SGB Series Three-Phase Non Encapsulated Dry-Type Transformer

Comewill factory's SGB Series Three-Phase Non Encapsulated Dry-Type Transformer is a solution for users seeking to buy dry-type transformers for industrial and commercial applications. Designed with cutting-edge insulation, magnetic circuit optimization, and modular construction, this transformer offers high safety, efficiency, and environmental adaptability.

What is a SGB Series Three-Phase Non Encapsulated Dry-Type Transformer？

The SGB Series Three-Phase Non Encapsulated Dry-Type Transformer is a non-encapsulated dry-type transformer that uses advanced vacuum pressure impregnation (VPI) technology instead of traditional resin casting. It is specifically designed for:

Medium-voltage to low-voltage power transformation (10–35kV / 0.4kV)

Indoor and semi-outdoor installations

Applications requiring high fire safety and moisture resistance

Product Features

The SGB Series Three-Phase Non Encapsulated Dry-Type Transformer integrates multiple advanced technologies to ensure reliable and efficient operation:

1. Advanced Magnetic Core Design

High-permeability laminated silicon steel

Stepped lap structure reduces core loss

Effectively suppresses third harmonic distortion

2. High-Performance Insulation System

Dual insulation system (H-class + NOMEX®)

Excellent thermal resistance and dielectric strength

Resistant to chemical corrosion and humidity

3. Optimized Winding Structure

High-voltage: Layered cake structure

Low-voltage: Foil winding for uniform current distribution

Enhanced short-circuit resistance and mechanical strength

4. Efficient Thermal Management

Open ventilation design improves cooling efficiency

Low loss materials reduce heat generation

Stable operation even in >95% humidity environments

5. VPI Manufacturing Process

Secondary vacuum pressure impregnation

Strong moisture-proof and pollution-resistant capability

Extremely low partial discharge, extended service life

6. Safety and Environmental Protection

Non-flammable and explosion-proof design

Fully recyclable materials

Meets international environmental standards

Technical Specifications

Product Applications

Offshore platforms and marine environments

Chemical and petrochemical plants

High-rise commercial buildings and data centers

Airports, hospitals, and rail transit systems

Industrial manufacturing facilities

Humid or high-temperature regions (tropical climates)

Maintenance Methods

The modular and open structure makes maintenance of SGB Series Three-Phase Non Encapsulated Dry-Type Transformer simple and cost-effective:

Regular Inspection

Check for dust accumulation and clean ventilation channels

Inspect connections for looseness or overheating

Environmental Monitoring

Ensure proper ventilation and avoid excessive contamination

Maintain humidity within recommended limits when possible

Electrical Testing

Periodically measure insulation resistance

Monitor load conditions and temperature rise

Preventive Maintenance

Clean windings and core surfaces

Inspect for signs of corrosion or insulation degradation