When dealing with electrical equipment, it's important to evaluate the protection and safety needs of electrical loads. In this sense, the choice between an autotransformer and an isolation transformer is a relevant issue.
After all, both have the same purpose of transmitting electrical power, but their applications and characteristics are distinct. In this article, we'll highlight the differences between these devices and their applications to help you choose the best one for your needs. Let's dive in!
Autotransformer: what it is, what it is for and its advantages
An autotransformer is a device consisting of a single winding around a ferromagnetic core. It is used to increase or decrease the voltage required for the equipment or systems it powers.
Therefore, it is important to protect the equipment components, preventing overload or power outages.
For example, if you plug a computer designed for 127V into an unprotected 220V outlet, it could overload and damage its parts.
With the use of the autotransformer, it will balance the energy and protect the equipment, allowing its normal and effective use.
Therefore, the advantages of the autotransformer include: its simplicity, lower cost and smaller size compared to isolation transformers.
Isolation transformer: what it is, what it is for and its advantages
The isolation transformer has a ferromagnetic core and two or more separate coils wound around it. It provides power safety and quality through galvanic isolation between the primary and secondary systems.
In this way, it is used to match voltages and attenuate noise from the power input, functioning as a filter and protecting the loads.
Furthermore, it also has the function of delivering the neutral, in addition to minimizing the effects of harmonics present in the network.
Although it's more expensive to purchase, its advantages include extra protection, quality electrical power, and neutral delivery when needed. Furthermore, it's a robust component, with two coils for added protection.
Autotransformer or isolation transformer: which one to choose?
To choose between an autotransformer and an isolation transformer, it is important to evaluate the protection and safety needs of electrical loads, the installation location of the equipment and the quality of the electrical power supply.
The autotransformer is indicated for simple voltage adjustments and does not present galvanic isolation between the primary and secondary windings, working with the principle of self-induction.
The isolation transformer is more reliable and effective in systems sensitive to harmonics and residual currents, featuring physical separation and an insulating material that promotes even greater insulation.
The isolation transformer is larger and more expensive than the autotransformer, but offers greater protection and power quality.
Therefore, while the autotransformer is used for simple voltage adjustments, the isolation transformer is used in situations that require extra insulation.
Find autotransformers and transformers ready for delivery at Trifásica Elétrica
Trifásica Elétrica is a company that offers autotransformers and transformers for all power and voltage requirements for different types of projects—commercial, residential, solar, and custom projects. We also offer customized solutions to meet each client's specific needs.
One of the main advantages of purchasing from us is that we deliver immediately nationwide, ensuring that customers receive their orders quickly and efficiently.
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