| 摘要 |
PROBLEM TO BE SOLVED: To provide a device which improves operating stability of switch changeover of an on-load tap changer.SOLUTION: An energy accumulation device 1 is installed on an on-load tap changer. The energy accumulation device 1 has a main lever 3 which is fixed to an output axis 2 connected to a driving part driving a changeover switch and controls rotations of the main lever 3 by an auxiliary lever 7. A main spring 8 is installed on a tip part of the main lever 3 and a tip part of the auxiliary lever 7 and an auxiliary spring 5, which stretches the main lever 3 towards the central part within the operation range, is installed on the tip part of the main lever 3. The main lever 3 is driven by elastic force accumulated in the main spring 8 and the auxiliary spring 5. Further, a locking groove 3a is formed on the shaft end of the main lever 3 and a stopper 6 is installed which is engaged by the locking groove 3a. |
