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High-Reliability 15kV Oil-Immersed Power Transformer for Medium-Voltage Distribution

The 15kV oil-immersed power transformer is designed for medium-voltage distribution systems requiring stable performance, high efficiency, and long service life. It is widely used in industrial plants, utility networks, and infrastructure projects where 15kV voltage levels are specified.

Featuring a fully sealed structure, premium silicon steel core, and oxygen-free copper windings, this transformer delivers low energy loss, reduced noise levels, and excellent thermal performance. The sealed oil tank prevents moisture ingress and oxidation, ensuring reliable operation and extending the lifespan to over 25 years under standard conditions.

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    product details

    Product Parameter

    Parameter

    Specification
    Rated Capacity 30kVA – 2500kVA
    High Voltage 15kV
    Low Voltage 0.4kV (customizable)
    Frequency 50Hz / 60Hz
    Tap Range ±5% or ±2×2.5%
    Connection Group Dyn11 / Yyn0
    Cooling Method ONAN (Oil Natural Air Natural)
    Insulation Class Class F / Class H
    No-Load Loss 85W – 1700W
    Load Loss (75℃) 700W – 22000W
    No-Load Current 0.4% – 2.0%
    Impedance Voltage 4% – 6%
    Insulation Level LI 95kV / AC 38kV

    Product Applications

    Utility Power Distribution Networks
    The 15kV oil-immersed transformer is widely used in regional utility grids and substation systems. It efficiently converts medium voltage to low voltage, ensuring stable electricity supply for residential and commercial areas. With operational efficiency reaching over 98%, it helps reduce transmission losses and improves overall grid performance, making it ideal for long-distance power distribution networks.
    Industrial Manufacturing Facilities
    In heavy industries such as steel production, oil & gas, and large-scale manufacturing plants, stable power supply is essential. This transformer supports continuous operation under high-load conditions and can withstand short-term overloads up to 130% of rated capacity, ensuring uninterrupted production and minimizing downtime in energy-intensive environments.
    Infrastructure & Renewable Energy Projects
    The 15kV transformer is commonly used in infrastructure projects such as transportation systems, commercial complexes, and renewable energy installations like solar and wind farms. It ensures stable voltage regulation and efficient grid connection. Designed for outdoor environments, it operates reliably in temperature ranges from -40°C to +45°C, making it suitable for various climate conditions.

    Product Advantages

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    Stable Energy Efficiency
    Optimized transformer configuration supports efficient and reliable power operation. 
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    Integrated Durable Structure
    Finished transformer structure provides reliable mechanical strength and durability. 
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    Reliable Sealing Performance
    Fully sealed design helps maintain stable internal operating conditions. 
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    Enhanced Insulation Quality
    Vacuum oil processing improves insulation effectiveness and long-term reliability. 
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    Robust Mechanical Support
    Reinforced assembly design enhances operational stability and transportation protection. 
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    Comprehensive Capacity Range
    Supports a wide range of capacities for various power distribution requirements.

    Key Benefits

    The 15kV oil-immersed power transformer is a dependable and efficient choice for medium-voltage power distribution systems. With its advanced design, low loss performance, and strong adaptability, it meets the needs of utility networks, industrial operations, and infrastructure projects.

    Its combination of durability, efficiency, and low maintenance makes it a cost-effective investment for long-term power system reliability.

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    FAQ

    1. What makes 15kV transformers suitable for specific projects?

    They are designed to match certain grid standards and industrial systems where 15kV voltage levels are required for compatibility and performance.

    2. Can this transformer be used in both indoor and outdoor environments?

    Yes, it is designed for flexible installation and performs reliably in both indoor and outdoor conditions.

    3. What kind of insulation system is used?

    It uses high-quality oil insulation combined with solid insulation materials to ensure safe and stable operation.

    4. How is heat dissipated in this transformer?

    Heat is naturally dissipated through oil circulation and air cooling using the ONAN method, ensuring efficient thermal management.

    5. Is customization available for different project requirements?

    Yes, parameters such as capacity, voltage ratio, and connection group can be customized based on project needs.

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