Efficient Three Phase Oil Immersed Transformer

I. Product Introduction

The S13 series transformers are a classic high-efficiency energy-saving distribution transformer, mainly covering the oil-immersed type (S13) and its matching dry-type derivative (SCB13), which is widely used in 10kV and 35kV power distribution network systems. As a core power transmission and transformation equipment connecting high-voltage power grids and terminal power consumption, the S13 series is designed based on the optimization of traditional transformer technology, with the core positioning of "energy saving, reliability, durability and cost-effectiveness". It strictly complies with national standards such as GB1094 series and GB20052-2020 "Minimum Allowable Values of Energy Efficiency and Energy Efficiency Levels for Power Transformers", and is one of the mainstream products for power grid energy-saving renovation and industrial and commercial power distribution.

Compared with the previous generation of S11 series transformers, the S13 series has achieved a significant leap in energy efficiency and reliability, while maintaining excellent cost performance, making it the preferred choice for most power distribution scenarios. Among them, the oil-immersed S13 transformer is mainly used in outdoor and large-scale power distribution scenarios, with mature fully sealed technology to ensure stable operation in complex environments; the dry-type SCB13 transformer adopts epoxy resin casting technology, which is oil-free and explosion-proof, suitable for indoor and sensitive scenarios. The two types complement each other, covering a variety of power distribution needs, and are widely used in power, industry, commerce, residential areas and other fields, providing stable and efficient power support for social and economic development.

II. Specifications and Parameters(Customizable)

The specifications and parameters of the S13 series transformers cover two main types: oil-immersed (S13) and dry-type (SCB13). The core parameters are designed to meet the actual power demand of different scenarios, and can be customized and adjusted according to user needs to ensure stable and efficient operation. The specific parameters are as follows:

(I) General Basic Parameters

· Voltage Level: 10kV/0.4kV (mainstream), 35kV/10.5kV (optional for oil-immersed type), fully compatible with national power distribution network standard voltage levels, ensuring smooth connection with the power grid;

· Frequency: 50Hz, adapting to the domestic power frequency power system, with stable operation performance and strong anti-interference ability;

· Connection Group Label: Dyn11, YD11 (conventional), which can be customized according to the actual needs of the power grid to ensure the consistency and stability of power transmission;

· Short-Circuit Impedance: 6%, 7% (conventional), the winding structure is optimized to enhance short-circuit resistance, effectively resisting the impact of sudden short-circuit and reducing equipment failure rate;

· Energy Efficiency Level: Grade 2 energy efficiency (mainstream), some models can reach grade 1 energy efficiency, which is significantly better than the national standard limit value, and the energy-saving effect is obvious compared with the traditional S11 series;

· Insulation Level: Oil-immersed type adopts Grade A insulation oil, dry-type adopts Grade F epoxy resin insulation, with excellent insulation performance, which can ensure long-term stable operation under rated working conditions;

· Service Life: ≥25 years, high-quality material selection and mature process design ensure the long service cycle of the equipment, reducing the cost of equipment replacement and maintenance.

(II) Specific Parameters of Oil-Immersed S13

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

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

· Voltage Regulation Method: No-load voltage regulation (conventional), on-load voltage regulation (optional), voltage regulation range ±2×2.5%, which can adjust the output voltage according to the grid voltage fluctuation to ensure stable power supply quality;

· Loss Parameters: No-load loss is 20%-30% lower than that of the S11 series, load loss is 15%-25% lower, long-term operation can save a lot of electricity costs, and the investment payback period is about 3-5 years;

· Noise Level: ≤65dB, optimized through magnetic circuit design and shock absorption treatment, the noise meets the national standard requirements, reducing environmental interference in residential and commercial areas;

· Protection Level: IP54 (outdoor conventional), the oil tank surface is treated with phosphating and anti-corrosion coating, which has good moisture-proof, anti-rust and salt-spray proof performance, adapting to harsh outdoor environments;

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

(III) Specific Parameters of Dry-Type SCB13

· Rated Capacity: 30kVA-1600kVA, mainly used for indoor small and medium-sized power distribution scenarios, such as residential districts, office buildings, and small industrial workshops;

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

· Voltage Regulation Method: No-load voltage regulation, voltage regulation range ±2×2.5%, simple operation, stable voltage regulation, ensuring the stability of terminal power supply;

· Loss Parameters: No-load loss is 15%-20% lower than that of the SCB11 series, meeting the grade 2 energy efficiency standard, and some high-end models can reach grade 1 energy efficiency, with significant energy-saving effect;

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

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

· Core Materials: High-permeability cold-rolled silicon steel sheet core, full copper winding or copper foil winding, good thermal stability, strong overload capacity, and not easy to aging.

