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44kV 4000kVA Three Phase Oil Immersed Transformer

44kV 4000kVA Three Phase Oil Immersed Transformer

44kV 4000kVA Three Phase Oil Immersed Transformer by Welldone Power Transformer meets CSA C88 standards for reliable power conversion across North and South America. This step-down transformer efficiently converts a 44kV primary supply to a stable secondary output of 600Y/346V, ensuring seamless integration into industrial power networks. Engineered with an advanced KNAN/KNAF cooling system and robust fan assembly, it maintains optimal operating temperatures under load. Eco-friendly vegetable oil is used as the insulating medium to enhance performance, extend service life, and support sustainable operations. Safety features include precise oil level and temperature monitoring with automatic alarms and protective trip contacts, along with a secured oil drain valve to prevent unauthorized access.

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Product Accessories

High Voltage Bushing Well:
Rated at 52kV/417A, this component ensures secure, high-performance connections in high-voltage applications.

Low Voltage Bushing:
Featuring the FTGl-1/4000 design with eight connection ports, it provides stable and reliable low voltage distribution.

Tap Changer:
Integrated for precise voltage adjustment, this feature ensures smooth transitions and optimal power quality.

Core Ground Bushing:
Enhances system safety by providing effective grounding for the transformer’s core.

Oil Level Gauge with Contacts:
Offers accurate monitoring of oil levels, ensuring the transformer operates within safe parameters.

Oil Temperature Indicator with Contacts:
Provides real-time temperature monitoring, coupled with contact-based alerts for enhanced operational safety.

Pressure Relief Device:
Protects the transformer by safely releasing excess pressure, maintaining system integrity.

Pressure Vacuum Gauge:
Monitors internal pressures to ensure optimal performance and early fault detection.

Lifting Hook:
A robust lifting hook facilitates secure and safe handling during installation and maintenance.

Name Plate:
Clearly displays essential transformer specifications for quick reference and compliance verification.

Local Control Panel (NEMA 3R):
A weather-resistant control panel designed for convenient on-site adjustments and monitoring.

Radiators & Cooling Fan:
Integrated thermal management components that ensure efficient heat dissipation and maintain optimal operating temperatures.

Oil Upper Filtering Valve:
Enhances oil purity by filtering contaminants, thus prolonging the transformer's service life.

Oil Drain Valve with 3/8" Sampler:
Allows safe and convenient oil sampling and draining, supporting routine maintenance.

Gas Filling Valve with Protective Cover:
Provides secure gas filling with a protective cover to prevent unauthorized access.

Top Hand Hole:
Designed for easy access, this feature simplifies maintenance and inspection tasks.

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Product Specifications

Voltage Rating

44KV

Apparent Power

4000KVA（4MVA）

Phase Configuration

Three-Phase

Frequency

50/60Hz

Cooling Method

KNAN/KNAF

Winding Material

Copper

Impedance

7.65%

Dimensions

2230mm x 2152mm x 2687mm

Total Weight

8800Kg (Tank & Accessories: 2800Kg; Oil: 2150Kg)

Standards Compliance

Conforms to IEC 60076 ANSI and IEEE specifications

Product Applications

Economy is more affordable

Optimized for heavy manufacturing and processing plants, ensuring consistent high-voltage power supply for critical operations.

Industrial Facilities
Designed for metropolitan substations, delivering stable energy distribution with minimal downtime.

Urban Substations
Ideal for supporting grid-connected renewable sources, enhancing overall network resilience.

Renewable Energy Integration
Perfect for new projects in energy-intensive sectors like mining and construction, where reliability is paramount.

Infrastructure Development

Product Advantages

Efficient Performance

Ultra-low load and no-load losses maximize energy efficiency and operational cost savings.

Advanced Thermal Management

Integrated KNAN/KNAF cooling and high-grade insulation extend service life and maintain optimal performance.

Robust and Safe Design

Superior construction with copper windings, NLTC with five tap positions, and comprehensive safety features ensure durable, secure operation.

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.