Two transmission-line problems¿suspension insulators for industrial areas in Great Britain; conductor vibration

The paper deals in an introductory manner with two transmission-line problems on which very little matter has previously been published. These problems are:¿ (1)The design of suspension insulators for use in industrial areas in Great Britain 2 The vibration of overhead transmission-line conductors. Part 1 outlines the troubles which have been experienced due to dirt desposits on suspension insulators on the Newcastle-upon-Type Electric Supply Co.´s 66-KV system, and the methods so far adopted for limiting the extent to trouble. Emphasis is laid on the nature of the distribution of dirt deposits on insulator surfaces, as demonstrated by experience, and on the importance of the shapes of insulators from this point of view; the standard type of suspension insulator appears to be far from ideal for such conditions. Proposed new types of insulator, which are to be tried out in practice, are described, and future lines of experiment and research are indicated. Part 2 discusses briefly:¿ (a) The causes of conductor vibration. (b) The Phenomena fo energy supply to, and transmission and dissipation of energy along, a vibrating conductor. (c) The injurious effects of vibration. (d) The design of conductor clamps and fittings from the point of view of eliminating or reducing the injurious effects of vibration. (e) Special devices for eliminating or reducing the injurious effects of vibration or for preventing or liminting vibration itself. (f) A brief summary of the fields for future invesigation and research.