12
Operation
indicators
and the indicators I
L1
and I
L2
are ON at the
same time, overcurrent has occurred on phase
L1 and L2.
C)
Besides being a code number at data presen-
tation, the leftmost red digit in the display serves
as a visual operation indicator. An operation
indicator is recognized by the fact that the red
digit alone is switched on. The operation indi-
cation from a start or the reconnection inhibit
is always replaced by a new operation indica-
tion. On the other hand an operation indica-
tion from a stage connected to the trip relay A
can not be replaced by a new operation indica-
tion. In order to enable reading of actual cur-
rent levels etc. when reconnection time is run-
ning, it is possible to acknowledge the indica-
tion 8 while the unit is still activated. The same
applies to the external trip indication 9. In these
cases the indications are memorized and reap-
pear when the display is dark. Operation indi-
cator 8 is automatically reset when the capaci-
tor bank is reconnected. The following table,
named OPERATION IND. on the relay front
panel, is a key to the operation indicator code
numbers used.
A)
The indicator TRIP is lit when one of the
protection stages operates. When the protection
stage returns, the red indicator remains alight.
B)
If the display is dark when one of the pro-
tection stages I
a
> or I
b
> request for tripping,
the faulty phase is indicated with a yellow LED.
If, for instance, the TRIP indicator glows red,
Indication
Explanation
1
I
a
> alarm
= The overload stage I
a
> has given an alarm
2
I
b
> start
= The overload stage I
b
> has started
3
I
b
> trip
= The overload stage I
b
> has tripped
4
∆
I
1
> alarm
= The stage
∆
I
1
> has given an alarm
5
∆
I
2
> start
= The stage
∆
I
2
> has started
6
∆
I
2
> trip
= The stage
∆
I
2
> has tripped
7
I< operation
= The stage I< has operated
8
t
rec
= The reconnection inhibit is active, indication is self-reset
9
EXT.TRIP
= A trip from an external relay has been carried out via the relay
SPCJ 4D40
REGISTERS
OPERATION IND.
0
0
0
0
0
RS 421
Ser.No.
SPAJ 160 C
2
5
0127A
f
n = 50Hz
60Hz
aux
80...265V ~–
18...80V –
n
I
= 1A
5A ( )
I
( )
n
I
=
I
1A
5A
∆
U
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RECONN. INH.
EXTERN. TRIP
( )
<
%
t
[ ]
I
n
/
L1
I
I
n
/
L3
I
I
<
OPERATION
I
n
/
L2
I
I
(
t
I
∆
1
(
t
%
)
[ ]
%
)
[ ]
I
∆
2
I
∆
1
I
∆
2
ALARM
START
TRIP
I
∆
2
I
I
%
[ ]
/
∆
∆
n
c
%
)
(
>
t
[ ]
I a
%
)
(
>
t
[ ]
I b
>
ALARM
I a
>
START
I b
>
TRIP
I b
>
>
>
>
>
TRIP
PROGRAM
RESET
STEP
L1
L2
L3
IRF
I
I
I
I
0128A
SGR
SGB
SGF
3
I >
∆
3
I <
I
∆
cs
I
∆
n
I
I
%
[
]
∆
1
∆
n
I
I
%
[
]
∆
2
∆
k
∆
2
t
∆
1
s
[ ]
t
rec
min
[
]
< s
[ ]
n
<
I
I
/
t
a min
[ ]
b
I
I
%
[ ]
a
I
I
/
b
k
t
SPCJ 4D40
n
>
>
>
>
n
I
%
[
]
∆
c
