load are counted. An additional
counter allows to determine the number of hours in which the switching device is in the „open" condition.
The counter and memory levels are protected against loss of auxiliary voltage.
During the first start of the device, the statistical values are pre-defined to zero.
2.14.2.1 Description
Number of Trips
In order to count the number of trips initiated by the 7SC80, the position of the circuit breaker auxiliary contacts
must be communicated to the 7SC80 via binary inputs. As to that, the internal pulse counter „#of TRIPs="
must be allocated in the matrix to a binary input that is controlled by the switching device OPEN position. The
pulse count value "Number of TRIPs CB" can be found in the "Statistics" group if the option "Measured and
Metered Values Only" was enabled in the configuration matrix.
Operating Hours
The operating hours under load are also stored (= the current value in at least one phase is greater than the
limit value BkrClosed I MIN set under address 212).
Hours Meter "CB open"
A meter can be realized as CFC application if it adds up the number of hours in state „CB open" similarly to the
operating hours meter. The universal hours meter is connected to a respective binary input and counts if this
binary input is active. Alternatively, the fact that the value falls below the parameter value 212 BkrClosed I
MIN may be used as a criterion for starting the meter. The meter can be set or reset. A CFC application example
for such a meter is available on the Internet (SIPROTEC Download Area).
2.14.2.2 Setting Notes
Reading/Setting/Resetting the Counters
The counters can be read via the Web Monitor or using DIGSI. The procedure using DIGSI is explained in the
SIPROTEC 4 System Description. Setting or resetting of these statistical counters takes place under the menu
item MESSAGES —> STATISTICS by overwriting the counter values displayed.
160
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
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