實驗證明當電流過導體時，由于自由電子的碰撞，導體的溫度會升高。這是因為導體吸收的點電能轉換成為熱能的緣故。這種現象叫做電流的熱效應。電流通過導體時所產生的熱量與電流強度的平方、導體本身的電阻、以及電流通過的時間成正比。這一結論稱為焦耳——楞次定律，其數學表達式為：Q=I²Rt，公式中：
Experiments show that when a current is over a conductor, the temperature of the conductor increases because of the collision of free electrons. This is because the electrical energy absorbed by the conductor is converted into thermal energy. This phenomenon is called the thermal effect of the current. The heat generated by a current through a conductor is proportional to the square of the current intensity, the resistance of the conductor itself, and the time passed by the current. This conclusion is called Joule - Lenz's law, the mathematical expression of Q=I - Rt in the formula:
Q：電流通過導體所產生的熱量，單位：焦耳（J）；
Q: the heat generated by a current through a conductor, unit: Joule (J);
I：通過導體的電流，單位：安（A）；
I: through the current of the conductor, unit: an (A);
R：導體的電阻，單位：歐（Ω）
R: the resistance of a conductor, unit: Europe (omega)
如果熱量以卡位單位，則Q=I?Rt公式可寫成：Q=0.24I²Rt=0.24Pt，此公式稱為焦耳-楞次定律。其中t的單位為妙，R的單位是歐，I的單位是安，熱量的單位是卡。JFEM電機引接線電流的熱效應
If the heat in card unit, Q=I? Rt equation can be written as: Q=0.24I - Rt=0.24Pt, this formula is called the Joule Lenz. The unit of T is wonderful, the unit of R is Europe, and the unit of I is Ann, and the unit of heat is card.
電流的熱效應在生產上有許多應用。電燈是利用電流產生的熱使得燈絲達到白熾狀態而發光，熔斷器是利用電流產生的熱使其熔斷而切斷電源。電流的熱效應也是近代工業中的一種重要加熱方式，如利用電爐煉鋼，電機通電烘干等。電流的熱效應也有它不利的一面，由于構成電氣設備的導線存在電阻，所有電氣設備在工作時要發熱，使溫度升高。如果電流過大，溫度升高多就會加速絕緣體老化，甚至損壞設備。為了保證電氣設備能正常工作，各種設備都規定了限額，如額定電流、額定電壓、和額定電功率等。JFEM電機引接線電流的熱效應
The thermal effect of current has many applications in production. The electric lamp is the heat produced by the current that makes the filament light up in the incandescent state, and the fuse uses the heat generated by the current to break it off and cut off the power. The thermal effect of current is also an important heating mode in modern industry, such as the use of electric furnace steelmaking, electric motor drying and so on. The thermal effect of electric current also has its disadvantage. Because there are resistances in electrical conductors that make up electrical equipment, all electrical equipments must be heated when they are working, so that the temperature will increase. If the current is too large, the increase of temperature will accelerate the aging of the insulator and even damage the equipment. In order to ensure the normal work of electrical equipment, all kinds of equipment are prescribed limits, such as rated current, rated voltage, and rated electric power.
電器設備的額定值通常用下標“e”表示，如Ie、Ue、Pe等，各種電器設備的銘牌上都有標注他們的數值。
The rated value of electrical equipment is usually expressed as "e", such as Ie, Ue, Pe and so on. All kinds of electrical equipment nameplates are marked with their values.
江蘇春晨電纜有限公司，是一家專注于計算機電纜，電機引接線，高壓電機引接線，JFEM電機引接線，JG電機引接線，扁電纜，硅橡膠電纜，高溫電纜產品和特種電纜產品研究、開發、生產及銷售的高科技企業，并在全國各地設有分支機構。公司技術和研發實力雄厚，公司自成立以來，始終堅持以人才為本、誠信立業的經營原則，薈萃*，將*進的信息技術、管理方法及企業經驗與國內企業的具體實際相結合，為企業提供*的解決方案，幫助企業提高管理水平和生產能力，使企業在激烈的市場競爭中始終保持競爭力，實現企業快速、穩定地發展。較好的產品、較好的服務、較好的信譽，也愿意成為您Z可信賴的*合作伙伴。公司主要產品，DJYVP計算機電纜，DJFPV計算機電纜，DJFFP計算機電纜，電機引接線，高壓電機引接線，JFEYH高壓電機引接線，JG電機引接線，JEM JFEM電機引接線，JXN電機引接線，JBQ電機引接線，扁電纜，YFFB扁電纜，YCB扁電纜，TVVB扁電纜，FDZ-YEYH風能電纜，太陽能電纜，起重機電纜，高溫電纜，控制電纜，電力電纜，DJFPV計算機電纜，DJFFP計算機電纜,DJYVP2，DJYVP3，DJYPV,DJYP2V,DJYP3V,DJYPVP,DJYP2VP2，聚乙烯絕緣對絞組銅帶分屏蔽及總屏蔽，公司以創新為先導、現代化企業為基礎、滿足用戶要求為根本宗旨，為客戶提供優質的產品。公司熱忱歡迎海內外朋友前來指導洽談。
電機引接線，電線電纜，高壓電機引接線，JFEYH高壓電機引接線
JFEM電機引接線電流的熱效應 特種電纜 產品信息
關鍵詞：熔斷器
