Electric field relaxation device of vacuum interrupter

摘要

PROBLEM TO BE SOLVED: To solve the problem in which, when a ground layer is present around a VI having an intermediate shield, the voltage sharing of the potential of the intermediate shield joined to an insulating material of the VI is biased to the ground side by being affected by the ground capacitance, so, the electric field on the power-source side of the VI becomes high.SOLUTION: A second intermediate shield is provided between a power-source side energization part inside a VI and an intermediate shield joined to a ground side energization part and an insulating material. By interposing an intermediate insulating material between the second intermediate shield and the intermediate shield joined to the insulating material to form a portion of generating a ground voltage, a potential difference between the power-source side energization part and the second intermediate shield is made to be relatively small.SELECTED DRAWING: Figure 1