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The earliest electrical appliances were knife switches used by 18th century physicists to study electrical and magnetic phenomena. In the late 19th century, due to the application of electric energy to the society, various electrical appliances were also introduced. However, the electrical capacity of this period is small and it is manual. The protection of the circuit mainly uses fuses (commonly known as fuses). Since the 20th century, the application of electric energy has shown great superiority in social production and human life, and it has rapidly spread, and electrical appliances that adapt to various requirements have also emerged. Large ones have two or three-story ultra-high voltage circuit breakers used in power systems, and small ones have ordinary household switches.
In the past 100 years, the general trend of electrical development has been an increase in capacity, an increase in transmission voltage, and an increase in automation. For example, switching electrical appliances used air or transformer oil as an arc extinguishing medium in the early 20th century. After multi-oil, oil-less, and compressed air, they developed into an open circuit using vacuum as an arc extinguishing medium and sulfur hexafluoride as an arc extinguishing medium. The breaking capacity of the device is from about 20 to 30 kiloamperes in the early period to 80 to 100 kiloamperes in the middle and late 1980s, and the working voltage is increased to 765 kilovolts to 1150 kilovolts.
For example, in the 1960s, transistor time relays, proximity switches, and thyristor switches appeared. After the 1970s, there were electromechanical integrated intelligent appliances and sulfur hexafluoride fully enclosed combined electrical appliances. The emergence of these electrical appliances is interdependent and mutually reinforcing with new electrical materials, new electrical manufacturing technologies and new processes, and has adapted to the requirements of the continuous development of the entire power industry and social electrification.
Sub-controller of LED applying system. The DMX-S8 receives the pixel data frame sent by the RTP-S1500 Main Controller. According to the address set by itself, the corresponding data in the pixel frame is taken out. After the format is adjusted, the data is sent out from the controlling port at a specific timing sequence to control the LED light to change color. Set up 2 RJ45 network interfaces; When using unshielded Twisted Pair, the distance of transmission from the main controller to the sub-controller and sub-controller to sub-controller is more than 100 meters; Connect to the switch for network to extend the distance of transmission; Single controller can connect up to 16 computer; Automatically identify its position in the system; Set up 8 DMX512 controlling ports with auto-addressing function. The number of single-port controlling pixels is 170 full-color pixels, 512 monochrome pixels, and the type of connector is the pluggable terminal; Each port conduct optical isolation protecting to ensure the stability of the entire controlling system;
Sub-controller,Sub Controller,DMX 512 Sub Controller,Auto-addressing Sub Controller,LED Lighting System Sub Controller
StrongLED Lighting Systems (Suzhou) Co., Ltd. , https://www.strongledcn.com