With the rapid development of the security industry, in recent years, the best terminal display equipment in the security industry-LCD splicing screens have developed very rapidly; with the continuous development and innovation of LCD splicing manufacturers, both in technology and product performance, LCD splicing screens Great breakthroughs have been made, and the technology has been constantly innovating. The application areas of LCD splicing screens are also expanding. At present, it has been involved in various industries such as entertainment, security and broadcasting. Although the graphics of the LCD splicing screen can usually be seen by your side, in fact, the LCD splicing screen is a well-designed electronic product. The requirements of the installation environment are also very strict. The following Hualinuo will analyze the power supply requirements of the LCD splicing screen for the installation environment.
LCD splicing screen
The LCD splicing system power supply has strict requirements on the quality of the AC power supply, the voltage and frequency of the AC power supply, the sine of the power supply waveform, the symmetry, continuity, and reliability of the three-phase power supply. , Stable and anti-interference power supply. All indicators are required to remain within the allowable deviation range. The power supply and distribution of the computer room should meet the requirements of GB/T2778-2000 "General Specification for Electronic Computers". The power supply frequency of the power supply and distribution system is 50 Hz, the voltage is 220V, and the single-phase is a single-phase three-wire system.
It is recommended to add an appropriate amount of AC uninterruptible power supply system UPS at the front of the splicing system power distribution equipment. In the case that UPS cannot be provided, a stable power supply of 22V50HZ must be provided for the splicing system, and the required power is greater than 1.5 times of the equipment.
The power distribution cabinet in the computer room should use an automatic switch and be connected to the fire fighting system. When a serious accident or fire occurs in the computer room, the manager can immediately cut off all power (the LCD splicing system cannot be switched on and off continuously. If the power is unexpectedly turned off, you need to find out the cause of the power failure and turn it on. It is recommended that the splicing screen larger than 2X2 use Hualinuo power supply The adapter allows the screens to be turned on one by one to improve the stability of the system and reduce the power that affects the system and the large screen.
The power cord should meet the requirements of "Building Lightning Protection Design Code", and take over-voltage protection measures (short-circuit, leakage, under-voltage, over-voltage, lightning protection and other safety protection measures). .
At the same time, the grounding resistance of the grounding system should not be greater than 2Ω. The equipotential measurement of the grounding system of multiple equipment should be connected to the same grounding coil through a copper wire template. In the wiring structure, the potential of the neutral point to the ground should be reduced as much as possible.
LCD splicing screen
The power load of the entire splicing system is 6400W (for example, 55 inches 4X5) (calculated based on 310W of each display unit and 200W of other peripherals). Consider the instantaneous high voltage at startup (based on 1.5 times the rated power). The power load of the LCD splicing system is about 10KW. If you use UPS, it is recommended to use more than 10KVA.
