Chapter 2 Installation
12
-
-
-
-
-
-
N
K
-
+
L
K
+
-
L
K
+
-
L
+
+
+
+
+
+
K
L
-
+
PT
CURRENT
I
-
-
I
-
-
I
-
-
I
-
-
+
-
1
2
3
4
+
-
+
-
+
-
INPUTS
SA330 150A
03-05003
MEASUREMENT
4N
INPUT VOLTAGE
V
1
V
J9
1
V
3
V
2
3
2
V
V
N
4
5
4
6
SW1
1
9
6
JDR1
COM1
RS-232
5
1
1
RS-422/485
IRIG-B
J7
4
-Tx
J3
2
+Rx
1
+Tx
3
3
2
2
5
-Rx
4
5
3
6
12V GND
-
+
RDM
SUPPLY
MAIN POWER
GROUND
MEASURE
VDC
BACKUP
POWER SUPPLIES
MAIN
-
+
N/-
2
125/220V DC
J10
DC
+
1
N/-
L/+
-
SW2
3
4
L/+
5
6
OR 120/230V AC
125/220V DC
8
1
RS-485
ETHERNET
RS-422/485
MODEM
JP3
1
4
J1
COM2
7
8
4
+Rx
+Tx
1 2
4
-Rx
3
-Tx
5
1
J2
COM3
3
P.SUPPLY
4
RDM
5
3 2
4
USB
J11
2
3
2
4
1
6
5
7
Switches
Shorting
1
J5
8
LOAD
(B)
LINE 2
LINE 3 (C)
LINE 1 (A)
8
-
-
I
-
-
I
+
5
+
-
I
-
6
-
I
+
-
7
-
+
-
-
-
K
-
L
+
+
-
+
K
-
L
+
-
K
L
K
L
SA330 20A
INPUTS
CURRENT
RELAY CTs
METER CTs
J14
J12
Figure 2-5a
SA330:
Four Wire WYE Connection Using 3 PTs, 4 CTs
(3-element)
Wiring Mode =
4LL4
or
4Ln4
