1. Basic Structure

• Windings: High and low voltage windings are usually wound with copper strips (foils) and cast with epoxy resin in a vacuum environment. After curing, they form a high-strength glass fiber reinforced plastic structure. Some high-voltage windings may also use copper wires.
• Iron Core: Made of high-quality cold-rolled silicon steel sheets, often with a 45° fully mitred joint structure. The surface is coated with resin paint for moisture and corrosion resistance.
• Heat Dissipation: Longitudinal ventilation ducts are arranged inside the windings, and fans can be configured for forced air cooling (AF) to improve overload capacity.

2. Core Technologies

• Vacuum Casting Process: Epoxy resin is cast in a vacuum environment, which can effectively eliminate bubbles, ensure a dense insulation layer, and achieve a low partial discharge value.
• Thin Insulation Technology: The thickness of the insulation layer is usually 1-3mm, which effectively solves the cracking problem that may occur with thick insulation technology and has excellent crack resistance.

3. Core Performances

• Safety & Environmental Protection: Epoxy resin has flame-retardant and self-extinguishing properties, non-combustible, explosion-proof, and does not pollute the environment.
• Excellent Electrical Performance: Strong lightning impulse resistance and high short-circuit withstand capacity.
• Strong Environmental Adaptability: The windings are moisture-proof and dust-proof, capable of operating in harsh environments with high humidity, and basically maintenance-free.
• Energy Saving & Economy: Low loss, obvious energy-saving effect, and economical operation.

4. Typical Applications

5. Technical Parameters

• Capacity Range: Up to approximately 10,000 kVA
• Voltage Level: Usually covering 10kV, 35kV and below
• Insulation Class: Generally Class F (155℃) or Class H (180℃) with high temperature resistance