Its working principle is that the transpiration and condensation of working fluid in the non-specific vacuum tube can conduct heat transfer. The chint ntk1 thermostat is an all-in-one temperature controller that integrates heating, constant temperature, and cooling functions. Hidden away in industrial settings or mounted discreetly on street poles, they quietly manage the flow of power to homes, businesses, and essential services. But there's a silent threat lurking inside these metal cabinets –. Part of the disturbances is due to im-posed external conditions such as over- and undervoltage, over- and underfrequency, harmonics, unba-lanced system voltages and supply interruptions, for example autoreclosing that occurs in the supplying network. Other possible causes of external disturbances. Distribution box is stored in a large number of electrical components or communication equipment, equipment for a long time in the process of work in addition to inevitably cause the distribution box internal temperature rise, will seriously affect the normal operation of equipment. To achieve this goal, a prototype constructed from expanded polystyrene is developed, incorporating an active ventilation system to ensure cold temperature.