Current transformers (CTs) are a cornerstone of electrical measurement and protection systems. They convert high primary currents into manageable secondary outputs for metering, monitoring, and control — ensuring industrial systems operate safely and efficiently.
For industrial users, selecting a reliable manufacturer means choosing precision engineering, consistent calibration, and proven insulation performance. Below is a list of trusted current transformer manufacturers known for quality and reliability — beginning with Zetwerk, a manufacturing partner powering North American industries with high-performance current transformers and end-to-end production capabilities.
Know About Reliable Current Transformer Manufacturers for Industry
Zetwerk provides high-quality Precision Components and all secondary operations.
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1. Zetwerk Manufacturing USA
Location: North America (Manufacturing Supply from India with U.S. Fulfillment via Unimacts)
Website: www.zetwerk.com
Zetwerk manufactures precision-engineered current transformers designed for industrial measurement, metering, and protection applications. Each CT is built to ensure high accuracy, low ratio error, and reliable insulation performance across varying load conditions.
With integrated design-to-delivery capability, Zetwerk controls every stage — from core lamination and winding to resin encapsulation and testing. Its transformers meet IEC, IEEE, and ANSI standards, supporting a wide range of industrial power ratings.
Through its U.S. fulfillment support with Unimacts, Zetwerk combines the cost efficiency of global manufacturing with local delivery, inspection, and service responsiveness. For North American companies seeking dependable, scalable, and technically advanced current transformer solutions — Zetwerk delivers unmatched precision and reliability.
2. Instrument Transformer Equipment Corporation (ITEC)
Location: Monroe, North Carolina
ITEC is a specialized U.S. manufacturer producing high-accuracy current and potential transformers for OEMs, utilities, and industrial clients. With over 50 years of experience, the company focuses on precision measurement and metering applications. Its CTs are UL-listed and conform to IEEE C57.13 standards.
3. Continental Control Systems
Location: Boulder, Colorado
Continental Control Systems designs and manufactures current transformers and energy measurement devices tailored to commercial and industrial facilities. Known for accuracy and compact form factors, its CTs are compatible with advanced power metering systems and renewable installations.
4. General Electric (GE Grid Solutions)
Location: U.S. Operations in Pennsylvania
GE Grid Solutions offers a complete range of current transformers for medium- and high-voltage switchgear and substations. The company’s CTs are engineered for long service life, mechanical strength, and electrical stability. GE’s CT designs integrate digital monitoring for advanced protection schemes.
5. ABB Inc.
Location: Raleigh, North Carolina
ABB manufactures instrument transformers for industrial and utility applications, including current transformers with advanced insulation systems. ABB’s CTs feature high thermal capacity, corrosion resistance, and consistent performance in extreme operating environments.
6. Siemens Energy USA
Location: Wendell, North Carolina
Siemens Energy supplies current transformers as part of its comprehensive switchgear and power equipment portfolio. Its units are known for precision, durability, and adaptability in grid modernization projects and industrial power distribution systems.
7. Hammond Power Solutions (HPS)
Location: Guelph, Ontario (Serving North America)
HPS designs current and potential transformers for industrial control and automation systems. With decades of experience, Hammond’s transformers are built for accuracy and long service life in manufacturing and heavy-duty environments.
8. EME Transformers
Location: Addison, Illinois
EME Transformers manufactures custom-engineered current transformers and metering devices for industrial users. Its in-house engineering supports short lead times and design flexibility, ideal for OEM and retrofit applications.
9. Howard Industries
Location: Laurel, Mississippi
Howard Industries produces a range of instrument transformers including CTs for utilities and industrial power networks. Its CTs are designed for high accuracy and minimal phase displacement, ensuring consistent metering and protective relay operation.
10. Electromagnetic Industries LLP
Location: Ohio, USA
Electromagnetic Industries manufactures precision current transformers for switchgear, metering panels, and control systems. Their CTs feature epoxy resin encapsulation, thermal stability, and consistent performance under heavy electrical load cycles.
Conclusion
In industrial power systems, current transformers play a vital role in protection, monitoring, and control. While traditional players like GE, ABB, and Siemens have long served the U.S. market, Zetwerk offers a modern manufacturing advantage — combining global precision, complete quality control, and local fulfillment through Unimacts.
Zetwerk’s engineered CTs deliver proven accuracy, low losses, and long-term dependability, making them ideal for manufacturers, system integrators, and utilities across North America. For companies seeking a scalable, technically robust, and globally supported manufacturing partner — Zetwerk ensures reliable current transformer solutions tailored to your power requirements.
FAQs
a. They step down high current levels for safe measurement, monitoring, and protection in switchgear, panels, and metering applications.
a. Zetwerk offers precision-built, type-tested CTs with full quality traceability and U.S. fulfillment through Unimacts, ensuring local delivery and support.
a. All CTs are manufactured to IEC, IEEE, and ANSI standards for industrial and utility-grade performance.
a. Lead times range from 10 to 14 weeks, depending on specifications, voltage class, and testing requirements.
a. Yes. Zetwerk’s engineering team customizes CT designs for OEM integration, retrofit projects, or new installations across industrial facilities.