How to choose the right model of box-type transformers?

How to choose the right model of box-type transformers?

1. Consider the size of the transformer

The size of the transformer should be selected according to the space size of the equipment and the installation environment. The smaller the size, the lower the power is. And the cost may also be reduced accordingly.

When choosing, make sure that the size of the selected transformer is suitable for the installation location, while taking into account the convenience of future maintenance and replacement.

2. Determine the parameters of the transformer

Rated capacity: Rated capacity is one of the important parameters of the box-type transformer, which determines the maximum load that the transformer can withstand. Select the appropriate rated capacity according to actual needs to ensure that the transformer can operate normally and withstand the maximum load.

Rated voltage: Select the rated voltage of the transformer according to the voltage requirements of the equipment. Make sure that the rated voltage of the selected transformer matches the rated voltage of the equipment.

Rated current: Select the rated current of the transformer according to the current requirements of the equipment. If the load current is small, select a transformer with a lower rated current; if the load current is large, select a transformer with a higher rated current.

Rated power: Select the rated power of the transformer according to the power requirements of the equipment. The rated power should be greater than or equal to the maximum power demand of the equipment.

Rated frequency: Select a transformer with the same frequency as the grid. The frequency of most grids is 50Hz or 60Hz.

Short-circuit impedance: Short-circuit impedance reflects the ability of the transformer to withstand short-circuit current. Select the appropriate short-circuit impedance value according to the short-circuit current of the power system to improve the transformer's ability to withstand short-circuit.

Wiring group: The wiring group indicates the connection method of the high-voltage side and the low-voltage side of the transformer. It should be selected according to actual needs.

3. Consider special needs

Shell protection level: Select the appropriate shell protection level according to the installation environment to ensure the protection of the transformer shell against external environments such as dust and water.

Structural type: There are two types of box-type transformers: oil-immersed and dry-type. Oil-immersed transformers have strong tolerance, but require regular maintenance; dry-type transformers do not require maintenance, but may be slightly inferior in tolerance. When choosing, you need to weigh it according to the use environment and actual conditions.

Energy efficiency and noise: Choose transformers that meet environmental protection and energy-saving requirements, as well as models with lower noise to reduce the impact on the environment and personnel.

4. Other considerations

Environmental conditions: Box-type transformers are usually used outdoors or in special environments. So their protection level, temperature resistance, and moisture resistance must meet the actual conditions on site. If the transformer is installed in a high temperature or humid environment, choosing a model with corresponding protection measures will help extend the service life of the equipment.

Price factors: Price is part of the consideration, but it should not be the only basis for decision-making. In the power system, safety and reliability are crucial. By comprehensively comparing the cost-effectiveness of different brands and models, find a product that suits your needs.

Brand and after-sales service: Choosing a box-type transformer from a well-known brand usually means higher quality assurance and stability. At the same time, good after-sales service can provide users with better technical support and maintenance guarantees. It is recommended to check the relevant qualifications and user reviews provided by the manufacturer in order to make a more comprehensive judgment.