Several problems that need to be paid attention to when installing outdoor LED d

Several problems that need to be paid attention to when installing outdoor LED display


Steel structure outdoor LED display is generally installed in a large area, and most of the installation is in crowded places, the design of steel structure should consider the foundation, wind load, waterproof, dustproof, moisture and other factors. Generally speaking, outdoor LED display installation area is large, and most of the installation is in densely populated places, its steel structure design should be considered...
Steel structure outdoor LED display is generally installed in a large area, and most of the installation is in crowded places, the design of steel structure should consider the foundation, wind load, waterproof, dustproof, moisture and other factors.
Generally speaking, the outdoor LED display installation area is large, and most of the installation is in crowded places, the steel structure design should consider the foundation, wind load, waterproof, dustproof, moisture-proof, environmental temperature, lightning protection, surrounding population density and other factors. In a steel structure also need to install distribution box, air conditioning, axial flow fans, lighting and other auxiliary equipment, but also need to install the horse path, climbing ladder and other maintenance equipment. Therefore, from the date of implementation, the entire outdoor screen steel structure should be audited by the competent government departments, by the design drawings to ensure the firm safety of the entire steel structure.
Anti-humidity outdoor LED display device in the outdoors, often exposed to the rain, dust cover, poor working environment, electronic equipment damp or damp seriously, will cause short circuit and even fire, cause failure and even fire, resulting in losses; Therefore, the screen body and the screen body and building joints must be strictly waterproof and leakproof; Screen body to have good drainage measures, once the water smoothly discharged; Pay attention to water and moisture.
Wuhan LED outdoor display should be installed with ventilation and cooling devices, so that the internal temperature of the screen body is kept between -10℃ and 40℃. The axial fan on the back of the screen emits heat; Outdoor LED display will produce a certain amount of heat when working. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly or even be burned, so that the LED display system can not work properly.
The electronic components for lightning protection and grounding on outdoor LED screens are highly integrated, which requires higher sensitivity to interference resistance. Lightning strikes can harm exposure systems in a variety of ways, typically hitting the screen directly and then leaking to the ground through the grounding device. Mechanical, electrical and thermal damage of overcurrent during lightning strike. Solution is equipotential connection, is not poor grounding or metal shell, the metal shell of the cable, the display inside the metal frame and the grounding device welding firmly connected, in order to prevent due to induced high voltage or lightning grounding device object into the ground of high voltage transmission, cause overvoltage of internal insulation and cable core. Outdoor LED displays are also subject to strong electric and magnetic attacks caused by lightning strikes. In order to timely release the large current caused by lightning strikes, reduce the overvoltage on the equipment and limit the intrusion wave caused by lightning strikes. Usually lightning arresters should be installed on monitors and buildings.

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The grounding method of manufacturing LED should be considered according to the specific situation; If the display is set separately, a grounding system should be set separately, with a grounding resistance of no more than 4 ohms. When the display is attached to the wall of a building, the main body and shell of the display must have a good grounding relationship with the building and share the overall grounding with the building. The grounding resistance should not be greater than 1 ohm.
AC220V current is generally used for the power supply system of LED outdoor display, which requires that the voltage fluctuation of the power grid shall not exceed 10%, and excellent system grounding shall be provided. Special power distribution cabinets should be installed for displays with power supply exceeding 10kW. On-demand optional remote control or PLC control function of power distribution cabinets, with PLC control function more intelligent power distribution ark, on-demand optional LCD control device remote control in wuhan display screen making and switching, air conditioning, fan and other equipment can also be the environment outside ambient temperature inside the screen, screen brightness for real-time monitoring, and the corresponding alarm information. The general environmental conditions of outdoor display screen are poor, so it is recommended to use the distribution box controlled by programmable controller. Indoor display project has good environmental conditions and limited space, so it can be operated without programmable controller.
In order to prevent sudden leakage fire, leakage fire switch should also be installed at the main switch of the power supply entrance. The LCD control and monitoring interface in the power distribution cabinet can display the temperature inside the display in real time. When the screen is in automatic state and the temperature exceeds 65 degrees, the monitor screen will indicate that the temperature is too high. At the same time, the LCD controller will sound an alarm, and the system will automatically cut off the power supply to prevent fire. The smoke detector can be installed in the screen according to the actual situation. When there is a fire on the screen, there will be corresponding prompt information on the monitoring interface, and the power can be cut off automatically by combining with the distribution network.