| 摘要 |
<p>PURPOSE:To reduce the external size by providing a U-shaped electric field relaxation section to a central conductor provided to a main circuit disconnecting section and by further providing a contact section inside to increase a withstand value between a bulkhead and the main circuit disconnecting section. CONSTITUTION:On the left end of a central conductor 17 in an approximately T-shaped insulator 18 cast-moulded with epoxy resin, an electric field relaxation section 17 U-shaped in a cross section is provided with the opening side on the left. The inside of the opening end side is two-stepped and the outside circumferential end 17b is chamfered in a semicircle. To the outside circumference of a cylinder section in the center of the left end of a central conductor 17 a groove 17c semicircular in a cross section is provided all over the circumference. A contact section internally protruded semicircularly to the rear end of a finger 15 fitted in plural rows on the outside circumference of the cylinder section is fitted into this groove 17c, while to the semicircular recessed section provided on the outside of the finger 15, forward and backward, a coil spring 15a is wound over.</p> |
