橋架引起火災(zāi)的主要原因是電線電纜過載、短路、過大的接觸電阻和外部熱源的作用。在短路、局部過熱、外熱等故障狀態(tài)下，絕緣材料的電阻降低，絕緣能力喪失，甚燒傷，導(dǎo)致火災(zāi)。下面就讓山東電纜橋架廠家為您講講這方面的內(nèi)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.

當(dāng)火災(zāi)溫度一般為800℃1000℃時，導(dǎo)體電纜會迅速喪失絕緣容量，導(dǎo)致短路等二次電氣事故，造成較大的損失；橋架內(nèi)部電線電纜從絕緣層油浸電纜紙、交聯(lián)聚乙烯、乙丙橡膠等材料到油麻、聚氯乙烯外護套材料均為易燃物質(zhì)。當(dāng)局部電纜達到高溫時，會熔化，當(dāng)超過相鄰電纜的點火溫度時，會導(dǎo)致電纜群的延遲燃燒。電線電纜火災(zāi)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.

電纜負(fù)荷選擇不當(dāng)，部分電纜長期滿載或經(jīng)常超載，電纜通道和隧道內(nèi)的高溫、積水導(dǎo)致電纜老化、潮濕、過熱，導(dǎo)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，一些單位不采取防火措施，電纜敷設(shè)混合，經(jīng)常產(chǎn)生中、低壓電纜與高壓電纜敷設(shè)的有毒煙霧；一些施工人員在敷設(shè)電纜時沒有嚴(yán)格按照施工的操作規(guī)程和技術(shù)要求，往往由于刮、觸、壓、扭等原因造成電纜外層損壞，容易進入水中濕氣，絕緣層可能通過電弧被打破，引起火災(zāi)。

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.

主要結(jié)果如下：

The main results are as follows:

(1)電線電纜粗糙，絕緣層潮濕，導(dǎo)致電纜頭和端子箱失效，電纜頭和端子箱在運行過程中發(fā)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)部分電纜機械工序操作不嚴(yán)格，不注重衛(wèi)生、雜質(zhì)、污垢等清洗，造成界面接觸不良；

(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)接頭工藝不佳，制造質(zhì)量不高，防火措施較少。在故障條件下，接頭受到高壓、大電流的沖擊，引起接頭火災(zāi)；

(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)電纜接地不良，地線焊接不穩(wěn)定，接觸不良，電阻值過大，導(dǎo)致電纜接地故障電流小于正常短路電流，使電流保護器不能及時切斷故障，出現(xiàn)電弧和電火花。

(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.

橋架引起火災(zāi)的主要原因了解就是上述所講解的內(nèi)容了，為了不出現(xiàn)像是火災(zāi)這樣的“災(zāi)害”，就需要大家在使用前后以及使用期間做好相關(guān)的預(yù)防準(zhǔn)備以及充分了解到注意事項才行，更多信息獲取就來我們網(wǎng)站http://m.ymmgjx.net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 http://m.ymmgjx.net Let's see.