Siemens SIPROTEC 7UT613 series, Руководство пользователя

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2 Functions
302
7UT613/63x Manual
C53000-G1176-C160-2
2.22.1.2 Operational Annunciations (Buffer: Event Log)
The operational annunciations contain information that the device generates during
operation and on operational conditions.
Up to 200 operational annunciations are stored in chronological order in the device.
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.
Operational annunciations come in automatically and can be read out from the device
display or a personal computer. Faults in the power system are indicated with „Net-
work Fault“ and the present fault number. The fault annunciations (Trip Log) contain
details about the history of faults.
2.22.1.3 Fault Annunciations (Buffer: Trip Log)
Following a system fault, it is possible, for example, to retrieve important information
regarding its progress, such as pickup and trip. The time the initial occurrence of the
short circuit fault occurred is accurately provided via the system clock. The progress
of the disturbance is output with a relative time referred to the instant of fault detection
(first pickup of a protection function), so that the duration of a fault until tripping and up
to reset of the trip command can be ascertained. The tripping of the time entry is about
1 ms.
A system fault starts with the recognition of the fault by the fault detection, i.e. first
pickup of any protection function, and ends with the reset of the fault detection, i.e.
dropout of the last protection function. Where fault causes several protective functions
to pick up, the fault is considered to include all that occurred between pickup of the
first protection function and dropout of the last protection function.
Spontaneous Dis-
plays After a fault, the device displays automatically and without any operator action on its
LCD display the most important fault data in the sequence 2-124 shown in the follow-
ing figure.
Figure 2-124 Display of spontaneous messages in the display – example
Retrieved Annunci-
ations The annunciations of the last eight network faults can be retrieved and output. Alto-
gether up to 600 annunciations can be stored. New annunciations are added at the
end of the list. If the memory has been exceeded, the oldest annunciation is overwrit-
ten for each new message.
2.22.1.4 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