LED display more than the size of the area must be 380v
General LED screen to reach more than 20 square meters will use more than two power lines, and then some will use three-phase electricity. At the same time and time-sharing power system with the use, so as not to impact on the power grid. The maximum power can take 80 percent of the capacity to leave a margin of 20 percent. Also pay attention to the choice of cable, and lightning protection measures.
LED display itself only need low-voltage DC power supply, whether it is 380V or 220V need to go through the buck and rectifier, which is the screen does not matter. Whether it is to use 380V or 220V depends entirely on the load balance of the power grid considerations, which depends not only on the size of the display, but also on the local grid capacity. In general, LED is weak devices, even if the display area and then large, the total power is also less than where to go, so you can use 220V single-phase power supply, but the power supply cable cross-sectional area to be larger, but the power circuit Much simpler.
I installed the general are 380 to have some small screen with 220 plugs
LED display itself only need low-voltage DC power supply, whether it is 380V or 220V need to go through the buck and rectifier, which is the screen does not matter. Whether it is to use 380V or 220V depends entirely on the load balance of the power grid considerations, which depends not only on the size of the display, but also on the local grid capacity. In general, LED is weak devices, even if the display area and then large, the total power is also less than where to go, so you can use 220V single-phase power supply, but the power supply cable cross-sectional area to be larger, but the power circuit Much simpler.
