Positive pressure explosion-proof control system is a safety system specifically designed to protect electrical equipment from explosive environments. Its working principle is to provide a continuous flow of clean air or inert gas (usually nitrogen) to the interior of electrical equipment, thereby maintaining the pressure inside the equipment slightly higher than the pressure of the external environment. The purpose of doing so is to prevent any possible combustible gases or dust from entering the interior of the equipment, thereby avoiding explosions caused by sparks generated inside the equipment.