| 摘要 |
The insulator, e.g. for a contact breaker, is made from a cylinder (1) of epoxy resin with outer annular ribs (3) of the same material, and a covering (6), of a material such as silicone or EPDM, which is able to withstand the electrical gradient in atmos. conditions. The cylinder is made by moulding, with a seal (5a, 5b) between each support and the cylinder. In variants of the design the cylinder can be made by winding or coiling. The covering layer (6) is made, for example, in the form of a sleeve of thermo-shrink silicone which is placed over the ribs and then heated to shrink it into place. In variants it can be overmoulded or sprayed onto the cylinder. |
