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.

母線橋主體指采用架空跨接的矩形母排，母線橋可以是封閉的，也可以是開放的。封閉式母線橋用金屬板做成保護箱體把矩形母排裝于里面，這也是我們常見的方式，開放式的一般較少，因此大部分概念含有外部箱體，但不準確，箱體僅僅是一種簡單制作的矩形支撐保護體，沒有太多作用。

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.

對于母線槽，則可以說是母線橋的升級產(chǎn)品，通常又叫封閉母線槽（簡稱母線槽）。母線槽結構相對母線橋來說要復雜點，有完善的結構組成，體積小，內(nèi)部有絕緣附件等，箱體是不可或缺的組件。

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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