Intermediate Transformers – An Efficient Power Transmission Solution

1. What is an Intermediate Transformer?

An intermediate transformer (also known as a medium-voltage transformer) is a crucial device in the power transmission system. It plays the role of changing the voltage level from high to low or vice versa to meet the electrical needs of industrial and residential systems. Operating at medium voltage levels from 6kV to 35kV, intermediate transformers are an optimal solution for transmitting and distributing electricity.

2. Working Principle of an Intermediate Transformer

Intermediate transformers operate based on the principle of electromagnetic induction. When alternating current passes through the primary winding, it generates a varying magnetic field, which in turn induces a current in the secondary winding. This process helps adjust the voltage as desired, usually reducing it for distribution to different usage areas.

3. Advantages of Intermediate Transformers

• High Efficiency: Intermediate transformers are designed with an energy conversion efficiency of up to 99%, minimizing power loss.
• Durability and Reliability: These transformers are often manufactured with advanced technology, ensuring long service life and stable performance over time.
• Reduced Operating Costs: Thanks to high efficiency and good durability, the maintenance and operational costs of intermediate transformers are optimized.

4. Applications of Intermediate Transformers

• In Industry: Large factories and production plants often use intermediate transformers to provide stable voltage to machinery and equipment.
• In Power Distribution Systems: Intermediate transformers are a key component of the power grid, helping distribute power from power stations to substations.
• In Renewable Energy: Intermediate transformers play an important role in connecting renewable energy sources like wind and solar power to the national grid.

5. Considerations When Choosing an Intermediate Transformer

• Appropriate Capacity: It’s essential to determine the exact capacity needed to ensure the transformer operates efficiently without being overloaded.
• Quality and Brand: Opt for reputable brands to ensure the quality of the product and reliable after-sales service.
• Warranty Check: Transformers are high-value devices, so warranty duration and after-purchase support services are very important.

6. Conclusion

Intermediate transformers play an indispensable role in the power transmission and distribution system. With their superior efficiency and durability, they offer an optimal solution for businesses and power systems to operate effectively, safely, and sustainably.

Đạt các tiêu chuẩn theo các hệ thống quản lý chất lượng

•  Measurement of winding resistance
•  Measurement of voltage ratio and check of phase displacement
•  Measurement of short-circuit impedance and loss
•  Measurement of no-load loss and current
•  Dielectric routine tests
•  Tests on on-load tap-changers, where appropriate
•  Leak testing with pressure for liquid-immersed transformers(tightness test)
•  Tightness tests and pressure tests for tanks for gas-filled transformers
•  Check of the ratio and polarity of built-in current transformers
•  Check of core and frame insulation for liquid immersed transformers with core or frame insulation