The LED display project is a huge system project. It not only requires comprehensive consideration in the production process, but also requires details in daily installation and use. The LED screen can only be used normally for a long time.
In daily life, we often ignore some important matters. At the least, the screen will not light up, and at the worst, the parts will be damaged, or even major accidents such as fire will be caused! Therefore, whether it is the LED screen manufacturer or the terminal service provider, strict training and guidance should be carried out for the relevant installation and users to ensure safety and avoid damage to the screen.
So, what should be paid attention to when installing outdoor LED display screens? Next, I will give you a detailed introduction!
Install steel structure
The design of steel structure should consider many factors such as wind load, waterproof, dustproof, lightning protection, and surrounding population density. At the same time, auxiliary equipment such as power distribution cabinets, air conditioners, axial fans, lighting, and maintenance facilities such as horseways and ladders should be placed in the steel structure. Therefore, when implementing, the entire outdoor screen steel structure should have design drawings that have passed the review of the government competent department to ensure the reliability and safety of the entire steel structure.
The erection of scaffolding is also an important link. Its design plan must be rigorously demonstrated. On site, it is also necessary to ensure that the construction is standardized and the inspection is timely to eliminate the safety hazards during the erection process.
Standardized electricity use
The construction site must adopt a three-level distribution system, a TN-S zero protection system, and a two-level leakage protection system. It is also necessary to avoid making the three-level distribution into a two-level distribution, the incorrect PE line lead position, the incorrect repeated grounding position and number of times, etc. during the construction process, and eliminate safety hazards as much as possible.
Waterproof and moisture-proof
Outdoor LED display screens are often exposed to the sun and rain, and the wind blows the dust cover. The working environment is harsh, and once the electronic equipment is wet or severely damp, it will cause short circuits and other faults, and even cause fires.
Therefore, the joints between the screen and the screen, and the screen and the building, must first be strictly waterproof and leakproof; secondly, the screen must have good drainage measures, and once water accumulates, it can be discharged smoothly. It is worth noting that the protection level (front/back) of the outdoor LED display screen is at least IP65/IP54, and cannot be lower than this protection level.
Ventilation and heat dissipation
When the outdoor LED display screen is working, it will generate a certain amount of heat. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly or even burn, resulting in abnormal screen body. Therefore, an axial fan (behind and above the screen body) or other ventilation equipment should be installed to discharge heat so that the internal temperature of the screen body is stable at -10℃～40℃.
In addition, the selection of industrial-grade integrated circuit chips with an operating temperature between -40℃～80℃ can effectively prevent the system from failing to start due to low temperature.
Use high-quality wire
The larger the area of the LED display screen, the greater the power consumption, and the higher the requirements for the power-on stability of the wire. Only when the wire meets the national standard requirements can its safety and stability be guaranteed.
Among the many wire products, there are 3 points that need to be emphasized: the wire core is a copper wire conductive carrier, the wire core cross-sectional area tolerance is within the standard range, and the insulation and flame retardancy of the rubber wrapped around the wire core should meet the national standards.
Lightning protection grounding
Outdoor LED display screens will also be attacked by strong electricity and strong magnetism caused by lightning, which requires that the LED body and shell must have good grounding measures, and the grounding resistance must be less than 3 ohms. In order to discharge large currents in time and reduce overvoltages on the equipment, lightning protection devices should usually be installed on the display screen and the building.
For the grounding of outdoor LED display screens, the grounding form should be considered according to the specific situation: when the display screen is independently set, a separate grounding system should be set up, and the grounding resistance should not be greater than 4 ohms; when the display screen is attached to the outer wall of the building, the display screen body and shell should be well grounded with the building, and the grounding resistance should not be greater than 1 ohm.
Choose a suitable distribution cabinet
LED outdoor display screens are generally powered by AC220V current, requiring the grid voltage fluctuation to be less than 10%, and providing good system grounding. For display screens with a power consumption of more than 10kW, a special distribution cabinet should be equipped. In order to prevent leakage fires, a fire-proof leakage switch should also be installed at the main switch of the power supply line. The controller monitoring interface in the power distribution cabinet can display the real-time temperature of the display screen: in the automatic state, when the temperature of the screen body exceeds 65 degrees, the monitoring screen will prompt that the temperature is too high, and the controller will sound an alarm, and the system will automatically cut off the power to prevent fire.
In addition, smoke detectors can be installed in the display screen according to actual conditions. When a fire occurs in the screen, there will be corresponding prompt information on the monitoring interface, and the power distribution system can be linked to automatically cut off the power.
Safety
Safety helmets, safety belts, and safety nets are the three magic weapons to reduce and mitigate safety construction accidents. At the construction site, the construction unit should require all personnel on site to wear safety helmets correctly. According to relevant data, the higher the safety education level of workers and the more perfect the safety education physique of the enterprise, the probability of safety accidents is much lower than that of enterprises where safety education is superficial.
In fact, as long as the relevant configuration of the display screen is not reduced in the pursuit of the maximum benefit of the project; the quality and safety management of the project site are not ignored in order to meet the project schedule; the wire configuration is not reduced in order to reduce the construction cost, the installation and use of outdoor LED display screens can be carried out in an orderly manner.
