The China RFID and Internet of Things 2009 Development Report released in Tianjin on the 6th stated that China's Internet of Things industrial chain has initially taken shape, and the Internet of Things application has gradually advanced. Statistics show that in 2009, China's radio frequency identification technology (RFID) market size reached 8.51 billion yuan, a year-on-year increase of 29.3%, ranking third in the world, second only to the United Kingdom and the United States.
Zhang Qi, president of the China Information Industry Chamber of Commerce and chairman of the China RFID Industry Alliance, said that the Internet of Things connection range is much larger than the Internet. Equipment) and an incomparably huge database of hundreds of millions of people, collecting and storing massive physical and virtual information, through analysis, processing and decision-making, to complete the intelligent evolution from information to knowledge, to control and command, to achieve the ability to handle and solve problems .
Control cable is a kind of cable. It is used for control and monitoring circuits and protection circuits with AC rated voltage of 450V/750V and below. Shielded control cables are widely used in power plants and power stations due to their good shielding performance. They are intended to be laid indoors, in cable trenches, in pipelines, directly buried, in shafts and other fixed places that can withstand greater mechanical tension.
Feature
1. DC rated current Uo/U is 450/750V2. The maximum allowable long-term operating temperature of the cable electrical conductor is 70 ℃.
3 The working temperature during cable laying shall not be lower than 0 ℃. If the natural environment temperature is lower than 0 ℃, the cable shall be heated.
4 The strongly recommended allowable bending radius of cable is below:
The unarmoured cable shall not be less than 6 times of the cable diameter;
Armored cable or copper foil shielded cable shall not be less than 12 times of cable diameter;
The shielded Flexible Cable shall not be less than 6 times of the cable diameter.
5 Productive cable model 2-61 cores
6 Control cables are generally laid in rooms, cable trenches, pipelines and other fixed sites.
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