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Current Transformers, Transducers & Transmitters

Current transformers are devices that are used when a current is too high to process by electronic equipment or to measure by measuring instruments. A current transformer will “step down" the current from thousands of amperes to a standard output of a known ratio to either 5 Amps or 1 Amp allowing small and accurate instruments to be protected from high currents. There are two main categories of current transformers. Measuring current transformers are used with measuring devices for the magnitude of current, power and energy. Protective current transformers are used with protective equipment such as relays and trip coils in magnetic circuit breakers or miniature circuit breakers.

Current transducers are devices that act as an interface between the power system and the measurement system. They convert any non-standard electrical current input into a usable electrical current output, such as an alternating current (AC) input signal into a direct current (DC) output signal. Current transducers operate by magnetically inducing current from the conductor into a proportional electric current that flows through the current transducer’s conductor. This protects measuring devices from high power currents.

Found 162 items
Filters
Found 162 items
Manufacturer
Eaton (4)
Phoenix Contact (109)
Schneider Electric (49)
Square D (16)
Component
Current Transducer (32)
Current Transformer (116)
Holder (2)
Rogowski Coil (7)
Strip (5)
Monitoring Type
Plug-On Converters (45)
Tube Rod Converter (10)
Monitoring Accuracy Class
Class 1 (62)
Monitoring Approval
UL (1)
Monitoring Input Current Range
0 Amp - 100 Amp (2)
0 Amp - 100 Amp (0 - 50-75-100 Amp) (2)
0 Amp - 12 Amp (1)
0 Amp - 200 Amp (2)
0 Amp - 200 Amp (0 - 100-150-200 Amp) (2)
0 Amp - 300 Amp (2)
0 Amp - 400 Amp (1)
0 Amp - 400 Amp (0 - 200-300-400 Amp) (2)
0 Amp - 5 Amp (2)
0 Amp - 500 Amp (1)
Monitoring Connection Method
Push-In Connection (10)
Screw Connection (79)
Monitoring Circular Conductor Dimensions
0.75 In (1)
18.5 mm (6)
21 mm (10)
28 mm (13)
32 mm (6)
33 mm (11)
42 mm (10)
52 mm (9)
85 mm (2)
Monitoring Primary Rated Current
0 Amp - 100 Amp (2)
0 Amp - 1000 Amp (3)
0 Amp - 125 Amp (2)
0 Amp - 1250 Amp (2)
0 Amp - 150 Amp (3)
0 Amp - 1500 Amp (1)
0 Amp - 200 Amp (5)
0 Amp - 2000 Amp (1)
0 Amp - 250 Amp (6)
0 Amp - 2500 Amp (1)
Monitoring Rated Power
1.25 VA (3)
1.5 VA (8)
10 VA (18)
15 VA (8)
2.5 VA (6)
3.75 VA (3)
5 VA (11)
7.5 VA (6)
Monitoring Supply Voltage
0.33 VAC (1)
12 V DC - 24 V DC (3)
19.2 V AC-DC - 253 V AC-DC (2)
19.2 V DC - 30 V DC (1)
20 V DC - 30 V DC (11)
Normally In Stock
Phoenix Contact 2277132 Current transformer PACT MCR-V2-4012- 70- 600-5A-1
Free U.S Ground shipping
$70.61
$58.84
Normally In Stock
Phoenix Contact 2308072 Universal current transducer MCR-SL-CUC-400-I
Free U.S Ground shipping
$630.41
$525.34
Normally In Stock
Phoenix Contact 2910324 Coil PACT RCP-D190-10M
Free U.S Ground shipping
$326.68
$272.23
Normally In Stock
Phoenix Contact 2277954 Current transformer PACT MCR-V2-6015- 85-1000-5A-1
Free U.S Ground shipping
$81.29
$67.74
Normally In Stock
Phoenix Contact 2277815 Current transformer PACT MCR-V2-3015- 60- 60-5A-1
Free U.S Ground shipping
$55.49
$46.24
Normally In Stock
Phoenix Contact 2308043 Universal current transducer MCR-SL-CUC-300-I
Free U.S Ground shipping
$515.94
$429.95
Normally In Stock
Phoenix Contact 1382378 Current transformer PACT SPC-20-1A-D13
Free U.S Ground shipping
$149.66
$124.72
Normally In Stock
Phoenix Contact 2902990 Measuring transducer PACT RCP-4000A-1A
Free U.S Ground shipping
$321.13
$267.61
Normally In Stock
Phoenix Contact 2905882 Current transformer PACT MCR-V2-4012-70-250-1A-1
Free U.S Ground shipping
$65.72
$54.77
Normally In Stock
Phoenix Contact 2904895 Holder PACT RCP-CLAMP
Free U.S Ground shipping
$19.38
$16.15
Normally In Stock
Phoenix Contact 2907888 Holder PACT RCP-CLAMP-5-10
Free U.S Ground shipping
$19.38
$16.15
Normally In Stock
Phoenix Contact 2904891 Coil PACT RCP-D140
Free U.S Ground shipping
$300.94
$250.78
Normally In Stock
Phoenix Contact 1033482 Coil PACT RCP-D140-10M
Free U.S Ground shipping
$326.68
$272.23
Normally In Stock
Phoenix Contact 2904892 Coil PACT RCP-D190
Free U.S Ground shipping
$300.94
$250.78
Normally In Stock
