| 摘要 |
<p>PURPOSE:To form an economical and effective vibration-proof structure by providing a buffer means between a support base for supporting a grounding container for accommodating a gas insulated switchgear providing leadout bushings at its upper area and a grounding container. CONSTITUTION:A fixing plate 6 is fixed, via a buffer means 7, to a supporting base 2 mounted on the foundation 3. A leadout bushing 5 is attached to the upper side of the fixing plate 6, while a grounding container 1 at the lower side thereof. A leadout end 4 for connection is connected to the grounding container 1 and the container is filled with an insulation gas, for example, SF6 and a switching device not illustrated in the figure and a bushing 5 are connected. A spring constant of the buffer means is preset so that the natural frequency determined by the masses of bushing 5 and grounding container, etc., becomes equal to 1/1.4 of the natural frequency of discrete bushing 5. Alternately, a hermetically sealed container filled with a liquid is attached to the grounding container 1 so that sloshing natural frequency of liquid is set equal to the natural frequency of the bushing 5. Thereby, economical and effective vibration-proof structure can be formed.</p> |
