KYN28A-12型(xing)鎧裝(zhuang)移開(kai)(kai)式交流金屬封閉開(kai)(kai)關設(she)備，系(xi)(xi)3.6~12KV三相交流50Hz，單(dan)母(mu)線及單(dan)母(mu)線分段系(xi)(xi)統的(de)(de)成套配(pei)(pei)(pei)電(dian)(dian)裝(zhuang)置。主要用(yong)(yong)(yong)于發電(dian)(dian)廠、中小(xiao)型(xing)發電(dian)(dian)機送電(dian)(dian)、工礦企事業配(pei)(pei)(pei)電(dian)(dian)以及電(dian)(dian)力系(xi)(xi)統的(de)(de)二次變電(dian)(dian)的(de)(de)受電(dian)(dian)、送電(dian)(dian)及大型(xing)離壓電(dian)(dian)動(dong)機起動(dong)等，實(shi)行控制保護、監測之用(yong)(yong)(yong)。除可配(pei)(pei)(pei)用(yong)(yong)(yong)與之配(pei)(pei)(pei)套的(de)(de)國產VS S1型(xing)真(zhen)空斷路器外，還(huan)可配(pei)(pei)(pei)用(yong)(yong)(yong)ABB公司的(de)(de)VD4型(xing)、施耐(nai)德公司的(de)(de)HVX-12 型(xing)等真(zhen)空斷路器，實(shi)為一種性能優越的(de)(de)配(pei)(pei)(pei)電(dian)(dian)裝(zhuang)置。