Abstract: An overhead power line insulator is provided including a device for detecting and measuring a leakage current and for transmitting data, the device being arranged in such a manner as to perform: measuring a leakage current of an insulator during a first measurement period and during a second measurement period in a measurement circuit; comparing two values of the current that are obtained during respective ones of the two measurement periods; and stopping the measurement circuit for a certain sleep period of time if the second value of the current is less than or equal to the first value of the current, and then starting the measurement circuit again after the certain sleep period of time.

Abstract: An overhead power line insulator is provided including a device for detecting and measuring a leakage current and for transmitting data, the device being arranged in such a manner as to perform: measuring a leakage current of an insulator during a first measurement period and during a second measurement period in a measurement circuit; comparing two values of the current that are obtained during respective ones of the two measurement periods; and stopping the measurement circuit for a certain sleep period of time if the second value of the current is less than or equal to the first value of the current, and then starting the measurement circuit again after the certain sleep period of time.

Abstract: A method of manufacturing an electrical rod insulator for supporting an electrical conductor and comprising an insulating core obtained by molding and having a top end and a bottom end with a bore for receiving said rod in an axial direction, and covered in a molded covering having a groove for supporting said electrical conductor, wherein the core is molded in such a manner that its outside surface defines radial ribs extending along the axial direction from the top end of the core, said ribs being spaced apart from one another by a distance that is constant and substantially equal to the thickness of the core. The method makes it possible to avoid problems associated with molding large thicknesses when making a composite insulator having better mechanical and electrical properties at low cost.

Abstract: A method of manufacturing an electrical rod insulator for supporting an electrical conductor and comprising an insulating core obtained by molding and having a top end and a bottom end with a bore for receiving said rod in an axial direction, and covered in a molded covering having a groove for supporting said electrical conductor, wherein the core is molded in such a manner that its outside surface defines radial ribs extending along the axial direction from the top end of the core, said ribs being spaced apart from one another by a distance that is constant and substantially equal to the thickness of the core. The method makes it possible to avoid problems associated with molding large thicknesses when making a composite insulator having better mechanical and electrical properties at low cost.

Abstract: The lightning arrester assembly for an overhead line for transporting electricity comprises a lightning arrester connected in series with a horned spark-gap between the electricity transport line and a support structure in the form of an arm of a pylon connected to ground. The assembly also includes a device for flagging a malfunction of the lightning arrester, which device is connected in series with the lightning arrester on one of the horns of the spark-gap.