Vilka är de vanliga orsakerna till att ledtråden för ett EN-huvudet elektriskt värmningsrör för att bränna ut?

De vanliga orsakerna till utbränningen av ledtråden för ett elektriskt värmerör med ett huvud är främst följande:
Overload operation power selection: If the power of the selected electric heating tube is too high and exceeds the load that the circuit or lead wire can bear, it will cause excessive current. According to Joule's law \\(Q=I^{2}Rt\\) (where Q is heat, I is current, R is resistance, and t is time), the increase in current will cause the lead wire to generate too much heat, which will cause the lead wire to burn out. Abnormal voltage: When the power supply voltage is higher than the rated voltage of the electric heating tube, according to \\(P=\\frac{U^{2}}{R}\\) (where P is power, U is voltage, and R is resistance), the actual power of the electric heating tube will increase, causing the current to increase, causing the lead wire to overload and heat up. Installation problem The lead wire is not firmly connected: If the lead wire is in poor contact with the connection point of the electric heating tube or power supply during installation, the contact resistance will increase. According to \\(Q=I^{2}Rt\\), when the current passes through, a large amount of heat will be generated at the contact point, and long-term accumulation will cause the lead wire to burn out. The lead wire is damaged by external force: During the installation process, if the lead wire is squeezed, stretched, bent or scratched by a sharp object, the insulation layer of the lead wire will be damaged, the internal wire will be exposed, and it is easy to cause a short circuit, or the cross-sectional area of ​​​​the wire will be reduced, the resistance will increase, and it will cause heating and burning. Improper use and maintenance, frequent start and stop: When the electric heating tube is started, there will be a large impact current. Frequent start and stop will cause the lead wire to repeatedly withstand this impact current, causing the metal wire inside the lead wire to gradually fatigue and break, and it will also accelerate the aging of the insulation layer. Lack of regular maintenance: After long-term use, dust, oil and other debris may accumulate on the surface of the electric heating tube, affecting the heat dissipation effect, causing the overall temperature of the electric heating tube to rise, and then conduct to the lead wire, accelerating the aging and damage of the lead wire. In addition, the insulation layer of the lead wire of the electric heating tube that has been used for a long time will also naturally age. If it is not discovered and replaced in time, it is easy to cause a short circuit and cause the lead wire to burn out. Environmental factors: The ambient temperature is too high: If the temperature of the working environment of the electric heating tube is too high, the heat dissipation conditions of the electric heating tube will deteriorate, and its own temperature will further increase. The lead wire is in a high temperature environment for a long time, the insulation performance will decrease, and the metal wire will also be damaged due to thermal expansion and other reasons. Humid environment: In a humid environment, the lead wire of the electric heating tube is easily affected by moisture, resulting in reduced insulation performance, leakage or short circuit failure, and thus burning the lead Tråd . Om det finns frätande gaser eller vätskor i miljön kommer den också att korrodera ledtråden, minska dess konduktivitet och mekaniska styrka och få ledtråden att brytas enkelt .
Om kvaliteten på det elektriska värmningsröret med ett huvud är dålig, såsom dålig kvalitet på blyritmaterialet, dålig svetsningsprocess, etc.