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High-Performance 33kV Oil-Immersed Power Transformer for Efficient Medium-Voltage Distribution

The 33kV oil-immersed power transformer is a high-efficiency electrical device designed for medium-voltage distribution systems in industrial, utility, and large-scale infrastructure applications. It provides stable power conversion from 33kV to low-voltage levels for effective energy transmission across power grids.

Built using high-quality cold-rolled silicon steel cores and oxygen-free copper windings, this transformer ensures low energy loss, minimal noise, and robust thermal performance. The fully sealed design enhances the transformer's durability, preventing oxidation and prolonging its lifespan to over 30 years under normal operational conditions.

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    product details

    Product Parameter

    Parameter

    Specification
    Rated Capacity 30kVA – 2500kVA
    High Voltage 33kV
    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 100W – 2000W
    Load Loss (75℃) 800W – 25000W
    No-Load Current 0.4% – 2.0%
    Impedance Voltage 4% – 6%
    Insulation Level LI 145kV / AC 60kV

    Product Applications

    Regional and Substation Power Distribution Networks
    The 33kV oil-immersed transformer is a critical component of regional power distribution systems, stepping down high-voltage electricity for residential, commercial, and municipal use. It provides a reliable, energy-efficient solution for long-distance power transmission, with an operational efficiency of up to 98%, reducing transmission losses in large-scale grids and urban power distribution networks.
    Large-Scale Industrial and Manufacturing Operations
    Ideal for energy-intensive industries such as steel production, chemical plants, and cement factories, the 33kV transformer can handle the continuous high load required by industrial operations. It supports overload conditions up to 130% of rated capacity, ensuring uninterrupted power supply and reducing operational downtime in demanding environments.
    Renewable Energy and Infrastructure Projects
    The 33kV transformer is well-suited for integration into renewable energy systems like solar and wind farms, as well as large infrastructure projects such as transportation systems and data centers. Its robust construction and reliable performance under variable conditions make it perfect for environments that require high-efficiency voltage regulation and stable grid integration.

    Product Advantages

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    Robust Finished Structure
    Compact and durable finished structure ensures reliable performance during transportation and operation.
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    Reliable Finished Product Design
    Compact and durable structure ensures stable long-term operation performance. 
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    Complete Sealed Structure
    Sealed tank reduces external influence and supports extended service life. 
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    Improved Operational Safety
    Advanced manufacturing process enhances insulation reliability and operating stability. 
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    Stable Structural Assembly
    Reinforced design improves mechanical stability during operation and transportation. 
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    Flexible Distribution Capacity
    Suitable for different distribution systems with multiple capacity configurations.

    Key Benefits

    The 33kV oil-immersed power transformer is a highly reliable and efficient solution for medium-voltage power distribution. Its ability to provide stable voltage regulation in industrial, utility, and renewable energy applications makes it indispensable for modern power grids. With excellent thermal management, low operational costs, and extended service life, this transformer ensures dependable performance for years to come.

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    FAQ

    1. How does a 33kV transformer compare to lower voltage models?

    The 33kV transformer is designed to handle medium-voltage distribution systems, providing more reliable voltage regulation for larger power networks and industrial applications that require higher capacity.

    2. Is the 33kV transformer suitable for outdoor installation?

    Yes, the transformer’s sealed structure is designed for both indoor and outdoor installations, making it ideal for renewable energy plants, substation installations, and urban power distribution systems.

    3. Can this transformer handle frequent overload conditions?

    Yes, the 33kV transformer can handle short-term overloads up to 130% of its rated capacity, ensuring uninterrupted operation in environments with fluctuating energy demands.

    4. What cooling system is used in this transformer?

    It uses the ONAN (Oil Natural Air Natural) cooling method, where natural oil circulation and air cooling ensure efficient heat dissipation, allowing the transformer to operate under continuous load conditions.

    5. Is customization available for specific project requirements?

    Yes, the 33kV transformer can be customized in terms of voltage ratings, capacity, connection group, and tap range based on specific project needs.

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