(IV) Other Optional Parameters

Optional intelligent monitoring modules, including temperature monitoring, load monitoring, and partial discharge monitoring, support remote data transmission and alarm functions, facilitating daily operation and maintenance; the protection level, voltage regulation method, and capacity specifications can be customized according to the use environment (such as high humidity, dusty, coastal areas) to meet the special needs of different scenarios. At the same time, it can be equipped with a rain cover, anti-theft device, and other accessories to improve the adaptability of the equipment.

III. Main Features

The S13 series transformers integrate the advantages of mature technology, high energy efficiency, reliability and durability, and cost-effectiveness. The oil-immersed and dry-type models have their own characteristics, and at the same time have common core advantages, which can meet the diversified power distribution needs of different scenarios. The specific features are as follows:

(I) General Core Features

1. High Energy Efficiency and Energy Saving: The whole series adopts high-quality cold-rolled silicon steel sheet and full copper winding, optimized magnetic circuit design, which greatly reduces iron loss and copper loss. Compared with the S11 series, the no-load loss is reduced by 20%-30%, and the load loss is reduced by 15%-25%. Long-term operation can save a lot of electricity costs, which is in line with the national energy-saving and emission-reduction policy and the "dual carbon" development concept.

2. Stable and Reliable Operation: The winding adopts a reasonable structure design, with high mechanical strength, and the core clamping is firm, which can effectively resist the impact of sudden short-circuit and avoid equipment damage; the insulation material is of high quality, with good insulation performance, small partial discharge, no magnetic leakage and overheating phenomenon, ensuring long-term stable operation, and the failure rate is lower than that of the traditional transformer.

3. Low Noise and Environmental Protection: Through the optimization of magnetic circuit design, shock absorption treatment and high-quality material selection, the noise of the equipment is effectively reduced, the oil-immersed type is ≤65dB, and the dry-type is ≤58dB, which meets the environmental protection requirements of residential areas, commercial areas and other scenarios; the oil-immersed type adopts environmentally friendly transformer oil, which is non-toxic and pollution-free, and the dry-type is oil-free, no leakage, no explosion risk, and the materials are recyclable, complying with environmental protection standards.

4. Easy Maintenance and Durable: The whole series adopts maintenance-free or less maintenance design. The oil-immersed S13 transformer adopts a fully sealed structure, cancels the oil conservator, avoids oil leakage, reduces the frequency of oil inspection and oil change, and reduces the operation and maintenance cost; the dry-type SCB13 transformer has no oil, basically no maintenance, only needs regular dust removal and inspection; the equipment is made of high-quality materials, with strong corrosion resistance and long service life of ≥25 years.

5. Good Compatibility and Flexible Installation: The voltage level, capacity and connection group label of the S13 series can be customized according to the actual needs of the power grid and users, which has good compatibility with the existing power distribution system; the oil-immersed type is compact in structure, light in weight, easy to transport and install, suitable for outdoor installation; the dry-type is small in volume, no need for a special oil pit, and can be installed in indoor power distribution rooms and basements, adapting to various power distribution layouts.

(II) Exclusive Features of Oil-Immersed S13

1. Fully Sealed and Leakage-Free: The oil tank and seals adopt high-quality rubber seals and one-time forming technology, which has passed strict positive and negative pressure leak tests to ensure no oil leakage, avoid insulation oil deterioration and insulation moisture aging, and adapt to long-term outdoor operation in different climates.

2. Strong Environmental Adaptability: The oil tank surface is treated with phosphating and anti-corrosion coating, which has good moisture-proof, anti-rust, anti-mildew and salt-spray proof performance. It can operate stably in harsh environments such as -20℃～+45℃, high humidity, dusty, coastal and petrochemical areas, and is suitable for complex industrial and outdoor power distribution scenarios.

3. Mature Technology and High Cost-Effectiveness: The oil-immersed S13 transformer adopts mature production technology, stable product quality, and the cost is lower than that of the new generation S18 series. It has excellent cost-effectiveness, which is suitable for large-scale promotion and application in power grid renovation and industrial power distribution.

(III) Exclusive Features of Dry-Type SCB13

1. Fire and Explosion Proof, Safe and Secure: Epoxy resin vacuum casting winding, no oil, no ignition point, eliminating the risk of fire and explosion, can be installed in indoor, basement, load center and other densely populated or sensitive areas, such as hospitals, schools, office buildings and residential districts, ensuring the safety of people and property.

2. Compact Structure and Space Saving: Under the same capacity, the volume is 25%-35% smaller than that of the oil-immersed type, light in weight, no need for a special oil pit, and can be directly installed in the floor power distribution room and basement, which is suitable for space-constrained scenarios such as high-rise buildings and old urban area renovation.

