Midwest Current Transformer has been an industry leader in design and production of current transformer products for over 50 years. Our focus is to build quality products designed to meet your needs. You may choose from any of our standard products or we can design and build a custom solution specifically for your application..

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It is the goal of Midwest Current Transformer to maintain its position as a worldwide industry leader . . .

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CT Series Current Transformer

CT Series Current Transformer

The CT Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with 24 inch leads, 600 volt fiberglass insulation wrap and a protective polyurethane coating.

Screw terminals, high voltage insulation, mounting brackets and ratios to 0.1 amp are available. Please specify when placing your order.

RC Series Current Transformer

RC Series Current Transformer

The RC Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with 24 inch leads and a round polycarbonate case.

Mounting brackets and ratios to 0.1 amp are available. Please specify when placing your order.

SC Series Current Transformer

SC Series Current Transformer

The SC Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with brass screw terminals and a square polycarbonate case.

Lead wires instead of screw terminals and ratios to 0.1 amp are available. Please specify when placing your order.

Custom Current Transformer

Custom Current Transformer

Midwest Current Transformer offers you a wide range of current transformers. Should a standard unit not meet your specific application, our experienced staff will design a custom current transformer for you.

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Premier Current Transformer Manufacturing Company

As a premier leader among current transformer suppliers, Midwest Current Transformer has served customers requiring high quality current transformer products for more than five decades. Our targeted focus is the manufacture of standard and custom design current transformer solutions to meet the requirements of a wide range of applications.

Customized Current Transformer Design

We offer pre-made current transformers to serve the needs of various power applications. Our team is able to customize your order in order to help you achieve the optimum current transformer solution in terms of size, ratio, accuracy, multiple taps, contacts, mounting options, and burden rating. Our range of transformers includes: instrument current transformer, multi ratio current transformer, toroidal current transformer, donut type current transformer, current metering transformer and more.

Our Electrical Current Transformer Construction

At Midwest Current Transformer, we manufacture the majority of our current transformers from cold-rolled grain oriented electrical steel (CRGO). The CRGO steel comprising our current transformers is rolled into your required inner and outer diameter dimensions which permits precise dimensioning and tight construction between layers. As an iron-silicon alloy, CRGO electrical steel provides high permeability and low core loss that enables greater efficiency and cost-effectiveness of the current transformer.

Total Quality Management

Our approach consists of Total Quality Management protocol in which our employees, customers, and suppliers are valued as an integral part of our successful process. Our standard for success is error-free performance with the commitment to error prevention and getting-the-job-done-right-the-first-time mindset.

Through hands-on product inspection as part of an entire quality management system, we strive for perfection at every stage of the manufacturing process before your products leave our hands. We push toward continual quality improvement, adherence to safety standards, and personnel development through high-value training across all levels of our operations.

Contact Us

For more information about the superior current transformer products we offer at Midwest Current Transformer, call us today at 800.893.4047 or email sales@aenpi.com.

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Specifications And Use Of Current Transformers For Power Circuits

At Midwest Current Transformer, we specialize in the manufacturing of standard and fully customized current transformers for power circuits. Our products are used to drop down the voltage or current in power circuits to be at a level that can be safely used by measuring equipment.

In order for this type of step down to work and provide accurate measurement, the current transformers have to be precisely designed and manufactured, as any deviations or differences in windings and in current transformer components can result in a negative impact on the accuracy of the measurement of the power through the system.

The Windings

To ensure there is negligible impedance, the primary winding in any current transformer is connected in series with the power circuit. The power system provides the current that passes through the primary winding, which then moves through the secondary winding. The secondary winding usually comprises of increased windings, allowing for the step down of the current or voltage to the required needs for the measuring equipment.

The magnitude of this secondary current through the current transformer is specifically related to the turns ratio between the primary and secondary windings.

Choosing the Current Transformer

The key considerations when using a current transformer in a circuit is to know the voltage output required to make the system safe as it relates to the voltage and current levels.

Through both protective relaying and measurement of the current and voltage, the system circuit switches can be opened or closed, allowing for the protection of equipment being used or connected to the circuit. At the same time, the current transformer has to be selected to match the maximum voltage through the system to prevent core saturation.

Before choosing any current transformer, talk to the experts at Midwest Current Transformer. We can answer your questions and ensure you choose the ideal current transformer for the application.

Common Applications for Current Transformers
The Steps To Choosing The Right Current Transforme...