Functions
2.26 Additional Functions
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
470
Fault Location Options
In addition to the display located on the device front and in DIGSI, there are additional display options available
in particular for the fault location. They depend on the device version, configuration and allocation.
• If the device features the BCD output for the fault location, the transmitted figures mean the following:
0 to 195: the calculated fault location in % (if greater than 100%, the error lies outside the protected line in
a forward direction);
197: negative fault location (fault in reverse direction);
199: overflow.
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.
2.26.3
Statistics
Counting includes the number of trips initiated by 7SD5, the accumulated breaking currents resulting from trips
initiated by protection functions, the number of close commands initiated by the auto-reclosure function.
2.26.3.1 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 7SD5 is counted. If the device is capable of single-pole tripping, a
separate counter for each circuit breaker pole is provided.
Содержание SIPROTEC
Страница 20: ...Contents SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 20 ...
Страница 351: ...Functions 2 18 Synchronism and Voltage Check optional SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 351 ...
Страница 494: ...Functions 2 27 Command Processing SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 494 ...
Страница 640: ...Technical Data 4 27 Dimensions SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 640 ...
Страница 657: ...Appendix A 2 Terminal Assignments SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 657 7SD5 W ...
Страница 754: ...Appendix A 10 Measured Values SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 754 ...
Страница 756: ...Literature SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 756 ...
Страница 768: ...Glossary SIPROTEC 7SD5 Manual C53000 G1176 C169 5 Release date 02 2011 768 ...