Behavior of the Fault Recorder
Who triggers the Fault Recorder?
The Fault Recorder is triggered by the rising edge of the »Prot . Pickup« (General Pickup)
signal. Please note that »Prot . Pickup« (General Pickup) is an OR-connection of all Pickup
signals. The first Pickup will trigger the Fault Recorder.
At which point of time will the fault measurements be captured?
The fault measurements are captured (written) when the trip decision is taken. The point
in time when the measurements are captured (after a trip) can optionally be delayed by
the parameter [Device Para / Recorders / Fault rec] »Fault rec . t-meas-delay«. This might
be reasonable in order to achieve more reliable measuring values (e. g. in order to avoid
measuring disturbances caused by significant DC-components).
Modes
If it is required that a fault record be written even if a general alarm has not lead to a trip,
the parameter [Device Para / Recorders / Fault rec] »Fault rec . Record-Mode« has to be
set to “Pickups and Trips”.
Set parameter »Record-Mode« to “Trips only” if a pickup without a trip decision shall not
be recorded by the Fault Recorder.
When does the overlay (pop-up) appear on the display of the HMI?
A pop-up appears on the HMI display with the falling edge of the General Pickup (»Prot .
Pickup«) signal.
NOTICE!
No time to trip will be shown if the pickup signal that triggers the fault recorder is issued
by another protection module than the trip signal. This might happen if more than one
protection module is involved in a fault.
NOTICE!
Please note: The parameter settings (thresholds, etc.) that are shown in a fault record are
not part of the fault record itself. They are always read out from the current device
settings. If it may be the case that the parameter settings shown in a fault record were
updated, they are indicated with an asterisk symbol within the fault record.
To prevent this please proceed as follows:
Save any fault record that should be archived to your local network/hard disk before
doing any parameter change. Delete all the fault records in your fault recorder
afterwards.
Memory
The last stored fault record is saved (fail-safe) within the Fault Recorder. (The others are
saved within a volatile memory, that depends on the auxiliary power of the protective
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EMR-3MP0
5 Recorders
5.2 Fault Recorder
