zishengelectric
Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
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Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
The Zisheng 31500kVA 35kV Oil-Immersed Copper Transformer is a high-performance three-phase power transformer specially designed for medium and high-voltage substations, industrial power distribution systems, renewable energy projects, and utility grid applications. With a rated capacity of 31.5MVA and a voltage class of 35kV, this transformer provides efficient and stable voltage conversion for large-scale power transmission and distribution networks.
Designed according to international transformer manufacturing standards, this oil-immersed transformer combines advanced structural design, high-quality copper windings, premium electrical insulation materials, and strict manufacturing processes to achieve excellent electrical performance, low energy consumption, strong overload capability, and long service life.
The transformer is suitable for continuous operation in various environmental conditions, including high-temperature, high-humidity, dusty, and outdoor installation environments. It provides reliable power support for substations, industrial facilities, mining operations, renewable energy plants, and infrastructure projects.
The transformer adopts high-quality copper conductors for both high-voltage and low-voltage windings. Compared with aluminum winding designs, copper windings provide lower electrical resistance, better conductivity, improved heat dissipation performance, and reduced power losses.
The optimized winding structure enhances the transformer's ability to withstand sudden short circuits and mechanical stress during operation. The compact winding arrangement improves electromagnetic balance and ensures stable operation under heavy load conditions.
The transformer uses high-quality insulating oil as the cooling and insulation medium. The oil circulation system effectively transfers heat generated during operation from the core and windings to the radiator, maintaining a safe operating temperature.
The oil-immersed structure provides excellent cooling efficiency and allows the transformer to operate continuously with high reliability. The cooling system can be customized according to capacity requirements and project conditions, including natural air cooling (ONAN) or forced air cooling (ONAF).
The transformer core is manufactured using premium cold-rolled grain-oriented silicon steel sheets with advanced processing technology. The core joints are carefully designed to reduce magnetic flux leakage, minimize no-load losses, and improve overall energy efficiency.
The optimized core design helps reduce operating costs by lowering energy consumption while maintaining stable magnetic performance throughout the transformer's service life.
The transformer adopts a multi-layer insulation system to ensure reliable electrical insulation between windings, between phases, and between windings and ground.
High-quality insulation materials with excellent heat resistance and aging resistance are selected to maintain insulation performance during long-term operation. The transformer is designed to withstand voltage fluctuations, overload conditions, and harsh working environments.
The transformer structure is reinforced through advanced manufacturing technology, ensuring strong mechanical strength and resistance against short-circuit forces.
The winding clamping system is precisely designed and assembled to maintain stable positioning during transportation, installation, and operation. This improves operational safety and reduces the risk of internal deformation caused by electrical faults.
The transformer tank is manufactured from high-strength steel plates with professional welding technology to ensure mechanical strength and sealing performance.
The sealed tank structure effectively prevents moisture, dust, and external environmental factors from affecting internal components. The surface treatment process provides excellent corrosion resistance, making the transformer suitable for outdoor substations and challenging environments.
Optional protection accessories can be provided according to project requirements, including:
The Zisheng 31500kVA transformer adopts an energy-efficient design to reduce both no-load losses and load losses. By using advanced core materials, optimized electromagnetic design, and high-conductivity copper windings, the transformer helps customers reduce electricity consumption and improve overall system efficiency.
The low-loss design is especially suitable for long-term operation in power grids, renewable energy projects, and industrial applications where energy efficiency and operating costs are critical considerations.
This 35kV oil-immersed copper transformer is widely used in:
Zisheng provides customized transformer solutions according to different project requirements. The engineering team can adjust the transformer design based on installation environment, grid parameters, load requirements, and regional standards.
Available customization options include:
Every Zisheng transformer undergoes strict quality inspection throughout the production process, including raw material inspection, core manufacturing, winding processing, assembly, oil treatment, and final testing.
Before shipment, each transformer is tested to verify:
Through strict quality control and professional manufacturing experience, Zisheng ensures that each 31500kVA 35kV Oil-Immersed Copper Transformer delivers reliable performance, long service life, and stable operation for global power projects.
