桥架引起火灾的主要原因是电线电缆过载、短路、过大的接触电阻和外部热源的作用。在短路、局部过热、外热等故障状态下，绝缘材料的电阻降低，绝缘能力丧失，甚至烧伤，导致火灾。下面就让 山东电缆桥架厂家为您讲讲这方面的内容吧。

The main causes of bridge fire are overload, short circuit, excessive contact resistance and external heat source. In case of short circuit, local overheating, external heat and other fault conditions, the resistance of insulating materials will be reduced, the insulation capacity will be lost, and even burned, resulting in fire. Let Shandong cable bridge manufacturer tell you about this.

当火灾温度一般为800℃1000℃时，导体电缆会迅速丧失绝缘容量，导致短路等二次电气事故，造成较大的损失；桥架内部电线电缆从绝缘层油浸电缆纸、交联聚乙烯、乙丙橡胶等材料到油麻、聚氯乙烯外护套材料均为易燃物质。当局部电缆达到高温时，会熔化，当超过相邻电缆的点火温度时，会导致电缆群的延迟燃烧。电线电缆火灾的主要原因如下。

When the fire temperature is generally 800 ℃ and 1000 ℃, the conductor cable will quickly lose its insulation capacity, leading to secondary electrical accidents such as short circuit, resulting in large losses; The wires and cables inside the bridge are inflammable from the insulating layer oil immersed cable paper, cross-linked polyethylene, ethylene propylene rubber and other materials to the oil hemp and PVC outer sheath materials. When the local cable reaches high temperature, it will melt. When the ignition temperature of the adjacent cable is exceeded, it will cause delayed combustion of the cable group. The main causes of wire and cable fire are as follows.

电缆负荷选择不当，部分电缆长期满载或经常超载，电缆通道和隧道内的高温、积水导致电缆老化、潮湿、过热，导致短路自燃。

Improper selection of cable load, long-term full load or frequent overload of some cables, high temperature and water accumulation in cable channels and tunnels lead to aging, moisture and overheating of cables, resulting in short circuit and spontaneous combustion.

在施工中，一些单位不采取防火措施，电缆敷设混合，经常产生中、低压电缆与高压电缆敷设的有毒烟雾；一些施工人员在敷设电缆时没有严格按照施工的操作规程和技术要求，往往由于刮、触、压、扭等原因造成电缆外层损坏，容易进入水中湿气，绝缘层可能通过电弧被打破，引起火灾。

During the construction, some units do not take fire prevention measures, and the cable laying is mixed, which often produces toxic smoke from the laying of medium and low-voltage cables and high-voltage cables; Some construction personnel do not strictly follow the operating procedures and technical requirements of construction when laying cables, and often damage the outer layer of cables due to scraping, touching, pressing, twisting and other reasons, which is easy to enter moisture in the water, and the insulation layer may be broken through the arc, causing fire.

主要结果如下：

The main results are as follows:

(1)电线电缆粗糙，绝缘层潮湿，导致电缆头和端子箱失效，电缆头和端子箱在运行过程中发生自燃爆炸；

(1) The wire and cable are rough and the insulation layer is wet, resulting in the failure of the cable head and the terminal box, and the spontaneous combustion and explosion of the cable head and the terminal box during the operation;

(2)部分电缆机械工序操作不严格，不注重卫生、杂质、污垢等清洗，造成界面接触不良；

(2) The mechanical process of some cables is not strictly operated, and the cleaning of sanitation, impurities and dirt is not paid attention to, resulting in poor interface contact;

(3)接头工艺不佳，制造质量不高，防火措施较少。在故障条件下，接头受到高压、大电流的冲击，引起接头火灾；

(3) The joint process is poor, the manufacturing quality is not high, and the fire prevention measures are few. Under fault conditions, the joint is impacted by high voltage and large current, causing joint fire;

(4)电缆接地不良，地线焊接不稳定，接触不良，电阻值过大，导致电缆接地故障电流小于正常短路电流，使电流保护器不能及时切断故障，出现电弧和电火花。

(4) The cable grounding is poor, the ground wire welding is unstable, the contact is poor, and the resistance value is too large, which causes the cable grounding fault current to be less than the normal short-circuit current, which makes the current protector unable to cut off the fault in time, resulting in arc and electric spark.

桥架引起火灾的主要原因了解就是上述所讲解的内容了，为了不出现像是火灾这样的“灾害”，就需要大家在使用前后以及使用期间做好相关的预防准备以及充分了解到注意事项才行，更多信息获取就来我们网站 //www.comprepyme.com看看吧。

The main cause of fire caused by the bridge is the content explained above. In order to avoid such "disaster" as fire, we need to make relevant preventive preparations before, after and during use and fully understand the precautions. For more information, please visit our website //www.comprepyme.com Let's see.