Patent ID: 6897757

Claim:
An accessory device for a manual motor starter, the accessory device comprising: a case forming an outer appearance of the accessory device; a under-voltage trip coil section installed in the case and including an under-voltage trip coil generating magnetic flux depending on voltage applied thereto and a first fixed core installed adjacent to the under-voltage trip coil and magnetize by magnetic flux generated from the under-voltage trip coil, thereby generating attracting force; a remotely switchable trip coil section installed in the case and including a remotely switchable trip coil for generating magnetic flux depending on remotely switchable electric source voltage applied thereto, a second fixed core for generating attracting force when the second fixed core is magnetized by magnetic flux generated from the remotely switchable trip coil, and a first movable core having a rod portion extending downward and movable in a downward direction when attracting force is applied thereto from the second fixed core; a under-voltage trip power source terminal electrically connected to the under-voltage trip coil so as to apply the voltage to the under-voltage trip coil; a remotely switchable trip power source terminal electrically connected to the remotely switchable trip coil so as to apply remotely switchable electric source voltage to the remotely switchable trip coil; a second movable core for separating from the first fixed core in a downward direction when under-voltage is applied thereto through the under-voltage trip power source terminal and for downwardly rotating pressed by the rod portion of the first movable core when the remotely switchable electric source voltage is applied to the remotely switchable trip coil through the remotely switchable trip power source terminal; and a lever mechanically connected to the second movable core so as to move together with the second movable core for tripping the manual motor starter.