封閉母線(xiàn)槽具有散熱好、阻抗低及載流量大等等優(yōu)勢，與電纜相比，在載流量相同的情況下，能節省銅材10-35%，能減少電能損耗15%以上。封閉母線(xiàn)槽很適宜交流電源，在給定的電壓數值下能維持住長(cháng)時(shí)段的運轉。一分鐘以?xún)鹊慕涣麟姞顟B(tài)下，母線(xiàn)槽不會(huì )被擊穿且不會(huì )帶有閃絡(luò )的狀態(tài)。它能承載著(zhù)的耐受電流、較短時(shí)段的峰值電流，都會(huì )符合規格。

Closed bus duct has advantages such as good heat dissipation, low impedance, and high current carrying capacity. Compared with cables, it can save copper materials by 10-35% and reduce electrical energy loss by more than 15% under the same current carrying capacity. Closed bus ducts are suitable for AC power sources and can maintain long-term operation at a given voltage value. Under the condition of alternating current within one minute, the bus duct will not be broken down and there will be no flashover. The withstand current it can carry and the peak current for a shorter period of time will meet the specifications.

1、封閉母線(xiàn)槽的使用壽命大約是電纜和分支電纜的2～3倍左右。我國香港、澳門(mén)及歐洲有些明確規定電纜使用壽命為12～15年。實(shí)際上母線(xiàn)槽的使用壽命則長(cháng)達30～50年。母線(xiàn)槽可分成空氣絕緣類(lèi)別、密集絕緣類(lèi)別。通常狀態(tài)下，空氣絕緣這樣的母線(xiàn)槽固有的構架很簡(jiǎn)易，密集絕緣母線(xiàn)槽帶有的散熱特性，電流等級很高。

1. The service life of enclosed bus ducts is approximately 2-3 times that of cables and branch cables. Hong Kong, Macau, and some European countries in China clearly stipulate that the service life of cables is 12-15 years. In fact, the service life of the bus duct is as long as 30-50 years. The bus duct can be divided into air insulation category and dense insulation category. Under normal conditions, the inherent structure of bus ducts with air insulation is very simple, and densely insulated bus ducts have high-quality heat dissipation characteristics and high current levels.

2、高層建筑布設的電氣豎井，封閉母線(xiàn)槽都配有某一插接口徑，布設這類(lèi)接頭應考量多重的人為干擾。然而，母線(xiàn)槽初始的容量很大，同時(shí)構架緊湊，在偏大負荷的態(tài)勢下也帶有優(yōu)勢。

2. The electrical shafts and enclosed bus ducts installed in high-rise buildings are equipped with a certain socket diameter, and the installation of such joints should consider multiple human interference factors. However, the initial capacity of the bus duct is large, and the structure is compact, which also has advantages in situations of heavy loads.

3、采用封閉母線(xiàn)槽載流能力穩定，避免了不必要的電能損耗。母線(xiàn)槽標準滿(mǎn)足規范規定的極限溫升值的電流(即是母線(xiàn)槽的額定電流)是很重要的。該電流能控制母線(xiàn)槽的載流能力。電纜的額定電流是以截面積來(lái)確定的。計算負荷不同，橋架內電纜根數不同，使用不同的電纜橋架，橋架內的溫度隨著(zhù)上述這些因數的不同而變化，電纜的載流能力亦隨之變化。

3. The use of enclosed bus ducts ensures stable current carrying capacity and avoids unnecessary energy loss. It is important for the bus duct standard to meet the maximum temperature rise current specified in the specifications (i.e. the rated current of the bus duct). This current can control the current carrying capacity of the bus duct. The rated current of a cable is determined by its cross-sectional area. The calculation load varies, and the number of cables inside the cable tray varies. When using different cable trays, the temperature inside the cable tray changes with the above factors, and the current carrying capacity of the cable also changes accordingly.

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