Don't Be Afraid Of Lightning, There Are Methods To Select Lightning Arresters
As we all know, lightning is extremely destructive, with a voltage of millions of volts and an instantaneous current of hundreds of thousands of amperes. Most people are helpless in the face of lightning attacks, and they are not aware of lightning protection products, and have many problems in dealing with lightning attacks.
Experts remind that lightning will not only damage equipment and affect the service life of components, but also cause loss of stored signals or data, and in severe cases, cause casualties or fire accidents. Nowadays, lightning activities are becoming more and more frequent. In order to better ensure the safety of work and life, installing 132kv lightning arrester has become a necessary means to prevent lightning damage. If it is not implemented, the consequences are really unpredictable. So how to choose 132kv surge arrester?
First of all, we need to understand where 15 kv surge arrester is used? If you want 22 kv lightning arrester to play a good protective effect, you need to install the appropriate 220 kv lightning arrester in the right place, so 33 kv lighting arrester is very important in the choice.
1. Power supply 33 kv lightning arrester
According to statistics, about 80% of accidents in which lightning strikes damage electronic equipment are introduced by the power supply. Lightning can be input from the power line into the room. The electronic equipment in the room will be attacked by direct lightning and induction lightning, which will cause a devastating blow to the power supply system. Therefore, the lightning protection measures of the power supply system equipment should be strengthened.
When purchasing power supply 33kv lighting arrester, you should choose a lightning arrester with small residual pressure and fast reaction time. At the same time, you should choose the power supply 33kv lightning arrester price level according to the surge intensity of the lightning active area where the electronic equipment is located, the degree of exposure of the equipment to lightning surges, the degree of protection of the equipment, and the value.
Among them, the intermediate lightning arrester can be used on the main distribution cabinet in the building; the second-level lightning arrester is used in the branch distribution cabinet of the building; the third-level lightning arrester is used at the front end of important equipment, which can provide precise protection for the equipment. Therefore, different lightning arrester levels can be selected for protection according to different types of power supply equipment.
2. Signal lightning arrester
Signal lightning arresters are used in many occasions, such as telephone signals, network signals, video signals, analog signals, digital signals, control signals, combined signals, etc. When these signal lines are struck by lightning, they will induce overvoltages of thousands of volts, damaging microelectronic equipment connected to the lines, and invading other communication lines through equipment connections. This invasion spreads along the communication lines, involving a wide range of areas and causing great harm. If a signal lightning arrester is installed before, the energy generated by the induced lightning will be discharged to the ground, and these dangers will be eliminated to ensure the safety of communication equipment.
In the selection of signal lightning arresters, signal lightning arresters are installed in series on the line. It is necessary not only to consider whether the lightning arrester can protect the signal line from lightning, but also to consider the matching problem between the lightning arrester and the communication line. Therefore, rate matching, voltage level, interface type, insertion loss, etc. are all factors that need to be considered in the selection of signal lightning arresters.
Selection 1: Rate matching selection
The data transmission rate of different communication systems is different. The signal lightning arrester is installed on the signal line. The transmission rate it supports should not be less than the transmission rate of the communication system itself, otherwise it will cause communication interruption or increase the bit error rate, affecting the normal operation of the communication system.
When communication interruption or bit error rate increase occurs, the user can check whether the length of the communication line is too long. The number of power outages, connection quality, and whether the communication connector is tight may also cause the increase in bit error rate.
Selection 2: Voltage level selection
The voltage level selection of the signal lightning arrester should be determined based on the working voltage of the communication line data transmission. It is an important parameter for selecting the signal lightning arrester. The high working voltage of the lightning arrester must be greater than 1.2 times the working voltage of the communication line.
Selection 3: Interface type selection
The signal lightning arrester is installed on the line in series. In order to match the impedance and maintain a small contact resistance, the same type of interface as the communication line should be selected. For RJ and SD type interfaces, pay attention to the line pair matching, and for the coaxial cable interface, pay attention to the male and female matching.
Selection 4: Insertion loss
The signal lightning arrester is installed on the signal line. Due to the influence of its additional capacitance, there will be a certain insertion loss at high frequencies. When selecting a signal lightning arrester, its insertion loss should be less than the value specified in the relevant standards.
At present, lightning arresters have been widely used in the fields of electricity, electronics, communications, security, and home. Lightning arresters will eventually become an indispensable lightning protection tool for society to ensure the safety of life and property.
