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空气型母线槽选择需要考虑哪些因素?

文章来源:/   作者:电缆桥架厂家发布时间:2023-07-24 浏览次数:4

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空气型母线槽导电性能:空气型母线槽集肤效应小、无须降容使用、压降小,而电缆芯为多股细铜线,且单根电缆一般不超过1000A,容量较大时则需要通过并联数根电缆来完成。并且电缆的集肤效应严重,减少了电流额定值,增加了电压降,能量损失大,电缆易老化,且容易引起线路发热。
Conductivity of air type Bus duct: the air type Bus duct has small Skin effect, does not need to be used for capacity reduction, and has small voltage drop. The cable core is multi strand fine copper wire, and a single cable generally does not exceed 1000A. When the capacity is large, it needs to be completed by connecting several cables in parallel. Moreover, the Skin effect of the cable is serious, reducing the current rating, increasing the voltage drop, causing large energy loss, easy aging of the cable, and easy to cause line heating.
空气型母线槽防护等级:因受潮、渗水、漏水、消防水管破裂、管道阀门不灵喷水等,运行过程或安装过程进入灰尘,防护等级不高的空气型母线槽容易进水、进尘而引起短路。根据标准,防护等级低IP20,意即:小于12.5~的固体物是可以进入母线本体内的。而根据实际使用场所,基于的前题,建议防护等级取值:楼层电井道达IP54,以防溅水;水平安装达IP65,防喷水。
Protection grade of air type Bus duct: due to moisture, water seepage, water leakage, fire water pipe rupture, pipeline valve ineffectiveness and water spraying, dust enters during operation or installation, and air type Bus duct with low protection grade is easy to enter water and dust, which may cause short circuit. According to national standards, the minimum protection level is IP20, which means that solid objects less than 12.5~can enter the busbar body. Based on the actual usage location and safety considerations, it is recommended to set the protection level as follows: the floor electrical shaft should reach IP54 to prevent water splashing; Horizontal installation up to IP65, anti water spray.
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空气型母线槽短路耐受强度:短路耐受强度是指配电系统在发生短路时所能承受的短路电流的能力,它是确保的一项重要技术参数。正如所有的开关(微型断路器、塑壳式断路器、框架式断路器、智能式断路器等)都有分断能力,开关的分断能力越高也越高。而合理地选择空气型母线槽短路耐受强度来匹配于整个电路系统的电气性能是非常重要的。
Short circuit withstand strength of air type Bus duct: short circuit withstand strength refers to the ability of the distribution system to withstand short circuit current in case of short circuit, which is an important technical parameter to ensure safety. Just as all switches (micro circuit breakers, molded case circuit breakers, frame circuit breakers, intelligent circuit breakers, etc.) have breaking capacity, the higher the breaking capacity of the switch, the higher the price. It is very important to reasonably select the short circuit withstand strength of air type Bus duct to match the electrical safety performance of the entire circuit system.
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