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配電系統中如何選擇匯流排和電纜

    20世紀90年代以前低壓配電系統中一直由電纜擔負著輸配電的重要角色。 但90年代以來,匯流排系統逐漸被引進和開發,並迅速在建築工程中得到廣泛應用。 它與傳統輸電器材相比有著其獨特的性能優勢,比如載流量大、過載能力強、分接方便、散熱性好以及維護方便等。

    Before the 1990s, cables played an important role in the low-voltage distribution system. But since the 1990s, the busbar slot system has been gradually introduced and developed, and has quickly been widely used in construction engineering. Compared with traditional transmission equipment, it has its unique performance advantages, such as large carrying capacity, strong overload capacity, convenient separation, good heat dissipation and convenient maintenance.

  匯流排供電系統通常是主幹線從配電中心引出以散射狀靈活供電,而電纜供電則受分接難度大、載流量小、難以分散控制等因素限制,通常是“點對點”供電,特別是在高層建築供電系統中,匯流排相比電纜的優越性尤為突出。 傳統電纜供電方式,每個樓層都需要單獨放線,電纜根數眾多。 這樣的密集敷設方式,散熱性差、佔用空間大、事故檢查難、維修難度大。 而匯流排供電只要使用單一的中心匯流排系統,在每個樓層設置相應容量的插接箱進行分流,即可達到供電目的。 這種方式使得分接異常靈活,而且每個分支都有插接箱對分流變容處的保護。 因此,採用匯流排更加安全、更加簡單、更加可靠。

    The bus trough power supply system is usually the main line from the distribution center to scattered flexible power supply, while the cable power supply is limited by factors such as difficult separation, small load capacity, and difficult dispersion control. It is usually "point to point" power supply, especially in the power supply system of high-rise buildings, the superiority of the bus trough is particularly prominent compared with the cable. Traditional cable power supply mode, each floor needs to set out separately, the number of cables. Such a intensive laying method, poor heat dissipation, large space, difficult accident inspection, difficult maintenance. As long as the single central bus slot power supply system is used, and the corresponding capacity plug box is set in each floor for distribution, the power supply purpose can be achieved. This way makes the split extremely flexible, and each branch has the plug box to protect the shunt transformer. Therefore, using the bus groove is safer, simpler and more reliable.

  匯流排節約空間,而電纜需要很大的空間。 匯流排可在離設備最近的位置進行控制,而電纜必須在配電室控制。 匯流排配有標準的安裝支架,無需其他支撐; 電纜必須用單獨的橋架或管道進行敷設。 匯流排壽命可達50年,並可重複使用。 而電纜較短,不可以重複使用。 匯流排的分介面可增加分接迴路,而電纜必須在配電室開始敷設。 安裝匯流排的保險費用比較低,而電纜相對較高。  

    The bus bar saves space, while the cable needs a lot of space. The bus groove can be controlled in the position nearest to the equipment, while the cable must be controlled in the distribution room. The bus is provided with standard mounting supports without additional support; cables must be laid with separate bridges or piping. The bus groove can last up to 50 years and is reusable. The cable is short and can not be reused. The branch interface of the bus groove can increase the tap loop, and the cable must be laid in the distribution room. The insurance cost of installing the bus is lower, while the cable is relatively high.