Siemens SIPROTEC 4 7UT6 Series, Руководство пользователя

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Spontaneous Displays
After a fault, the device displays automatically and without any operator action on its LCD display the most
important fault data in the sequence as shown in the following figure.
[anzeige-spontanmeldungen-im-display-des-geraetes-260602-kn, 1, en_GB]
Figure 2-127 Display of spontaneous messages in the display – example
Retrieved Annunciations
The annunciations of the last eight network faults can be retrieved and output. Altogether up to 600 annunci-
ations can be stored. New annunciations are added at the end of the list. If the memory has been exceeded,
the oldest annunciation is overwritten for each new message.
Spontaneous Annunciations
Spontaneous indications contain information on new incoming indication. Each new incoming annunciation
appears immediately, i.e. the user does not have to wait for an update or initiate one. This can be useful help
during operation, testing and commissioning.
Spontaneous indications can be read out via DIGSI. For more information see the SIPROTEC 4 System Descrip-
tion.
General Interrogation
The present condition of a SIPROTEC 4 device can be examined with DIGSI by viewing the contents of the
General Interrogation. All of the annunciations that are needed for a general interrogation are shown along
with the actual values or states.
Switching Statistics
The function counts the number of trips initiated by the device, determines and signals the interrupted current
for each trip command, and stores a summated value of the current.
The messages in switching statistics are counters for the accumulation of interrupted currents by each of the
breaker poles, the number of control commands issued by the device to the breakers. The interrupted currents
are in primary terms..
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 back to zero or to any value
within the setting range.
They can be called up at the front of the device, read out via the operating interface using a PC with DIGSI, or
transferred to a central master station via the system interface.
A password is not required to read switching statistics; however, a password is required to change or delete
the statistics.
Measurement
Display and Transmission of Measured Valuables
Operational measured and metered values are determined in the background by the processor system. They
can be called up at the front of the device, read out via the operating interface using a PC with DIGSI, or trans-
ferred to a central master station via the system interface.
The computation of the operational measured values is also executed during an existent system fault in inter-
vals of approx. 0.6 s.
Next to the measured values that can be acquired directly at the device's measuring inputs, the device calcu-
lates a wide range of other values. Many measured values are calculated from the measured quantities and
2.22.1.4
2.22.1.5
2.22.1.6
2.22.2
2.22.2.1
Functions
2.22 Auxiliary Functions
278 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016