220 kV oil-filled transformer

I..Product Details

220 kV oil-immersed power transformers are key components in the transmission and distribution systems of ultra-high-voltage power plants. They are primarily used in key applications such as power plant boosters, regional substations, large industrial parks, urban grid hubs, and primary power supplies for rail transport, performing key functions such as voltage conversion, power transmission, grid connection, and power distribution.

This product is designed, manufactured, and tested in strict accordance with GB 1094 Power Transformers, GB/T 6451, IEC 60076, as well as the technical standards of State Grid and China Southern Power Grid. It features low losses, low noise, short-circuit resistance, long service life, and high reliability. It can operate continuously in challenging environments, such as outdoors, indoors, at high altitudes, in highly polluted areas, in extreme cold, and at high temperatures.

The product features a sealed oil-immersed design with a highly integrated iron core, windings, voltage regulation, cooling system, and protection system. The overall design is compact, with reliable insulation, high overload capacity, and minimal maintenance. It is the benchmark for essential equipment in terms of safety, stability, and cost-effectiveness in 220 kV power grids.

II. Operating conditions (customizable)

Altitude: ≤1000m (customizable ≤high altitude type 3000m)

Ambient temperature: -40°C ~ +45°C

Maximum average daily temperature: +30°C

Maximum average annual temperature: +20°C

Outdoor pollution level: Class III, Class IV (customizable anti-pollution type, strong pollution type)

Applicable places: outdoor and indoor, substations, power plants, junction stations, large industrial and mining areas

III.. Structural composition and main components (extremely detailed)

(1) Iron core: low-loss and low-noise materials core

Adopting high quality cold rolled silicon steel sheets with high magnetic permeability and low loss 30Q120/27ZH100.

The surface thermal insulation coating of the iron cores is uniform, with stable thermal performance, and no burrs or rust.

Structural technologies

Full end weld and stepped laminate construction reduce no-load loss and noise.

High strength epoxy tape for general fastening with high rigidity, vibration resistance and low operating noise.

Iron core grounding: Reliable single-point grounding to prevent heating due to multi-point grounding.

Characteristics characteristics

(2) Windings: high short-circuit resistance and high reliability

Conductor materials

High voltage: flat copper wire with paper insulation / electromagnetic wire

Low voltage: copper foil or composite electromagnetic wire with uniform current density

Insulation design

Oil-gap insulation consisting of high-density insulating pressboard, diamond-dotted paper, and spacers.

The main and longitudinal insulation are strictly designed taking into account the impulse voltage of 220 kV with sufficient reserve.

Uniform oil channels between winding and coating layers, good heat dissipation and low partial consumption.

Production process

Continuous pressure drying, vacuum oil dipping, general curing and forming.

The windings are highly concentric, with precise dimensions and balanced ampere turns.

Robust end compression design, with extremely strong resistance to sudden short circuits.

Company Profile

XindaTransformerCo., Ltd. is located at No. 38, Jingsan Road, Fenghuang Industrial Park, Dongchangfu District, Liaocheng City, Shandong Province, China. The company's registered capital is RMB 150 million and covers an area of ​​about 186,667 square meters (280 mu). It is recognized as a national high-tech enterprise, a technological innovation demonstration enterprise of Shandong Province, an excellent private technology enterprise of Shandong Province, a model base for the employment of persons with disabilities, a contract-fulfilling and trustworthy enterprise of Shandong Province, a technology center of Liaocheng Municipal Enterprise, an excellent industrial enterprise of Dongchangfu District, a science and technology demonstration enterprise of Dongchangfu District, and a key enterprise of Dongchangfu District. The annual production capacity is 9,000MVA. The total construction area of ​​office buildings, R&D and standardized workshops is 53,000 square meters. Equipped with more than 470 sets of advanced production equipment, the company has a production capacity of 10,000 MVA for transformers up to 220 kV, and additionaldistribution equipment systems.