3. Moisture-Proof and Dust-Proof, Suitable for Indoor Use: The epoxy resin casting winding has good moisture-proof and dust-proof performance, can operate stably in high-humidity indoor environments, and is not easy to be affected by dust and moisture, ensuring the reliability of power supply for indoor equipment.

IV. Application Scenarios

The S13 series transformers, with their advantages of high energy efficiency, reliability, durability and cost-effectiveness, cover a variety of application scenarios, including outdoor, indoor, industrial, commercial, residential and other fields. The oil-immersed and dry-type models are reasonably divided according to the scenario characteristics to meet the different power distribution needs of users. The specific application scenarios are as follows:

(I) Application Scenarios of Oil-Immersed S13

1. Power Grid System: 10kV/35kV outdoor power distribution stations, urban and rural power grid renovation projects, as the core equipment of the power distribution network, connecting high-voltage power grids and terminal users, which can replace the traditional S11 series transformers to reduce power grid loss and improve power supply stability.

2. Industrial Scenarios: Medium and large-scale industrial enterprises, such as metallurgy, mining, chemical industry, building materials, and textile factories, adapting to high load, complex environment and long-term operation needs, providing stable high-voltage power supply for production equipment, ensuring the normal operation of the production line.

3. Outdoor Public Facilities: Highways, railways, airports, ports, scenic spots and other outdoor public facilities, providing stable power supply for lighting, monitoring, ventilation and other equipment, adapting to outdoor harsh environment and long-term operation requirements.

4. Large-Scale Commercial and Industrial Parks: Industrial parks, economic development zones, large commercial complexes (outdoor power distribution areas), providing centralized power distribution for multiple enterprises and merchants, adapting to large capacity and long-cycle operation needs, reducing the operation and maintenance cost of the park.

(II) Application Scenarios of Dry-Type SCB13

1. Residential Areas: Commercial residential districts, villas, etc., installed in indoor power distribution rooms, no oil, no explosion risk, low noise, no impact on residents' lives, providing 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 scenarios, with compact structure, space saving, no need for a special oil pit, adapting to the indoor power distribution layout, ensuring the stable operation of office equipment, air conditioning, lighting and other systems.

3. Sensitive Places: Hospitals, schools, libraries, theaters and other densely populated places with high safety and environmental protection requirements, no oil pollution, no noise interference, safe and reliable operation, ensuring the normal operation of medical equipment, teaching equipment and other sensitive equipment.

4. Small and Medium-Sized Industrial Workshops: Small and medium-sized factories, workshops, etc., with small capacity demand, indoor installation, moisture-proof and dust-proof, adapting to the indoor production environment, providing stable power supply for production equipment.

5. Old Urban Area Renovation: Old urban areas, urban centers and other space-constrained areas, replacing the traditional oil-immersed transformers, compact structure, easy installation, realizing nearby power distribution, shortening the power supply radius and improving power supply quality.

(III) General Adaptation Scenarios

In addition to the above exclusive scenarios, the S13 series transformers can also be widely used in rural power grid upgrading, temporary power supply (such as construction site temporary power distribution), new energy supporting facilities (such as small photovoltaic and wind power supporting power distribution), and other scenarios. With its good compatibility and flexible customization ability, it can adapt to the power distribution needs of different regions, different environments and different loads, providing stable, efficient and energy-saving power distribution services for all walks of life, and promoting the healthy development of the power industry.

About Us 

Xinda Transformer Co., Ltd. is located at No. 38, Jinsan Road, Fenghuang Industrial Park, Dongchangfu District, Liaocheng City, Shandong Province, China. The company has a registered capital of RMB 150 million and covers an area of approximately 186,667 square meters (280 mu). It is recognized as a National High-Tech Enterprise, a Shandong Province Technology Innovation Demonstration Enterprise, an Excellent Private Technology Enterprise of Shandong Province, a Shandong Model Base for Employment of the Disabled, a Shandong Province Contract-Honoring and Trustworthy Enterprise, a Liaocheng Municipal Enterprise Technology Center, an Excellent Industrial Enterprise of Dongchangfu District, a Science and Technology Innovation Demonstration Enterprise of Dongchangfu District, and a Key Backbone Enterprise of Dongchangfu District.

The annual production capacity is 9,000 MVA. The total construction area of office buildings, R&D facilities, and standardized workshops is 53,000 square meters. Equipped with over 470 sets of advanced production equipment, the company possesses a manufacturing capacity of 10,000 MVA for transformers up to 220 kV, along with complementary switchgear systems. With qualifications in Power Engineering General Contracting and a dedicated technical construction team, Xinda ranks among the leading power transformer manufacturers in China, excelling in R&D, manufacturing, and integrated engineering services.