Current Sense Transformers
API Technologies offers a wide range of current sense transformers that measure electrical current (AC &
DC) and can transform current from high to low measurable values. API series 5300 current sense
transformers are available with current ranges from 3.5 Amps to 800 Amps in six subcategories of current
sense transformers. You will find current sense transformers in advanced fault tolerant computers and
workstations, control panels reading current flowing to electric transformer, telecom and communications.
Part No.
5300-0005
5300-0010
5300-0020
5300-1030
5300-2050
5300-3011
5300-0405
5300-0410
5300-0420
VL
2.0
2.0
2.0
3.0
2.5
2.5
0.5
1.0
2.0
Ip
5
10
20
30
50
100
5
10
20
V/A
.4000
.2000
.1000
.1000
.0500
.0250
.1000
.1000
.1000
RL
Ω
400
200
100
100
33
15
100
100
100
Watt
.0100
.0200
.0400
.0900
.1890
.4170
.0025
.0100
.0400
RS
79
83
85
44
17
8
84
85
86
RCF
@10%
1.093
1.048
1.027
1.023
1.015
1.009
1.064
1.050
1.040
Iex
µARMS
572
608
731
853
1510
1650
281
440
689
Vex
VRMS
2.38
2.83
3.70
4.32
3.76
3.88
0.92
1.85
3.72
Wt.
Lb.
.019
.019
.019
.040
.062
.117
.019
.019
.019
L
.660
.660
.660
.931
.931
1.187
.660
.660
.660
ID (Min)
.177
.177
.177
.370
.370
.500
.177
.177
.177
Potted Dimensions
HT
W
C
D
.795
.795
.795
.990
.990
1.219
.795
.795
.795
.37
.37
.37
.50
.72
.72
.37
.37
.37
.50
.50
.50
.60
.60
.80
.50
.50
.50
-
-
-
.30
.30
.40
-
-
-
Fig
3
3
3
2
2
2
3
3
3
Standard Accuracy Mini CT
Wide Range Mini CT
Electromagnetic Integrated Solutions
8061 Avonia Road ● Fairview ● Pennsylvania ● 16415
Phone: (814) 474-1571 ● Email: eisSales@apitech.com ● Web: http://eis.apitech.com
Page 1 of 2
Current Sense Transformers
Part No.
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5326
5327
5328
5329
5330
5351
5352
5353
5354
5355
5356
5300-4240
5300-4250
5381
5382
5383
5384
5385
VL
0.5
1.0
1.5
2.0
2.5
3.0
4.0
5.0
6.0
7.5
10.0
15.0
20.0
0.7
0.5
1.0
0.5
1.0
0.5
1.0
1.5
2.0
2.5
3.0
2.0
2.5
0.2
0.2
0.5
0.5
0.5
1.3
2.5
•
•
•
•
•
•
•
•
•
•
Ip
5
10
15
20
25
30
40
50
60
75
100
150
200
3.5
5
5
10
10
5
10
15
20
25
30
40
50
60
120
100
200
100
20
100
V/A
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.2000
.1000
.2000
.0500
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.0500
.0500
.0033
.0017
.0050
.0025
.0050
.0667
.0250
RL
Ω
100
100
100
100
100
100
100
100
100
100
100
100
100
200
100
200
100
200
100
100
100
100
100
100
100
100
1
1
5
5
5
220
25
Watt
.0025
.0100
.0230
.0400
.0630
.0900
.1600
.2500
.3600
.5700
1.0000
2.2500
4.0000
.0025
.0025
.0050
.0025
.0050
.0025
.0100
.0230
.0400
.0630
.0900
.0400
.0630
.0400
.0400
.0500
.0500
.0500
.0100
.2500
RS
42
42
42
42
46
46
46
46
24
24
21
11
11
76
49
61
213
252
42
42
45
45
53
53
127
127
2.1
4.5
11
24
17
120
22
RCF
@10%
1.041
1.034
1.030
1.028
1.020
1.018
1.020
1.019
1.018
1.016
1.014
1.011
1.009
1.030
1.015
1.013
1.006
1.009
1.033
1.019
1.016
1.011
1.009
1.008
1.012
1.010
1.013
1.006
1.008
1.004
1.009
1.030
1.014
Iex
µARMS
237
386
513
628
566
644
914
1090
1250
1520
1740
1820
2340
88
183
158
74
58
65
108
143
189
193
249
267
542
1230
520
200
97
450
20
22
Vex
VRMS
0.66
1.32
1.99
2.65
3.65
4.38
5.82
7.28
7.41
9.26
12.00
16.60
22.20
0.97
0.74
1.31
1.57
2.26
0.707
1.41
2.13
2.89
3.83
4.60
4.54
5.65
0.62
2.64
2.14
2.40
2.15
2.07
4.64
Wt.
