Current Sensors/Transformers
API Technologies offers a wide range of current sensors that measure electrical current (AC&DC) and can transform
current from high to low measurable values. API series 5300 current sensors are available with current ranges from
3.5 Amps to 800 Amps in six subcategories of current transformers. You will find current transformers in advanced
fault tolerant computers and workstations, control panels reading current flowing to electric transformer, telecom
and communications.
Electrical Characteristics
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
RL
Ω
400
200
100
100
33
15
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
Dimensions in inches
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
.1000 100
.1000 100
.1000 100
See Notes on page 2
Current Sensors/Transformers
Electrical Characteristics (cont.)
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
Ip
V/A
RL
Ω
Watt
RS
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
1.375
1.375
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
Potted Dimensions
ID (Min) HT
W
C
.370
.370
.370
.370
.500
.500
.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
.990
.990
.990
.990
1.188
1.188
1.375
1.375
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
.47
.47
.47
.47
.56
.56
.56
.56
.56
.56
.56
.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
0.5
5 .1000 100 .0025 42
1.0 10 .1000 100 .0100 42
1.5 15 .1000 100 .0230 42
2.0 20 .1000 100 .0400 42
2.5 25 .1000 100 .0630 46
3.0 30 .1000 100 .0900 46
4.0 40 .1000 100 .1600 46
5.0 50 .1000 100 .2500 46
6.0 60 .1000 100 .3600 24
7.5 75 .1000 100 .5700 24
10.0 100 .1000 100 1.0000 21
15.0 150 .1000 100 2.2500 11
20.0 200 .1000 100 4.0000 11
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
3.5
5
5
10
10
5
10
15
20
25
30
40
50
60
120
100
200
100
.2000
.1000
.2000
.0500
.1000
.1000
.1000
.1000
.1000
.1000
.1000
.0500
.0500
.0033
.0017
.0050
.0025
.0050
200
100
200
100
200
100
100
100
100
100
100
100
100
1
1
5
5
5
.0025
.0025
.0050
.0025
.0050
76
49
61
213
252
High Accuracy Mini CT
High Accuracy Compact Series
.0025 42
.0100 42
.0230 45
.0400 45
.0630 53
.0900 53
.0400 127
.0630 127
.0400
.0400
.0500
.0500
.0500
2.1
4.5
11
24
17
Digital Metering CT
Flip-Top
53FT01
53FT02
•
•
•
•
•
•
•
•
•
•
20 .0667 220
100 .0250 25
.0100 120
.2500 22
lp: 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 losses
lex and Vex: Excitation Current and Voltage at rated operating conditions
WT: Net weight in pounds
Unless requested, the terminating resistor and the one-turn primary are customer supplied
Pin 3: Normally for mechanical support only, will be used for center-topped designs
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