Current transformers are indispensable components in electrical systems, covering a wide range of applications and use cases. In this blog post, we take an in-depth look at their function, usage, typical deployment areas, key considerations in their selection, and the various types available on the market.

What Does a Current Transformer Do?

A current transformer, also known as a current transducer, is an electrical device designed to measure electrical current in a circuit and convert it into a proportionally reduced signal suitable for measurement or protection devices. This is achieved through induction, where the primary current in a winding system generates a magnetic flux, which in turn induces a secondary current in another winding. In essence, a current transformer transforms a high primary current into a lower secondary current that is easier to handle.

Why Are Current Transformers Needed?

Current transformers are needed in situations where a large current flow needs to be measured or monitored, but downstream devices or systems can only handle a lower current level. For example, in a circuit breaker or monitoring system, sensors or measuring devices often operate only with lower current levels. A current transformer allows the primary current to be converted into a secondary current suitable for these devices without compromising the integrity of the measurement.

Where Are Current Transformers Used?

The applications of current transformers are diverse, ranging from industrial applications to power grids and renewable energy systems. They can be found in power distribution systems, transformers, circuit breakers, motor controls, monitoring devices, and many other electrical systems. In the energy sector, they are used, for instance, to monitor and control current flow in transmission lines.

Considerations for Current Transformers

When selecting and using current transformers, various factors need to be considered, including the rated current of the primary current and the corresponding design of the secondary current, measurement accuracy, the transformer's burden, ambient temperature, and insulation requirements. It's crucial to carefully review the specifications and ensure that the chosen current transformer meets the application's requirements to ensure accurate and reliable performance.

Types of Current Transformers

There are different types of current transformers that can be used depending on the application's requirements. These include Rogowski coil transformers, ring core transformers, toroidal transformers, and transformers with Hall effect. Each type has its advantages and disadvantages, as well as specific application areas. For instance, Rogowski coil transformers are flexible and well-suited for applications with space constraints or unusual geometries, while ring core transformers are suitable for high currents and high accuracy.

The INT185 Current Transformer by KRIWAN: An Innovative Solution

As a leading provider of sensor technology, KRIWAN offers the INT185 current transformer, enabling precise and reliable current measurement in various applications. With its robust construction, high accuracy, and flexibility, the INT185 is ideal for demanding industrial environments and critical applications. Discover the benefits of the INT185 today and optimize your current measurements with KRIWAN!