| 摘要 |
<p>A protective device of three-phase motor comprises a protrusion (35) provided in a housing (22) constituting an enclosed container (21), three conductive terminal pins (26) secured airtightly to a metal plate (23) constituting the enclosed container (21), three fixed contacts (27) bonded to the conductive terminal pin (26), a thermal response plate (32) drawn into the shape of a plate and reversing the curving direction at a predetermined temperature, three movable contacts (33) bonded to the thermal response plate (32) and constituting three pairs of opening/closing contact along with the fixed contacts (27), and a resilient member (34) for clamping the central portion of the thermal response plate (32) between the protrusion (35) and urging the thermal response plate (32) in the direction receding from the fixed contact (27).</p> |
