面对庞大的负荷所需的强大电流必须选用安全可靠的输变电设备，母线槽将是理想的选择，下面来讲讲母线槽系统原理以及选型安装考虑的相关内容。

In the face of the strong current required by huge load, safe and reliable power transmission and transformation equipment must be selected, and bus duct will be the ideal choice. Next, let's talk about the principle of bus duct system and the relevant contents considered in selection and installation.

母线槽系统一般多应用在变压器和配电柜之间的连接以及由配电中心(配电盘、柜)开始至负载呈树干式布线方式的供电系统。系统电流等级通常为250～6300A，额定电压400～1000V，防护等级IP40～IP68，根据导体数量配置有三相四线制和三相五线制(增设独立PE排，另有部分厂家提供铝合金外壳作整体接地PE的形式)。

Bus duct system is generally used in the connection between transformer and distribution cabinet and the power supply system with tree dry wiring from the distribution center (distribution panel and cabinet) to the load. The current grade of the system is usually 250 ~ 6300A, the rated voltage is 400 ~ 1000V, and the protection grade is IP40 ~ IP68. According to the number of conductors, three-phase four wire system and three-phase five wire system are configured (independent PE bar is added, and some manufacturers provide aluminum alloy shell as the form of integral grounding PE).

在母线槽系统中一般由以下几个单元组成：馈电式母线(不带插口)或插接式母线(带插口)直线段单元;与变压器，配电柜等设备接口的进(出)线单元;换向单元有L形单元，T型单元，Z型单元;膨胀单元有膨胀节母线单元;插接单元有插接箱单元。所有单元通常均由母线槽制造商进行标准设计，也可以根据工程需要进行现场测量后采取非标设计，以满足用户及安装需要。

The bus duct system is generally composed of the following units: feeder bus (without socket) or plug-in bus (with socket) linear section unit; Incoming (outgoing) line units that interface with transformers, distribution cabinets and other equipment; The reversing unit includes L-shaped unit, T-shaped unit and Z-shaped unit; Expansion unit has expansion joint and bus unit; The plug-in unit has a plug-in box unit. All units are usually designed by the bus duct manufacturer according to the standard, or non-standard design can be adopted after on-site measurement according to the needs of the project, so as to meet the needs of users and installation.

母线槽的选型通常从以下几方面加以综合考虑：消防要求，绝缘材料要阻燃、耐热性能要好，在高温下不释放有毒气体，结构上防止烟囱效应，应优先选择密集绝缘母线槽，如选用空气绝缘型，则需在线槽壳体内每单元设置阻火隔断;对特别重要场所，为保证应急电源火情下维持工作，应选用耐火型槽。

The selection of bus duct is generally considered from the following aspects: fire protection requirements, insulating materials should have good flame retardant and heat resistance, do not release toxic gas at high temperature, and prevent chimney effect in structure. Dense insulated bus duct should be preferred. If air insulation type is selected, fire blocking partition should be set for each unit in the trunking shell; For particularly important places, in order to ensure the maintenance of emergency power supply in case of fire, fire-resistant groove shall be selected.

至于安装场所，考虑槽外壳防护等级，其次是建筑结构对线槽外形、安装支架形式和跨距的影响：室内专用工作场所，如大容量变电所内为提高其散热效果，可采用IP30等级的母线槽;室内的普通工作，如楼层电气竖井及配电间内，为保证安全性，应选用不低于IP40等级的母线槽;室内潮湿场所或有防溅水要求的。

As for the installation site, consider the protection grade of the trunking shell, followed by the influence of the building structure on the shape, installation support form and span of the trunking: in the indoor special workplace, such as the high-capacity substation, in order to improve its heat dissipation effect, the bus duct with IP30 grade can be used; For ordinary indoor work, such as floor electrical shaft and distribution room, in order to ensure safety, bus duct of no less than IP40 grade shall be selected; Indoor damp places or places with splash prevention requirements.

山东桥架认为为保证其在遭到溅水时仍能正常工作，应选用不低于IP54等级的母线槽;室外或有特殊要求的，如防喷水，防海浪和防腐蚀场所可分别树脂绝缘母线槽;大跨距场所，应选用外壳加强型母线槽;额定电流，应从技术性能、散热效果、价格等方面加以综合考虑，目前市场较多选用散热性能上佳和能耗低的铝合金外壳低阻抗密集绝缘母线槽。

In order to ensure that it can still work normally in case of splashing, bus duct with grade no less than IP54 shall be selected; Resin insulated bus duct can be used outdoors or in places with special requirements, such as anti water spray, anti wave and anti-corrosion; In places with large span, shell reinforced bus duct shall be selected; The rated current should be comprehensively considered from the aspects of technical performance, heat dissipation effect and price. At present, aluminum alloy shell low impedance dense insulated bus duct with good heat dissipation performance and low energy consumption is widely used in the market.

母线槽的输变电优越性是普通电力电缆无法比较和超越的，尤其适应高层建筑物和大规模工厂经济合理配线的需要。当您选用母线槽的同时，我们将以很好的方案解决建筑领域日益复杂的控制难题，保证电力传输的安全可靠。更多内容的了解您可以来网站 www.comprepyme.com咨询！

The advantages of power transmission and transformation of bus duct can not be compared and surpassed by ordinary power cables, especially to meet the needs of economic and reasonable wiring of high-rise buildings and large-scale factories. When you choose bus duct, we will solve the increasingly complex control problems in the construction field with good solutions to ensure the safety and reliability of power transmission. For more information, you can visit www.sddlqj.com Cn consultation!