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DMI
64
11/04 MN01219002Z-EN
Diagnostics 0 to 9
Submenus Diagnostics0 to Diagnostics9 indicate the circuit-
breaker status at a particular event.
By event is meant any change in circuit-breaker status with
regard to alarm or tripping messages, such as exceeding or
going below limit values or the tripping of the circuit-
breaker.
The first three lines below the title show time, date and
cause of alarm. The states of the individual phases are then
shown (1 to 3) as well as the neutral conductor (OK/Load
warning/Overload 1/Overload 2/Trip).
This data can be used to diagnose the cause of the fault on
the circuit-breaker. The valid parameter settings when the
event occurred are then shown.
Event Diagnostics0 shows the last event that occurred.
Diagnostics1 shows the one before that. By scanning and
comparing a succession of events it is possible reconstruct
the sequence of events up to tripping. The time stamp which
is also stored also enables circuit-breaker events to be
associated with events and states in the rest of the system.
In this way, errors in the system can be localised more easily.
DIAGNOSTICS0
(Time)
(Date)
(Cause of
1:
2:
3:
N:
Ir
Ii
Isd
Idn
Tr
Tsd
I2T
Tvdn
h
If in the case of a short-circuit (Trip
I
i
) the phase(s) which
cause(d) the trip could not be determined with certainty,
the status of the phases will be defined with “–”.
h
The information is only stored by the circuit-breaker if a
DMI is connected. Otherwise the relevant data arrays are
filled with the value 00.
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