线槽这一系列的产品，它在实际的建设中发挥了重要的作用，并且现在用的比较多。不过在购买的时候，有一些具体的注意事项还需要关注，这样才能够发挥好它的实际的作用价值。

The trunking series of products has played an important role in actual construction and is now widely used. However, when making a purchase, there are some specific precautions that need to be paid attention to in order to fully realize its practical value.

购买母线槽注意事项：

Precautions for purchasing bus duct:

经济方面：通常应按长期工作电流选择线截面。并按通过大短路电缆条件下，校验短时热稳定性和动稳定性。由于导体存在电阻和多导体接近时交流电流趋表效应等因素影响，该线槽通过电流时会引起发热。

In terms of economy, the wire cross-section should usually be selected based on the long-term operating current. And verify the short-term thermal stability and dynamic stability under the condition of passing through a large short-circuit cable. Due to factors such as the resistance of conductors and the AC current meter effect when multiple conductors approach each other, this trunking will generate heat when passing current.

不同的材料、截面的线槽给出了相应的长期允许电流值，选择的时候，应使线槽实际的大的长期工作电流小于所选截面线槽的长期允许电流值。年均负荷较大较长的情况下，如屋外配电装置，通常按经济电流密度法选择。

Different materials and cross-sectional cable trays provide corresponding long-term allowable current values. When selecting, the actual large long-term operating current of the cable tray should be lower than the long-term allowable current value of the selected cross-sectional cable tray. When the average annual load is relatively large and long, such as outdoor power distribution equipment, the economic current density method is usually used for selection.

母线槽在选用时还要有耐火母线的耐火时间和标准，当然选用也要选用相对耐力高的才好。在选用母线时，当然也要考虑使用场所，如耐火母线适用于应急电源、消防水泵电源、发电机等电缆输送干线，它能在发生火灾时保证电缆输送的完整性，确保消防救火水泵及应急电源正常供电。

When selecting busbar trunking, it is also necessary to have the fire resistance time and standards of the fire-resistant busbar, and of course, it is better to choose one with relatively high endurance. When selecting busbars, the usage location should also be considered. For example, fire-resistant busbars are suitable for emergency power supplies, fire pump power supplies, generators, and other cable transmission main lines. They can ensure the integrity of cable transmission in the event of a fire, ensuring the normal power supply of fire pumps and emergency power supplies.

在结构设置上,还需要做好防止烟囱效应,这个时候建议选择密集绝缘母线槽。在特殊的场合中,应该做好维持工作,选择耐火型号.其实在不同的场合下需要的型号是不同的。至于多大的电流型号,还需要看具体的电力设计。它需要专业的工作人员进行施工和设计。

In terms of structural design, it is also necessary to prevent chimney effects. At this time, it is recommended to choose dense insulated bus ducts. In special occasions, maintenance work should be done well and fire-resistant models should be selected In fact, the required models vary in different situations. As for the type of current, it still depends on the specific electrical design. It requires professional staff for construction and design.

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