| 摘要 |
<p>PURPOSE:To reduce the height of a gas insulating switchgear and to improve the reliability to a gas leakage by providing earthing devices for three phases at the lower side of a breaker and at the lower side of a current transformer, and linking and connecting the earthing devices to an operating means through an operating shaft. CONSTITUTION:At the lower side of a breaker 2, one side earthing device 7a is provided along the other straight line (b) parallel to one side straight line (a), for three phases. And at the lower side of a current transformer 3 and at the position higher than the earthing device 7a, an earthing device 7b is provided along the other straight line (c) parallel to the straight line (a), for three phases. And by rotating a handle 65 in the direction of the solid line arrow, a rod 62 is lowered, and an operating shaft 52 is rotated to the left. As a result, movable rods 47 and 48 are inserted in contacts 43 and 44 at the fixing side, and made in the earthing condition. When the handle 65 is rotated in the direction of the broken line arrow, the movable rods 47 and 48 are separated from the contacts 43 and 44 at the fixing side, and the earthing is released.</p> |
