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配电箱中母线的作用是什么



 母线指用高导电率的铜、铝质材料制成的,用以传输电能,具有汇集和分配电力的产品。电站或变电站输送电能用的总导线。在电力系统中,配电箱中的母线将配电装置中的各个载流分支回路连接在一起,起着汇集、分配和传送电能的作用。
 在配电箱中,母线采用铜排或者铝排,其电流密度大,电阻小,集肤效应小,无须降容使用。电降压小也就意味着能量损耗小,最终节约用用户的投资。而对电缆芯是多股细铜线,其根面积较同电流等级的母线要大。并且其“集肤效应”严重,减少了电流额定值,增加了电压降,容易发热。母线槽的金属封闭外壳能够保护母线免受机械损伤或动物伤害,提高配电箱的安全性。

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Bus bar is made of copper and aluminum materials with high conductivity, which is used to transmit electric energy and has the function of collecting and distributing electric power. A main conductor used in a power station or substation to transmit electrical energy. In the power system, the bus in the distribution box connects each current carrying branch circuit in the distribution device, which plays the role of collecting, distributing and transmitting electric energy.
In the distribution box, the bus bar adopts copper bar or aluminum bar, which has high current density, small resistance, small skin effect and no need to reduce the capacity. Small voltage drop also means small energy loss, and ultimately save the investment of users. For the cable core, the root area is larger than that of the busbar with the same current level. And its "skin effect" is serious, reducing the current rating, increasing the voltage drop, easy to heat. The metal enclosure of the bus duct can protect the bus from mechanical damage or animal injury, and improve the safety of the distribution box.