電纜絕緣厚度與(yu)截面積的關系是什么(me)?

任何(he)導體在(zai)電(dian)壓的作用下，就會(hui)在(zai)其(qi)周圍產生一(yi)定的電(dian)場。

電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)強度(du)(du)和電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)大小(xiao)、電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)形式與大小(xiao)、電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)對(dui)接地部分的(de)(de)距離等(deng)有(you)關。單芯(xin)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)導(dao)體(ti)(ti)周圍的(de)(de)*大電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)強度(du)(du)為由上(shang)式不(bu)難看(kan)出，對(dui)于一(yi)定電(dian)(dian)(dian)(dian)(dian)(dian)壓等(deng)級的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，如果要保持電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)導(dao)體(ti)(ti)周圍的(de)(de)*大電(dian)(dian)(dian)(dian)(dian)(dian)場(chang)強度(du)(du)不(bu)變，則電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)導(dao)體(ti)(ti)半徑越大( 即電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)導(dao)體(ti)(ti)的(de)(de)截(jie)(jie)面積越大)，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)絕緣層(ceng)厚度(du)(du)就可以相應(ying)的(de)(de)減薄。在實際工(gong)作中，大家會觀察到:對(dui)于電(dian)(dian)(dian)(dian)(dian)(dian)壓等(deng)級較低的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，其絕緣厚度(du)(du)是(shi)隨(sui)著(zhu)導(dao)體(ti)(ti)截(jie)(jie)面積的(de)(de)增大面加厚，這主要是(shi)考(kao)慮機械強度(du)(du)的(de)(de)因素所(suo)致。

對于中壓及以(yi)上電(dian)(dian)壓等(deng)級的(de)(de)(de)橡塑絕(jue)緣電(dian)(dian)力電(dian)(dian)纜(lan)，其絕(jue)緣厚(hou)度在(zai)滿(man)足電(dian)(dian)氣性能(neng)的(de)(de)(de)基礎(chu)上，主(zhu)要考慮工藝(yi)特性，因此，同(tong)一電(dian)(dian)壓等(deng)級電(dian)(dian)纜(lan)的(de)(de)(de)絕(jue)緣厚(hou)度是完(wan)全(quan)一樣(yang)的(de)(de)(de)，不(bu)隨導體半徑的(de)(de)(de)變(bian)化(hua)而改變(bian)。