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D) The operation indicator on the display and
the "TRIP" indicator persist when the protec-
tive stage returns to normal. The indicators are
reset by pushing the RESET/STEP push-but-
ton.
Further, the indicators may be reset via the ex-
ternal control input 10-11 by applying a con-
trol voltage to the input, provided that the
switch SGB1/8 is in position 1.
The basic protective relay functions are not de-
pending on the state of the operation indica-
tors, i.e. reset or non-reset. The relay is perma-
nently operative.
> or ∆I
If stage I
> starts, but no tripping oc-
b
2
curs because the energizing quantity goes be-
low the starting level before the delay circuit
times out, the starting indications are automati-
cally switched off. However, by means of the
switches SGF/3...4 the starting indications may
be persistent which means that they are to be
reset by pushing the RESET/STEP push-but-
ton. The persistent indications are obtained
through the following programming:
Switch SGF/3 = 1 Starting indication on I
persistent
Switch SGF/4 = 1 Starting indication on ∆I
persistent
On delivery from factory the switches SGF/3...4 = 0
E) The self-supervision alarm indicator IRF in-
dicates that the self-supervision system has de-
tected a permanent fault. The indicator activates
with a red light about 1 minute after the fault
has been detected. At the same time the plug-in
module delivers a signal to the self-supervision
system output relay of the protection assembly.
Additionally, in most cases, a fault code show-
ing the nature of the fault appears on the dis-
play of the module. The fault code, consists of
a red figure one and a green code number, this
cannot be erased from the display of the mod-
ule by resetting. When a fault occurs, the fault
code should be recorded and stated when serv-
ice, is ordered.
>
b
>
2
13
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