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Functions
2.25 Function Control and Circuit Breaker Test
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
459
2.25.3 Device
The device requires some general information. This may be, for example, the type of indication to be issued in
the event a power system fault occurs.
2.25.3.1 Command-Dependent Messages
Spontaneous Fault Messeges
After a fault, the essential fault data spontaneously appear on the device display. Under address
610
FltDisp.LED/LCD
you can select whether the spontaneous fault indications are updated in every case of
fault (
Target on PU
) or only in faults with tripping (
Target on TRIP
).
For devices with graphic display, you can specify in address
615 Spont. FltDisp.
whether a spontaneous
fault message appears automatically on the display (
YES
) or not (
NO
). For devices with text display such indi-
cations will appear anyway after a power system fault.
Figure 2-229 Generation of spontaneous fault indications on the display
Reset of Stored LED / Relays
Pickup of a new protection function generally deletes all stored LED / relays so that only the information of the
latest fault is displayed at a time. The deletion of the stored LED and relays can be inhibited for a settable time
under address
625 T MIN LED HOLD
. Any information occurring during this time are then combined with a
logical OR function.
Under address
610 FltDisp.LED/LCD
, also the information of the latest fault stored on LED and relays can
be deleted with the setting (
Target on TRIP
) unless this fault has lead to a trip command of the device.
Note
Setting the address
610 FltDisp.LED/LCD
to (
Target on TRIP
) only makes sense if address
625 T MIN
LED HOLD
is set to 0.