The design and material selection of 10kV, 20kV, 35kV SC (B) Series Epoxy resin cast dry-type transformers are the foundation of the entire production process. During the design phase, engineers will select the appropriate voltage level, capacity, and external dimensions based on the requirements of the usage scenario.

At the same time, material selection is also crucial. Good silicon steel sheets are usually used as the core material of transformers to improve their efficiency and usability.

The outer shell of Variable frequency transformer is generally made of steel plate and undergoes anti-corrosion treatment to ensure that the equipment can operate stably in various harsh environments for a long time.

The core components of Casting Transformer are windings and iron cores. The production of windings requires the use of high-quality wires and precise processes to ensure the number of turns and uniformity of the coils.

The iron core is manufactured by cutting and stacking silicon steel sheets, which has the function of good magnetic conductivity and reducing energy loss. At this stage, manufacturing personnel will strictly follow the design drawings and technical requirements to ensure that every component meets the standards.

10kV, 20kV, 35kV SC(B) Series Epoxy Resin Cast dry-type transformers: A Comprehensive Overview

Dry-type Transformers have become increasingly popular in modern electrical systems due to their safety, efficiency, and environmental benefits. Among them, the 10kV, 20kV, and 35kV SC(B) series epoxy resin cast dry-type transformers stand out as reliable solutions for medium-voltage applications. These transformers are widely used in industrial plants, commercial buildings, renewable energy systems, and infrastructure projects where fire safety, low maintenance, and high performance are critical.

This article explores the design, features, advantages, and applications of 10kV, 20kV, and 35kV SC(B) series epoxy resin cast dry-type transformers, providing a detailed understanding of their role in modern power distribution.

1. Design and Construction

The SC(B) series epoxy resin cast dry-type transformers are designed with advanced insulation technology, ensuring high reliability and durability. Key design elements include:

1.1 Core and Windings

The core is made of high-grade, grain-oriented silicon steel to minimize no-load losses and improve efficiency.

Windings are constructed with copper or aluminum conductors, depending on the application requirements.

The epoxy resin casting process encapsulates the windings, providing excellent mechanical strength, moisture resistance, and protection against environmental contaminants.

1.2 Insulation System

The epoxy resin insulation offers superior dielectric strength, thermal stability, and resistance to partial discharges.

Class F or Class H insulation materials ensure long-term performance even under high-temperature conditions.

The cast resin design eliminates the risk of oil leaks, making these transformers ideal for indoor installations.

1.3 Cooling System

Natural air cooling (AN) or forced air cooling (AF) options are available, depending on the load requirements.

The epoxy resin cast design enhances heat dissipation, reducing hotspots and extending transformer lifespan.

2. Key Features of 10kV, 20kV, and 35kV SC(B) Series Transformers

The SC(B) series transformers offer several distinguishing features that make them suitable for diverse applications:

2.1 High Voltage Ratings

Available in 10kV, 20kV, and 35kV voltage classes, catering to different power distribution needs.

Suitable for primary distribution networks, industrial grids, and renewable energy integration.

2.2 Fire Safety and Environmental Benefits

No flammable oil – Eliminates fire hazards, making them safe for indoor installations in hospitals, data centers, and high-rise buildings.

Low noise levels – Ideal for urban and noise-sensitive environments.

Eco-friendly – Free from toxic substances like PCBs, complying with international environmental standards.

2.3 Low Maintenance and Long Service Life

The epoxy resin encapsulation protects against dust, humidity, and chemical corrosion, reducing maintenance requirements.

Robust construction ensures a service life of 30+ years under normal operating conditions.

2.4 Energy Efficiency

Complies with IE3, IE4, or higher efficiency standards, minimizing energy losses.

Low no-load and load losses contribute to cost savings over the transformer’s lifespan.

3. Applications of SC(B) Series Epoxy Resin Cast Dry-Type Transformers

Due to their versatility and reliability, 10kV, 20kV, and 35kV SC(B) series transformers are used in various sectors:

3.1 Industrial Facilities

Power distribution in manufacturing plants, mining operations, and petrochemical industries.

Suitable for harsh environments with high dust or humidity levels.

3.2 Commercial and Infrastructure Projects

Hospitals, airports, shopping malls, and office buildings where fire safety is critical.

Underground substations and metro systems requiring compact, maintenance-free solutions.

3.3 Renewable Energy Integration

Step-up transformers for solar and wind farms, ensuring efficient power transmission to the grid.

Compatible with 35kV systems in large-scale renewable energy projects.

3.4 Data Centers and Critical power systems

High reliability and low failure rates make them ideal for uninterrupted power supply (UPS) systems.

Resistant to short circuits and voltage fluctuations, ensuring stable operation.

4. Advantages Over oil-immersed transformers

Compared to traditional oil-filled transformers, the SC(B) series epoxy resin cast dry-type transformers offer significant benefits:

No fire risk – Eliminates the need for fireproof vaults or containment systems.

Lower maintenance costs – No oil testing, filtration, or leakage repairs required.

Space-saving – Compact design allows for flexible installation in confined spaces.

Better overload capacity – Epoxy resin insulation withstands temporary overloads without degradation.

5. Selection and Installation Considerations

When choosing a 10kV, 20kV, or 35kV SC(B) series transformer, the following factors should be considered:

Load requirements – Determine the kVA rating based on peak and average loads.

Cooling method – Natural cooling (AN) for standard applications; forced air cooling (AF) for high-load scenarios.

Environmental conditions – Ensure proper ventilation and protection against excessive dust or moisture.

Standards compliance – Verify adherence to IEC, IEEE, or local regulations for safety and performance.

6. Conclusion

The 10kV, 20kV, and 35kV SC(B) series epoxy resin cast dry-type transformers represent a modern, efficient, and safe solution for medium-voltage power distribution. Their flame-retardant design, low maintenance, and high efficiency make them an excellent choice for industries, commercial buildings, and renewable energy systems.

As the demand for eco-friendly and reliable transformers grows, the SC(B) series continues to play a vital role in advancing electrical infrastructure worldwide. Whether for industrial plants, urban power networks, or green energy projects, these transformers provide a future-proof, sustainable, and high-performance power distribution solution.

By understanding their features, benefits, and applications, engineers and project planners can make informed decisions when selecting dry-type transformers for their electrical systems.

This article provides a detailed technical overview while avoiding any company-specific references, focusing instead on the general specifications, advantages, and applications of 10kV, 20kV, and 35kV SC(B) series epoxy resin cast dry-type transformers. Let me know if you need any modifications!