Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of oil filled power transformer in China. If you're going to wholesale durable oil filled power transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Zhejiang Hengli Electrical manufactures Oil Filled Power Transformers for utility networks, substations, industrial plants and commercial power systems. Using mineral oil or other specified insulating liquids as the cooling and insulation medium, these transformers provide efficient heat dissipation and stable operation under continuous electrical loads.
For overseas projects, transformer selection depends on more than rated capacity. System voltage, frequency, installation conditions, cooling method, impedance, tap range and protection requirements all affect the final design. As a direct power transformer factory, Zhejiang Hengli Electrical supports OEM/ODM customization according to project specifications, grid requirements and local standards.
Main Parameters
|
Item |
Typical Range / Option |
|
Transformer Type |
Oil Filled / Oil Immersed Power Transformer |
|
Rated Capacity |
Customized according to project requirements |
|
Primary Voltage |
Customized, including medium and high voltage systems |
|
Secondary Voltage |
Customized |
|
Frequency |
50 Hz / 60 Hz |
|
Phase |
Single Phase / Three Phase |
|
Cooling |
ONAN / ONAF and other configurations |
|
Tap Changer |
Off-circuit or On-load Tap Changer |
|
Insulation Medium |
Transformer Oil or specified liquid |
|
Winding Material |
Copper or Aluminum |
|
Applicable Standard |
IEC 60076 or equivalent project standards |
Construction and Key Components
An oil filled power transformer consists of a magnetic core, high-voltage and low-voltage windings, insulating system, transformer tank and cooling structure. Depending on the transformer rating and application, additional components can include bushings, conservator, breather, oil level indicator, pressure relief device, temperature indicator, drain valve and tap changer.
The core is designed to control no-load loss and operating noise, while the windings are insulated and mechanically supported to withstand thermal and electrical stresses during service. The transformer tank is engineered to contain the insulating liquid and protect internal components from the external environment.
Why Choose Our Oil Filled Power Transformer?
For B2B buyers, the key advantage is not simply transformer capacity, but whether the equipment can integrate reliably into the complete power system.
Efficient heat dissipation
Oil transfers heat away from the windings and core effectively, making oil immersed construction suitable for continuous-duty applications.
01
Flexible project configuration
Voltage ratio, vector group, impedance, tap range, winding material, cooling arrangement and enclosure details can be adjusted to match project requirements.
02
Reliable long-term operation
Properly designed oil insulation provides both electrical insulation and thermal management, supporting stable transformer performance under varying loads.
03
Factory-direct manufacturing
Zhejiang Hengli Electrical supplies transformers directly from the factory, helping buyers communicate technical requirements efficiently and reduce unnecessary intermediary costs.
04
Testing and documentation
Depending on the project, routine test reports, technical drawings, nameplate data and other manufacturing documents can be provided for inspection, approval and installation.
05
Applications
Oil Filled Power Transformers are widely used in:
- Utility distribution networks and substations
- Industrial factories and processing facilities
- Commercial buildings and infrastructure
- Renewable energy projects
- Mining and heavy-duty electrical systems
- Residential and urban power distribution
- Transformer substations and grid connection projects
Factory Capability
We provide:
- Direct manufacturer pricing: Factory-direct (Best price for 100% upfront).Skip the middleman and the long wait.
- MOQ: 1 unit – flexible cooperation
- Large stock available, fast delivery
- Service: No bidding, no delays, direct deal for private projects.
- Quality tested. Ready for your mines & factories in your country.
- Standard production lead time: 15 days
- Focused on Chinese power transformer supply with stable quality and compliance with multiple international standards.
- Power utilities, installers, and EPC contractors are welcome for long-term cooperation.
Quality Assurance
Quality control is embedded in every production procedure. Every finished oil type distribution transformer undergoes comprehensive and rigorous full acceptance testing before delivery. We complete a full range of professional tests including no-load loss test, load loss test, insulation resistance test, voltage transformation ratio test, temperature rise test and sealing performance inspection. This zero-compromise testing standard ensures every single unit shipped to customers is fully qualified, stable and compliant with international power equipment standards.
FAQ
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