The main so Popular of dry-type transformers are low losses, low noise, excellent fire resistance, no flammable resins, non-toxic gases, nonflammable, self-extinguishing, low pollution, good insulation, and no maintenance. No partial discharge, strong lightning shock resistance, high mechanical strength, high temperature resistance, short circuit resistance, moisture resistance, and can work under high humidity conditions. No partial discharge, strong lightning shock resistance, high mechanical strength, high temperature resistance, short circuit resistance, moisture resistance, and can work under high humidity conditions.