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20KV 400KVA Dry Type Transformer

Designed to modernize the 20 kV substation at the CHE Hydroelectric Power Plant, this 400 kVA dry-type transformer exemplifies cutting-edge electrical engineering. Its robust, maintenance-free construction ensures reliable operation without the need for protective casing, making it ideal for supplying 0.4 kV AC services in a 50 Hz environment. Operating without oil, this air-cooled transformer offers precise voltage control and enhanced safety, making it well-suited for demanding industrial and commercial applications.

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Product Accessories

Enhance the functionality and performance of your 20kV 400kVA Dry Type Transformer with our comprehensive range of precision-engineered accessories, each designed to optimize operation, ensure safety, and facilitate seamless integration into your power distribution system.

Standard Accessories:

Bidirectional Trolley: Designed with dual-directional wheels and a locking mechanism, this trolley ensures effortless mobility and secure positioning during installation and maintenance.

Temperature Sensors: Equipped with multiple PT100 sensors, the transformer continuously monitors winding temperatures, providing real-time data to prevent overheating and ensure operational integrity.

Integrated Temperature Control Unit: Seamlessly incorporated into the transformer's protection, signaling, and monitoring system, this unit facilitates precise temperature regulation and enhances overall system reliability.

Lifting Lugs: Strategically positioned lifting lugs simplify handling and transportation, ensuring safe and efficient movement during setup and servicing.

Neutral Terminal: An accessible neutral terminal on the low-voltage side allows for straightforward grounding, enhancing system safety during operation.

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Product Specifications

Rated Voltage

Primary 20 kV / Secondary 0.4 kV

Transformer Capacity

400KVA

Phase Configuration

3-phase

Standards

EN 60076

CEI 60076

IEC 60185

DIN-VDE 0414-1

Cooling System

Employs natural air convection to dissipate heat, eliminating the need for external cooling systems and ensuring efficient thermal management.

Insulation System

Utilizes a blend of epoxy resin and quartz powder, providing superior moisture resistance and fire safety, while ensuring maintenance-free operation.

Core Construction

Constructed from low-loss, cold-rolled silicon steel with high magnetic permeability, minimizing energy losses and enhancing overall efficiency.

Winding Design

Features copper windings with epoxy resin insulation, offering high mechanical strength to withstand short-circuit forces and ensuring long-term durability.

Insulation Class

Equipped with Class F insulation, capable of withstanding continuous operating temperatures up to 155°C.

Maximum Winding Temperature Rise

Maintains a maximum average winding temperature rise of 105°C above the ambient temperature during full-load operation.

Product Applications

Economy is more affordable

Delivers reliable electricity to office towers, shopping centers, and retail hubs.

Commercial Complexes
Supplies steady, high-quality power for manufacturing plants and process industries.

Industrial Facilities
Provides clean, stable power essential for sensitive computing environments.

Data Centers & IT Installations
Supports schools, hospitals, and municipal buildings with robust, dependable energy.

Public Utility Infrastructure

Product Advantages

Enhanced Safety

Oil-free design eliminates fire hazards and environmental risks.

Superior Energy Efficiency

Advanced construction minimizes energy losses, lowering operational costs.

Low Maintenance & Durability

Robust design ensures long-term reliability and minimal upkeep in demanding conditions.

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.