Air switch principle

When line short-circuit or serious overload current,short circuit current instantaneous tripping over setting current value,electromagnetic trip generate ac electric motor enough suction,incorporating armature suck hit the lever,toggle hook around a shaft seat up and lock release,lock wholesalemotor.blogspot.com in reaction under the action of the spring will be three pairs of single phase asynchronous motor main contactor breaking,cut off power supply.When line general overload,overcurrent,although cannot make electromagnetic trip action,but it can make the heat element produces a certain quantity of electric motors 12 volt heat,prompting bimetallic strip heated bending upwards,push the lever to toggle hook and lock release,breaking will be the main contact,cut off power supply.