Schneider Electric PCSPCT7RL7515 ACU sine 750/5 Current Transformer
Free U.S Ground shipping
$717.23
$597.69
Normally In Stock
Schneider Electric PCSPCT7RL8011 AccuSine Current Transformer
Free U.S Ground shipping
$1186.76
$988.97
Normally In Stock
Phoenix Contact 2308098 Universal current transducer MCR-SL-CUC-600-I
Free U.S Ground shipping
$630.41
$525.34
Normally In Stock
Phoenix Contact 2813499 Current measuring transducer MCR-SL-S-200-I-LP
Free U.S Ground shipping
$485.88
$404.90
Normally In Stock
Phoenix Contact 2864464 Current monitoring MCR-SL-S- 16-SP- 24
Free U.S Ground shipping
$377.45
$314.54
Normally In Stock
Phoenix Contact 2308108 Universal current transducer MCR-SL-CUC-100-U
Free U.S Ground shipping
$487.34
$406.12
Normally In Stock
Phoenix Contact 2810638 Current measuring transducer MACX MCR-SL-CAC-12-I-UP
Free U.S Ground shipping
$465.71
$388.09
Normally In Stock
Phoenix Contact 2810612 Current measuring transducer MACX MCR-SL-CAC- 5-I
Free U.S Ground shipping
$441.32
$367.77
Normally In Stock
Phoenix Contact 2813509 Current measuring transducer MCR-SL-S-400-I-LP
Free U.S Ground shipping
$485.88
$404.90
Normally In Stock
Phoenix Contact 2308027 Universal current transducer MCR-SL-CUC-100-I
Free U.S Ground shipping
$506.72
$422.27
Normally In Stock
Phoenix Contact 2814359 Current measuring transducer MCR-SLP-1-5-UI-0
Free U.S Ground shipping
$448.91
$374.09
Normally In Stock
Phoenix Contact 2810625 Current measuring transducer MACX MCR-SL-CAC- 5-I-UP
Free U.S Ground shipping
$511.93
$426.61
Normally In Stock
Phoenix Contact 2814728 Current measuring transducer MCR-S10-50-UI-DCI-NC
Free U.S Ground shipping
$745.43
$621.19
Normally In Stock
Phoenix Contact 2308030 Universal current transducer MCR-SL-CUC-200-I
Free U.S Ground shipping
$506.72
$422.27
Normally In Stock
Eaton IQ35M-SP-075-100 Current Transducer
Free U.S Ground shipping
$334.40
$278.67
Normally In Stock
Eaton PXMP-CS125-3 Current Transformer Sensor Kit
Free U.S Ground shipping
$252.08
$210.07
Normally In Stock
Eaton PXMP-CS250-3 Current Transformer Sensor Kit
Free U.S Ground shipping
$286.27
$238.56
Normally In Stock
Eaton PXMP-CS400-3 Current Transformer Sensor Kit
Free U.S Ground shipping
$410.41
$342.01
Normally In Stock
Schneider Electric PCSPCT7RL6015 AccuSine Current Transformer
Free U.S Ground shipping
$1186.76
$988.97
Normally In Stock
Schneider Electric PCSPCTFCL15001R Rectangular Split-Core Current Transformer
Free U.S Ground shipping
$5025.10
$4187.58
Normally In Stock
Schneider Electric PCSPCTFCL2500511 Round Split-Core Current Transformer
Free U.S Ground shipping
$7264.15
$6053.46
Normally In Stock
Schneider Electric PCSPCTFCL50056 Round Split-Core Transformer
Free U.S Ground shipping
$3812.30
$3176.92
Normally In Stock
Schneider Electric TRAI2000SC07 Square D Split Core CT
Free U.S Ground shipping
$4623.83
$3853.19
Normally In Stock
Schneider Electric TRAI2500SC07 Square D Split Core Transformer
Free U.S Ground shipping
$4623.83
$3853.19
Normally In Stock
Schneider Electric TRAI4000SC07 Square D ReactiVar Split Core Transformer
Free U.S Ground shipping
$4843.99
$4036.66
Normally In Stock
Schneider Electric TRAI4000SC11 Square D Split Core Transformer
Free U.S Ground shipping
$4843.99
$4036.66
Normally In Stock
Schneider Electric METSECTSP5A4240U PowerLogic Split Core CT
Free U.S Ground shipping
$413.09
$344.24
Normally In Stock
Schneider Electric METSECTLV4240U PowerLogic Split Core Current Transformer
Free U.S Ground shipping
$440.59
$367.16

Transformer Basics

What is a Transformer?

Transformers take one type of voltage and convert it to a different kind of voltage. The amount of energy being used stays the same. When voltage is increased or decreased by a transformer, the amount of energy is not increasing or decreasing, it is simply changing the way the energy is being used. Ohms law (V=IR) shows that the current will change proportionally to the voltage. Therefore when voltage increases, amperage decreases. When voltage decreases, amperage increases. A transformer can take any type of AC voltage and change that voltage either up or down. For example, power companies use transformers to change the voltage from a very high, dangerous voltage down to a level that can be safely used in homes. In industrial applications, transformers step down voltage from 480VAC to 120VAC to use in control circuits.