Lb.
.040
.040
.040
.040
.088
.088
.105
.105
.129
.129
.191
.442
.300
.028
.015
.028
.015
.028
.055
.055
.082
.082
.120
.120
.120
.120
.100
.120
.320
.390
.120
.230
.350
L
0.931
0.931
0.931
0.931
1.188
1.188
1.38
1.38
1.500
1.500
1.750
2.188
2.188
.660
.660
.660
.660
.660
1.060
1.060
1.250
1.250
1.375
1.375
1.870
1.870
1.500
1.500
2.370
2.370
1.870
1.750
1.800
ID (Min)
.355
.355
.355
.355
.460
.460
.625
.625
.688
.688
.750
.938
.938
.177
.177
.177
.177
.177
.188
.188
.375
.375
.500
.500
1.000
1.000
.688
.688
.770
.770
1.000
.380
.812
Potted Dimensions
HT
W
C
.990
.990
.990
.990
1.22
1.22
1.38
1.38
1.500
1.500
1.750
2.188
2.188
.795
.795
.795
.795
.795
1.060
1.060
1.250
1.250
1.370
1.370
1.870
1.870
1.500
1.500
2.370
2.370
1.870
1.800
2.300
.492
.492
.492
.492
.56
.56
.56
.56
.56
.56
.61
.81
.81
.72
.37
.72
.37
.72
.56
.56
.56
.56
.62
.62
.56
.56
.56
.56
.75
.75
.56
.85
.85
.60
.60
.60
.60
.80
.80
1.00
1.00
1.20
1.20
1.40
1.80
1.80
.50
.50
.50
.50
.50
0.80
0.80
1.00
1.00
1.00
1.00
1.50
1.50
-
-
-
-
-
-
-
D
.30
.30
.30
.30
.40
.40
.40
.40
.40
.40
.40
.50
.50
.32
-
.32
-
.32
.40
.40
.40
.40
.50
.50
.50
.50
-
-
-
-
-
-
-
Fig
2
2
2
2
1
1
1
1
1
1
1
1
1
2
3
2
3
2
1
1
1
1
1
1
1
1
-
-
-
-
-
-
-
Standard Accuracy Economy Series
High Accuracy Mini CT
High Accuracy Compact Series
Digital Metering CT
Flip-Top
53FT01
53FT02
Ip: Primary Current
V/A: Output volts per input amps
RL: Terminating resistor
N: Nominal turns
Rs: Winding resistance
RCF (Ratio Correction Factor): Current readings should be multiplied by this factor to compensate for the effect of transformer loss
Lex and vex: Excitation Current and Voltage at rated operating condition
WT: Net weight in pounds
Unless requested, the terminating resistor and one-turn primary are customer supplied
Pin 3: Nominally for mechanical support only, will be used for center-topped designs
Electromagnetic Integrated Solutions
8061 Avonia Road ● Fairview ● Pennsylvania ● 16415
Phone: (814) 474-1571 ● Email: eisSales@apitech.com ● Web: http://eis.apitech.com
Page 2 of 2