Hermetic transformer

Product Introduction

1. Rron core: sheets with high magnetic conductivity, full diagonal seams, step-lap joints, and polyester tape structure to meet the requirements of transformers with minimal load losses and low noise levels. Vibration isolation pads are installed between the core and the oil tank, which more effectively reduces the transmission of core vibration to the oil tank.

2. Winding: High-quality oxygen-free copper with low resistance is selected, which is 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 flux when necessary effectively reduce the load losses of the transformer. The insulation structure is reasonably designed to enhance the transformer's ability to withstand overvoltages; optimizing the winding turn distribution, increasing radial support and axial compression of the windings, and using pre-treatment with amorphous blocks, common winding assembly, and constant voltage drying processes significantly improve the transformer's ability to withstand short-circuit currents.

3. Oil tank: adopts a bell-type or cylindrical structure, carbon dioxide protection process, selection of sealing materials, and mechanical processing of the rubber gasket groove. Combined with strict leak testing procedures, these measures minimize the likelihood of transformer oil leakage.

4. The use of plate-type radiators or new-type air coolers significantly improves the appearance of transformers. The use of cold pressing equipment for wire connections during cold pressing has enhanced the cleanliness of the device body; vacuum treatment and vacuum oil filling of transformers effectively reduce the partial discharge level and

Confirm the reliability of transformer operation.

5. A 'six-direction positioning' structure is applied between the transformer body and the oil tank to ensure the transformer's resistance to transportation impacts and earthquakes.

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

Product parameters (customizable)

This is the main energy-saving model of three-phase oil-immersed distribution transformers of the 10 kV class withoil andoff-circuit voltage regulation.

1. General technical parameters

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

Connection group symbol: Dyn11 (priority), Yyn0

Cooling method: ONAN (self-cooling, oil-immersed)

Voltage regulation method: off-circuit tap changer, ±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)

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

Product Features

· Low no-load losses

Uses high-quality high-permeability silicon steel sheet and optimized core structure, with low energy consumption even at light load.

· Low noise level

Optimized magnetic circuit and core stacking design ensures low noise during operation, suitable for residential areas, factories and other cases.

· High reliability and long service life

Fully sealed structure (S11M) effectively prevents oil leakage and moisture, slows 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 circuits and overloads.

Equipped with a gas relay, thermometer, pressure relief device, and other protective measures.

Product benefits

1. Reasonable design: using modern computational technology to analyze the electrical, magnetic, mechanical, and thermal characteristics of transformers, and based on this, designing construction drawings to make the product structure more reasonable and complete.

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

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

4. Preferred Components: Select high-quality domestic or imported components according to user requirements, further enhancing product operational reliability.

Application Scenarios

· Urban and Rural Power Grids

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

· Industrial and Mining Enterprises

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

· Commercial and Public Buildings

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

· Infrastructure Projects

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

· New Energy Supporting 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 has a registered capital of 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 demonstration enterprise of technological innovation in Shandong Province, an outstanding private technology enterprise in Shandong Province, a model base for employment of disabled persons, a contract-abiding and trustworthy enterprise in Shandong Province, a municipal enterprise technology center of Liaocheng, an outstanding industrial enterprise of Dongchangfu District, a demonstration enterprise in science and technology 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 facilities, and standardized 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 voltages up to 220 kV, as well as additional distribution equipment systems. With qualifications in general energy contracting and a specialized technical construction team, Xinda is among the leading manufacturers of power transformers in China, excelling in research and development, production, and integrated engineering services.