Oil-Immersed Transformer
Oil-Immersed Transformers are widely used in power distribution networks, industrial facilities, and utility substations due to their high efficiency, reliability, and durability. These transformers use insulating oil for cooling and insulation, ensuring stable operation under high voltage and heavy load conditions. The oil effectively dissipates heat, extends the lifespan of the transformer, and provides excellent dielectric strength.
Compared to dry-type transformers, oil-immersed transformers offer superior overload capacity and are well-suited for outdoor installations in harsh environments. They are available in various configurations, including sealed and conservator-type designs, to meet different application requirements. With high thermal performance, strong resistance to electrical faults, and cost-effective maintenance, oil-immersed transformers remain a preferred solution for large-scale power transmission and distribution systems.
Oil-Immersed Transformers are a cornerstone of modern power infrastructure, playing a crucial role in voltage regulation and efficient power transmission. These transformers are designed to withstand heavy electrical loads while maintaining optimal performance through the cooling and insulating properties of transformer oil. The oil serves as both a heat dissipation medium and a dielectric insulator, preventing electrical breakdown and ensuring the longevity of internal components.
One of the key advantages of Oil-Immersed Transformers is their ability to handle high power capacities with minimal energy loss. Their robust design makes them ideal for industrial zones, renewable energy farms, and high-voltage substations, where reliability is a top priority. Additionally, modern designs incorporate environmentally friendly insulating oils, reducing environmental impact while maintaining high performance. Whether used in grid expansion projects or industrial applications, Oil-Immersed Transformers provide a stable, cost-effective, and energy-efficient solution for large-scale power distribution.
Key Features of Oil-Immersed Transformer
- High-Quality Core Material: Made from CRGO (Cold-Rolled Grain-Oriented) silicon steel, ensuring low core losses and high efficiency.
- Energy-Saving & Cost-Effective: Optimized power distribution reduces energy consumption and operational costs.
- Strong Electrical Protection: Designed to withstand voltage surges, short circuits, and lightning strikes for improved safety.
- Reliable & Durable: Built with a strong support structure to ensure long-term stability under heavy load conditions.
- Efficient Cooling: Insulating oil enhances heat dissipation, preventing overheating and prolonging transformer lifespan.
- Flexible Installation: Suitable for both indoor and outdoor environments, even in extreme weather conditions.
- Low Noise Operation: Designed for quiet performance, making it ideal for industrial, commercial, and residential areas.
- Custom Voltage & Power Options: Available in various voltage levels from 6kV to 110kV, tailored to different grid and industry needs.
- Eco-Friendly & Sustainable: Uses biodegradable insulating oil, reducing environmental impact and maintenance requirements.
- Compliant with Global Standards: Manufactured to IEC, ANSI, GB, and ISO standards, ensuring safety and compatibility with various power systems.
Oil-Immersed Transformer: Reliable and Efficient Power Distribution
The Oil-Immersed Transformer is a widely used electrical device designed for high-efficiency power transmission and distribution. These transformers use insulating oil for cooling and insulation, ensuring stable operation under heavy loads and extreme conditions. Compared to dry-type transformers, Oil-Immersed Transformers offer superior heat dissipation, longer lifespan, and higher overload capacity, making them ideal for industrial, commercial, and utility applications.
What is an Oil-Immersed Transformer?
An Oil-Immersed Transformer is a type of power transformer where the windings and core are fully submerged in insulating oil. This oil serves two primary functions: providing electrical insulation and dissipating heat generated during operation. The efficient cooling mechanism allows these transformers to operate reliably in high-voltage and high-power environments.
How Does an Oil-Immersed Transformer Work?
The working principle of an Oil-Immersed Transformer is based on electromagnetic induction. The transformer consists of a laminated core and windings enclosed in a sealed tank filled with insulating oil. When an AC voltage is applied to the primary winding, a magnetic field is created in the core, inducing voltage in the secondary winding. The oil acts as an insulator and coolant, preventing overheating and improving electrical insulation performance.
