Transformers are an essential part of electronic equipment, systems, and devices. There are several different options in transformers, and knowing the factors that make one option a better choice for a given application is essential.
All electrical transformers operate under a similar principle. They are used to transfer power from a source at one voltage and transform it into the voltage required by the system. This is done through a process known as electromagnetic induction.
In most types of equipment, dry type electrical transformers are used. They are cooled by the air, and they do not have to be cooled using liquids. This means they are smaller in size and more compact and can be installed in any type of system. Generally, liquid-filled transformers are used when the voltage is in the range of 500kVA to up to 2.5MKA, and they may be designed specifically for utilities or other similar types of industrial applications.
Choosing Dry Type Transformers
When selecting a dry type of transformer, the specific voltage requirement is a key factor. In selecting a transformer in the correct voltage range, the transformer has a longer duty cycle, and there is no risk of overloading. In applications where there may be sudden spikes in voltage from the main or the source, it is essential to choose the transformer capable of handling the highest possible voltage spike, not the average through the system.
Frequency is also important, as is the voltage required by the load side of the transformer.
Single or Three Phase
There are single and three phase electrical transformers. The single or three phase corresponds to the number of windings. Single phase transformers are ideal for smaller appliances or equipment, but they do not offer the efficiency and power required for industrial equipment and systems. In these cases, the three phase transformer is the right choice.