Our range of current transformers includes both single-phase and three-phase options, offering a variety of types to suit different needs. This includes moulded case, measuring, protection, toroidal, saturation, summation, core balanced, split core, and high-accuracy transformers, providing reliable solutions for diverse applications.

Browse our current transformers below:

What is a current transformer?

Current transformers are devices that measure alternating current safely and accurately. They take a high level of electrical current and reduce it to a smaller value that monitoring equipment can read without risk. This gives engineers clear data on energy use, supports circuit protection, and allows them to manage electrical systems without connecting instruments directly to high voltage cables.

Modern electrical systems rely on current transformers to maintain accurate and reliable energy measurements. They allow businesses to measure high electrical loads without investing in large or expensive equipment. Current transformers also form the foundation for energy meters, building management systems, and industrial monitoring technology.

Designed for businesses

Voltek Energy’s current transformers make electrical monitoring safer, more accurate, and more efficient. They let you measure high currents without exposing staff or equipment to dangerous voltages, reducing risk and ensuring compliance with industry standards.

Our MID-certified CT meters give businesses clear visibility of how much power their equipment uses. This helps with energy management, cost control, as well as allowing businesses to spot issues before they turn into faults. When used inside protection systems, current transformers trigger alarms or shut-offs during abnormal conditions, which protect valuable machinery and prevent downtime.

Accurate current transformers also help businesses optimise performance as their data can be used to make decisions around load balancing, equipment upgrades, maintenance planning, and energy-saving initiatives. 

Types of CT Meters

Single Phase Current Transformer

A single-phase current transformer meter is used to monitor standard single-phase electrical systems in a simple and accurate way. These meters are common in small commercial spaces, homes, and any setup where power is supplied through a single phase. They measure how much current is being used, which helps with tracking energy consumption, supporting billing, and monitoring smaller machines or circuits.

Single-phase CT meters are small, easy to install, and work with many types of current transformers. They are often used for sub-metering, electric heating, lighting circuits, and individual pieces of equipment. Their accuracy helps site managers understand how each circuit performs, which makes them useful for improving energy control and reducing waste.

Three Phase Current Transformer

A 3-phase current transformer meter is designed for larger commercial and industrial environments. It measures energy use across three conductors and provides detailed information about how multi-phase electrical systems behave. These meters are commonly used in manufacturing sites, commercial buildings, data centres, and other locations where electrical loads change across different phases.

Three-phase CT meters offer advanced monitoring features such as voltage measurement, detecting imbalances between phases, tracking power factor, and analysing total energy use. This detailed insight helps businesses manage complex electrical setups with confidence and protect equipment that depends on steady power distribution.

Split-core current transformer

A split-core current transformer can be installed without disconnecting any existing wiring. Its core opens and closes around the cable, which makes it a simple retrofit choice for systems that are already in use. This is especially helpful in commercial settings where downtime needs to be avoided.

Split-core transformers are useful for energy audits, temporary monitoring, and long-term metering. They provide flexibility while still maintaining accurate measurements. Their practical design makes them ideal for engineers working in tight spaces or active electrical panels.

Why choose Voltek Energy?

With extensive expertise in energy monitoring and power measurement technology, Voltek Energy provides customers with dependable energy solutions and expert product support. Our highly accurate current transformers are sourced from trusted manufacturers and tested to ensure quality and compliance with industry standards.

We supply MID-certified products that are reliable, easy to install, and suitable for a wide range of commercial and industrial applications. If you are interested in energy meters, be sure to check out our multifunction power meter and DIN Rail meter pages.

If you have any questions at all, please do not hesitate to contact our team.

FAQs

What does a current transformer do?

A current transformer reduces high electrical currents to a smaller, manageable level that meters and monitoring equipment can read safely. It supports accurate energy measurement and protects equipment from electrical risks.

Are your current transformers MID certified?

Yes. Our meters and transformers meet MID certification requirements, which means they deliver accurate, compliant measurements suitable for billing, monitoring, and commercial reporting.

Where are current transformers used?

They are used in commercial buildings, industrial sites, renewable energy systems, data centres, and anywhere reliable current monitoring is required.

What is the difference between single-phase and three-phase CT meters?

Single-phase CT meters suit smaller loads connected to a single supply. Three-phase CT meters support larger systems where power is distributed across three conductors. They are often used in commercial and industrial environments.

Can current transformers help my business reach its sustainability goals?

Yes. Current transformers provide accurate energy data that helps businesses spot waste, improve efficiency, and make informed decisions about energy-saving measures. With clearer visibility of consumption, companies can reduce unnecessary load, lower carbon emissions, and stay aligned with environmental standards and their long-term goals.