AC CURRENT TRANSFORMERS for Ammeters (Low Voltage)
Microprocessor-Based True RMS Meter
MFO / RCT
For Ammeters, Wattmeters, Instrumentation, Relays and Energy Management Systems
Current Ratios from 20:5 to 3000:5

Made in Santa Ana, CA

NEWPORT PRODUCT INFO
• MECHANICAL
• PRICE

The MFO and RCT series current transformers can be used with NEWPORT® INFCAC digital panel meters, which can be scaled to display ac current. The nameplate current ratio of the current transformer (given in the chart below) is calculated on the assumption that the primary conductor will be passed once through the transformer opening. If necessary, this rating can be reduced in even multiples by looping the conductor two or more times through the opening. The ratio of the current transformer can also be modified by forward- or back-winding the secondary lead through the window of the current transformer. Accuracy is given for the maximum burden as expressed in Volt Amps. The total burden includes the input resistance of the wire and connections between the current transformer and meter.

Model No.
A
B
C
D
E
F
G
H
I
J
K
L
M
O
P
Q
R
S
MFO-30
43.5
31
-
41.8
30.5
20.5
10.7
-
-
75
10.7
20.5
30.5
48
-
16.5
82.5
99
MFO-40
43.5
31
-
41.8
41.5
13.3
10.5
-
-
75
13.5
30.6
41.5
48
31
16.5
82.5
99
MFO-60
43.5
31
-
53.4
50.2
22.2
20.7
-
-
99
10.7
50.5
60.3
65
45.8
16
108
124
MFO-100
64
44
31
67
100
80
60
-
8
140
10.5
35.8
41
110
63.4
16.5
133.5
150
RCT-15-1
92
78
35
67
55
45
8
17
14
25
-
-
-
-
-
-
-
-
RCT-15-2
116
100
60
67
57
45
8
17
15
25.5
-
-
-
-
-
-
-
-
RCT-15-3
150
135
91
67
59
45
8
17
15
26.2
-
-
-
-
-
-
-
-
RCT-15-4
178
160
110
72
60
45
8
19
16
26.7
-
-
-
-
-
-
-
-

To Order (* Complete Model No.) Prices Shown in U.S. Dollars
Model No.
Current Ratio
 Window Size.
in (mm)		 Burden VA
Price
MFO30505A
50:5
1.20 (30.5)
2
$20
MFO30605A
60:5
1.20 (30.5)
2
$20
MFO30755A
75:5
1.20 (30.5)
2.5
$20
MFO301005A
100:5
1.20 (30.5)
2.5
$20
MFO301255A
125:5
1.20 (30.5)
2.3
$20
MFO301505A
150:5
1.20 (30.5)
3
$20
MFO402005A
200:5
1.63 (41.5)
5
$21
MFO402505A
250:5
1.63 (41.5)
5
$21
MFO403005A
300:5
1.63 (41.5)
5
$21
MFO404005A
400:5
1.63 (41.5)
5
$24
MFO605005A
500:5
2.37 (60.3)
5
$27
MFO606005A
600:5
2.37 (60.3)
7.5
$31
MFO607005A
700:5
2.37 (60.3)
7.5
$38
MFO607505A
750:5
2.37 (60.3)
7.5
$38
MFO608005A
800:5
2.37 (60.3)
7.5
$38
MFO10010005A
1000:5
3.94 (100)
7.5
$45
MFO10012005A
1200:5
3.94 (100)
10
$53
MFO10015005A
1500:5
3.94 (100)
10
$63
MFO10020005A
2000:5
3.94 (100)
10
$77
MFO10025005A
2500:5
3.94 (100)
10
$95
MFO10030005A
3000:5
3.94 (100)
10
$104

Model No.
Current Ratio
 Window Size.
in (mm)		 Burden VA
Price
RCT151205A
20:5
1.38 (35)
5
$20
RCT151605A
60:5
1.38 (35)
5
$20
RCT151755A
75:5
1.38 (35)
5
$20
RCT1511005A
100:5
1.38 (35)
5
$20
RCT1511255A
125:5
1.38 (35)
5
$20
RCT1511505A
150:5
1.38 (35)
5
$20
RCT1512005A
200:5
1.38 (35)
10
$20
RCT1512505A
250:5
1.38 (35)
10
$21
RCT1513005A
300:5
1.38 (35)
10
$21
RCT1524005A
400:5
2.36 (60)
15
$24
RCT1525005A
500:5
2.36 (60)
15
$27
RCT1526005A
600:5
2.36 (60)
15
$31
RCT1538005A
800:5
3.58 (91)
15
$38
RCT15310005A
1000:5
3.58 (91)
15
$45
RCT15312005A
1200:5
3.58 (91)
15
$53
RCT15415005A
1500:5
4.33 (110)
15
$63
RCT15420005A
2000:5
4.33 (110)
15
$77
RCT15425005A
2500:5
4.33 (110)
15
$90
RCT15430005A
3000:5
4.33 (110)
15
$104

Note: Accuracy is Class 1, Secondary current is 5 A and Power 40 VA.

Ordering Example: MFO10010005A, current transformer with current ratio of 1000:5, $45.
Copyright 2003, NEWPORT Electronics, Inc. All rights reserved.
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