Siemens SIPROTEC 7SD610 - Statistics; Function Description

2 Functions
246
7SD610 Manual
C53000-G1176-C145-4
Figure 2-111 Spontaneous fault indication display
Retrievable Indica-
tions
The indications of the last eight system faults can be retrieved and read out. A total of
600 indications can be stored. The oldest indications are erased for the newest fault
indications when the buffer is full.
Spontaneous Indi-
cations
Spontaneous indications contain information that new indications have arrived. Each
new incoming indication appears immediately, i.e. the user does not have to wait for
an update or initiate one. This can be a useful help during operation, testing and com-
missioning.
Spontaneous indications can be read out via DIGSI. For more information see the
SIPROTEC 4 System Description.
General Interroga-
tion
The present condition of the SIPROTEC 4 device can be retrieved via DIGSI by
viewing the contents of the General Interrogation. It shows all indications that are
subject to general interrogation with their current value.
2.17.3 Statistics
Counting includes the number of trips initiated by 7SD610, the accumulated breaking
currents resulting from trips initiated by protection functions, the number of close com-
mands initiated by the auto-reclosure function.
2.17.3.1 Function Description
Counters and mem-
ories
The counters and memories of the statistics are saved by the device. Therefore, the
information will not get lost in case the auxiliary voltage supply fails. The counters,
however, can be reset to zero or to any value within the setting range.
Switching statistics can be viewed on the LCD of the device, or on a PC running DIGSI
and connected to the operating or service interface.
A password is not required to read switching statistics; however, a password is re-
quired to change or delete the statistics. For more information see the SIPROTEC 4
System Description.
Number of trips The number of trips initiated by the device 7SD610 is counted. If the device is capable
of single-pole tripping, a separate counter for each circuit breaker pole is provided.
Number of auto-
matic reclosing
commands
If the device is equipped with the integrated automatic reclosure, the automatic close
commands are also counted, separately for reclosure after single-pole tripping, after
three-pole tripping as well as separately for the first reclosure cycle and other reclo-
sure cycles.
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