For float glass, photovoltaic glass, and daily-use glass production lines, tin tank dry-type transformers, glass electric melting furnace transformers, glass furnace electric melting assist transformers, and magnetic voltage regulators can provide precise and stable power supply for furnace electric melting, electric melting assist, and tin tank heating under high temperature and high load conditions, ensuring uniform temperature of glass liquid, continuous and reliable production, and improving yield and energy consumption control level.