What is a dry type transformer?
Definition: Dry type transformer refers to the transformer whose iron core and winding are not impregnated in insulating oil. It uses the principle of magnetic induction and electromagnetic induction to transform the input voltage into the output voltage through the magnetic field coupling between the primary and secondary windings in a free air environment.
Structure: The dry type transformer is mainly composed of an iron core composed of silicon steel sheets and an epoxy resin cast coil. Insulation tubes are placed between the high and low coils to increase electrical insulation and the coils are supported and restrained by a pad. The fasteners of the overlapping parts have anti-loosening performance.
Why use a dry type transformer?
The reasons for using dry transformers are mainly based on their various advantages and application scenarios. The following is a detailed analysis of the reasons for using dry type transformers:
Good fire performance
1.Refractory materials: Insulation materials used in dry type transformers are refractory materials such as resins, which are not easy to burn in a fire and will not support combustion.
2.No risk of fire expansion: In operation, if the transformer fails and causes a fire, the dry type transformer will not expand the fire situation, thereby avoiding greater losses.
Environmental protection and pollution-free
No harmful gases: Dry type transformer does not contain oil, so it will not produce harmful gases in operation. It is harmless to the environment and human health.
No leakage pollution: Compared with oil-immersed transformers, dry type transformers do not have leakage oil problems. It will not cause pollution to the environment.
Easy maintenance
1.Maintenance-free or less maintenance: Dry type transformers usually operate with relatively little maintenance and overhaul work. And it can even be maintenance-free and reducing maintenance costs.
2.No oil inspection: Oil inspection and replacement is not required, reducing the maintenance workload and maintenance difficulty.
Strong adaptability
1.High temperature environment adaptability: In high ambient temperature occasions such as oil refineries, steel plants and other industrial places, dry type transformers can better adapt to high temperature environment and improve the service life of the transformer.
2.Can be installed indoors and outdoors: Dry transformers are generally installed indoors, but can also be made into outdoor, such as installed in box-type substation.
Dry-type-transformer other advantages
1.Low loss, low noise: Dry type transformer has the characteristics of low loss and low noise, which is conducive to energy saving and noise reduction.
2.Good insulation performance: No partial discharge, strong lightning impact resistance, which can improve the safety and reliability of the transformer.
3.Good mechanical strength: The dry type transformer is resistant to temperature change and short circuit, which ensures the stable operation of the transformer.
Dry transformer application scenarios
Occasions with high fire protection requirements: For example , in high-rise buildings, subways and other public places, the use of dry type transformers can greatly reduce the risk of fire.
Occasions with high air quality requirements: For example , in hospitals, laboratories and other places, the use of dry type transformers can better ensure environmental safety.
Occasions that require easy maintenance: For example , in high altitude areas, areas away from cities, etc., the use of dry type transformers can be more convenient for maintenance and maintenance.
Leave A Comment