| 摘要 |
<p>PURPOSE:To offer a current transformer whose constitution is simple by a method wherein both edge faces in the axial direction of a ring-shaped molded body in which an iron core and a secondary winding have been united and which has been formed by a resin molding operation are fixed and bonded to a flange face of a metal tank via a gasket. CONSTITUTION:A current transformer 70 is formed of a ring-shaped molded body 71 in which an iron core 3 and a secondary winding 4 have been united and which has been formed by a resin molding operation. A plurality of buried metal fittings 14 provided with screw holes 14A which are opened in the axial direction of the molded body 71 and to which mounting bolts 13 are fitted are buried at both end parts in the axial direction so as to be separated at regular intervals in the circumferential direction of the molded body 71. The mounting bolts 13 are fitted and inserted into the screw holes 14A via a flange 15A provided with a gasket 16; the mounting bolts 13 are fastened to fix and bond the molded body 71 to a metal tank 15. Consequently, an electric field at a resin molded layer of the current transformer 70 is reduced to 1/5 as compared with that in an insulating gas part; as a result, a shielding cylinder which is required in conventional devices is not required.</p> |
