Description; Information List - Siemens SIPROTEC 7SD80 Manual

Functions
2.17 Additional Functions

2.17.2.1 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 counter and stored values but is required to delete them. For more informa-
tion see the SIPROTEC 4 System Description.
Number of Trips
This function counts the number of trips initiated by the device 7SD80.
Number of Automatic Reclosing Commands
If the device is equipped with the integrated automatic reclosure, the automatic close commands are also
counted separately for each reclosure cycle.
Breaking Currents
Following each trip command the device registers the value of each current phase that was switched off in each
pole. This information is then provided in the trip log and summated in a register. The maximum current that
was switched off is also stored. Measured values are indicated in primary values.
Transmission Statistics
In 7SD80 the protection communication is registered in statistics. The runtimes of the information between the
devices via the protection data interfaces (forth and back) are measured permanently. The values are kept
stored in the Statistics folder. The availability of the transmission media is also reported. The availability is in-
dicated in % / min and % / h. This enables an evaluation of the transmission quality.

2.17.2.2 Information List

No. Information
1000 # TRIPs=
Σ Ia =
1027
Σ Ib =
1028
Σ Ic =
1029
1030 Ia max. =
1031 Ib max. =
1032 Ic max. =
2896 79 #Close1./3p=
2898 79 #Close2./3p=
202
Type of In-
formation
VI Number of breaker TRIP commands
VI Accumulation of interrupted current Ph A
VI Accumulation of interrupted current Ph B
VI Accumulation of interrupted current Ph C
VI max. fault current Phase A
VI max. fault current Phase B
VI max. fault current Phase C
VI No. of 1st AR-cycle CLOSE commands,3pole
VI No. of higher AR-cycle CLOSE commands,3p
Comments
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011