A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). The main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.

Transformers can be divided into distribution transformers, power transformers, fully sealed transformers, combination transformers, dry transformers, oil immersed transformers, single-phase transformers, furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box type transformer test transformers, corner transformers, high current transformers, excitation transformers, etc. according to their purposes.

Transformers are the basic equipment for power transmission and distribution, widely used in industries, agriculture, transportation, urban communities, and other fields. There are approximately 17 million transformers operating on the grid in China, with a total capacity of approximately 11 billion kilovolt amperes. Transformer losses account for approximately 40% of power transmission and distribution losses, and have significant energy-saving potential. In order to accelerate the promotion and application of high-efficiency energy-saving transformers, improve energy resource utilization efficiency, and promote green, low-carbon, and high-quality development, in January 2021, the Ministry of Industry and Information Technology, the State Administration of Market Regulation, and the National Energy Administration jointly formulated the "Transformer Energy Efficiency Improvement Plan (2021-2023)"

Three phase transformer is a power equipment used to transform three-phase AC voltage. It consists of three independent single-phase transformers, each connected to a phase. In order to input different voltages, the input winding can also use multiple windings to adapt to different input voltages. Multiple windings can also be used to output different voltages. Three independent windings are connected in different ways (such as star or delta) to input a three-phase AC power source, and their output is also the same.

Three phase transformers are mainly used in distribution and transmission systems to adjust voltage levels to meet different power demands. It can reduce high voltage (such as voltage on transmission lines) to low voltage (such as household electricity) or increase low voltage to high voltage (such as industrial electricity). The basic principle is to use mutual inductance to convert the electrical energy at the input end into the electrical energy at the output end, and achieve voltage conversion through the design of the magnetic core and the structure of the winding.

Three phase transformers have the following characteristics:

1. The three-phase transformer has high efficiency and reliability, and can withstand large loads.

Due to the use of three-phase power sources, three-phase transformers are more stable and balanced in transmitting and distributing electrical energy.

3. A three-phase transformer can achieve three-phase symmetrical load distribution in the power system, improving the efficiency and stability of the system.

4. Three-phase transformers typically save more space and cost than single-phase transformers.

Three-phase transformers play an important role in power systems and are widely used in industrial, commercial, and residential fields. Whether it's electricity