Power three-phase transformer
The three-phase oil-immersed power transformer is designed using advanced core and winding technologies, providing outstanding energy-saving performance and extremely low power losses.
Equipped with a reliable insulating oil cooling system (ONAN/ONAF), the transformer ensures excellent temperature control and high overload capacity. The integral sealed corrugated tank design prevents oil aging, significantly extending the service life to up to 30 years.
With high mechanical strength, superior insulation performance, and strong short-circuit resistance, it operates stably with low noise. It is easy to install and maintain, and offers a competitive total cost. Voltage, power, vector group, and tap changer options are available to meet various needs in the industrial and energy sectors.
Product Overview
The three-phase oil-immersed power transformer is a three-phase distribution and power transformer with insulating cooling oil. It features a high-quality silicon steel core and pure copper winding, along with a fully sealed corrugated tank structure. It is widely used in 10kV/35kV power grids, industrial enterprises, commercial complexes, solar and wind power stations, mining, and rural power distribution systems for voltage conversion and power transmission.
Main design features
High-permeability cold-rolled silicon steel core, low magnetostriction, reduced no-load loss and no-load current.
High-purity oxygen-free copper winding, tightly wound, with high mechanical strength and strong short-circuit resistance.
Fully sealed corrugated radiator tank, no expansion tank required, effectively isolates air and moisture, prevents insulation aging.
High-efficiency insulating oil, serving dual functions of insulation and heat dissipation.
Standard vector group Dyn11, low harmonic distortion, stable output voltage.
Optional tap changer for voltage regulation according to operating conditions.
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Main advantages of the product
Ultra-low energy loss: optimized core and winding design, low no-load and load losses, significant long-term energy-saving effect.
Excellent heat dissipation and overload protection: natural oil cooling ONAN, good heat dissipation effect, stable operation under short-term overloads.
High safety and reliability: high insulation, arc suppression, waterproof, moisture-proof, and dust-proof, adapting to harsh outdoor operating conditions.
Low noise operation: advanced core cutting and assembly process, effectively reducing operating noise, meeting urban environment requirements.
Long service life: fully sealed structure prevents oil oxidation and moisture ingress, with a service life of up to 30 years under normal operation.
Low maintenance costs: no need for regular oil replacement or scheduled maintenance, saving on subsequent operating expenses.
Cost-effectiveness: compact design, reasonable price, lower overall investment compared to dry-type transformers.
Technical parameter range
Rated voltage: 10 kV, 35 kV (upon request)
Rated power: 50 kVA–2500 kVA, customizable for higher capacities
Cooling method: ONAN / ONAF
Vector group: Dyn11, Yyn0 (optional)
Frequency: 50 Hz / 60 Hz (upon request)
Insulation level: compliant with IEC and GB standards
Scope of application
Power distribution in urban and rural areas, electricity supply for industrial enterprises, commercial centers, and residential complexes, photovoltaic and wind energy projects, power supply for mines, railways, and highways.
Customer service
We can manufacture products with specified parameters of voltage, power, terminal positions, cooling method, protective device, and dimensions according to the customer's drawings and operating condition requirements.
