Oil-immersed Transformer
Reliable Outdoor Power Transformation Solution with High Efficiency & Long Service Life
Product Overview
Our oil-immersed transformers are designed for voltage conversion and power transmission in 6kV / 10kV / 35kV AC power systems. Using high-grade insulating oil as both insulation and cooling medium, they deliver excellent heat dissipation performance and strong overload capacity, making them ideal for outdoor and heavy-duty industrial scenarios. Available in a wide capacity range with customizable voltage configurations, they are widely deployed in power grids, industrial parks, outdoor substations and infrastructure projects, ensuring stable and efficient power supply for long-term operation.
Core Features
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High Efficiency & Low Energy Loss
Built with premium cold-rolled grain-oriented silicon steel cores and high-purity copper (or aluminum) windings, the transformer features low no-load and load losses, effectively cutting long-term operation energy consumption. It meets international energy efficiency standards, delivering measurable cost savings for 24/7 continuous operation scenarios.
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Superior Insulation & Cooling Performance
High-quality transformer oil provides dual functions of electrical insulation and heat conduction. With natural oil circulation cooling (ONAN), it efficiently dissipates heat generated during operation, maintaining stable temperature rise even under full load. It also boasts strong short-time overload capacity to handle peak power demands reliably.
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Robust Build for Harsh Outdoor Environments
The steel tank body undergoes multi-layer anti-corrosion surface treatment, delivering excellent rust resistance, moisture proofing and UV resistance. The fully sealed structure effectively prevents oil oxidation and moisture ingress, adapting to extreme temperature fluctuations and harsh open-air conditions with a service life of up to 30 years.
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Comprehensive Safety Protection
Equipped with a complete set of protection devices including oil level indicator, winding temperature gauge, pressure relief valve, gas relay and oil drain valve. It enables real-time status monitoring, rapid fault alarm and automatic pressure relief, greatly improving operation safety and simplifying routine inspection and maintenance.
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Flexible Customized Configuration
Capacity, voltage ratio, connection group and tap changer type (off-circuit / on-load) can all be fully customized to match project requirements. It can be perfectly integrated with outdoor compact substations, switchyards and various power distribution systems for diverse application needs.
Technical Specifications
- Rated voltage (HV side): 6kV / 10kV / 35kV, 50/60Hz
- Rated voltage (LV side): 0.4kV / 0.23kV (customizable)
- Capacity range: 50kVA ~ 2500kVA (larger capacity available on request)
- Cooling method: ONAN (natural oil circulation & natural air cooling)
- Tap changer: Off-circuit tap changer (standard), on-load tap changer (optional)
- Connection group: Dyn11 (standard), Yyn0 and other types available
- Insulation class: Class A
- Installation: Outdoor floor-mounted
- Protection features: Overload, short-circuit, over-temperature protection
Typical Applications
- Urban and rural power grid distribution and upgrading projects
- Power supply for industrial parks, mining areas, oilfields and large construction sites
- Core matching equipment for outdoor box-type substations and switchyards
- Power distribution for residential communities, commercial complexes and municipal facilities
- Grid connection for photovoltaic, wind power and other new energy systems
- Infrastructure projects including highways, railways and water conservancy facilities
Every oil-immersed transformer undergoes strict factory testing including no-load test, load test, insulation resistance test and dielectric strength test before delivery. We provide full-cycle technical support from scheme selection and customized manufacturing to on-site installation guidance and after-sales service, delivering reliable, efficient power transformation solutions for your outdoor power distribution projects.
