| 摘要 |
<p>PURPOSE:To maintain the insulation property of an accommodated electric apparatus without enlarging the external shape of a box by using nitrogen gas at specified pressure for insulating gas. CONSTITUTION:Nitrogen gas 9 is charged at about 5 atmospheric pressure inside a sealed box which has accommodated high-voltage electric apparatuses such as a vacuum breaker 2, disconnectors 3A and 3B, etc., so reinforcing plates 10 is bonded to the insides of the top, side plates, and the back plate. Gas insulation breakdown strength equivalent to or higher than sulfur hexafluoride gas at atmospheric pressure can be gotten by charging nitrogen gas 9 at about 5 atmospheric pressure this way Hereby, the insulation property of the accommodated electric apparatus can be maintained without enlarging the external form of the box 1.</p> |