| Item | Technical Parameter |
|---|---|
| Product Type | Oil-Immersed Power Transformer |
| Rated Capacity | 31500kVA (31.5MVA) |
| Phase | Three Phase |
| Frequency | 50Hz / 60Hz |
| Rated High Voltage | 35kV |
| Rated Low Voltage | Customized According to Project Requirements |
| Voltage Ratio | Customized |
| Winding Material | Copper |
| Cooling Method | ONAN / ONAF |
| Insulation Medium | Transformer Oil |
| Tap Changer Type | Off-Circuit Tap Changer / On-Load Tap Changer (Optional) |
| Vector Group | Customized (Common Options: Dyn11, Yyn0, etc.) |
| Installation Type | Outdoor / Indoor Substation |
| Insulation Level | According to IEC Standards |
| Applicable Standard | IEC 60076 / Customer Required Standards |
| Item | Specification |
| Rated Power | 31500kVA |
| High Voltage Side | 35kV |
| Low Voltage Side | According to Customer Requirements |
| No-Load Loss | Customized According to Energy Efficiency Requirements |
| Load Loss | Customized According to Design Requirements |
| Short-Circuit Impedance | Customized |
| Temperature Rise | Designed According to Applicable Standards |
| Frequency Withstand Capability | 50Hz / 60Hz |
| Efficiency | High Efficiency Design |
| Item | Description |
| Core Material | High-quality Grain-Oriented Silicon Steel |
| Core Structure | Three-Leg Laminated Core Design |
| Winding Structure | Copper Foil / Copper Wire Winding Design |
| Tank Type | Sealed Oil Tank or Conservator Type |
| Cooling System | Natural Oil Circulation and Air Cooling |
| Insulation System | High-Performance Oil-Paper Insulation |
| Terminal Arrangement | Customized According to Installation Requirements |
| Protection Accessories | Optional Monitoring and Protection Devices |
| Item | Specification |
| Operating Environment | Suitable for Outdoor Substation Applications |
| Ambient Temperature | Customized According to Installation Location |
| Altitude | Customized According to Project Requirements |
| Humidity Resistance | Suitable for High Temperature and High Humidity Areas |
| Corrosion Resistance | Enhanced Surface Protection Available |
| Application Environment | Industrial, Utility, Renewable Energy, Mining and Infrastructure Projects |
Each transformer undergoes comprehensive factory testing, including:
Zisheng provides customized 31500kVA 35kV oil-immersed copper transformer solutions according to different project specifications, including:
Note: Technical parameters can be adjusted according to customer drawings, grid requirements, and international standards.
Zisheng provides customized transformer solutions according to different project requirements, grid conditions, installation environments, and customer technical specifications. The 31500kVA 35kV Oil-Immersed Copper Transformer can be specially designed and configured to meet various application needs while ensuring reliable performance, high efficiency, and long service life.
The transformer voltage ratio can be customized according to the customer's power system requirements, including:
Available for different power grid standards:
The transformer design can be optimized according to the operating frequency of the destination country or project location.
According to project requirements, customers can select:
Different vector group configurations are available, including:
The vector group can be selected based on system protection coordination and power distribution requirements.
Different cooling methods can be provided according to capacity and operating conditions:
The transformer can be customized for improved energy-saving performance, including:
These options help reduce operating costs and support energy-saving requirements.
For different installation environments, Zisheng can provide customized solutions for:
Optional protection and monitoring devices include:
Available customized designs include:
Zisheng can manufacture transformers according to different international standards and customer requirements, including:
With flexible customization capability and professional transformer manufacturing experience, Zisheng delivers reliable 31500kVA 35kV oil-immersed copper transformer solutions for substations, power grids, renewable energy projects, and industrial applications worldwide.
Zisheng applies professional packing and transportation solutions to ensure the 31500kVA 35kV Oil-Immersed Copper Transformer arrives at the project site safely and in excellent condition. Considering the large size, heavy weight, and special transportation requirements of high-capacity transformers, every stage from factory packaging to final delivery is carefully managed.
Before shipment, each transformer undergoes a complete inspection and preparation process. The transformer body, accessories, and spare parts are properly protected to prevent damage during handling and transportation.
The standard packing process includes:
The main transformer unit is normally transported as a complete assembled unit or partially dismantled according to transportation conditions and project requirements.
Packing measures include:
For long-distance transportation, special protective measures can be provided according to the destination environment and transportation method.
Transformer accessories are packed separately with proper identification to ensure convenient installation at the project site.
Accessories may include:
Each package is clearly marked with product information, installation position, and handling instructions.
Zisheng provides flexible transportation solutions according to customer location, project schedule, and delivery requirements.
Available transportation methods include:
Suitable for international export projects. The transformer is professionally secured for containerized or break-bulk shipping to ensure safe ocean transportation.
Suitable for domestic delivery and inland transportation. Special heavy-duty vehicles and lifting equipment can be arranged according to transformer dimensions and weight.
Available for suitable regions requiring long-distance inland transportation solutions.
For international customers, Zisheng provides complete export support, including:
The transformer can be delivered to global markets including Africa, South America, Southeast Asia, Central Asia, the Middle East, and other regions.
