Cov khoom siv hluav taws xob molded case(MCCB) yog cov khoom siv tiv thaiv dav dav hauv cov kab ke faib hluav taws xob qis. Lawv feem ntau yog siv los muab kev tiv thaiv overload, luv luv thiab tsis tshua muaj hluav taws xob rau cov kab thiab cov khoom siv, thiab tseem muaj lub luag haujlwm ntawm kev cais cov chaw muab hluav taws xob. Nws tus nqi raug cuam tshuam los ntawm cov yam xws li hom, tam sim no ntsuas, lub peev xwm tawg thiab kev teeb tsa ua haujlwm. Feem ntau, tus nqi ntawm cov khoom siv hluav taws xob hauv tsev yog li ntawm 50 txog 1,000 yuan, ntawm cov khoom uas muaj peev xwm tsawg dua 100A feem ntau tus nqi ntawm 50 txog 300 yuan. Tus nqi rau cov lus qhia tam sim no loj (250A txog 800A) yog kwv yees li 300 txog 3,000 yuan. Cov khoom ntawm cov npe thoob ntiaj teb xws li Schneider Electric, ABB thiab Siemens kim heev. Tus nqi ntawm qee cov khoom ntse tuaj yeem ncav cuag ntau txhiab yuan.

Cov khoom siv hluav taws xob molded case feem ntau yog siv rau hauv cov chaw tsim khoom lag luam, cov tsev lag luam, cov tsev nyob, cov txee hluav taws xob, cov tshuab hluav taws xob photovoltaic thiab kev tsim kho vaj tse, thiab lwm yam. Hauv kev lag luam, nws tuaj yeem siv rau kev tiv thaiv cov cav hluav taws xob, cov khoom siv tsim khoom thiab cov kab faib khoom. Hauv kev tsim kho, nws feem ntau yog siv ua lub qhov hloov tseem ceeb lossis ceg ntawm lub txee faib khoom kom ntseeg tau tias kev ua haujlwm zoo thiab ruaj khov ntawm lub zog muab hluav taws xob.