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11KV 2000KVA Three Phase Low Loss Distribution Transformer

11KV 2000KVA Three Phase Low Loss Distribution Transformer

The 11kV 2000kVA Three Phase Low Loss Distribution Transformer is engineered with premium materials and cutting-edge manufacturing techniques to achieve outstanding energy efficiency. Leveraging innovative coil, frame, and insulation technologies, this transformer delivers exceptionally low no-load and load losses while maintaining a balanced magnetic circuit for optimal performance. It departs from conventional designs by featuring a unique wound core structure composed of three-phase column yokes arranged in a three-dimensional triangular layout, all housed within a single frame. High-grade cold-rolled silicon steel, precision-cut using CNC technology, is continuously wound to form near-circular or folded arc configurations, and a vacuum nitrogen annealing process further enhances magnetic permeability and reduces residual stresses. With a state-of-the-art oil-immersed cooling system ensuring precise voltage regulation and minimal operational losses, this transformer sets a new benchmark for reliable, energy-efficient power distribution in both urban and industrial three-phase networks.

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Product Accessories

Core
Manufactured using high-permeability cold-rolled silicon steel sheets (e.g., Baosteel Q-series), with fully mitered stacking or wound core construction to minimize hysteresis loss, reduce no-load current, and lower noise levels.
A vacuum nitrogen annealing process is applied to eliminate residual stress and enhance electromagnetic performance.

Windings
Both high-voltage and low-voltage windings are made of oxygen-free copper conductors. The low-voltage winding features a double-layer cylindrical or helical structure, while the high-voltage winding adopts a multi-layer cylindrical design, improving short-circuit resistance and conductivity.
The windings are directly wound onto the core, ensuring a compact structure with high mechanical strength.

Oil Tank
Fully sealed corrugated tank structure, welded from high-quality steel plates. The corrugated cooling fins serve a dual purpose—enhancing heat dissipation while compensating for oil volume changes, eliminating the need for an external oil conservator and reducing overall transformer height.
Some models feature a bell-type tank for increased mechanical strength.

Cooling System
Utilizes natural oil cooling (ONAN), where the corrugated fins expand and contract with temperature fluctuations, optimizing heat dissipation efficiency.

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Product Specifications

Voltage Levels

Primary (High Voltage): 11kV (customizable to 10kV or 10.5kV)

Secondary (Low Voltage): 0.4kV (400V)

Rated Capacity

2000KVA（2MVA）

Phase Configuration

3-Phase

Frequency

50/60Hz

No-load Loss

≤1550W (typical), utilizing premium silicon steel sheets and an optimized core design, reducing losses by 20%-30% compared to traditional S11 models.

On-load Loss

≤18,300W (at 75°C), featuring a full-copper winding structure for superior conductivity and energy efficiency.

Vector Group

Dyn11 (Delta primary/Star secondary with neutral) or Yyn0, enhancing harmonic suppression and supporting unbalanced loads.

Cooling Type

ONAN (Oil Natural Air Natural), utilizing a self-cooling oil circulation system with corrugated radiator fins, maintenance-free, and suitable for outdoor installation.

Sound Level

≤55dB (measured at 1m distance), 7-10dB lower than conventional models, ideal for residential and noise-sensitive areas.

Efficiency

≥99.2% at full load, compliant with IEC 60076 standards, delivering outstanding energy savings.

Product Applications

Economy is more affordable

Ensures stable voltage and energy efficiency in manufacturing plants, minimizing operational losses and supporting high-load machinery.

Industrial Power Distribution
Provides reliable and low-noise power supply for office buildings, shopping malls, and data centers, reducing energy costs.

Commercial Complexes & Business Centers
Supports solar and wind power systems by optimizing energy transmission, ensuring efficiency in distributed power networks.

Renewable Energy Integration
Enhances electrical reliability in growing urban areas, delivering a stable power supply with minimal environmental impact.

Urban & Residential Grid Expansion

Product Advantages

High Efficiency & Energy Savings

With ≥99.2% efficiency and reduced no-load losses, the transformer significantly lowers energy consumption and operational costs.

Durable & Low-Maintenance Design

The fully sealed oil-immersed system prevents oxidation, while the ONAN cooling system ensures long-term performance with minimal maintenance.

Enhanced Safety & Reliability

Features superior insulation levels, low noise emissions, and short-circuit-resistant windings, making it ideal for sensitive and high-demand applications.

WellDone Power Transformer Plan Drawing

FAQ

What range of transformer products do you offer and which standards do they meet?

We manufacture a diverse array of transformers including Oil-Immersed Distribution Transformers, Dry Type Transformers, Power Transformers, Three Phase Pad Mounted Transformers, Single Phase Pad Mounted Transformers, Substation Transformers, and Pole Mounted Transformers. Our technical team, with nearly 20 years of industry experience, ensures that our designs comply with international standards such as ANSI, IEEE, DOE, CSA, AS, AZS, GOST, IEC, and more. Additionally, many of our products have obtained UL, cUL, and CSA certifications, affirming their safety and performance in global markets.
How do you ensure the quality and reliability of your transformers?

Our transformers are produced under a rigorous quality management system covering every stage from material selection to final testing. Each product comes with a minimum 24-month warranty, ensuring long-term safety and reliability. This commitment to quality has earned the trust of global customers and leading industry players.
What are your production lead times, customization options, and global market reach?

For standard models, our production lead time is typically 10 to 25 days, and we offer flexible OEM/ODM services for customized projects. We also tailor packaging solutions to meet specific customer requirements. Our transformers are exported worldwide—including North America, Europe, South America, Australia, Asia, and Africa—with successful partnerships involving renowned companies. For more details or personalized support, please contact us via email or WhatsApp.