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Current Transformers

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Current transformers are very important parts of power grid flow measurement; they can be found in large volumes on all power grids at specific intervals. They are also found mounted on homes and businesses for the purposes of measuring electricity flow; these transformers are fitted with meters that can be easily read by utility workers. Read More…

Current Transformers Current transformers are tools that are used to measure the current, or flow of electricity, in electrical transmission lines. Understanding a current transformer requires an understanding of electrical current. Electrical current is measured in amperes, and one ampere is equal to the movement of 6.241 × 1018 electrons passed a given point per second. While power transformers control voltage, current transformers can measure and control movement for measuring purposes and to help control the flow of electricity to electronic devices.
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Leading Manufacturers

Antigo, WI  |  800-826-9741

We believe in offering the very best to all customers. We offer a full range of transformers, including electric transformers, current, and toroidal transformers.

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Johnson Electric Coil Company $$$

Perris, CA  |  951-277-0757

With more than 500 current transformer manufacturers in the world, Triad Magnetics realizes you have a choice. Why choose Triad? Having served the needs of many industries for more than half a century, Triad believes its experience makes the difference. And if there is one point experience has taught it, it is that it must remain flexible and adaptable to the changing needs of the market.

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Triad Magnetics $$$

McHenry, IL  |  815-344-2900

Lenco Electronics, Inc. specializes in a wide variety of custom electric transformers. Lenco’s success has not come about by accident, but by providing its customers with high-quality products.

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Lenco Electronics, Inc. $$$

Gaobu Town, OVR  |  818-863-9000

22 years in the transformer industry since DELTA Electronics, PROWELL is an EMS provider as well as a leading manufacturer specializing in producing Magnetic LED lighting drivers, power adapters, electric transformers, linear power transformers, toroidal transformers ring core inductors, Experienced in precise die casting mold, plastic injection molding parts and metal sheet stamping in South China , we can cooperate with clients’ engineer to turn design ideas into perfect products. our major marketing is in USA, CANADA and UK.

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Dongguan Winshine Electric Co., Ltd. $$$

Concord, NH  |  800-805-8991

Agile Magnetics proudly manufactures custom transformers, custom inductors, custom coils, and custom magnetic and other assemblies in our state-of-the-art 40,000 sq/ft facility in Concord, New Hampshire, USA. Experts in manufacturing, design, and sourcing, Agile Magnetics is a sophisticated, global resource for magnetics from 2µH to 100KVA and all types of assembly work.

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Agile Magnetics, Inc. $$$
placeholder image Johnson Electric Coil Company Triad Magnetics Lenco Electronics, Inc. Dongguan Winshine Electric Co., Ltd. Agile Magnetics, Inc.

Because of the role they play in the measurement and control of the flow of electricity, current transformers are an essential part of all electricity control and access systems. Current transformers are used to obtain the measure of current in an AC power transducer. Current transformers also retain the ability to transform current to a value suitable for measurement or control. These transformers provide isolation and a step-down current output.

SMD Current Sense Transformer Current Transformers - Triad Magnetics

Accuracy and cost of current transformers depend on core materials. In a current transformer, the wire to be gauged is placed within the opening of the device and a measure of either alternating voltage or alternating current is produced.

The simplest form of a current transformer consists of two coils of wire, electrically insulated from one another and arranged so that a change in the current in one coil (the primary) will produce a change in voltage in the other (the secondary).

The transformers are designed to provide a current in its secondary, which is accurately proportional to the current flowing in its primary. There are several types of current transformers including protective, measuring, air-gapped, anti-remanence, wideband and linear current transformers as well as differing styles including split core and clamp-on current transformers. As is true with all other electricity control and measuring equipment, extra care must be taken when servicing or inspecting current transformers in order to avoid injury or equipment damage.

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