Table of Contents
1. What is a Dry Type Transformer? Structure and Operating Principles
2. Advantages and Disadvantages of Dry Type Transformers
Performance Characteristics of Dry-Type Transformers
1. High Safety
Dry-type transformers utilize non-flammable resin that is inherently non-combustible, flame-retardant, and incapable of explosion or releasing toxic gases. They pose no risks to the environment, surrounding equipment, or human health. These transformers exhibit high resistance to humidity, dust, and pollution, with no risk of partial discharge during operation and zero possibility of insulation cracking over time.
2. High Reliability
Both high-voltage and low-voltage windings are insulated with NOMEX® material and undergo multiple impregnations with H-class (180°C) solvent-free varnish using VPI (Vacuum Pressure Impregnation) equipment, followed by high-temperature baking curing. The transformer is rated for H-class thermal endurance (180°C), while its primary insulation material (NOMEX®) is rated for C-class (220°C), ensuring superior overload capacity and excellent short-circuit withstand capability. Under well-ventilated conditions, the transformer permits 20% overload operation.
3. Energy Efficiency & Environmental Friendliness
At the end of its service life, the transformer’s steel and iron components are easily recyclable. All NOMEX® paper insulation materials burn without releasing toxic substances, while other insulating materials are biodegradable and non-polluting. The transformer features low energy losses for enhanced efficiency, low operational noise, and flexible design adaptability to diverse application needs.