Bus bridge is a kind of connection mode, i.e. bridge connection. The main connection connecting two power supply leads and two transformers is connected by the cross circuit breaker bcd. Compared with segmented single bus connection, it simplifies and reduces the number of circuit breakers. According to the position of the bridge breaker, it can be divided into internal connection bridge and external connection bridge.

母线桥主体指采用架空跨接的矩形母排，母线桥可以是封闭的，也可以是开放的。封闭式母线桥用金属板做成保护箱体把矩形母排装于里面，这也是我们常见的方式，开放式的一般较少，因此大部分概念含有外部箱体，但不准确，箱体仅仅是一种简单制作的矩形支撑保护体，没有太多作用。

The main body of bus bridge refers to the rectangular bus bar with overhead spanning. Bus bridge can be closed or open. The enclosed bus bridge uses metal plate to make protective box and install rectangular busbar in it. This is also our common way. The open type is generally less. Therefore, most concepts contain external box, but it is not accurate. The box is only a simple rectangular supporting protective body, which has little effect.

对于母线槽，则可以说是母线桥的升级产品，通常又叫封闭母线槽（简称母线槽）。母线槽结构相对母线桥来说要复杂点，有完善的结构组成，体积小，内部有绝缘附件等，箱体是不可或缺的组件。

For busbar, it can be said that it is an upgrade product of busbar bridge. It is also called closed busbar (Busbar). Bus-bar slot structure is more complex than bus-bar bridge. It has perfect structure, small size and internal insulation accessories. The box is an indispensable component.

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