Start And Operation Indicators - ABB SPAC 315 C User Manual And Technical Description

Start and
operation
indicators
Both overcurrent stages have their own start
indicators and operation indicators shown as
figures on the digital display. Further, all the
protection stages share a common red LED
indicator marked "TRIP" which is located in
the lower right corner of the front panel and
which is lit on operation of a stage.
The figure on the display indicating starting or
operation remains lit when the current stage
resets, thus indicating which protection stage
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
0
8 I >> TRIP
0
9 CBFP
When one of the protection stages of the relay
module operates, the indicators for the energiz-
ing current of the module show the faulty phase,
i.e. in which phase(s) the current has exceeded
the set start value of the stage (so called phase
fault indication). If, for instance, the operation
indicator "2" of the low-set stage is lit , as are the
indicators I and I also, the relay operation
L1 L2
has been caused by overcurrent on the L1 and L2
phases. The fault indications are reset by push-
ing the RESET push-button.
has operated. The start or operation indicators
are reset by pushing the RESET push-button.
The function of the relay module is not affected
by an unreset indicator. If the starting of a stage
is short enough not to cause an operation of the
relay, the start indication is normally self-reset
when the stage resets. By means of switches
SGF2/1...4 the start indicators can be configured
for manual resetting. The following table shows
a guide to the start and trip indicators of the
relay module.
= the low-set stage I> of the overcurrent unit has started
= the low-set stage I> of the overcurrent unit has operated
= the high-set stage I>> of the overcurrent unit has started
= the high-set stage I>> of the overcurrent unit has operated
= the low-set stage I > of the earth-fault unit has started
0
= the low-set stage I > of the earth-fault unit has operated
0
= the high-set stage I >> of the earth-fault unit has started
0
= the high-set stage I >> of the earth-fault unit has operated
0
= the circuit breaker failure protection has operated
The self-supervision alarm indicator IRF indi-
cates, when lit, that the self-supervision system
has detected a permanent internal relay fault.
The indicator is lit with red light shortly after a
fault has been detected. At the same time the
relay module generates a control signal to the
output relay of the self-supervision system IRF.
Additionally, in most fault cases, an auto-diag-
nostic fault code showing the nature of the fault
appears on the display. The fault code, consists
of a red figure one (1) and a green code number.
When a fault code is obtained it should be
recorded for statistical and maintenance pur-
poses.
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