Current transformers
Current transformers are designed to reduce the current to measurable values proportional to the original primary, without presenting any danger.
Its main qualities are:
- Separates measuring and protection instruments from the high voltage circuit.
- They are ideal for installation at measurement points due to their very high precision.
- Suitable for installation in AC and DC filters in converter substations for high voltage direct current (HVDC) projects.
- Avoid electromagnetic disturbances from strong currents.
- Reduces short-circuit currents to permissible values for appropriate devices.
- Special designs are made under strict collaboration between the client and our design team to obtain the best results.
They are classified into:
- Measuring current transformers.
- Protection current transformers.
Protection current transformers can maintain their linearity at currents higher than the nominal primary current, in the order of 5 to 15 times their primary current, and have an error range of the order of 5% to 10%.
However, measuring transformers maintain their linearity up to 20% of the primary current, and an error range between 0.2% and 3%.
A current transformer isolates the measuring instruments from what may be very high currents in the monitored circuit.

Main Applications:
- Energy meters.
- Network analyzers.
- Capacitor banks.
- Protection relays.
Main sectors:
- Industrial sector.
- Electrical Industry.
- Steel and metallurgical industry.
- Construction
High Quality Current Transformers
In SUESAWe are specialists in the manufacture of current transformers, designed to ensure precision and safety when measuring electrical currents. Our products are manufactured to the highest quality standards, adapting to the needs of different industrial sectors.
What are current transformers?
Current transformers are electrical devices that allow high electric currents to be transformed into more manageable values, facilitating the measurement, monitoring and protection of electrical systems. They are essential for applications where accurate current readings are required.
How does a current transformer work?
A current transformer It is a device that reduces the electric current of a primary circuit to a more manageable level in a secondary circuit, maintaining a proportional relationship. It works by means of a magnetic core that concentrates the flux generated by the primary current, which induces a proportional current in the secondary winding. This design allows high currents to be measured safely and accurately, and is commonly used in protection and measurement systems in electrical networks.
Advantages of SUESA current transformers
- Own manufacturing: Designed and manufactured in our facilities.
- High precision: They guarantee accurate and reliable measurements.
- Durability: Built with high-resistance materials.
- Customized solutions: Adapted to the specifications of each client.
Applications of current transformers
Our transformers are used in a wide range of sectors:
- Industrial sector: Monitoring and protection of electrical machinery.
- Electrical infrastructure: High voltage distribution systems and networks.
- Energy sector: Applications in generating and renewable plants.
- Automation: Industrial automation and control systems.
Technical specifications
Specification | Detail |
---|---|
Operating voltage | Up to 36 kV |
Current range | 50 A to 5000 A |
Precision | Class 0.2, 0.5, 1 |
Material | Steel core and heavy duty insulation |
Why choose SUESA?
At SUESA, we guarantee the highest quality in each product. Our specialized team works to offer customized solutions and ensure that our transformers meet the requirements of each client. Contact us for more information.
SUESA: Manufacturer of current transformers
In SUESA, we are not only suppliers, but we are direct manufacturers of current transformers. This approach allows us to control every stage of the production process, from the initial design to the final product, ensuring superior quality standards and the ability to adapt to the specific needs of our customers.
Our experience as manufacturers allows us to offer reliable products that comply with international regulations and are suitable for critical applications in various industrial sectors.
Advantages of buying directly from a manufacturer
Advantage | Description |
---|---|
Quality control | Rigorous inspection at every stage of production. |
Personalization | Design and specifications tailored to customer needs. |
Competitive prices | No middlemen, offering direct factory prices. |
Fast delivery | Optimized manufacturing and shipping times thanks to our total control of the process. |
Manufacturing process of current transformers at SUESA
At SUESA, we follow a comprehensive manufacturing process that ensures high-quality products:
- Initial design: Requirements analysis and development of custom prototypes.
- Material selection: Use of high quality materials such as steel cores and heavy duty insulation.
- Production: Manufacturing of components using precision machinery.
- Quality tests: Verification of performance and compliance with international regulations.
- Delivery: Safe and punctual transportation to any destination.
Contact SUESA
If you need current transformers If you want to find high quality products for your project, SUESA is your best choice. Contact us today for more information or to request a personalized quote.
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