電伴(ban)熱系統，其在歸類(lei)上，假如(ru)是(shi)(shi)按可用工作電壓(ya)來開展得話，那(nei)么是(shi)(shi)能夠分成低壓(ya)型(xing)、中壓(ya)型(xing)及其高壓(ya)型(xing)這幾(ji)種。

低壓型：其工(gong)作電(dian)壓(ya)范疇是為(wei)12—36V；

中壓型：電(dian)壓范(fan)圍為100-660伏(fu)，連(lian)續使(shi)用(yong)長度(du)不超過200米(mi)；

高壓型：電(dian)壓(ya)范圍(wei)為380-650伏，連(lian)續使用長(chang)度一般(ban)超過500米；

以上三種(zhong)基本可以滿足絕大部分的需求。中國常(chang)用的380伏和220伏電(dian)(dian)(dian)壓等(deng)級。采用三相(xiang)四線主(zhu)電(dian)(dian)(dian)源，配(pei)電(dian)(dian)(dian)電(dian)(dian)(dian)路(lu)采用單相(xiang)23伏交流電(dian)(dian)(dian)，控制開(kai)關不超過30A。每個回路(lu)都(dou)有漏(lou)電(dian)(dian)(dian)保護，動(dong)作電(dian)(dian)(dian)流設置在(zai)30mA。舉例說明：

冷藏門、地(di)板等防(fang)凍電(dian)(dian)(dian)熱帶應采用(yong)36伏以下的電(dian)(dian)(dian)源電(dian)(dian)(dian)壓，以確保(bao)(bao)人(ren)身安全。公共區(qu)域(yu)管道(dao)保(bao)(bao)溫(wen)伴(ban)熱電(dian)(dian)(dian)壓為220v。此外，還有(you)一根(gen)帶保(bao)(bao)護套(tao)的電(dian)(dian)(dian)熱絲，它具有(you)良好的耐壓和絕緣性(xing)能，可由220伏電(dian)(dian)(dian)壓供(gong)電(dian)(dian)(dian)。在一些工 業性(xing)區(qu)域(yu)，有(you)特(te)殊需求的可以選擇(ze)380V電(dian)(dian)(dian)壓的電(dian)(dian)(dian)伴(ban)熱產(chan)品。