SG(B)10 Series of Non-Encapsulated Coil Three-Phase Dry Type Power Transformer – General

Overview

The SG(B)10 series non-encapsulated coil three-phase dry type power transformer is a modern, energy-efficient transformer designed for medium and low voltage power distribution systems. It is widely used in applications where high safety, environmental protection, and low maintenance are required.

Compared with oil-immersed transformers, the SG(B)10 series adopts dry-type insulation technology, eliminating the risk of oil leakage, fire hazards, and environmental pollution. Its non-encapsulated coil structure offers excellent heat dissipation, stable electrical performance, and convenient inspection and maintenance.

Product Characteristics

The SG(B)10 series features advanced design concepts combined with mature manufacturing processes, ensuring reliable operation under various working conditions.

Key characteristics include:

• Non-encapsulated coil structure with natural or forced air cooling

• High mechanical strength and thermal stability

• Low partial discharge and low noise level

• Strong resistance to short-circuit and thermal shock

• Environmentally friendly and flame-retardant design

These features make the transformer suitable for indoor installations and densely populated areas.

Non-Encapsulated Coil Design

Unlike fully cast resin transformers, the SG(B)10 series uses non-encapsulated windings with high-quality insulation materials.

Advantages of this design include:

• Improved heat dissipation efficiency

• Reduced internal stress during thermal expansion

• Easier inspection and maintenance

• Lower manufacturing cost compared with fully encapsulated designs

The windings are treated with advanced insulation processes to ensure reliable dielectric performance and long service life.

Electrical Performance

The SG(B)10 series is designed to meet modern power system requirements, with optimized electromagnetic design to reduce losses and improve efficiency.

Typical electrical performance advantages:

• Low no-load loss and load loss

• Stable voltage regulation

• High insulation class for safe long-term operation

• Excellent overload capability under specified conditions

These characteristics contribute to reduced operating costs and improved energy efficiency.

Cooling Method

The standard cooling method for the SG(B)10 series is AN (Air Natural). For higher capacity or demanding environments, AF (Air Forced) cooling can be applied.

Cooling system benefits:

• Simple structure and high reliability

• No cooling liquid required

• Low maintenance requirements

• Efficient heat dissipation for continuous operation

Safety and Environmental Protection

Safety is a key advantage of dry type transformers. The SG(B)10 series is designed with fire safety and environmental protection in mind.

Safety features include:

• No oil, eliminating fire and explosion risks

• Flame-retardant insulation materials

• Low smoke emission in case of overheating

• Compliance with modern environmental regulations

This makes the transformer suitable for installation in buildings, underground facilities, and public infrastructure.

transformer 30kva 50kva 60kva Dry type transformer

Typical Applications

The SG(B)10 series non-encapsulated coil three-phase dry type power transformer is widely used in:

• Urban power distribution networks

• Commercial and residential buildings

• Industrial plants and factories

• Hospitals, schools, and data centers

• Metro systems and underground substations

Its reliable performance and compact design make it ideal for indoor power distribution systems.

Installation and Maintenance

Installation of the SG(B)10 series is simple and flexible due to its dry-type design.

Installation and maintenance advantages:

• No oil handling or containment systems required

• Reduced space requirements

• Easy visual inspection of windings

• Lower maintenance workload compared with oil-immersed transformers

Regular cleaning and basic inspection are generally sufficient to ensure long-term operation.

Standards and Compliance

The SG(B)10 series is manufactured in accordance with relevant national and international standards for dry type transformers. Each unit undergoes routine testing to verify electrical performance, insulation integrity, and mechanical strength.

Compliance with standards ensures:

• Safe integration into power systems

• Consistent quality and reliability

• Compatibility with modern distribution networks

Conclusion

The SG(B)10 series of non-encapsulated coil three-phase dry type power transformer offers a balanced combination of safety, reliability, energy efficiency, and environmental protection. Its non-encapsulated coil design provides excellent heat dissipation and ease of maintenance, making it a practical solution for modern power distribution applications.

For projects requiring safe indoor installation, reduced fire risk, and stable long-term performance, the SG(B)10 series is a dependable and cost-effective choice.