簡要(yao)描述(shu)：從結構型式(shi)(shi)(shi)上分，可分為：單(dan)(dan)(dan)相(xiang)(xiang)(xiang)鐵殼(ke)式(shi)(shi)(shi)，單(dan)(dan)(dan)相(xiang)(xiang)(xiang)鐵殼(ke)串(chuan)級(ji)式(shi)(shi)(shi)，單(dan)(dan)(dan)相(xiang)(xiang)(xiang)絕(jue)緣筒外殼(ke)式(shi)(shi)(shi)和單(dan)(dan)(dan)相(xiang)(xiang)(xiang)絕(jue)緣筒外串(chuan)級(ji)四種(zhong)。單(dan)(dan)(dan)相(xiang)(xiang)(xiang)鐵殼(ke)式(shi)(shi)(shi)般適用(yong)于(yu)電(dian)(dian)壓(ya)、容量(liang)(liang)較(jiao)低且便于(yu)攜(xie)帶或電(dian)(dian)壓(ya)容量(liang)(liang)較(jiao)大固(gu)定式(shi)(shi)(shi)，但對(dui)(dui)局(ju)部(bu)放(fang)電(dian)(dian)量(liang)(liang)要求(qiu)較(jiao)低的(de)氣(qi)場(chang)合，電(dian)(dian)壓(ya)不太高，且比較(jiao)固(gu)定使用(yong)的(de)場(chang)合；單(dan)(dan)(dan)相(xiang)(xiang)(xiang)絕(jue)緣筒式(shi)(shi)(shi)串(chuan)級(ji)式(shi)(shi)(shi)，主要適用(yong)于(yu)對(dui)(dui)局(ju)部(bu)放(fang)電(dian)(dian)要求(qiu)較(jiao)高，電(dian)(dian)壓(ya)高、容量(liang)(liang)大，或電(dian)(dian)壓(ya)低容量(liang)(liang)小，便于(yu)攜(xie)帶的(de)場(chang)合，以(yi)上四種(zhong)型號用(yong)戶根據不同要求(qiu)自(zi)行選擇。