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Oil-immersed Transformer
Oil-immersed Transformer
Oil-immersed Transformer
Oil-immersed Transformer
oil-immersed transformer
Oil-immersed Transformer
Oil-immersed Transformer
Oil-immersed Transformer
Oil-immersed Transformer

35KV Oil-immersed Power Transformer

The 35KV oil-immersed power transformer is a cutting-edge product that has undergone significant improvements in design, materials, structure, and craftsmanship. It features a robust construction with high and low voltage clamps using steel straps for enhanced structural integrity, increased core fastening strength, and improved resistance to transportation impact. This product excels in short-circuit resistance, low power loss, minimal noise, reliable operation, and aesthetically pleasing appearance, meeting and even surpassing the advanced levels of similar products worldwide.

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    Product Detail

    General Introduction

    The 35KV Oil-Immersed Power Transformer is a critical component in medium-voltage power distribution networks, designed to step up or step down voltage levels while ensuring efficient and reliable energy transfer. Filled with high-quality insulating oil, this transformer type offers superior heat dissipation, electrical insulation, and long-term durability. Widely used in industrial plants, substations, renewable energy projects, and urban infrastructure, it provides stable power supply for various applications.

    Applications:

    • Power transmission and distribution networks
    • Industrial facilities (mining, manufacturing, etc.)
    • Renewable energy integration (wind/solar farms)
    • Urban and rural substations
    • Railway and transportation systems

    Technical Parameters

    Parameter Specification
    Rated Voltage 35kV (primary), 0.4-10kV (secondary)
    Power Rating 500kVA – 20,000kVA
    Frequency 50Hz/60Hz
    Efficiency ≥99% at rated load
    Insulation Class A (temperature rise ≤65K)
    Cooling Method ONAN (Oil Natural Air Natural)
    Noise Level ≤65dB (under full load)
    Impulse Withstand Voltage 170kV (lightning impulse)
    Oil Volume 0.5-5m³ (depending on capacity)
    Weight 1-20 tons (depending on capacity)

    额定容量 
    rated capacity KVA         		电压组合及分接范围                          Voltage combination and tap range 联结组标号Connection Group Symbol  空载损耗  No-load Loss        (W) 负载损耗 Load Loss        (W) 空载电流No-load Current   (%) 短路阻抗Short Circuit Impedance  (%)
    高压      high voltage 
    （KV）     		分接范围 Tap Range 低压         low voltage（KV）
    50 35  
    38.5    		 ±5         ±2×2.5% 0.4 Yyn0  
    Dyn11    		 130 1200/1140 1.30  6.5
    100 185 2010/1910 1.10  6.5
    125 215 2370/2260 1.10  6.5
    160 225 2820/2680 1.00  6.5
    200 270 3320/3160 1.00  6.5
    250 320 3950/3760 0.95  6.5
    315 385 4750/4530 0.95  6.5
    400 465 5740/5470 0.85  6.5
    500 545 6910/6580 0.85  6.5
    630 665 7860 0.65  6.5
    800 785 9400 0.65  6.5
    1000 920 11500 0.65  6.5
    1250 1120 13900 0.60  6.5
    1600 1350 16600 0.60  6.5
    2000 1590 19700 0.55  6.5
    2500 1890 23200 0.55  6.5

    Key Features

    1. Oil-Immersed Cooling System
      • High-quality insulating oil for efficient heat dissipation.
      • Self-circulating oil system (ONAN) for reliable cooling.
    2. Robust Construction
      • Corrosion-resistant steel tank with anti-rust coating.
      • Sealed structure to prevent moisture ingress.
    3. High Safety Standards
      • Explosion-proof design with pressure relief device.
      • Oil level indicator and temperature monitoring system.
    4. Energy Efficiency
      • Low no-load and load losses, meeting international standards .
      • High-performance silicon steel core for reduced hysteresis losses.
    5. Voltage Regulation
      • On-load tap changer (OLTC) or off-circuit tap changer (OCTC) for voltage adjustment.
      • ±2.5% or ±5% voltage regulation range.
    6. Long Service Life
      • Designed for 30+ years of continuous operation with minimal maintenance.
      • Oil filtration and regeneration systems available.
    7. Environmental Considerations
      • Biodegradable insulating oil options (e.g., vegetable oil).
      • Oil containment system to prevent soil contamination.
    8. Customization Options
      • Available with various protection relays and monitoring devices.
      • Customizable for special applications (e.g., high-altitude or coastal areas).

    System Configuration

    1. Core & Windings
      • High-grade silicon steel core with low loss.
      • Copper or aluminum windings with Class A insulation.
    2. Oil System
      • Insulating oil (mineral oil or eco-friendly alternatives).
      • Conservator tank with breather and oil level gauge.
    3. Cooling System
      • Radiator banks for heat dissipation.
      • Optional forced-air cooling (ONAF) for larger capacities.
    4. Protection Devices
      • Buchholz relay for detecting internal faults.
      • Over-temperature and over-pressure protection.
      • Differential protection relay.
    5. Monitoring System
      • Temperature sensors .
      • Oil quality analysis ports.

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