Engineered with precision cores and high-quality insulation, they provide reliable current scaling for metering and relay applications while maintaining excellent accuracy and low phase error. Built for durability and consistent performance, our CTs support a wide range of industrial and utility applications, ensuring safe integration with protection systems and compliance with industry standards.

Standard and customized current transformers

Etal combines both standard and customized solutions, allowing us to adapt to customer needs. The standard range includes series with different focuses, such as low cost, high accuracy, high output voltage, and precision for high current applications.

In addition to the standard range, we design and manufacture current transformers in all shapes and sizes. With extensive engineering expertise, we develop tailored solutions for customer-specific and application-specific needs. Selecting the right current transformer involves several considerations, and we are here to support you throughout the process.

What is a current transformer?

A current transformer is an instrument transformer in which the secondary current, in normal conditions of use, is substantially proportional to the primary current and differs in phase from it by an angle which is approximately zero.

The principle of operation of a current transformer is the same as that of the power transformer. The current transformer has a primary and a secondary winding. An alternating current flowing in the primary winding induces an alternating current in the secondary winding.

The primary winding may be a single turn or a small number of turns, the secondary winding will have many more turns depending on transformation ratio. The rated transformation is the ratio of the rated primary current to the rated secondary current.