Solenoid tso cai muab kev tiv thaiv xwb, ntawd ces yog luv Circuit Court kev tiv thaiv, uas yuav ua tau ib tug sib nqus rub rov qab, thaum lub electromagnetic releaser kwj loj txaus quab yuam kom overcome hlab magnetic teb generated thaum lub springs nyiam tus armature tus cab bar hlais tawm hauv Circuit Court los tsav tes hauj lwm.
Tripping Thermo-sib nqus li muab kev tiv thaiv thiab kev tiv thaiv thermal, thermal tiv thaiv los yog sib tshooj rau tiv thaiv. Thermal kev tiv thaiv: tam sim no tom qab qhia tawm cov cua sov caij cua kub (thermal currents hla lub bimetallic), bimetallic thermal deformation, deformation rau ib yam twg, tus cab bar hlais tawm hauv Circuit Court mus ua tsav. Feem ntau, siv thermomagnetic Circuit Court breaker muab short-circuit thiab tshaj txoj kev tiv thaiv, solenoid tshwj xeeb zaus qhia tawm no muab kev tiv thaiv luv Circuit Court, thiab lwm yam hais (xws li thermal relays) muab cov kev tiv thaiv sib tshooj.
Tso tawm hauv yuav muaj tag nrho cov saum no, thiab yuav muab tau yooj yim txheej. Qhov uas qhia tawm hauv yog siv ua hauv circuits, ntsuam xyuas tam sim no lub ntsiab Circuit Court, amplifier, laub xub mechanism.