5
Front panel
o
IRF
I
1312
0.5
0.05
1.0
30
5
0.5
0.05
1.0
1.0
6.0
10
STEP
RESET
SG1
0
1
1
2
3
4
5
6
7
8
40
SPCJ 1C7
B
I
>>
I o
>
I o
[ ]
s
>
t
n
I
n
I
>>
t
[ ]
s
>
I o
>>
I o
[ ]
%
[ ]
%
STEP
Current measurement indicator
Indicator and start value
setting knob of stage I
0
>
Operate time setting knob and
indicator of stage I
0
>
Indicator and start value
setting knob of stage I
0
>>
Operate time setting knob and
indicator of stage I
0
>>
Simplified device symbol
Self-supervision alarm
indicator
Display for set, measured
and recorded values
Display step push button
Selector switchgroup SG1
Switchgroup indicator
Reset push button
Start/operate indicators
Module type designation
Fig. 3. Front panel of the sensitive residual current relay module SPCJ 1C7
Both earth-fault stages have their own yellow/
red LED indicators. Yellow light indicates start-
ing of the concerned stage and red light indicates
that the overcurrent stage has operated.
The four LED indications can, independently
of one another, be given a self-reset or or a
manual reset mode of operation. The manual
reset mode means that the indicator remains lit
after being switched on, although the overcur-
rent stage, which controls the indicator, resets.
If, for instance, the yellow start indicator is given
the manual reset mode and the red indicator the
self-reset mode, the yellow indicator is lit, when
the stage starts, which then turns red if and when
the stage operates. When the overcurrent stage
resets only the yellow indication remains lit.
The indicators, which have been given the
manual reset mode, are reset locally by pushing
the RESET push button on the front panel or by
remote control over the SPA bus using the
command V101 or V102.
An unreset operation indicator does not affect
the protective functions of the relay module.
The relay module is constantly operative, re-
gardless of the indicators have been reset or not.
The self-supervision alarm indicator IRF indi-
cates that the self-supervision system has de-
tected a permanent internal relay fault. The
indicator is lit with red light shortly after the
fault has been detected. At the same time the
relay module puts forward a control signal to the
self-supervision system output relay of the pro-
tection relay unit.
Additionally, in most fault cases, a fault code
showing the type of the relay fault appears on the
display of the module. The fault code consists of
a red number one (1) and a green three-digit
code number. When a fault message appears on
the display, the code number should be noted
down to facilitate the subsequent fault finding
and repair work.
Start and opera-
tion indicators
