Functions
2.17 Additional Functions
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
201
Retrievable Messages
The messages for the last eight network faults can be retrieved and read out. The definition of a network fault
is such that the time period from fault detection up to final clearing of the disturbance is considered to be one
network fault. If auto-reclosing occurs, then the network fault ends after the last reclosing shot, which means
after a successful reclosing or lockout. Therefore the entire clearing process, including all reclosing shots, oc-
cupies only one trip log buffer. Within a network fault, several fault messages can occur (from the first pickup
of a protective function to the last dropout of a protective function). Without auto-reclosing each fault event rep-
resents a network fault.
In total 600 indications can be recorded. Oldest data are erased for newest data when the buffer is full.
General Interrogation
The general interrogation which can be retrieved via DIGSI enables the current status of the SIPROTEC 4
device to be read out. All messages requiring general interrogation are displayed with their present value.
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.
2.17.1.3 Information to a Control Center
Stored information can additionally be transferred to a central control and storage device if the relay is connect-
ed to such a device via port B. Transmission is possible via various transmission protocols.
2.17.2 Statistics
The number of trips initiated by 7SD80, the accumulated breaking currents resulting from trips initiated by pro-
tection functions and the number of close commands initiated by the automatic reclosure function are counted.
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