Due to the large capacity and heavy structure of a 31500kVA transformer, professional handling procedures are followed during loading and unloading.
Recommended handling practices include:
Before shipment, Zisheng performs a final inspection to confirm:
Through professional packaging, strict quality control, and reliable logistics coordination, Zisheng ensures that every 31500kVA 35kV Oil-Immersed Copper Transformer is delivered safely and ready for installation and operation.
Zisheng performs comprehensive factory testing on every 31500kVA 35kV Oil-Immersed Copper Transformer before shipment to ensure that the transformer meets design requirements, international standards, and customer project specifications. Through strict inspection procedures and advanced testing equipment, each transformer is verified for electrical performance, mechanical reliability, insulation safety, and long-term operating stability.
All tests are carried out by professional engineers in accordance with applicable transformer standards, including IEC 60076 and customer-specific technical requirements.
Routine tests are performed on every transformer unit before delivery to verify basic electrical characteristics and manufacturing quality.
The winding resistance of high-voltage and low-voltage windings is measured to:
The transformer turns ratio is tested at all tap positions to ensure:
Insulation resistance testing is conducted between:
This confirms the reliability and durability of the transformer insulation system.
The transformer is tested under no-load conditions to measure:
The test verifies that the transformer core design meets energy efficiency requirements.
Load tests are performed to verify:
The results ensure stable operation under rated load conditions.
To ensure safe operation under different voltage conditions, the transformer undergoes dielectric tests.
This test verifies the insulation strength between:
It ensures the transformer can withstand normal operating voltage and temporary overvoltage conditions.
The induced voltage test checks the insulation performance between winding turns and layers, ensuring reliable operation under abnormal voltage conditions.
For projects requiring higher reliability, partial discharge testing can be performed to evaluate insulation quality and identify potential internal defects.
Before shipment, Zisheng conducts detailed mechanical inspections, including:
These inspections ensure the transformer can withstand transportation, installation, and long-term outdoor operation.
The insulating oil is tested to ensure excellent insulation and cooling performance.
Testing items include:
High-quality transformer oil helps maintain stable operation and extends the service life of internal components.
Temperature rise testing can be performed according to project requirements to verify:
This ensures the transformer can operate safely under continuous load conditions.
The transformer design is evaluated to ensure strong resistance against short-circuit forces.
Verification includes:
This improves operational safety during power system faults.
Before shipment, Zisheng completes a final quality inspection, including:
According to customer requirements, Zisheng can provide complete testing documents, including:
Through strict manufacturer testing procedures, Zisheng ensures that every 31500kVA 35kV Oil-Immersed Copper Transformer delivered to global customers provides reliable performance, safe operation, and long-term service stability.
Zisheng conducts comprehensive routine testing on every 31500kVA 35kV Oil-Immersed Copper Transformer before delivery to verify manufacturing quality, electrical performance, insulation reliability, and compliance with customer requirements. These tests are performed using professional testing equipment by experienced engineers according to international transformer standards, including IEC 60076.
Routine testing ensures that each transformer meets the required technical specifications and provides safe, stable, and efficient operation after installation.
The winding resistance test is performed on high-voltage and low-voltage windings to verify the quality and consistency of the winding structure.
The test helps to:
Accurate winding resistance values ensure stable current distribution and reduce additional losses during operation.
The voltage ratio test is carried out to confirm the transformation ratio between high-voltage and low-voltage windings.
The test verifies:
Each tap position is checked to ensure reliable voltage regulation performance.
The insulation resistance test evaluates the condition and reliability of the transformer insulation system.
Measurements are taken between:
This test confirms that the insulation system provides sufficient protection against electrical leakage and voltage stress during operation.
The no-load test evaluates the performance of the transformer core when the secondary winding is open.
The test measures:
The results are used to verify:
This helps ensure low energy consumption during long-term operation.
The load loss and impedance test verifies transformer performance under rated operating conditions.
The test measures:
The results help confirm:
The dielectric strength test checks the insulation capability of the transformer against electrical stress.
Testing includes:
These tests verify the insulation system between:
The purpose is to ensure safe operation under normal and abnormal voltage conditions.
The insulating oil is tested to confirm its electrical insulation and cooling performance.
Testing items include:
Qualified transformer oil ensures effective heat dissipation and protects internal components from insulation deterioration.
For transformers equipped with tap changers, operation testing is performed to confirm:
This ensures stable voltage regulation during actual grid operation.
Before shipment, the transformer undergoes a complete visual and mechanical inspection.
Inspection items include:
After completing all routine tests, Zisheng provides detailed test records according to customer requirements.
