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69KV 4200KVA 3 Phase Power Transformer

The 69kV 4200kVA three-phase power transformer is meticulously engineered to provide reliable and efficient power distribution in industrial and utility applications. Designed in compliance with IEEE standards, this transformer ensures optimal performance and longevity. It features a robust construction with copper windings and operates with a Dyn1 vector group configuration. The transformer employs ONAN (Oil Natural Air Natural) cooling, with a high-voltage tap range of ±2 x 2.5% to accommodate varying load conditions. Equipped with advanced monitoring instruments, including oil level and temperature indicators, pressure relief devices, and Buchholz relays, it ensures safe and efficient operation. The Buchholz relay detects gas accumulation and sudden oil surge, providing early fault detection. The pressure relief device safeguards the transformer by releasing excess pressure, while the oil level and temperature indicators monitor the transformer's condition. This transformer is suitable for various industrial and utility applications, offering enhanced operational reliability and efficiency.

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Product Accessories

The transformer comes with a comprehensive set of accessories to facilitate installation and maintenance:

Bushings: V Bushing 15kV 1767A (HV), H Bushing 72.5kV 630A (LV)

Cooling Equipment: Cooling radiators, fans

Monitoring Instruments: Magnetic oil gauge, pressure vacuum gauge, top oil thermometer

Safety Devices: Pressure relief device, Buchholz relay

Structural Components: Transformer lifting lugs, manhole for access, drain valve

These accessories ensure seamless integration into existing power systems and enhance operational safety.

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Product Specifications

Power Rating

4200kVA

Primary Voltage

69KV (Delta)

Secondary Voltage

4,160Y/2,400V (Wye/Delta)

Frequency

50/60Hz

Cooling Method

ONAN/ONAF

Vector Group

Dyn1

Impedance

8.5% at 5,250kVA

Load Loss

7.5kW

No-Load Loss

30kW

Standards Compliance

Conforms to IEC 60076 ANSI and IEEE specifications

Product Applications

Economy is more affordable

Product Advantages

High Efficiency

Low load and no-load losses reduce energy consumption.

Enhanced Reliability

Advanced protection and monitoring features minimize downtime.

Scalability

ONAN/ONAF cooling system allows for capacity adjustment based on load demands.

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.