Today's society is an era of rapid development of information technology. Microelectronic devices are widely used in various communications equipment, including computer data communications, terminal equipment, program-controlled telephones, etc. Temperature, flow rate, pressure sensors, and secondary instrumentation of industrial monitoring systems are all adopted. Computers deal with various signals. At present, computer communication signals or information processing are widely used in the form of networks, which can be divided into local area networks, wide area networks, etc. These networks require long network transmission lines, and the monitoring systems have a long distance between the signal transmission distance. In general, there are tens of meters or hundreds of meters. Because of the long transmission distance and the long transmission line, the probability of experiencing a lightning strike is greatly increased. In addition, the operating voltage of hardware devices is low, and the ability to resist lightning is weak. In order to ensure various kinds of electrons The safe operation of equipment, installation of electronic arresters is very necessary.
Product selection and installation
1 The operating voltage connection mode and characteristic impedance of the signal arrester should be matched with the protected port of the network
2 The signal lightning arrester transmission rate should be higher than the network's protected port transmission rate
3 The signal insertion arrester insertion loss should meet the reserved range of the system design total insertion loss allowable value
4 The nominal discharge current of the signal arrester should be greater than the maximum surge current expected at the installation site
5 The voltage limit of the signal arrester should not exceed the withstand voltage rating of the protection object
6 Connect the lightning arrestor to the protected signal line and the output of the arrester to the protected device.
The general building lightning protection network can only protect itself from direct lightning damage, but the lightning will destroy the electronic equipment through the following forms and ways:
One is that lightning strikes the power input line and then enters and damages the device. Although all kinds of protection gaps and power surge arresters such as isolation transformers are installed on the power transmission line, this can only limit the line-to-ground voltage to less than 6,000 volts (IEEE C62.41) when the lightning shock wave intrudes through the transmission line. The line cannot be controlled. Modern mine engineering technology has entered a new era. Due to the constant advancement of communications technology, comprehensive lightning protection engineering technologies and their applications will continue to develop. The lightning protection facilities should be regularly tested to assess whether the lightning protection facilities meet the requirements, be responsible for lightning protection and safety work, establish various lightning protection and safety operations, establish regular inspections of various lightning protection facilities, check after thunderstorms, and daily maintenance.
In the design and construction of lightning protection facilities, consideration should be given to factors such as the characteristics of geology, soil, meteorology, environment, protected objects, and the law of thunder and lightning activity, and be designed and constructed with safety, reliability, advanced technology, and economical and reasonable design. Lightning protection equipment, devices, and equipment that meet the standards for technology and quality shall be used to avoid the use of non-standard lightning protection products and devices. The newly added construction and newly added installation equipment shall simultaneously redesign and construct the lightning protection system. The weak current equipment shall be protected against overvoltage (overvoltage inside the lightning or power supply system). The measures include: equipotential bonding, shielding, and protection isolation. Reasonable wiring and installation of overvoltage protectors and other measures, lightning protection is a comprehensive task, especially weak lightning protection of lightning protection equipment is not enough attention, and often caused by the damage to the equipment, so in the improvement of weak equipment outside While protecting, we must strengthen the internal protection of weak electrical equipment.
Product selection and installation
1 The operating voltage connection mode and characteristic impedance of the signal arrester should be matched with the protected port of the network
2 The signal lightning arrester transmission rate should be higher than the network's protected port transmission rate
3 The signal insertion arrester insertion loss should meet the reserved range of the system design total insertion loss allowable value
4 The nominal discharge current of the signal arrester should be greater than the maximum surge current expected at the installation site
5 The voltage limit of the signal arrester should not exceed the withstand voltage rating of the protection object
6 Connect the lightning arrestor to the protected signal line and the output of the arrester to the protected device.
The general building lightning protection network can only protect itself from direct lightning damage, but the lightning will destroy the electronic equipment through the following forms and ways:
One is that lightning strikes the power input line and then enters and damages the device. Although all kinds of protection gaps and power surge arresters such as isolation transformers are installed on the power transmission line, this can only limit the line-to-ground voltage to less than 6,000 volts (IEEE C62.41) when the lightning shock wave intrudes through the transmission line. The line cannot be controlled. Modern mine engineering technology has entered a new era. Due to the constant advancement of communications technology, comprehensive lightning protection engineering technologies and their applications will continue to develop. The lightning protection facilities should be regularly tested to assess whether the lightning protection facilities meet the requirements, be responsible for lightning protection and safety work, establish various lightning protection and safety operations, establish regular inspections of various lightning protection facilities, check after thunderstorms, and daily maintenance.
In the design and construction of lightning protection facilities, consideration should be given to factors such as the characteristics of geology, soil, meteorology, environment, protected objects, and the law of thunder and lightning activity, and be designed and constructed with safety, reliability, advanced technology, and economical and reasonable design. Lightning protection equipment, devices, and equipment that meet the standards for technology and quality shall be used to avoid the use of non-standard lightning protection products and devices. The newly added construction and newly added installation equipment shall simultaneously redesign and construct the lightning protection system. The weak current equipment shall be protected against overvoltage (overvoltage inside the lightning or power supply system). The measures include: equipotential bonding, shielding, and protection isolation. Reasonable wiring and installation of overvoltage protectors and other measures, lightning protection is a comprehensive task, especially weak lightning protection of lightning protection equipment is not enough attention, and often caused by the damage to the equipment, so in the improvement of weak equipment outside While protecting, we must strengthen the internal protection of weak electrical equipment.
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