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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 1191970 Current measuring transducer ECM-UC-10A-MTCP
Free U.S Ground shipping
$745.62
$621.35
Normally In Stock
Phoenix Contact 1191986 Current measuring transducer ECM-UC-100A-MRTU
Free U.S Ground shipping
$667.00
$555.83
Normally In Stock
Phoenix Contact 1191984 Current measuring transducer ECM-UC-100A-MTCP
Free U.S Ground shipping
$771.83
$643.19
Normally In Stock
Phoenix Contact 1136504 Current measuring transducer ECM-UC-10A-UI
Free U.S Ground shipping
$575.27
$479.39
Normally In Stock
Phoenix Contact 1191969 Current measuring transducer ECM-UC-10A-MRTU
Free U.S Ground shipping
$627.68
$523.07
Normally In Stock
Phoenix Contact 1698172 Current measuring transducer ECM-UC-100A-UI-REL
Free U.S Ground shipping
$680.10
$566.75
Normally In Stock
Phoenix Contact 1136513 Current measuring transducer ECM-UC-100A-UI
Free U.S Ground shipping
$640.79
$533.99
Normally In Stock
Phoenix Contact 1698164 Current measuring transducer ECM-UC-10A-UI-REL
Free U.S Ground shipping
$640.79
$533.99
Normally In Stock
Phoenix Contact 2910322 Coil PACT RCP-D95-5M
Free U.S Ground shipping
$278.88
$232.40
Normally In Stock
Phoenix Contact 2910323 Coil PACT RCP-D95-10M
Free U.S Ground shipping
$326.68
$272.23
Normally In Stock
Phoenix Contact 2904890 Coil PACT RCP-D95
Free U.S Ground shipping
$300.94
$250.78
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 2904892 Coil PACT RCP-D190
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 2904891 Coil PACT RCP-D140
Free U.S Ground shipping
$300.94
$250.78
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 2904895 Holder PACT RCP-CLAMP
Free U.S Ground shipping
$19.38
$16.15
Normally In Stock
Phoenix Contact 1382384 Current transformer PACT SPC-50-1A-D13
Free U.S Ground shipping
$149.66
$124.72
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 1382387 Current transformer PACT SPC-100-1A-D13
Free U.S Ground shipping
$149.66
$124.72
Normally In Stock
Schneider Electric METSEHD300A12L HDPM6000 300A Transformer
Free U.S Ground shipping
$180.92
$150.77
Normally In Stock
Schneider Electric METSEHDP300A12H HDPM6000 Split Core Current Transformer
Free U.S Ground shipping
$180.92
$150.77
Normally In Stock
Schneider Electric METSEHDPM300A5 Strip Solution CT Transformer
Free U.S Ground shipping
$140.52
$117.10
Normally In Stock
Schneider Electric METSEHDPM150A5 High Current Transformer
Free U.S Ground shipping
$127.02
$105.85
Normally In Stock
Schneider Electric METSEHDPM150A16 HDPM6000 Split Core CT
Free U.S Ground shipping
$125.77
$104.81
Normally In Stock
Schneider Electric METSEHDPM125A4 Strip Current Transformer HDPM6000
Free U.S Ground shipping
$66.11
$55.09
Normally In Stock
Schneider Electric METSEHDPM125A10 Strip Current Transformer 125A
Free U.S Ground shipping
$66.11
$55.09
Normally In Stock
Schneider Electric METSEHDPM125A16 Busway Current Transformer
Free U.S Ground shipping
$66.11
$55.09
Normally In Stock
Schneider Electric METSEHDPM6S42W Current Transformer Sets
Free U.S Ground shipping
$4094.24
$3411.87
Normally In Stock
Schneider Electric METSEHDPM6S21WH Current Transformer Monitor
Free U.S Ground shipping
$2046.16
$1705.13
Normally In Stock
Schneider Electric METSEHDPM6S21WF Current Transformer Monitor
Free U.S Ground shipping
$2046.16
$1705.13
Normally In Stock
Schneider Electric METSEHDPM6S21R Current Transformer Monitor
Free U.S Ground shipping
$1503.35
$1252.79
Normally In Stock
Schneider Electric METSEHDPM6S21L Current Transformer For 21-Circuit Monitoring
Free U.S Ground shipping
$1503.35
$1252.79
Normally In Stock
Schneider Electric METSEHDPM400A60 HDPM6000 Split Core CT
Free U.S Ground shipping
$232.91
$194.09
Normally In Stock
Schneider Electric METSEHDPM300A60 HDPM6000 Split Core CT 300A
Free U.S Ground shipping
$223.28
$186.07
Normally In Stock
Schneider Electric METSEHDPM150A60 HDPM Split Core Current Transformer
Free U.S Ground shipping
$209.81
$174.84
Normally In Stock
Schneider Electric METSEHD600A60 HDPM Split Core Current Transformer
Free U.S Ground shipping
$284.89
$237.41
Normally In Stock
Schneider Electric METSEHD4000A30 HDPM6000 Split Core Current Transformer
Free U.S Ground shipping
$722.42
$602.02
Normally In Stock
Schneider Electric METSEHD300A60L HDPM6000 Current Transformer
Free U.S Ground shipping
$252.16
$210.13
Normally In Stock
Schneider Electric METSEHD300A60 HDPM6000 Split Core CT
Free U.S Ground shipping
$199.02
$165.85
Normally In Stock
Schneider Electric METSEHD3000A30L HDPM6000 Split Core CT
Free U.S Ground shipping
$537.01
$447.51
Normally In Stock
Schneider Electric METSEHD2000A30L HDPM6000 2000A Current Transformer
Free U.S Ground shipping
$363.79
$303.16
Normally In Stock
Schneider Electric METSEHD1600A30L HDPM Split Core Current Transformer
Free U.S Ground shipping
$338.80
$282.33
Normally In Stock
Schneider Electric METSEHDPM600A60 HDPM6000 Split Core Current Transformer
Free U.S Ground shipping
$246.38
$205.32
Normally In Stock
Schneider Electric METSEHDPM600A30 HDPM6000 Split Core Transformer
Free U.S Ground shipping
$192.49
$160.41
Normally In Stock
Schneider Electric METSEHDPM75A30H HDPM6000 Split Core Transformer
Free U.S Ground shipping
$109.80
$91.50
Normally In Stock
Schneider Electric METSEHDPM20A30H High Accuracy CT Split Core
Free U.S Ground shipping
$129.10
$107.58
Normally In Stock
Schneider Electric METSEHDPM75A12H HDPM6000 Split Core CT
Free U.S Ground shipping
$95.15
$79.29

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.