Key Features of Oil-Immersed Transformers
- High Efficiency & Low Loss: Designed with premium materials to minimize energy loss and improve efficiency.
- Superior Cooling System: Uses high-quality insulating oil to effectively dissipate heat, ensuring stable performance even under heavy loads.
- Extended Lifespan: Oil-immersed transformers have a longer service life due to reduced thermal stress on the components.
- High Overload Capacity: Designed to handle temporary overloads without significant performance degradation.
- Weather-Resistant & Durable: Suitable for outdoor installations with protective enclosures to withstand extreme environmental conditions.
- Low Maintenance Requirements: Fully sealed and conservator-type designs minimize maintenance needs and prevent oil contamination.
- Multiple Voltage & Capacity Options: Available in various voltage ratings (6kV - 110kV) and capacities (up to 5000KVA) to meet diverse power system requirements.
- Compliance with International Standards: Designed and tested according to IEC, ANSI, BS, JEC, and other global standards.
Types of Oil-Immersed Transformers
There are several types of Oil-Immersed Transformers, each suited to specific applications:
- Sealed Oil-Immersed Transformer: Fully enclosed structure prevents oil exposure to air, reducing aging and maintenance requirements.
- Conservator-Type Transformer: Includes an oil conservator tank to accommodate oil expansion and contraction, enhancing operational stability.
- Power Transformers: Used in high-voltage transmission networks to step up or step down voltage levels.
- Distribution Transformers: Designed for industrial and residential power distribution, ensuring a steady electricity supply.
Applications of Oil-Immersed Transformers
Due to their high efficiency, durability, and adaptability, Oil-Immersed Transformers are widely used in various industries and infrastructure projects:
- Utility Substations: Integral to national power grids, ensuring stable voltage regulation and distribution.
- Industrial Plants: Provides continuous power supply for heavy machinery, reducing operational disruptions.
- Renewable Energy Systems: Used in solar farms and wind power plants for efficient power conversion and distribution.
- Commercial Buildings: Supplies reliable power to high-rise offices, shopping malls, and large complexes.
- Oil & Gas Industry: Essential for offshore platforms and refineries where robust, high-capacity power solutions are required.
Technical Specifications
- Maximum Voltage: 36kV
- Maximum Capacity: 5000KVA
- Frequency: 50Hz / 60Hz
- Insulation Class: A, B, F, or H
- Cooling Method: ONAN (Oil Natural Air Natural) or ONAF (Oil Natural Air Forced)
- Efficiency: ≥98%
- Protection Level: IP00, IP20, or customized upon request
Maintenance and Safety Considerations
Regular maintenance of Oil-Immersed Transformers is crucial for ensuring long-term reliability. Here are some key maintenance tasks:
- Periodic oil analysis to check for contaminants and dielectric strength.
- Inspecting seals and gaskets to prevent leaks and moisture ingress.
- Checking for overheating signs and ensuring proper ventilation.
- Cleaning external components to remove dust and debris.
Oil-Immersed Transformer vs. Dry-Type Transformer
Choosing between an Oil-Immersed Transformer and a Dry-Type Transformer depends on the application and operating environment:
| Feature | Oil-Immersed Transformer | Dry-Type Transformer |
|---|---|---|
| Cooling Medium | Insulating Oil | Air or Epoxy Resin |
| Overload Capacity | High | Moderate |
| Maintenance | Periodic Oil Inspection Required | Low Maintenance |
| Environmental Suitability | Ideal for Outdoor Use | Better for Indoor Applications |
| Installation Cost | Lower | Higher |
The Oil-Immersed Transformer remains one of the most reliable and efficient power distribution solutions available today. With superior cooling, high overload capacity, and long service life, it is widely used across various industries. Whether for industrial plants, utility substations, or renewable energy projects, Oil-Immersed Transformers provide stable, cost-effective, and durable power distribution, ensuring the seamless operation of electrical networks worldwide.
