ABB SPAC 536 C User Manual page 101

Operation
indications
Each overcurrent stage has its own starting in-
dicator and operation indicator shown as a fig-
ure in the digital display. Further all stages share
a common red LED indicator named "TRIP",
which indicates that the module has delivered a
tripping signal.
The operation indicator in the display remains
illuminated when the current stage resets, thus
indicating which protection stage was operat-
ing. The operation indicator is reset with the
Indication Explanation
1 I> START
2 I> TRIP
3 I>> START
4 I>> TRIP
5 I > START
0
6 I > TRIP
0
7 I >> START = The high-set stage I
0
8 I >> TRIP
0
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When one of the protection stages of the mod-
ule performs a tripping, the indicators for the
measured values of the module indicate the
faulty phase, i.e. in which phase(s) the current
has exceeded the setting value of the stage (so
called phase fault indication). If for instance,
the operation indicator of the I> stage is
switched goes on and the indicators I
are illuminated, the operation was caused by
overcurrent in phases L1 and L2. When press-
ing the push-button RESET, the phase fault
indication disappears.
RESET push-button. The function of the plug-
in module is not affected by an activated opera-
tion indicator. If a starting of a stage is short
enough not to cause a trip, the starting indica-
tion is normally self-reset when the stage is re-
set. By means of switches SGF2/1...4 if needed,
the starting indicators can be programmed for
manual resetting. The following table shows the
starting and tripping indicators and their mean-
ings.
= The low-set stage I> of the overcurrent unit has started
= The low-set stage I> of the overcurrent unit has tripped
= The high-set stage I>> of the overcurrent unit has started
= The high-set stage I>> of the overcurrent unit has tripped
= The low-set stage I > of the earth-fault unit has started
0
= The low-set stage I > of the earth-fault unit has tripped
0
>> of the earth-fault unit has started
0
= The high-set stage I >> of the earth-fault unit has started
0
= The circuit breaker failure protection has operated
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 shortly 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. Addi-
and I tionally, in most fault cases, a fault code show-
L1 L2
ing the nature of the fault appears on the dis-
play of the module. The fault code, consisting
of a red figure one and a green code number,
persists until the STEP/RESET button is
pressed. When a fault occurs, the fault code
should be recorded and stated when ordering
service.
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