To　develop　an　AC　control　and　protective　switching　device　with　simple　structure　and　large　breaking　capacity　of　short-circuit　currents　is　an　important　direction　for　low　voltage　switching　devices.　A　low　voltage　control　and　protection　technology　was　expound,　it　realized　switching　control　and　fault　protection　with　fault　early　detection　and　its　fast-speed　breaking　with　double　eddy　current　repulsion　plate　mechanism　by　replacing　the　traditional　electromagnetic　operating　mechanism.　Firstly,　the　improved　artificial　life　algorithm　was　adopted　to　implement　multi-parameter　optimization,　including　the　repulsion　plate　thickness,　the　wire　diameter　and　the　number　of　turns,　and　the　mechanism＇s　optimum　parameters　of　fast　breaking　were　obtained.　Secondly,　a　prototype　was　designed　and　its　dynamic　characteristics　were　tested,　which　verified　the　excellent　dynamic　characteristics　of　eddy　current　repulsion　mechanism.　Finally,　the　control　and　protective　switching　device　prototype　was　applied　in　the　low　voltage　distribution　fault　experimental　system.　The　experimental　result　shows　that　the　proposed　low　voltage　control　and　protection　technology　can　limit　and　break　short　currents　rapidly,　and　that　supplies　a　new　thought　to　realize　the　low　voltage　control　and　protection　integration　devices.　©　2017　Chin.　Soc.　for　Elec.　Eng.