Efficient three-phase oil-immersed transformer

I. Product Introduction

Transformers are classic high-efficiency distribution transformers with energy saving, mainly covering oil-immersed types and their corresponding dry-type derivatives, widely used in 10 kV and 35 kV power distribution systems. As the main equipment for power transmission and conversion, connecting high-voltage power grids and terminal power consumption.

II. Specifications and Parameters (Customizable)

(i) General Basic Parameters

· Voltage level: 10 kV/0.4 kV (common flow), 35 kV/10.5 kV (optional for oil immersion), fully compatible with national power distribution grid standards, ensuring smooth grid connection;

· Connection group marking: Dyn11, YD11 (standard), customizable according to actual power grid needs to ensure stability and reliability of power transmission;

· Short-circuit impedance: 6%, 7% (standard), optimized winding design to enhance short-circuit resistance, effectively withstand sudden short circuits and reduce the probability of equipment failure;

· Insulation level: Oil-immersed uses Class A thermal insulation, dry-type uses Class F epoxy resin, with excellent performance, ensuring long-term stable operation under rated conditions;

(II) Specific parameters

· Rated power: 100kVA-20000kVA, covering small, medium, and large power ranges, 100kVA-500kVA for residential and small commercial projects, 630kVA-20000kVA for industrial and power scenarios;

· Cooling method: AN (self-cooling with oil immersion), ON (forced oil circulation cooling) (optional for large capacity variants), heat dissipation design with corrugated oil tank or flat tank, good heat dissipation effect, low temperature rise, suitable for long-term outdoor operation;

· Voltage regulation method: off-load voltage regulation (standard), on-load voltage regulation (optional), voltage regulation range ±2×2.5%, which can adjust the output voltage according to grid voltage fluctuations to ensure stable power quality;

· Loss parameters: no-load losses are 20%-30% lower than the S11 series, load losses are 15%-25% lower, long-term operation can significantly save electricity costs, and the investment payback period is about 3-5 years;

· Protection level: IP54 (outdoor standard version), the oil tank surface is treated with phosphate and anti-corrosion coating, which has good moisture resistance, anti-corrosion and salt water resistance, adapting to harsh outdoor conditions;

· Core materials: high-quality cold-rolled silicon steel sheet (thickness 0.30–0.35 mm), oxygen-free copper winding, which improves magnetic and electrical conductivity, reduces iron and copper losses, and enhances equipment efficiency.

(III) Specific parameters

· Rated power: 10KVA-5000KVA, mainly used for indoor power distribution in places such as residential areas, office buildings, and small industrial workshops;

· Cooling method: AN (self-cooling), AF (forced air cooling) (optional), the winding is designed with heat dissipation channels, improving heat dissipation efficiency and can adapt to short-term overload;

· Voltage regulation method: no-load voltage regulation, voltage regulation range ±2×2.5%, simple operation, stable voltage regulation, ensuring stable terminal power supply;

· Loss parameters: No-load loss is 15%-20% lower than the SCB11 series, meeting the Class 2 energy efficiency standard, and some high-end models can achieve Class 1 energy efficiency with significant energy savings;

· Noise level: ≤58 dB, oil-free operation, no mechanical vibration, suitable for sensitive environments such as hospitals, schools, and office buildings;

· Protection level: IP20-IP54 (customizable), vacuum epoxy resin casting, moisture-proof, dust-proof, anti-corrosion, low partial discharge, and safe and reliable operation;

· Core materials: cold-rolled silicon steel core with high permeability, full copper or copper foil winding, good thermal stability, high overload capacity, and not prone to aging.

III. Main features

Specific features are as follows:

(I) General main features

1. High energy efficiency and energy saving: The entire series uses high-quality cold-rolled silicon steel and full copper winding, with an optimized magnetic circuit design, significantly reducing iron and copper losses. Compared with the S11 series, no-load losses are reduced by 20%-30%, and load losses are reduced by 15%-25%.

2. Stable and reliable operation: The winding has a reasonable design with high mechanical strength, and the core clamp is rigid, effectively withstanding sudden short circuits and preventing equipment damage; The insulation material is of high quality, with good insulation, low partial discharge, no magnetic leakage or overheating, ensuring long-term stable operation, and the failure rate is lower than that of traditional transformers.

3. Low noise and environmental protection: Through optimized magnetic circuit design, damping treatment, and selection of high-quality materials, the equipment noise level is effectively reduced: oil-immersed type ≤65 dB, dry type ≤58 dB, meeting the environmental protection requirements of residential areas, commercial zones, and other scenarios.

4. Simple maintenance and durability: The entire series adopts a maintenance-free or minimal maintenance design. The S13 oil-immersed transformer features a fully sealed structure, eliminating the oil conservator, preventing oil leakage, reducing the frequency of oil inspection and replacement, and lowering operational and maintenance costs.

5. Good compatibility and flexible installation: The voltage level, capacity, and connection group markings of the S13 series can be customized according to the actual needs of the power grid and users, ensuring good compatibility with the existing power distribution system; the oil-type transformer has a compact structure, light weight, easy transportation and installation, and is suitable for outdoor installation.

IV. Application Scenarios

1. Residential areas: commercial residential areas, villas, etc., installed indoors for power distribution, oil-free, no explosion risk, low noise, no impact on residents' lives, ensuring stable power supply for household appliances, elevators, lighting, and other equipment.

2. Urban buildings: high-rise buildings, office buildings, hotels, shopping malls, and other indoor spaces, with a compact design, saving space, no need for a special oil well, adapting to the indoor power distribution layout, ensuring stable operation of office equipment, air conditioners, lighting, and other systems.

3. Sensitive locations: hospitals, schools, libraries, theaters, and other densely populated places with high safety and environmental protection requirements, free from oil pollution, noise interference, safe and reliable operation, ensuring the normal functioning of medical equipment, teaching equipment, and other sensitive equipment.

4. Small and medium-sized industrial workshops: small and medium-sized factories, workshops, etc. with low power demand, indoor installations, moisture-proof and dust-proof, adapting to the indoor production environment, ensuring stable power supply for production equipment.

5. Restoration of old urban areas: old city districts, city centers, and other space-limited zones, replacing traditional oil-immersed transformers, compact design, easy installation, enabling nearby power distribution, reducing power supply radius, and improving power supply quality.

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 for technological innovation in Shandong Province, an outstanding private technology enterprise in Shandong Province, a model base for the employment of disabled persons, a contract-abiding and trustworthy enterprise in Shandong Province, a municipal enterprise technology center in Liaocheng, an outstanding industrial enterprise in Dongchangfu District, a science and technology demonstration enterprise in Dongchangfu, and a key enterprise in 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 up to 220 kV, as well as additional distribution equipment systems. With qualifications in general power engineering 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.