Sealed transformer

Product Introduction

1. Iron core: High-magnetic-conductivity sheets with full diagonal seams, stepped overlap, and a polyester tape structure meet the requirements of transformers with minimal load losses and low noise. Vibration-isolating pads are installed between the housing and the oil tank, effectively reducing the transmission of iron core vibration to the oil tank.

2. Winding: High-quality, low-resistance oxygen-free copper is selected and wound on horizontal winding machines and large vertical CNC machines with modern axial and radial compression devices. Reasonable transposition between parallel wires and the use of magnetic shielding to direct leakage flow when necessary effectively reduce transformer load losses. Reasonable insulation design enhances the transformer's surge withstand capacity. Optimization of winding turn distribution, increased radial support and axial compression of windings, the use of pre-treatment with shock absorbers, common winding assembly, and constant voltage drying processes significantly enhance the transformer's surge withstand capacity.

3. Oil tank: utilizing a can or cylinder structure, carbon dioxide protection process, selected sealing materials, and mechanically machined rubber gasket grooves. Combined with strict leakage testing procedures, these measures minimize the likelihood of transformer leakage.

4. The use of finned radiators or new-style air coolers significantly improves the appearance of transformers. The use of cold-pressing equipment for connecting wires during cold pressing improves the cleanliness of the device housing; vacuum treatment and vacuum oiling of transformers effectively reduce partial discharge and i

Confirm the reliability of transformers.

5. A "six-way positioning" structure is adopted between the transformer body and the oil tank to ensure the transformer's resistance to traffic and earthquakes.

6. Surface treatment and coating: The surface of the fuel tank is subjected to fine treatment, including seven processes such as acid washing and phosphating, and is sprayed with special anti-corrosion paint to ensure that the coating does not peel off and does not corrode the steel structural members.

Product Options (Customizable)

This is the main energy saving model of three-phase distribution transformers of class 10 kV with oil immersion inoil andvoltage regulation without excitation.

1. General technical parameters

Voltage combination: 10±5%/0.4kV (widely used), 6/0.4kV, 35/0.4kV

Connection group symbol: Dyn11 (priority), Yyn0

Cooling method: ONAN (oil immersion self-cooling)

Voltage regulation method: non-exciting voltage, ±5% or ±2×2.5%

Insulation level: high voltage LI75kV/AC35kV; low voltage LI20kV/AC8kV

Temperature rise limit: top oil 55K, winding 65K (resistance method)

Working conditions: outdoor/indoor, altitude ≤1000m, ambient temperature -25°C~+40°C

Product Features

· Low no-load losses

Adopts high-quality silicon steel sheet with high permeability and optimized core structure, with low power consumption even under light load.

· Low noise level

The optimized design of magnetic circuits and core stacking ensures low noise during operation, which is suitable for residential areas, factories and other occasions.

· High reliability and long service life

Fully sealed design (S11M) effectively prevents oil leakage and moisture, slows down insulation aging and requires less maintenance.

· Wide application

Suitable for 10kV/0.4kV, 6kV and 35kV power systems.

Wide power range: 10KVA-5000KVA.

Can be used both indoors and outdoors.

· Safe and stable operation

Good ability to withstand short circuit and overload.

It is equipped with a gas relay, a thermometer, a pressure relief device, and other protective mechanisms.

Product benefits

1. Reasonable design: Using modern computing technology to analyze the electrical, magnetic, mechanical and thermal characteristics of transformers, and based on this, design construction drawings, so as to make the product design more reasonable and complete.

2. Advanced Performance: The performance of the product can also be specially designed according to user's requirements.

3. Safe and reliable: Based on the analysis of the electrical, magnetic, mechanical and thermal properties of the transformer, the winding insulation design, ampere type distribution and cooling system are designed to enhance the transformer's ability to withstand overvoltage and short-circuit current without fear of local overheating.

4. Preferred components: Choose high-quality domestic or imported components according to user requirements, which further improves the reliability of the product.

Application scenarios

· Urban and rural power grid

Public distribution transformers for residential areas, streets and rural power grids.

· Industrial and mining enterprises

Factory power supply, workshop distribution, small and medium industrial and mining equipment.

· Commercial and public buildings

Shopping centers, supermarkets, hospitals, schools, office buildings, hotels.

· Infrastructure projects

Roads, bridges, water supply and drainage pumping stations, construction sites.

· New energy support facilities

Photovoltaic power plants, wind energy integration, small-scale power generation and distribution systems.

About Us

Xinda Transformer Co., Ltd. is located at No. 38 Jingsan Road, Fenghuang Industrial Park, Dongchangfu District, Liaocheng City, Shandong Province, China. The company's registered capital is 150 million yuan and covers an area of ​​approximately 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 core enterprise of Dongchangfu District.

The annual production capacity is 9,000 MVA. The total construction area of ​​office buildings, research and development and standardization workshops is 53,000 square meters. Equipped with more than 470 sets of modern production equipment, the company has a production capacity of 10,000 MVA for transformers with voltage up to 220 kV, as well as additionaldistribution equipment systemsWith qualifications in energy general contracting and a specialized technical construction team, Xinda is among the leadingmanufacturers of power transformersin China, excelling in R&D, manufacturing and integrated engineering services.