母線槽應該是金屬封閉的，符合IEC62271-200標準。母線槽的金屬外殼與開關設備的金屬外殼一樣，具有多種功能。下面山東電纜橋架廠家為您分析一番：

The bus duct should be metal enclosed and comply with IEC62271-200 standard. The metal casing of the bus duct, like the metal casing of the switchgear, has multiple functions. The following cable tray manufacturer will analyze for you:

它保護人員免受接觸帶電導體的危險。

It protects personnel from the danger of contact with live conductors.

它為導體及其絕緣系統提供機械支撐。

It provides mechanical support for conductors and their insulation systems.

它保護導體免受機械損壞和環境破壞。

It protects conductors from mechanical damage and environmental damage.

在談論金屬外殼時，我們想到的材料是鋼——普通的日常冷軋碳鋼。然而，鋼作為外殼材料有一些缺點。重要的是，它是磁性的，導體周圍的磁場會在外殼中感應出循環電流。這些電流有幾個不良影響。當它們流過鋼的阻力時，它們代表能量損耗。反過來，這會升高外殼的溫度，降低散發母線中產生的熱量的效率，使整個母線管道運行得更熱。

When discussing metal shells, the first material we think of is steel - ordinary daily cold-rolled carbon steel. However, steel as a shell material has some drawbacks. Importantly, it is magnetic, and the magnetic field around the conductor induces a circulating current in the casing. These currents have several adverse effects. When they flow through the resistance of steel, they represent energy loss. Conversely, this will increase the temperature of the casing, reduce the efficiency of dissipating heat generated in the busbar, and make the entire busbar duct run hotter.

這有效地降低了母線槽的連續電流額定值，因為連續電流額定值由導體和外殼的溫升決定。

This effectively reduces the continuous current rating of the bus duct, as the continuous current rating is determined by the temperature rise of the conductor and enclosure.

減少這些磁效應的常用方法是少用非磁性材料（通常是鋁）制作母線管道外殼的一側。通常的做法是制作額定電流超過1200A的鋁制母線槽頂蓋。在某些非常高的額定值下，整個母線槽外殼可能由鋁制成。

A common method to reduce these magnetic effects is to make at least one side of the busbar duct casing using non-magnetic materials (usually aluminum). The usual practice is to make an aluminum busbar duct cover with a rated current exceeding 1200A. At certain very high ratings, the entire bus duct casing may be made of aluminum.

鋼的另一個缺點是，即使在鍍鋅鋼上涂上良好的油漆，它在某些惡劣環境中也可能無法承受。經常將鍍鋅鋼用于所有戶外總線管道外殼。在較小程度上，鋁也可能存在環境問題。如果鋼不適合，而鋁適合，則參考全鋁母線槽外殼。

Another disadvantage of steel is that even if good paint is applied to galvanized steel, it may not be able to withstand certain harsh environments. Galvanized steel is often used for all outdoor bus duct enclosures. To a lesser extent, aluminum may also have environmental issues. If steel is not suitable and aluminum is suitable, then refer to the full aluminum bus duct casing.

但是，如果鍍鋅碳鋼和鋁都不適合該環境，則第三種選擇是將母線槽外殼制成不銹鋼，它可以很好地承受惡劣的環境并且也是無磁性的。使用不銹鋼的缺點是成本高。基本原材料比碳鋼或鋁貴得多，制造它需要付出更大的努力。如果情況需要，將為母線槽提供不銹鋼外殼，并提供適當的。由于上漲，除非確實需要材料，否則不應指定不銹鋼母線槽外殼。

However, if both galvanized carbon steel and aluminum are not suitable for this environment, the third option is to make the bus duct casing stainless steel, which can withstand harsh environments well and is also non magnetic. The disadvantage of using stainless steel is its high cost. The basic raw materials are much more expensive than carbon steel or aluminum, and manufacturing them requires greater effort. If the situation requires, stainless steel casing will be provided for the bus duct and an appropriate price will be provided. Due to price increases, stainless steel bus duct enclosures should not be specified unless materials are indeed required.

對于4000A的母線橋，使用不銹鋼外殼是必須的，因為非導磁材料由母線因渦流引起的發熱實在太大，損耗巨大，從而造成溫升超標，而采用不銹鋼材質則可降低溫升，輕松的通過溫升試驗。更多相關內容就來我們網站http://m.888hv.cn咨詢！

For the 4000A bus bridge, using a stainless steel shell is necessary because the non magnetic material causes too much heat and huge losses due to eddy currents in the bus, resulting in excessive temperature rise. However, using stainless steel material can reduce the temperature rise and easily pass the temperature rise test. For more related content, come to our website http://m.888hv.cn consulting service