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The Difference between Power Transformer and Distribution Transformer

Jun. 02, 2020


Here we will discuss the difference between power transformers and distribution transformers. This difference is categorized according to factors such as the type of network used, installation location, low-voltage or high-voltage usage, various ratings of power supplies, and distribution transformers on the market.

At the same time, the design efficiency of the transformer core, the design of the core, the type of transformer losses, the operating conditions of the transformer and various applications are also important parameters.

Distribution Transformers

The differences between the two transformers are as follows:

Power transformer

Power transformers are installed at various power stations for power generation and transmission. It acts as a step-up transformer or a step-down transformer, increasing or decreasing the voltage level as needed, and also used as an interconnection between two power stations.

Distribution transformer

Distribution transformers are used to reduce or reduce the voltage and current levels of transmission lines to predetermined levels, which is referred to as the end user's safety level in domestic and industrial use.

The key difference between power transformers and distribution transformers

Power transformers are used for high-voltage transmission networks, and distribution transformers are used for low-voltage distribution networks.

Power transformers in the market have various ratings of 400 kV, 200 kV, 110 kV, 66 kV, 33 kV, and distribution transformers have 11 kV, 6.6 kV, 3.3 kV, 440 V, 230 Volt.

Because the load fluctuation is small, the power transformer always runs at the rated full load, but because the load changes greatly, the distribution transformer is operated at a load lower than the full load.

The maximum efficiency of the power transformer is designed to be 100%. The efficiency is simply calculated by the ratio of output power to input power, while the maximum efficiency of the distribution transformer varies between 50-70% and is calculated by the all-day efficiency.

Power transformers are used in power stations and transmission substations. Distribution transformers are installed in distribution stations. The power in distribution stations comes from industrial and domestic uses.

Compared with distribution transformers, power transformers are larger in size.

In power transformers, iron losses and copper losses occur throughout the day, while in distribution transformers, iron losses occur 24 hours a day, and copper losses depend on the load cycle.

In this way, the power transformer is different from the distribution transformer.

The above information is provided by the distribution transformer substation factory.



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