How many do you know about the seven fire hazards and countermeasures of LED display ? Here are the seven fire hazards and corresponding countermeasures for the LED display.
LED display light hazard wire
The quality of the wire on the market is uneven. Many wire rods are made of copper-clad aluminum. The outer surface looks like copper wire. Actually, it is aluminum alloy wire. This kind of wire is generally used for temporary wire and cannot be used for regular products. There are copper problems of copper wire, problems of insulation layer, and the problem of wire diameter (generally required to be equipped with 1.2 times or more of the maximum power of the display). If you neglect one of these problems, you will bury hidden dangers for later. A big disaster.
Countermeasures:
In most display applications, the larger the display per unit area of ​​the display, the greater the amount of electricity used, and the higher the stability of the wire. LED display manufacturers must use domestic famous brands and pass the national 3C compulsory certification of copper core wire when purchasing power cords. There are three requirements: the wire core is a copper wire conductive carrier, the wire core cross-sectional area tolerance is within the standard range value, the insulation of the rubber core of the wrapped wire core and the flame retardancy reach the standard, compared to the general copper-clad aluminum wire core, the wire Wires with a small core cross-sectional area and insufficient insulation rubber grade have a more stable electrical connection performance and are less prone to short-circuit conditions.
LED display power hazard
The power source purchases inferior raw materials, and no overvoltage protection causes 5V to instantaneously become a 7-10V high current burnout IC, and then the power cord terminal is inferior and poorly contacted, which may become a cause of fire hazard.
Countermeasures:
The UL-certified power supply products are the safest and safest choice when selecting the same type of products. The effective conversion rate ensures the safety and stability of the power supply load, and it can work normally even under the hot external environment.
PCB display fire hazard PCB
The material itself is inferior, the copper is thin, the design is unreasonable, and the process is poor, causing the copper wire to have burrs and other phenomena, which will cause short circuit of the circuit and become the root cause of fire hazards.
Countermeasures:
PCBs with multi-layer board design are selected. The wiring is strictly in accordance with IEC/EN/UL60950 standard, and the maximum copper thickness is 4OZ PCB. For PCB incoming inspection, a professional IQC team and a complete incoming inspection process are established to ensure zero burrs on each PCB board, effectively preventing potential safety hazards caused by short circuit of PCB board.
LED display fire hazard plastic kit
Some inferior plastic kits will be made of recycled materials, not resistant to UV, and no flame retardant. Long-term use may cause short-circuit due to rainwater infiltration.
Countermeasures:
The raw material used in the excellent quality kit is the PC+ glass fiber material with flame retardant function. It not only has the flame retardant function, but also can be deformed at high and low temperature and long-term use without cracking and cracking. The use of good glue can effectively block the rain from entering the outside environment and cause a short circuit to fire.
LED display protection material for fire hazards
If the outdoor display screen chooses aluminum-plastic composite panel to aging with high temperature and rain and cold heat shock, it will easily penetrate into the screen body during the relatively humid climate season, causing a short circuit of electronic components to cause fire.
Countermeasures:
In terms of the material of the external protective structure of the display screen, most of the display products with high fireproof rating on the market adopt fire-resistant aluminum-plastic composite board, which has excellent fire resistance, fire retardant and strong flame retardancy, and the oxygen aging performance of the core material is also very good. Strong, melting point temperature 135 ° C, decomposition temperature ≥ 300 ° C, environmental performance, low smoke and halogen free, in line with SGS, flame retardant B-S1, d0, t0, reference standard UL94, GB/8624-2006.
LED display cooling system
The LED display works at high temperatures, and the heat dissipation problem becomes the first problem to be solved. If the design of the cooling air duct is unreasonable, it is easy to cause dust to accumulate on the fan main shaft, the power supply and the main board, resulting in poor heat dissipation, short circuit of the electronic components, and the fan is stuck, which may cause a fire.
Countermeasures:
At the same time, the display fan will be equipped with exhaust fans and air conditioners to cool the inside of the screen. It is recommended to install 1P air conditioner every 8-10 squares to ensure that the temperature inside the screen is kept at a normal temperature. If the air conditioner or exhaust fan is not in place, the heat treatment will be uneven. It is easy to cause safety hazards inside the screen due to temperature increase.
Installation and maintenance of LED display fire hazard
In the event of a fire accident in the LED display screen, in addition to the quality problems of the product itself, more engineers are not operating in the process of pre-installation and post-maintenance. For example, during the construction process, the cable that is not up to standard is used, the wire is not compacted, the contact is poor, the heat is generated, the distribution box is unreasonable, etc., which are the safety hazards of the LED display in the future. The welding operation is not standardized. When using the open flame or smoking when installing and debugging the display, it will cause a fire on the spot.
Countermeasures:
During the installation process of the LED display screen, it must be installed, instructed and inspected by professionals to prevent it from happening; clean the flammable materials and combustible materials around the LED display to prevent the LED display from being fired due to the surrounding fire hazard; In terms of maintenance, the LED display is regularly inspected and inspected by professionals to avoid potential safety hazards caused by improper operation and untimely maintenance.
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