Siemens, Schneider, ABB, Chint, Delixi, Shanghai People, the better ones: Siemens, ABB, Schneider, the prices are also relatively high, these are the more classic products of established joint ventures on the market now. Features are: complete solutions; very flexible configuration; high density; functional units and distribution busbars are connected through a patented double-clamp system to reduce wear on the distribution busbar; functional units can be replaced when the vertical busbar is live; It has high short-circuit capacity; the horizontal busbar is connected with a dedicated fish-shaped bar, which is very convenient for on-site installation and upgrade; it comes with a base suitable for on-site transportation, which is very convenient for transportation.