Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of three winding oil immersed power transformer in China. If you're going to wholesale durable three winding oil immersed power transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Hengli's three winding oil immersed power transformer is engineered for stable power transmission and distribution, widely applied in power plants, substations, industrial parks and mining facilities. Featuring three independent windings, the equipment can realize multiple voltage conversion, effectively satisfy simultaneous power supply for different voltage-level loads and optimize grid operation structure.
63kV 66kV 69kV three phase oil-immersed power transformers serve as a key equipment inside secondary substations, often called intermediate substations in power networks. They accept high-voltage electricity transmitted from primary substations and convert it into lower voltages suitable for distribution networks. Through this voltage transformation, power can be delivered efficiently and reliably to all end users.
Technical Data-sheet
Product features
This transformer adopts high-quality silicon steel sheets and high-purity copper winding, which lowers no-load loss and operation noise. The sealed oil immersed structure offers excellent heat dissipation, insulation and moisture resistance, ensuring long-term continuous operation under harsh outdoor environments. Premium insulating oil isolates windings and dissipates heat rapidly, effectively preventing local overheating and insulation aging.
Strict manufacturing standards are implemented throughout production. Every unit undergoes comprehensive tests including withstand voltage, load loss and partial discharge inspection before delivery.
Our three winding oil immersed power transformer supports customized parameters on rated capacity, voltage ratio and connection group. Suitable for both urban power grid upgrading and large industrial power supply projects, it delivers safe, efficient and economical power conversion solutions for global customers.
Protection Accessories: Ensuring Safety and Reliability
Optional accessories such as the pressure relief valve, gas relay and temperature monitor are vital protective components for three winding oil immersed power transformers.
The pressure relief valve prevents transformer explosion by automatically releasing excessive internal gas and oil vapor once pressure exceeds the threshold. Mounted on the transformer tank, it needs periodic maintenance to stay responsive.
Installed on the connecting pipeline, the gas relay detects internal faults like short circuits by capturing generated gas. It activates alarms or trips power to avoid severe damage, widely adopted for oil-immersed transformers.
The temperature monitor enables real-time temperature tracking, effectively guarding against overheating and supporting secure transformer operation.
Why Choose a Chinese Transformer Manufacturer as Your Partner?
As a global core production base for transformers, China brings you multiple notable strengths:
- Mature supply chains for raw materials and components
- Cost-effective pricing versus suppliers from other markets
- Sophisticated production technologies and reliable product quality
Hengli Electrical, based in Jiangshan, Zhejiang, integrates the strengths of China's manufacturing with decades of experience in power transformer industry. We deliver tailored transformer solutions that meet diverse market requirements across the globe.
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