4
L1
L2
L3
0
I
0
I
-
-
+
+
BS
5A 1A
SPAJ 111 C
U2
U3
1
1
1
1
D
C
B
A
+
U
25
SGR/1
U3
+ -
E
+
-
(~)
(~)
≅
_
10 11
61 62
71 72
70
78
77
81
80
69
68
66
65
SGR
7
5
6
8
3
2
4
START1 SIGNAL1 TRIP2
TRIP1
SPA-ZC_
Rx
Tx
26 27
IRF
IRF
74 75
73
F
START2
TS2
TS1
SGB
SS1
SS2
U1
5
4
I/O
t >>
t >
Io>
Io>>
SERIAL
PORT
aux
Fig. 2. Connection diagram for the sensitive earth-fault relay SPAJ 111 C.
U
aux
Auxiliary voltage
A,B,C,D,E,F
Output relays
IRF
Self-supervision function
BS
Blocking signal
SS
Start signal
TS
Trip signal
SGR
Switchgroup for configuring trip and alarm signals
SGB
Switchgroup for configuring blocking signals
TRIP_
Trip output
SIGNAL1
Signal on relay operation
START_
Start signal or signal on relay operation
U1
Sensitive earth-fault relay module SPCJ 1C7
U2
Power supply and I/O module SPTU 240S1 or SPTU 48S1
U3
I/O module SPTE 1E12
SERIAL PORT
Serial communication port
SPA-ZC_
Bus connection module
Rx/Tx
Receiver (Rx) and transmitter (Tx) of the bus connection module
Connections