Voltage transformer (VT) and current transformer (CT): learn everything

These devices play an essential role in the measurement and transmission of electrical voltage and current.

The voltage transformer reduces the voltage of a high voltage system to a lower value, allowing precise and safe measurements.

The current transformer, on the other hand, transforms high-value electrical currents into smaller currents, suitable for measuring instruments.

If you want to know more about these devices and how they contribute to the efficiency and safety of the electrical system, join us on this learning journey! Let's go?

Voltage transformers

The voltage transformer (VT) is a device used to measure and reduce the electrical voltage of a high voltage system.

It works based on the principles of electromagnetic induction, where the voltage applied to the primary coil generates a magnetic field that induces a proportional voltage in the secondary coil.

Thus, this allows the reduction of the voltage to a lower value, facilitating precise measurement by instruments.

In this way, the VT plays an essential role in power distribution systems, substations, and electrical voltage measurement.

See what the benefits of the voltage transformer are

Voltage transformers offer several benefits. After all, they allow precise measurements, ensuring the safety of sensitive measuring equipment.

In addition, they reduce voltages, making the operators' work safer and protecting the equipment.

They also provide galvanic isolation and protection against overvoltages, contributing to the integrity of measurement and control devices.

Finally, their versatility allows their application in a wide range of electrical systems.

Current transformer

The current transformer (CT) is used to measure and transmit high-value electrical currents to lower values.

It operates based on electromagnetic induction, where the primary current generates a proportional magnetic field, transferred to the secondary winding through a ferromagnetic core.

The secondary winding produces a secondary current proportional to the primary, according to the transformation ratio determined by the number of turns in the windings.

In this way, they play an essential role in electrical current measurements. In addition, they provide suitable currents for measuring instruments and electronic devices.

Discover the benefits of the current transformer

CTs play a fundamental role in the precise and safe measurement of electrical current.

Did you enjoy learning more about voltage transformers?

At Trifásica Elétrica we offer complete solutions with voltage transformers, current transformers, medium voltage circuit breakers, and other materials for primary substations.