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High Performance 10kV Oil-Immersed Power Transformer for Reliable Grid Distribution

The 10kV oil-immersed power transformer is a fully sealed distribution transformer designed for medium-voltage electrical networks. It is widely used in industrial plants, utility grids, renewable energy systems, and infrastructure projects where stable power supply and high efficiency are required.

Built with high-grade cold-rolled silicon steel cores and oxygen-free copper windings, this transformer delivers low loss, low noise, and high operational efficiency. The fully sealed structure eliminates the need for an oil conservator, improving insulation performance and significantly reducing maintenance requirements.

With a capacity range from 30kVA to 2500kVA, it is suitable for both small distribution systems and large-scale industrial power applications.

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    product details

    Product Parameter

    Parameter

    Specification
    Rated Capacity 30kVA – 2500kVA
    High Voltage 6kV / 10kV / 11kV
    Low Voltage 0.4kV
    Frequency 50Hz
    Tap Range ±5% or ±2×2.5%
    Connection Group Dyn11 / Yyn0
    Cooling Method ONAN (Oil Natural Air Natural)
    Insulation Class F / H Class
    No-Load Loss 80W – 1610W
    Load Loss (75℃) 630W – 21000W
    No-Load Current 0.4% – 2.1%
    Impedance Voltage 4% – 4.5%
    Insulation Level (10kV system) LI 75kV / AC 35kV

    Product Applications

    Power Grid Distribution Systems
    This transformer is widely used in national and regional power distribution networks. It efficiently steps down medium voltage power (10kV/11kV) to low voltage (0.4kV), ensuring stable electricity supply for residential areas, public utilities, and urban infrastructure. Its high efficiency design helps reduce line losses and improve overall grid performance, making it a reliable choice for utility operators.
    Industrial Power Supply Systems
    In industrial environments such as steel production, mining operations, cement manufacturing, and chemical processing plants, stable power is essential. This transformer supports continuous operation under heavy load conditions and can withstand short-time overloads up to 130% of rated capacity, ensuring uninterrupted production and system stability in demanding environments.
    Renewable Energy and Infrastructure Projects
    The 10kV oil-immersed transformer is widely applied in solar power plants, wind farms, and energy storage systems. It plays a key role in voltage regulation and grid integration, ensuring efficient energy transmission from generation sources to distribution networks. Its sealed design allows stable operation in harsh outdoor environments ranging from -45°C to +40°C.

    Product Advantages

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    Low-Loss Core Design
    High-quality core materials help reduce no-load loss and improve overall efficiency. 
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    Compact Finished Appearance
    Integrated structure design provides reliable performance and convenient installation. 
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    Long Service Life
    Sealed structure helps reduce aging and supports long-term stable operation. 
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    Reliable Manufacturing Process
    Strict factory production standards ensure consistent product quality and performance.
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    Strong Structural Stability
    Reinforced assembly structure improves mechanical strength during transportation and operation.
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    Multiple Capacity Selection
    Supports various capacity specifications for industrial and utility applications.

    Key Benefits

    The 10kV oil-immersed power transformer is a mature and highly reliable solution for modern electrical distribution systems. Its combination of high efficiency, low maintenance, and strong environmental adaptability makes it an ideal choice for utility companies, industrial facilities, and renewable energy projects.

    With proven performance in demanding applications, it ensures stable power delivery, reduced operational costs, and long-term system reliability.

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    FAQ

    1. What makes a fully sealed oil-immersed transformer different?

    It removes the oil conservator and uses a sealed tank design, reducing oil exposure to air and improving insulation aging resistance.

    2. Can this transformer operate under continuous heavy load?

    Yes, it is designed to handle stable long-term loads and short-term overloads up to approximately 130% of rated capacity.

    3. Is this transformer suitable for outdoor installation?

    Yes, it is suitable for both indoor and outdoor installation, with operating temperature range from -45°C to +40°C.

    4. What is the role of the Dyn11 connection group?

    Dyn11 helps reduce harmonic distortion, improves voltage stability, and enhances compatibility with modern power systems.

    5. How long is the typical service life?

    With proper installation and operation, the service life can reach 20–30 years depending on environmental conditions.

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