What is dry type transformer called?
Time：2024-11-14 Auther：ZTelec-www.ztelectransformer.com
Dry-type transformers, also known as cast resin transformers, are power transformers with windings encased in epoxy resin. This makes the installation process easier because they are dry and do not require cooling oil. Plus, they do not need to be contained in a fire-proof vault. The layer of epoxy helps protect it against dust and corrosion. Dry-type transformers are used in a wide variety of applications and can be installed indoors or outdoors.
A dry-type transformer has no moving parts, it is a static device that uses environmentally friendly temperature insulation systems. Traditional liquid-type transformers rely on environmentally taxing materials like oil or fire resistant liquid dielectric. “Dry” refers to the fact the system is cooled through natural ventilation as opposed to using oil, silicone or a liquid to cool coils and the electrical core. This type of transformer is defined as “voltage changing,” which means air is cooled instead of cooling liquid. The case the transformer sits inside is ventilated so air can cool coils.
The advantages of dry type transformers
As a type of transformer, dry type transformer has been widely used in power system. Dry transformers have many advantages, so they become the ideal choice for people to choose.
First, dry type transformers have high safety. Because the dry type transformer does not use any oil medium, it can avoid fire and environmental pollution caused by equipment leakage. This makes dry type transformers widely used in high-density population areas, oil and gas fields, petrochemical plants and other places with high safety requirements.
Second, the dry type transformer has excellent heat dissipation performance. The oil-immersed transformer needs to rely on the oil medium for heat dissipation during the working process, while the dry type transformer dissipates heat through natural air or forced ventilation which has a better heat dissipation effect. This makes the dry type transformer can work stably for a long time in harsh environments such as high temperature, humidity and pollution, effectively improving the reliability and life of the transformer.
Third, dry type transformers also have a smaller size and weight. In contrast, oil-immersed transformers need to be filled with a large amount of insulating oil, which increases the size and weight of the equipment, while dry type transformers can be more compact design and layout. This not only saves the floor space, but also facilitates the installation and maintenance of the equipment.
Working environment
1.0 – 40 ( ℃ ), relative humidity <70%;
2. Altitude: no more than 2500 meters;
3. Avoid being exposed to rain, humidity, high temperature, high heat or direct sunlight. There should be a distance of not less than 40cm between its cooling vents and surrounding objects;
4. Avoid working in places with more corrosive liquids, or gases, dust, conductive fibers or metal fines;
5. Prevent work in vibration or electromagnetic interference places;
6. Avoid long-term upside-down storage and transportation, and can not be subjected to strong impact.
Where are dry type transformers used?
Dry type transformers are usually used in the following places:
1.Industrial field: These industrial sites have very high requirements for the stability and reliability of equipment, and once the equipment fails, it may lead to serious production accidents. The dry transformer has excellent stability and reliability, and can adapt to various harsh industrial environments to ensure the normal operation of the power system. At the same time, the dry-type transformer also has the advantages of small size and light weight, which is easy to install and maintain in industrial sites.
2.Commercial buildings: Dry type transformers are also commonly used in commercial buildings, such as office buildings, shopping malls, hotels, etc., for the power supply of buildings.
3.Medical facilities: In medical facilities, dry type transformers are used to power hospitals, clinics and medical equipment.
4.Wind power and solar power generation: Dry type transformers are also used in wind power and solar power generation systems to boost the electrical energy generated by generators and then transmit it to the grid.
5.Railway and metro systems: These places not only have a large flow of people, but also a dense equipment, which requires very high stability and reliability of the power system. Dry type transformer has the characteristics of strong short-circuit resistance, easy maintenance and high operation efficiency, which can ensure the stable operation of the power system and meet the electricity demand of commercial centers and subways.
6.Telecommunications facilities: In telecommunications base stations and communication facilities, dry type transformers are used for power supply and equipment operation.
7.Tall buildings and underground facilities: In high-rise buildings and residential areas, due to the dense population, once the equipment fails, it may cause serious safety accidents such as fire. The dry type transformer does not need oil and does not need to replace the insulating oil, which greatly reduces the safety hazards such as fire and ensures the safety of people’s lives and property.
