What protection should be done when installing outdoor advertising displays?
In the field of outdoor advertising, outdoor advertising display screen has a unique advantage, it is one of the main forms of advertising in the city, has a fairly strong targeted and attention, is an important part of the layout of the modern urban environment construction. However, outdoor advertising display screen as carrying LED screen, in the installation, must do a good job of related protection work, in order to better ensure its safety. Then you knowOutdoor Advertising DisplayWhat protection should be done when installing? The following Vishay Technology editorial for your introduction:
Outdoor advertising displays should be installed with the following protection:
1、Regulate the use of electricity
According to the temporary power code (JGJ46-2005), the construction site of outdoor advertising display must use three-level power distribution system, must use TN-S zero protection system, must use two-level leakage protection system. Should avoid the construction process will be three-stage power distribution into two-stage power distribution, PE line lead position is not right, repeated grounding position and the number of times is not right for the safety of the construction of the hidden danger of the practice.
2、Waterproof and moisture-proof
Outdoor advertising display screen is installed in the outdoor, often sun and rain, wind and dust cover, the working environment is harsh, electronic equipment is wet or serious moisture will cause short-circuit or even fire, triggering failures or even fire, resulting in losses. Therefore, the screen body of outdoor advertising display and the combination of the screen body and the building must be strictly waterproof and leak-proof. At the same time, the screen body should have good drainage measures, once the water can be discharged smoothly; pay attention to waterproof, moisture. It is worth noting that the outdoor advertising display protection level (front/back) can not be lower than IP65/IP54 protection level.
3、Ventilation and heat dissipation
Outdoor advertising displays should be installed with ventilation equipment to cool down the internal temperature of the screen body at -10℃ to 40℃. Install an axial fan behind and above the screen to discharge the heat. Outdoor advertising display screen work itself to produce a certain amount of heat, if the ambient temperature is too high and poor heat dissipation, integrated circuits may not work properly, or even burned, so that the LED display system can not work properly. Selection of operating temperature between -40 ℃ ~ 80 ℃ industrial-grade integrated circuit chip, to prevent the winter temperature is too low so that the big screen system can not start.
4. Lightning protection and grounding
Outdoor advertising display screen to do a good job of lightning protection, LED body and shell should have good grounding measures, and grounding resistance is less than 3 ohms. Outdoor advertising display in the electronic components of high integration, its sensitivity to anti-interference requirements are also increasingly high. Lightning can jeopardize the display system in various ways, in general, it may directly hit the screen body and then drain into the ground through the grounding device.
In the lightning current through the place caused by mechanical, electrical and thermal damage. The solution is equipotential connection, that is not grounded or not well grounded metal casing, the metal skin of the cable, the display of the metal frame and the grounding device reliable welding connection, to prevent these objects due to the induction of high-voltage or grounding device on the lightning into the ground caused by the transfer of high potential on the internal insulation of the equipment, the cable core line of the over-voltage counterattack. Outdoor advertising display will also be caused by lightning strong electric and magnetic attacks, in order to make the lightning caused by large currents can be discharged in a timely manner to reduce the voltage appearing on the equipment to limit the lightning intrusion wave. Usually should be installed in the display and buildings on the lightning device.
In summary, is the outdoor advertising display screen installation need to do some protection work. Outdoor advertising display screen as a bearing LED screen steel structure installation to ensure its firmness, in order to achieve the role of wind and earthquake resistance. Therefore, in the installation, the whole outdoor screen steel structure should be through the government authorities to review the qualified design drawings to ensure that the whole steel structure is reliable and safe.
