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Operation
indicators
Each stage has its own operation indicator
shown as a red figure to the left in the digital
display. Further, all stages have a common indi-
cator named "TRIP"; a red led indicates that
the module has delivered a tripping signal.
The operation indicator on the display remains
illuminated when the stage resets, thus indicat-
ing which protection stage was operating.
Indication
Explanation
1
I
> alarm
a
2
I
> start
b
3
I
> trip
b
∆I
4
> alarm
1
∆I
5
> start
2
∆I
6
> trip
2
7
I< operation
8
t
rec
9
EXT.TRIP
The self-supervision alarm indicator IRF indi-
cates that the self-supervision system has de-
tected a permanent fault. The indicator is lit
with 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-
If start of a stage does not last long enough to
cause a trip, the start indication on the display
is normally self-reset when the stage is reset. If
needed, the start indicators can be given a latch-
ing function by means of switches SGF/3...4.
The following table shows the start and trip in-
dicators on the display and their meanings.
= The overload stage I
> has given an alarm
a
= The overload stage I
> has started
b
= The overload stage I
> has tripped
b
= Stage ∆I
> has given an alarm
1
= Stage ∆I
> has started
2
= Stage ∆I
> has tripped
2
= Stage I< has operated
= Reconnection inhibit is active, indication is self-reset
= A trip from an external relay has been carried out via the relay
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, can-
not be erased from the display of the module
by resetting. When a fault occurs, the fault code
should be recorded and stated when service, is
ordered.
7
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