电线接触不良的情况有很多种,相信很多人应该也遇到过,常见的一种就是电线与插座之间没接好,这种情况轻则会导致跳闸断电,重则短路起火,不管是哪种情况我们都该多加留心去预防避免,那么电线接触不良还有哪种情况呢，下面我们就来盘点一下,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.电线与插座接触不良
1. Poor contact between wire and socket
在所有接触不良火灾原因中,插座处电线短接电阻过大引起的火灾居一位。电气线路的连接处,若存在接点接触松弛,接点间的电压足以击穿空气间隙形成电弧,迸出火花,点燃附近的可燃物形成火灾。这种情况还会导致电压异常,所以有时电器使用时会有反应,却不能正常使用也可能是其使用的插座接触不良的原因。
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.电线接线头接触不良
2. Poor contact of wire connector
电线接头虽然用胶布之类的处理过,但可能会因为发热等问题导致胶布老化,如果在同- -位置多过一个接头存在也会更容易造成短路、 漏电等问题存在。
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.电器设备自身接触不良
3. Poor contact of electrical equipment
有个别电器由于设备违反接线方式、连接不牢,或维护保养不良,或长期运行过程中在接头处产生导电不良的氧化膜,或接头因振动、热的作用等,使连结处发生松动、氧化造成接触电阻过大。
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.
虽说，上面三种情况是常出现的。但它们导致的结果基本上都是一样的：
Although the above three situations often occur. But the results are basically the same
一,导线接触点剧烈发热,增加接触点的电阻从而加剧了发热。
1、 The contact point of the conductor is heated violently, which increases the resistance of the contact point and aggravates the heating.
二,导线发热会造成接触点附近的导线外部塑料绝缘材料受热,大大地降低它的绝缘能力,造成漏电。
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，如果电线的铜芯线剧烈发热而熔融。则电线会断裂。断裂时会产“生电弧,并进一步破坏绝绿 ,使得漏电加剧,引起电线对地短路。我们把它叫做单相接地故障。
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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