Common sizes of dry-type transformers
Time：2025-01-14 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.
What is the size of dry-type transformer?
Common sizes of dry-type transformers vary depending on the power and voltage level.
1.Common size ranges
10kV dry-type transformer and a capacity of 500kVA: The dimensions are approximately 1.13 meters long, 0.95 meters wide, and 1.38 meters high.
35kV dry-type transformer and a capacity of 3150kVA: The dimensions are approximately 2.5 meters long, 1.5 meters wide, and 2.8 meters high.
2.Factors of affecting dry-type transformer size
Power: Power is the main factor affecting the size of dry-type transformers. The greater the power, the more core and coil material is required, which results in an increase in size.
Voltage level: Transformers with high voltage levels require thicker insulation materials and greater safety distances, so the size is relatively large.
Design standards: Design standards may vary in different countries or regions, resulting in differences in the size of dry-type transformers with the same power and voltage level.
How do I choose a transformer size?
Dimensional standards: The size of dry-type transformers usually follow a specific standard size range to ensure that they are suitable for installation and use in different scenarios. For example, a typical 1000KVA dry-type transformer may have a size of 1900mm × 1120mm × 1170mm. When selecting the size, the rated capacity, insulation grade and other technical parameters of the transformer also need to be considered to ensure its performance and safety in specific scenarios.
Installation space: When selecting the overall size of the transformer, the installation space of the transformer needs to be fully considered, including the working area and ventilation requirements around the transformer. Ensure that there is enough space around the transformer for installation, maintenance and heat dissipation. At the same time, the spacing requirements between the transformer and surrounding equipment or buildings should be considered to ensure safe operation and maintenance.
Transportation conditions: The transportation conditions of the transformer need to be considered, including the size restrictions of the transport vehicle and the requirements of road transportation. Make sure that the selected size meets the load and size restrictions of the transport vehicle to avoid problems and safety risks during transportation.