The routine test report may include:
Through strict routine testing procedures, Zisheng ensures that every 31500kVA 35kV Oil-Immersed Copper Transformer achieves reliable performance, high efficiency, and long-term operational safety for substations and power distribution projects worldwide.
The Zisheng 31500kVA 35kV Oil-Immersed Copper Transformer is designed for reliable power conversion and distribution in medium and high-voltage electrical systems. With high capacity, efficient operation, and strong environmental adaptability, it is widely applied in substations, industrial facilities, renewable energy projects, and large-scale infrastructure developments.
The transformer provides stable voltage transformation between transmission and distribution networks, supporting continuous power supply for critical applications where safety, reliability, and energy efficiency are essential.
The transformer is widely used in power substations as a key component for voltage conversion and grid distribution.
Typical applications include:
It helps improve power system stability by providing efficient and reliable voltage regulation between different voltage levels.
Large industrial facilities require stable and continuous power supply for production operations. The 31500kVA transformer is suitable for:
Its high capacity and overload capability ensure reliable operation under demanding industrial load conditions.
The transformer is commonly used in renewable energy systems to connect generated electricity to medium-voltage and high-voltage grids.
Applications include:
The transformer supports efficient energy transmission while reducing power losses and improving renewable energy utilization.
Mining operations often require durable electrical equipment capable of operating in harsh environments.
The transformer is suitable for:
Its strong mechanical structure, reliable insulation system, and customized environmental protection design enable stable operation in challenging conditions.
The transformer can provide reliable power supply for large-scale infrastructure developments, including:
It ensures sufficient power capacity for continuous operation and future load expansion.
For national and regional electricity networks, the transformer supports:
Its high efficiency and long service life make it suitable for long-term utility operation.
Data centers and communication facilities require highly reliable power systems. The transformer can be applied in:
The stable output and high reliability help support uninterrupted operation of sensitive electrical equipment.
The Zisheng 31500kVA 35kV Oil-Immersed Copper Transformer is suitable for various global markets, especially regions with growing power infrastructure demands, including:
The transformer can be customized according to different grid standards, climate conditions, installation requirements, and project specifications.
With reliable performance, flexible customization options, and strict quality control, Zisheng provides professional transformer solutions for substations, power networks, industrial projects, and renewable energy applications worldwide.
The 31500kVA 35kV Oil-Immersed Copper Transformer is mainly used for voltage conversion and power distribution in substations, industrial facilities, renewable energy projects, mining operations, and utility power networks. It is designed to provide stable and efficient power transmission for medium and high-voltage systems.
Copper windings provide excellent electrical conductivity, lower resistance, better heat dissipation, and higher mechanical strength. Compared with aluminum windings, copper windings help reduce power losses, improve efficiency, enhance short-circuit resistance, and extend transformer service life.
The standard design is a 35kV high-voltage class transformer. The low-voltage side and voltage ratio can be customized according to customer project requirements, grid conditions, and technical specifications.
Yes. Zisheng provides customized transformer solutions according to customer needs, including:
The standard cooling method is ONAN (Oil Natural Air Natural). ONAF (Oil Natural Air Forced) cooling or other customized cooling solutions can also be provided according to capacity requirements and operating conditions.
The transformer can be manufactured according to international standards such as IEC 60076 and customer-specific technical requirements. Zisheng can also provide products according to regional grid standards and project specifications.
Each transformer undergoes strict factory testing before delivery, including:
Complete test reports can be provided according to customer requirements.
With proper installation, operation, and maintenance, a high-quality oil-immersed transformer can provide reliable service for several decades. The use of premium materials, advanced manufacturing technology, and strict quality control helps ensure long-term operational stability.
Yes. The transformer can be customized for challenging environments, including:
Special protection treatments and design improvements can be applied according to project conditions.
Due to its large capacity and size, the transformer is usually transported by sea, road, or railway depending on the destination and project requirements.
Zisheng provides professional packing solutions, transportation support, shipping documentation, and loading guidance to ensure safe delivery.
To provide an accurate quotation, customers are recommended to provide:
The engineering team will provide a suitable technical solution based on the project requirements.
Yes. Zisheng provides technical support throughout the project process, including:
The professional service team helps customers achieve safe and reliable transformer operation.
Zisheng combines professional transformer manufacturing experience, strict quality control, advanced production technology, and customized engineering capability to provide reliable power transformer solutions.
The transformer features:
It is a reliable choice for substations, power grids, industrial projects, and renewable energy applications worldwide.
31500kVA 35kV Oil-Immersed Copper Transformer For Substation