I-CMTM3 yochungechunge olubunjiwe lwe-circuit breaker inesici sesakhiwo esihlangene, usayizi omncane, umthamo omkhulu wokuphuka, i-arc kagesi emfushane, kanye nezinsiza eziphelele zangaphakathi nezangaphandle.
Ama-MCCB ahlinzeka ngesixazululo esinokwethenjelwa nesiguquguqukayo sokuvikela imishini kagesi namasekhethi, enohlu lwezici ukuhlangabezana nezidingo ezihlukahlukene zohlelo lokusebenza.Inokuvikelwa kokugcwala ngokweqile , isifunda esifushane kanye ne-under-voltage.
I-MCCB ihambisana nezinga le-IEC60947-2