Electric Molded Case Circuit Breaker ndi mtundu wa zida zamagetsi zomwe zimakhala ndi ntchito zodzitchinjiriza monga kuchulukirachulukira, kuzungulira pang'ono komanso pansi pamagetsi. Mfundo yake yogwirira ntchito ndi yakuti pansi pazikhalidwe zogwirira ntchito, woyendetsa dera amakhala wotsekedwa, pamene dera likudzaza, chigawo chachifupi kapena pansi pa voteji ndi zolakwika zina, wophwanya dera adzadzipatula yekha, kuti ateteze dera ndi chitetezo cha zipangizo.