| 摘要 |
<p>Circuit breaker which is disposed between a power source and a load to stop the supply of electric power from the power source to the load when there is a fault on the load side. The mechanism of the circuit breaker is composed of a contact opening and closing mechanism (4, 6, 17, 23) which opens or closes contacts (8, 10) by the operation of a handle (4), and a contact breaking mechanism (18, 27, 37, 46) which separates the contacts (8, 10) when a fault in the load occurs. The mechanisms (4, 6, 17, 23) and (18, 27, 37, 46) are constructed so that they do not operate when the contacts are opened or closed by the handle (4), but operate only when the load is interrupted abnormally, thereby hastening the contact-opening time during the contact breaking, and increasing the opening distance between the movable contact (8) and the stationary contact (10). The mechanical stresses applied to the mechanisms (18, 27, 37, 46) during the opening and closing of the contacts by the handle (4) are also reduced.</p> |
