2 Functions
210
7UM61 Manual
C53000-G1176-C127-3
Retrievable Indica-
tions
The indications of the last eight faults can be retrieved and output. Where a generator
fault causes several protective functions to pick up, the fault is considered to include
all that occurred between pickup of the first protective function and dropout of the last
protective function.
In total 600 indications can be recorded. Oldest data are erased by newest data when
multiple fault indications occur.
General Interrogation
The general interrogation which can be retrieved via DIGSI
®
4 enables the current
status of the SIPROTEC
®
device to be read out. It shows all indications subject to
general interrogation, with their current value.
Spontaneous Annunciations
The spontaneous indications displayed using DIGSI
®
4 reflect the present status of in-
coming current indications. Each new incoming indication appears immediately, i.e.
the user does not have to wait for an update or initiate one.
Statistics
The indications in statistics are counters for breaker switching operations instigated by
the 7UM61 as well as for accumulation of short-circuit currents involved in disconnec-
tions caused by the device protection functions. Measured values are indicated in
primary terms.
They can be viewed on the device front and read out using the DIGSI
®
4 program on
a PC via the operator or service interface.
A password is not required to read counter and stored values but is required to change
or delete the them.
Information to a Control Centre
If the device has a serial system interface, stored information may additionally be
transferred via this interface to a centralised control and storage device. Transmission
is possible via different transmission protocols.
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