Power Transformers Versus Distribution Transformers – Know the Differences Between Them

Today’s power applications are absolutely plenty. Many power generation stations, transmission lines, and distribution points are arising day by day to fulfill the power solution needs of such industrial, residential, and commercial sectors. Thereby, it has become essential to develop and design new transformers to look after the voltage regulation.

Power transformers and distribution transformers are the spectacular transformer types fulfilling such voltage needs. Having an outlook on them is really helpful because you can know which type of transformer to purchase, what are the uses, and so on.

Power Transformers Power transformers are the transformers that transfer electrical energy from the main unit to the distribution primary circuits. These will be step-up and step-down transformers based on the applications. They are available in various voltage classes such as 400kV, 200kV, 110kV, 66kV, and 33kV.

Power transformers are generally classified as small, medium, and large power transformers based on the levels of capacities that they can handle.

  1. Small power transformers – Capacities up to 10 MVA
  2. Medium power transformers – Capacities up to 20 MVA
  3. Large power transformers – Capacities above 20 MVA

Those units which deal with higher voltages are even designed with excellent insulation levels so as to cool them and function appropriately.

Distribution Transformers Distribution transformers are the transformers that enable the voltage regulation at the distribution side. As these are for the end user, they are generally step-down transformers. They are available in different ratings like 11kV, 6.6kV, 3.3kV, 433V, 415V, and 230 V.

Different models of oil-cooled distribution transformers are designed nowadays to enable insulation or cooling means. They ensure better safety and protection against over voltage, under voltage, and short circuits.

Both of these transformer types are distinctive and have certain differences.

Differences between Power and Distribution Transformers

Certain factors like the use, place of installation, maintenance of low or high voltages, etc. are helpful to find the differences between these two types of transformers.

  • Size – Considering the huge power applications and dealing of high voltage loads, power transformers are generally designed with larger sizes and huge weights. Distribution transformers are generally smaller in size when compared to that of power transformers.
  • Applications – Power transformers are used in power generation stations, solar power and wind power generation applications, and distribution company substations. They are used to step up and step down the voltage for transmission of heavy loads.

Distribution transformers are used in various industries – they are used in tube mills, rice mills, rolling plants, manufacturing industries, textile industries, food processing units, residential applications, etc. Also, they fulfill the power distribution needs of educational institutions, commercial complexes, telecom centers, and also in certain power plant applications.

  • Iron Losses and Copper Losses

Iron and Copper losses are considerably significant for any type of transformer. These losses occur throughout the day in power transformers whereas they vary in distribution transformers. in distribution transformers, the Iron losses do happen throughout the day whereas Copper losses do change with the load cycle.

  • Load Considerations

The load fluctuations in power transformers are very less but they are very high in distribution transformers. We don’t predict the type of loads used at the distribution end – they may be huge machines or simple household power appliances. So, the load considerations will always vary for the distribution transformers.

  • Core Designing

The designing of the core depends on the mode of the transformers. The core design of power transformers is made so that it operates near to the saturation point of the B-H curve. Whereas, the flux density in the distribution transformers is lower and so the core design is not the same as that of power transformers.

So, when planning to seek a transformer, consider the significance of the applications and then choose the right model. There are many companies in India offering spectacular customized designs of transformers. Servocare by Servomax Limited is one such eminent organization that manufactures and supplies standard and reliable power transformers and distribution transformers across Pan India and abroad for diversified applications.

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