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Types Of Dry Type Transformer
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Industry News
Release time:
2025-02-18
Dry transformers are widely used in high-rise buildings, airports, docks, CNC machinery and equipment, and flammable and explosive special places. Simply put, a dry transformer refers to a transformer whose core and winding are not immersed in insulating oil. According to different design requirements and usage environments, dry transformers can be divided into many types, and their classification will be introduced in detail below.
Classification by insulation process
Immersed dry transformer
The impregnated dry transformer produced by our company uses H-level or C-level insulating materials (such as Nomex paper) to penetrate high-temperature-resistant resin into the winding gap through vacuum pressure immersion (VPI) process to form a dense insulating layer. This process improves the heat dissipation efficiency and overload capacity of the transformer, and is suitable for high-humidity and high-pollution environments such as chemical plants and mines. Typical models such as SC (B) H series can operate stably in high temperature environments above 180°C and can withstand instantaneous overload impact.
Epoxy resin cast dry transformer
The core feature of the epoxy resin cast dry transformer is a fully sealed structure. After using high-voltage windings, it is vacuum cast and cured to form through epoxy resin. According to whether fillers such as quartz powder are added, they can be divided into two categories: fillers and no fillers. Fillable type (such as SCB11 series) Higher mechanical strength and suitable for harsh environments; Fillable type Because its pure epoxy resin packaging has excellent earthquake resistance, it is often used in dynamic loads such as subways and ships. Larger place. This type of transformer has excellent moisture-proof and explosion-proof performance, operating noise is less than 65dB, and requires almost no maintenance.
Not encapsulated winding dry transformer
The insulation process of non-encapsulated winding dry transformers is relatively simple. The winding surface is only coated with multiple layers of C-level insulating paint, and is not fully encapsulated. Its open heat dissipation structure makes its instantaneous overload capacity reach 150%. This type of transformer is especially suitable for data centers, photovoltaic power stations, and other occasions where load fluctuations are frequently needed, but the cleanliness of the installation environment is high.
Classification by winding material and design
Copper winding dry transformer
Due to the excellent conductivity of copper materials, the copper winding dry-type transformer can effectively reduce no-load loss by 15% to 20%. Therefore, it is the first choice for places with high energy efficiency requirements such as commercial buildings and high-end medical facilities.
Aluminum winding dry transformer
Aluminum winding dry-type transformer By using aluminum instead of copper, it can not only reduce the cost by 30% to 40%, but also reduce the weight of the equipment. It is a more cost-effective option in industrial projects with limited budgets.
Foil winding dry transformer
Foil winding dry transformer Redesign the winding structure using copper foil or aluminum foil layer winding technology, evenly distribute the interlayer capacitance, significantly improving the anti-harmonic capability (THD ≤5%). This feature gives it an irreplaceable advantage in areas such as semiconductor production lines and precision medical equipment that strictly require power quality.
In the technological development of dry transformers, AISITE has always focused on the highest insulation reliability, material economy and scenario adaptability. Whether it is the full seal protection of epoxy resin or the precise suppression of harmonics by foil windings, they all reflect the industrial logic of "demand-driven technology iteration". In the actual selection process, users need to comprehensively weigh the load characteristics, environmental conditions and long-term operation and maintenance costs to achieve optimal configuration.
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