恒功率(lv)電(dian)(dian)(dian)熱帶電(dian)(dian)(dian)源母(mu)線為二根平行(xing)絕(jue)緣(yuan)銅(tong)線，在內絕(jue)緣(yuan)層上纏(chan)繞電(dian)(dian)(dian)熱絲，并(bing)將(jiang)電(dian)(dian)(dian)熱絲每隔一定(ding)距離與母(mu)線連接，形(xing)成(cheng)連續(xu)(xu)并(bing)聯電(dian)(dian)(dian)阻(zu)。母(mu)線通電(dian)(dian)(dian)后，各并(bing)聯電(dian)(dian)(dian)阻(zu)發(fa)熱，因而形(xing)成(cheng)一條連續(xu)(xu)的加熱電(dian)(dian)(dian)纜。

恒功(gong)率電熱(re)帶主要用于(yu)各處管道(dao)、儀表的(de)防凍(dong)、保溫(wen)，最(zui)高維持(chi)溫(wen)度150℃，可用于(yu)工廠(chang)一區(qu)、二區(qu)爆炸性(xing)氣體場合。

恒功率電(dian)(dian)熱帶單(dan)位長度(du)(du)輸出功率恒定(ding)(ding)，發熱量恒定(ding)(ding)，且不(bu)受(shou)環境溫度(du)(du)變(bian)化而改變(bian)，使用長度(du)(du)和功率成正比，長度(du)(du)可以(yi)任意裁切，有普(pu)通(tong)型(xing)和加強(qiang)(qiang)型(xing)兩種，加強(qiang)(qiang)型(xing)電(dian)(dian)熱帶是在普(pu)通(tong)型(xing)電(dian)(dian)熱帶外層(ceng)再包(bao)裹一層(ceng)防腐絕緣層(ceng)，其余結構與普(pu)通(tong)型(xing)電(dian)(dian)熱帶相同。