| 摘要 |
<p>In a thermal-type overload relay a bimetallic strip (3) deforms due to heat produced by an excessive amount of current to actuate a normally closed movable contact (16) which constitutes normally closed contact (16, 18), and an operating rod (21) is moved in a predetermined direction to thereby close a normally open contact comprising a normally open fixed contact (24) and a normally open movable contact (25). A reset rod (26) is movable in the direction perpendicular to the operating rod (21) so that when the reset rod (26) is moved in direction perpendicular to the operating rod (21), the normally open fixed contact (24) is caused to move toward the normally open movable contact (25), whereby the normally open contact (24, 25) is returned to the original position, and the normally closed contact (16, 18) is also returned to the original position by a returning movement of the normally closed movable contact (16) due to the returning movement of the operating rod (21). </p> |
