System: KCD3
l press down is open. According to the relevant national standards, o refers to the circuit is disconnected, I refers to the circuit is closed, and in the closed circuit in order to have current through, that is to say, I represents open, O represents closed. So by pressing the appliance switch in the direction of I, you will be able to turn the appliance on.
Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, electric power equipment, instruments, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD monitors, LED lamps and lanterns, communication equipment, audio-visual products, security monitoring, LED strip lights, computer chassis, digital products and instruments and other fields.
Switching power supply is moving towards mass production and miniaturization. Switching power supply will gradually replace the transformer in the life of all applications, the application of low-power miniature switching power supply to be the first to reflect in the digital display meter, smart meter, cell phone charger and so on. At this stage, the country is vigorously promoting the construction of smart grid, the requirements of the power meter greatly increased, switching power supply will gradually replace the transformer in the power meter above the application.