Three Phase 250kVA 35kV Oil Immersed Transformer

Product Highlights

• Wide Applicability: Suitable for outdoor applications, including residential, commercial, and industrial settings.
• Advanced Core Design: High-quality grain-oriented silicon steel cores with a stepped lap design to form a low-loss magnetic circuit, ensuring minimal no-load losses and low operating noise.
• High-Quality Winding Technology: Advanced coil geometry with high-grade copper conductors provides enhanced short-circuit strength, uniform current distribution, and reduced eddy current losses.
• Fancy Appearance and Reliable Operation: Attractive design with easy and reliable operation.
• Corrugated Tank Sealing Structure: Prevents contact with air and water, reducing oil aging and extending the transformer's service life.
• Comprehensive Safety Features: Equipped with a pressure relief valve, oil level indicator, and temperature monitoring system.
• Customizable Voltage Ratings: Available in various voltage ratings to meet specific application requirements.

Product Features

• Advanced Core Design: High-quality grain-oriented silicon steel cores with a stepped lap design to minimize core losses and reduce noise levels.
• High-Quality Winding Technology: Advanced coil geometry with high-grade copper conductors ensures enhanced short-circuit strength, uniform current distribution, and reduced eddy current losses.
• Corrugated Tank Sealing Structure: Prevents air and water ingress, reducing oil aging and extending service life.
• Comprehensive Safety Features: Equipped with a pressure relief valve, oil level indicator, temperature monitoring system, and moisture absorbers.
• High-Efficiency Cooling: Uses ONAN (Oil Natural Air Natural) cooling method with an efficient heat sink design and optimized oil flow channels to ensure enhanced heat dissipation.
• Low Noise and Low Loss: Advanced design minimizes operational noise and energy losses.
• Temperature Control: Oil temperature rise ≤55K and winding temperature rise ≤60K, in compliance with IEC insulation level standards.
• Impedance Voltage: 4.5% impedance voltage ensures stable voltage regulation.
• Frequency Operation: Supports 50/60Hz frequency operation.
• Vector Group: Dyn11 vector group for optimal performance.

Technical Specifications

• Model Number: S11-250/35/0.4
• Rated Voltage (HV Side): 35kV
• Rated Voltage (LV Side): 0.4kV
• Rated Power: 250kVA
• Connection Symbol/Vector Group: Dyn11
• Tapping Range: ±5% or ±2*2.5%
• Winding Material: Copper
• Cooling Method: ONAN (Oil Natural Air Natural)
• Number of Phases: Three
• Rated Frequency: 50Hz or 60Hz
• Impedance Voltage: 4.5%
• Oil Temperature Rise: ≤55K
• Winding Temperature Rise: ≤60K
• Brand: Aputon

Insulation System

• Advanced Oil Immersion Technology: High-quality transformer oil provides superior cooling and insulation properties.
• Corrugated Tank Design: Enhances cooling efficiency and structural strength.
• Sealed Construction: Prevents moisture ingress and extends service life.

Safety Features

• Buchholz Relays: Detect gas accumulation in the transformer, providing early warning of potential issues.
• Oil Level Indicators: Monitor oil levels to ensure proper operation.
• Temperature Indicators: Continuous temperature monitoring to prevent overheating.
• Pressure Relief Devices: Safely release pressure in case of failure.
• Moisture Absorbers: Prevent moisture intrusion.
• Optional Lightning Arresters: Additional protection against lightning strikes.

Applications

• Distribution Networks: Ideal for providing reliable power distribution in residential and commercial areas.
• Industrial Facilities: Supports stable power for production lines, machinery, and other industrial applications.
• Commercial Buildings: Suitable for malls, office buildings, hotels, and other commercial complexes.
• Rural Electrification: Ideal for remote and rural electrification projects.
• Mining Operations: Supports power needs in mining operations.
• Infrastructure Projects: Perfect for infrastructure projects requiring medium-to-low voltage transformation.
• Renewable Energy Facilities: Suitable for renewable energy installations.

Installation and Maintenance

• Simple Installation Requirements: Minimal maintenance needs.
• Regular Oil Testing and Monitoring: Recommended for optimal performance.
• Professional Technical Support: Available for installation and maintenance.
• Easily Accessible Design Features: Clear checkpoints and simplified maintenance procedures.
• Regular Inspection Guidelines: Provided to ensure smooth operation.
• Clear Operating Manuals: Detailed instructions for operation and maintenance.
• Spare Parts Availability: Ensures reliable long-term operation.

Quality Assurance

• Manufactured According to International Standards: Comprehensive testing at each production stage.
• Rigorous Quality Control: Each unit undergoes rigorous quality control and testing before delivery.
• Full Technical Documentation and Support: Provided for all units, including type test certificates, routine test reports, and maintenance guides.
• Optional Features: Special paint finishes, custom accessories, additional protective devices, specific mounting arrangements, special environmental suitability, and enhanced monitoring systems to meet unique installation requirements.

Environmental Considerations

• Energy-Saving Design: Minimizes energy losses and maximizes operational efficiency.
• Low Noise Emissions: Advanced design minimizes operational noise.
• Minimal Environmental Impact: Recyclable materials and an anti-leakage oil system make it an environmentally friendly choice.
• Fire Protection Design: Includes explosion-proof functions and safety interlocks.
• Environmental Certifications: Meets environmental certifications and safety standards.

Contact us for detailed specification

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