19
L1
+
(
~
)
-
(
~
)
TRIP1
IRF
A
TIMER
START
S1
N
TIMER
STOP
S2
L2
L3
L1
6
8
7
3
2
4
5A
1A
5
SGR/1
SPAJ 131 C
U2
U3
U3
1
1
11
DCB
A
+-
Uaux
E
≅
_
5A
1A
5A
1A
5
81
68
66
1
2
3
4
6
7
8
9
10
11
61
62
70
71
72
77
78
80
69
65
SGR
IRF
START1
TRIP2
TRIP1
IRF
BS
TS2
TS1
SGB
SS1
SS2
U1
I/O
3I>
t >>
t >,k
SIGNAL1
A
4
5
3I>>
Fig. 8. Secondary injection test connection for the overcurrent relay SPAJ 131 C.
When the test connection has been finished and
the selector switches properly set, the auxiliary
voltage can be connected to the relay.
The correctness of the test connection can be
verified by using a multimeter.