| 摘要 |
PROBLEM TO BE SOLVED: To improve on reliability of a gas-blast power-breaker through protection of an input control mechanism. SOLUTION: The gas-blast power-breaker is provided with a breaking spring 26 and a making spring 28 opening and closing a contact, a rotating shaft 4 fixed on a concentric line with a main lever 5 and supported in free rotation inside a case 1, a gear wheel 52 fixed to the rotating shaft 4 with a partial gear 53 fitted at a part in a peripheral direction, and a pinion 51 meshing with the gear wheel and the partial gear. When the pinion continues to rotate after the making spring stores energy, meshing of the gear wheel and the pinion is released. A making spring link 27 connects the making spring and the gear wheel. An angle made by an axis line of the making spring link and an axis X1 when the energy storing of the making spring is completed is within a range of 0°and around 10°, with reference to the axis X1 passing an axial center of the rotating shaft and parallel with an action direction of the making spring. COPYRIGHT: (C)2007,JPO&INPIT
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