電線接觸不良的情況有很多種,相信很多人應該也遇到過,常見的一種就是電線與插座之間沒接好,這種情況輕則會導致跳閘斷電,重則短路起火,不管是哪種情況我們都該多加留心去預防避免,那么電線接觸不良還有哪種情況呢，下面我們就來盤點一下,大家以免“踩雷”。
There are many kinds of bad contact of wires. I believe many people have also encountered it. The common one is that the wires and sockets are not well connected. This kind of situation will lead to tripping and power failure, or short circuit and fire. No matter what kind of situation, we should pay more attention to prevent and avoid it. So what kind of situation is there in bad contact of wires? Let's take a stock, Let's avoid stepping on thunder.
1.電線與插座接觸不良
1. Poor contact between wire and socket
在所有接觸不良火災原因中,插座處電線短接電阻過大引起的火災居一位。電氣線路的連接處,若存在接點接觸松弛,接點間的電壓足以擊穿空氣間隙形成電弧,迸出火花,點燃附近的可燃物形成火災。這種情況還會導致電壓異常,所以有時電器使用時會有反應,卻不能正常使用也可能是其使用的插座接觸不良的原因。
Among all the fire causes of poor contact, the fire caused by excessive short circuit resistance at the socket is the most common. If there is loose contact at the junction of the electrical circuit, the voltage between the contacts is enough to break through the air gap, form an arc, burst out sparks, ignite nearby combustibles, and form a fire. This situation will also lead to abnormal voltage, so sometimes the appliance will react when it is used, but it can not be used normally. It may also be the cause of poor contact of the socket.
2.電線接線頭接觸不良
2. Poor contact of wire connector
電線接頭雖然用膠布之類的處理過,但可能會因為發(fā)熱等問題導致膠布老化,如果在同- -位置多過一個接頭存在也會更容易造成短路、 漏電等問題存在。
Although the wire connector has been treated with adhesive tape, the adhesive tape may be aged due to heating and other problems. If there is more than one connector at the same location, it will also easily cause short circuit, leakage and other problems.
3.電器設備自身接觸不良
3. Poor contact of electrical equipment
有個別電器由于設備違反接線方式、連接不牢,或維護保養(yǎng)不良,或長期運行過程中在接頭處產生導電不良的氧化膜,或接頭因振動、熱的作用等,使連結處發(fā)生松動、氧化造成接觸電阻過大。
Due to the violation of wiring mode, weak connection, poor maintenance, or poor conductivity oxide film at the joint during long-term operation, or vibration and heat action of the joint, some electrical appliances loose and oxidize at the joint, resulting in excessive contact resistance.
雖說，上面三種情況是常出現(xiàn)的。但它們導致的結果基本上都是一樣的：
Although the above three situations often occur. But the results are basically the same
一,導線接觸點劇烈發(fā)熱,增加接觸點的電阻從而加劇了發(fā)熱。
1、 The contact point of the conductor is heated violently, which increases the resistance of the contact point and aggravates the heating.
二,導線發(fā)熱會造成接觸點附近的導線外部塑料絕緣材料受熱,大大地降低它的絕緣能力,造成漏電。
2、 The heating of the conductor will cause the plastic insulation material outside the conductor near the contact point to be heated, greatly reducing its insulation capacity and causing electric leakage.
三，如果電線的銅芯線劇烈發(fā)熱而熔融。則電線會斷裂。斷裂時會產“生電弧,并進一步破壞絕綠 ,使得漏電加劇,引起電線對地短路。我們把它叫做單相接地故障。
3、 If the copper core of the wire is heated violently and melted. The wire will break. When it breaks, it will produce "generating arc" and further damage the insulation, which will aggravate the leakage and cause the wire short circuit to the ground. We call it a single phase to ground fault.
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