315kVA Oil-Immersed Transformer

Henan GNEE Electric Co., Ltd. is one of the leading manufacturers and suppliers of 315kva oil-immersed transformer in China, also supports customized service with low price. Welcome to buy discount 315kva oil-immersed transformer for sale here from our factory. If you have any enquiry about pricelist, please feel free to email us.

The 315kVA Oil Immersed Transformers are essential devices that convert electrical energy from one voltage level to another, enabling the efficient transmission and distribution of power across various systems.

Oil-immersed transformers, in particular, have become industry favorites due to their superior cooling and insulation capabilities, which extend their lifespan and reduce maintenance requirements.

The integration of renewable energy sources, such as wind and solar, requires transformers that can handle the variable output of these sources.

Key Features of 315kVA Oil-Immersed Transformer

• Superior Heat Dissipation: Adopts high-quality insulating oil and optimized core structure, ensuring efficient heat transfer to maintain stable operating temperature and extend service life.
• Low Noise & Environmental Protection: Complies with international noise standards, suitable for industrial, commercial, and residential areas without causing environmental pollution.
• Strong Overload Capacity: Designed with high-grade copper windings and premium core materials, enabling stable operation under short-term overload conditions.
• Easy Maintenance: Compact and reasonable structure, facilitating on-site installation, daily inspection, and maintenance, reducing operational costs.

Customization Optional of 315kVA Oil Immersed Transformer

GNEE ELECTRIC's three-phase oil-immersed transformers can be fully customized to meet your specific requirements. The optional specifications of the 315kVA three-phase oil-immersed transformer can adapt to different application scenarios and customer needs.

In terms of voltage, the high-voltage side can be selected from common voltage levels such as 6kV, 10kV, and 35kV, and the low-voltage side is generally 0.4kV; other voltage values can also be customized on demand.

There are two types of tap changers: on-load voltage regulation and off-excitation voltage regulation. On-load voltage regulation can adjust the voltage when the transformer is running to ensure voltage stability, which is suitable for places with high voltage quality requirements; off-excitation voltage regulation has a low cost and is suitable for environments with small voltage fluctuations.

In terms of cooling methods, in addition to the basic oil-immersed self-cooling (ONAN), oil-immersed air cooling (ONAF) can also be selected. When the transformer load is heavy or the ambient temperature is high, ONAF can accelerate heat dissipation through the fan to enhance the cooling effect.

The protection level is optional, such as IP20 and IP23. IP20 can prevent the entry of larger solid foreign objects and is suitable for indoor clean environments; IP23 can also prevent water splashing on this basis and can be used outdoors or in humid environments.

In addition, an intelligent monitoring system can be equipped according to demand to monitor the temperature, humidity, load, winding temperature, and other parameters of the transformer in real time, and realize remote monitoring and fault warning. The insulation heat resistance level can also be customized, such as F level, H level, etc., to adapt to different operating temperatures and working conditions. There are also multiple options for grounding methods. The appropriate grounding scheme can be determined according to the power grid and installation environment to ensure safe operation.

Design Tests

All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Leak Test
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)

Transformer Factory Acceptance Test

The Transformer Factory Acceptance Test (FAT) for 315kVA three-phase oil-immersed transformers is an essential procedure conducted before shipment to ensure the transformer meets all required standards and performs optimally. During the FAT, several critical tests are carried out:

1. Appearance inspection: Check the transformer's casing, terminals, markings, oil level, etc. to ensure that there is no physical damage or defects.
2. Oil immersion inspection: Confirm that the transformer's oil immersion process meets the requirements, the oil quality is qualified, the oil level is normal and there are no impurities.
3. Electrical performance test:
4. No-load test: Measure the transformer's no-load current, no-load loss, etc., to confirm that its performance at no-load meets the standard.
5. Load test: Test the transformer's voltage, current, power loss, etc., under different loads to ensure that the transformer operates stably under the working load.
6. Short-circuit impedance test: Measure the transformer's short-circuit impedance to confirm that it meets the design specifications.

Applications of 315kVA Oil-Immersed Transformer

• Industrial Sector: Ideal for power supply in factories, workshops, and production lines, ensuring stable operation of industrial electrical equipment.
• Power Grid Construction: Widely used in distribution networks for voltage transformation, connecting high-voltage and low-voltage power systems efficiently.
• Commercial & Residential Areas: Suitable for shopping malls, hotels, office buildings, and residential communities, providing reliable power for daily use.
• Special Scenarios: Customizable for mining, railways, renewable energy (solar/wind) power generation, and other harsh or specific power supply environments.

Production & Quality Control of 315kVA Oil-Immersed Transformer

• Raw Material Inspection: Strictly test silicon steel sheets, copper windings, insulating oil, and other raw materials to ensure compliance with international standards.
• Advanced Manufacturing: Adopt automatic winding, precision shearing, and vacuum drying technology to improve product consistency and reliability.
• Comprehensive Testing: Each 315kVA Oil-Immersed Transformer undergoes no-load test, load test, insulation test, and short-circuit test before leaving the factory.
• Full-Process Supervision: Implement strict quality management throughout R&D, production, testing, and packaging to deliver high-quality products.

Product Packaging

Conclusion

The 315kVA Oil-Immersed Transformer from GNEE is a high-performance, reliable power transformation solution that integrates energy efficiency, durability, and customization. Backed by our professional production strength, strict quality control, and global after-sales service, we are your trusted partner for power transformers.

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