Statistics; Function Description - Siemens SIPROTEC 7SD610 Manual

Functions
2.17 Additional Functions
Retrievable Indications
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 Indications
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 commissioning.
Spontaneous indications can be read out via DIGSI. For more information see the SIPROTEC 4 System De-
scription.
General Interrogation
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 commands initiated by the auto-reclosure function.

2.17.3.1 Function Description

Counters and memories
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 required 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 automatic reclosing commands
If the device is equipped with the integrated automatic reclosure, the automatic close commands are also
counted, separately for reclosure after 1-pole tripping, after 3-pole tripping as well as separately for the first re-
closure cycle and other reclosure cycles.
Interrupted currents
Furthermore, for each trip command the interrupted current for each pole is acquired, output in the trip log and
accumulated in a memory. The maximum interrupted current is stored as well. The indicated measured values
are indicated in primary values.
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SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011