Why Choose an Oil Immersed Transformer for Reliable Power Solutions?
2025-09-16
In modern electrical power systems, the demand for stable, efficient, and safe distribution of electricity continues to rise. One of the most critical components that meets these needs is the Oil Immersed Transformer. Known for its exceptional cooling capability, durability, and long service life, this type of transformer has become the backbone of industrial, commercial, and utility-scale electrical networks.
At Shanghai FATO Group Co.,Ltd., we specialize in manufacturing and supplying Oil Immersed Transformers that comply with international standards, offering customers solutions that combine performance with cost-effectiveness. This article will explain the product features, parameters, applications, and address the most common questions customers have when selecting Oil Immersed Transformers.
What Is an Oil Immersed Transformer?
An Oil Immersed Transformer is a type of electrical transformer where the windings and core are fully immersed in insulating mineral oil. The oil acts as both an insulator and a coolant. As the transformer operates, the oil absorbs the heat generated by the windings and core, then dissipates it through the tank walls and radiators.
Compared with dry-type transformers, Oil Immersed Transformers are more efficient in cooling, suitable for higher voltage and power ratings, and have a longer service life when properly maintained.
Key Advantages of Oil Immersed Transformers
-
Efficient Cooling System: Mineral oil ensures excellent heat dissipation, allowing the transformer to handle higher loads safely.
-
Durability: Long operational lifespan due to effective insulation and reduced thermal stress.
-
High Capacity: Suitable for large power transmission and distribution networks.
-
Cost-Effective: Lower initial and operational costs compared to some other transformer types.
-
Wide Application: Used in industrial plants, commercial buildings, renewable energy stations, and public utility grids.
Technical Parameters of Oil Immersed Transformer
Below are the standard product specifications provided by Shanghai FATO Group Co.,Ltd.. These parameters can be customized according to specific project requirements.
General Parameters
-
Rated Capacity: 30 kVA – 2500 kVA
-
Rated Voltage: 6 kV, 10 kV, 20 kV, 35 kV (customizable)
-
Frequency: 50 Hz / 60 Hz
-
Phase: Three-phase, two-winding
-
Vector Group: Dyn11, Yyn0 or upon request
-
Cooling Method: ONAN / ONAF (Oil Natural Air Natural / Oil Natural Air Forced)
-
Insulation Class: A Class
Performance Characteristics
| Parameter | Value Range / Standard |
|---|---|
| Rated Capacity | 30 – 2500 kVA |
| Voltage Regulation Range | ±2×2.5% or ±5% (on-load or off-load) |
| No-Load Loss | In compliance with IEC/GB standards |
| Load Loss (at 75°C) | In compliance with IEC/GB standards |
| Impedance Voltage | Standard 4% / 6% |
| Noise Level | ≤ 55 dB (low noise design optional) |
| Insulation Oil | Mineral Oil (IEC 60296) |
| Protection Level | IP00 – IP54 depending on enclosure |
Why Work with Shanghai FATO Group Co.,Ltd.?
-
Quality Assurance: Manufactured in compliance with IEC, ANSI, and GB standards.
-
Customization: Tailored designs to meet unique voltage, capacity, and installation conditions.
-
Experience: Decades of expertise in transformer design and manufacturing.
-
Global Reach: Exported to more than 30 countries with trusted service support.
-
After-Sales Service: Technical assistance, spare parts supply, and maintenance guidance.
FAQ About Oil Immersed Transformer
Q1: What is the difference between an Oil Immersed Transformer and a Dry Type Transformer?
A1: The primary difference lies in cooling and insulation methods. Oil Immersed Transformers use mineral oil for insulation and cooling, offering better heat dissipation and higher capacity, while dry type transformers use air or resin insulation, suitable for smaller loads and indoor environments.
Q2: How long is the service life of an Oil Immersed Transformer?
A2: With proper installation, regular oil testing, and preventive maintenance, an Oil Immersed Transformer can last 25–30 years or even longer. Factors such as load conditions, oil quality, and environmental conditions affect its lifespan.
Q3: What safety measures are taken with Oil Immersed Transformers?
A3: Transformers are equipped with oil level indicators, temperature gauges, pressure relief valves, and Buchholz relays to ensure safe operation. Proper grounding and regular inspection further enhance safety.
Q4: How to maintain an Oil Immersed Transformer effectively?
A4: Routine maintenance includes periodic oil analysis, checking for leaks, inspecting bushings, monitoring temperature and load levels, and cleaning the cooling system. Scheduled servicing ensures long-term reliability and performance.
Conclusion
Choosing an Oil Immersed Transformer is an investment in reliability, efficiency, and long-term performance. Whether for industrial, commercial, or utility purposes, these transformers provide unmatched stability in energy distribution. At Shanghai FATO Group Co.,Ltd., we are committed to delivering top-quality Oil Immersed Transformers that meet the highest standards of performance and safety.
For more information or inquiries, please contact us directly at Shanghai FATO Group Co.,Ltd., where our technical team is ready to provide professional consultation and support.
