Switching Statistics; Viewing The Switching Statistics - Siemens SIPROTEC 7SA6 Manual

Distance protection relay for all voltage levels

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Switching Statistics

From PC with

C53000-G1176-C156-2

The messages in switching statistics are counters for the accumulation of interrupted

currents by each of the breaker poles, the number of trips issued by the device to the

breaker. The interrupted currents are in primary terms.

Switching statistics can be viewed on the LCD of the device, or on a PC running

4 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.

In 7SA6 the statistics register the data of the protection communication. The transmis-

sion time of the information from device to device via protection data interfaces (com-

ing and going) is measured steadily and registered in the folder "Statistic". The avail-

bility of the means of transmission is also indicated. The availability is indicated in %/

min and %/h. This enables the user to assess the transmission quality.

For each trip command initiated by a protective element of the device, the magnitude

of interrupted current for each circuit breaker pole is determined and stored. The cur-

rent magnitudes are added to previously interrupted currents, and the accumulated

values are stored.

In devices with automatic reclosure the number of reclosure commands is counted,

i. e. separately according to single-pole (if available) and three-pole automatic reclos-

ure cycles as well as separately according to the first and all further automatic reclos-

The memories are protected against auxiliary voltage failure.

With a device ready for operation, first press the

The first menu item Annunciation is marked.

key to enter the ANNUNCIATION sub-menu (see Figure 7-1).

key to select the item Statistic , and switch to the list of statistics values

key. The STATISTIC list appears. See Figure 7-15.

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Switching statistics viewed from the front display

Under Annunciation (Figure 7-2), the switching statistics can be found by double

clicking. Double click on Statistic . The contents of the statistic counters is dis-

played in another window. See Figure 7-16.

Control During Operation

key. The MAIN MENU appears.