An insulator of the cap/pin type for an aerial electrical line comprises a dielectric element that has an outer surface in the form of a skirt that is extended by a metal cap on one side and a metal pin on the other side. It also comprises a mechanical load detection device comprising at least one strain gauge fastened to the metal cap of the insulator so as to be used to detect mechanical stresses representative of a mechanical load exerted on the electrical line.
A grade of ductile cast iron having a tensile strength (Rm) equal to or greater than 700 MPa, an elongation at break equal to or greater than 11%, a yield strength (Rp0.2) equal to or greater than 532 MPa, and a minimum ratio of yield strength (Rp0.2) to tensile strength (Rm) of 76% in a tensile test performed on a specimen taken from a tensile bar in accordance with standard EN 1563 and having a diameter of 25 mm and a length of 200 mm.
An insulator of the cap/pin type for an aerial electrical line comprises a dielectric element which has an outer surface in the form of a skirt and which is extended by a metal cap (4) on one side and a metal pin on the other side. It also comprises a mechanical load detection device comprising at least one strain gauge (C) fastened to the metal cap (4) of the insulator so as to be used to detect mechanical stresses representative of a mechanical load exerted on the electrical line.
0.20.20.2) to tensile strength (Rm) of 76% in a tensile test performed on a specimen taken from a tensile bar in accordance with standard EN 1563 and having a diameter of 25 mm and a length of 200 mm.
The invention relates to a grade of ductile iron having a tensile strength (Rm) equal to or greater than 700 MPa, an elongation of 8%, a yield strength (Rp 0.2) equal to or greater than 532 MPa, and a minimum ratio of yield strength (Rp 0.2) to tensile strength (Rm) of 76% in a tensile test performed on a specimen taken from a tensile bar in accordance with standard EN 1563 and having a diameter of 25 mm and a length of 200 mm.
Method for packaging electrical insulators (4) for high voltage or very high voltage, such as electrical line insulators made with a dielectric material chosen from glass or porcelain, and more specifically, electrical insulators with a protective hydrophobic silicone elastomer coating covering the surface of the electrical insulators, under vacuum or under inert gas.
B65B 31/04 - Mise sous vide, sous pression ou sous gaz spécial, des réceptacles ou emballages pleins, au moyen d'ajutages par lesquels on envoie ou on retire de l'air ou d'autres gaz, p. ex. un gaz inerte
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.
An overhead power line insulator comprises a dielectric element (4) having an outside surface forming a skirt (5) with a head extended by a metal attachment fitting (7) for attaching the insulator, and a device for detecting surface leakage current flowing on the dielectric (4), the device comprising a conductive ring (8) that surrounds the fitting (7) and that is in contact with the outside surface of the dielectric (4). An electrically insulating protective element (10) is provided in the form of a collared bushing that surrounds the fitting (7), being interposed between the ring (8) and the fitting (7) and extending radially so as to overlie the ring (8) in order to protect it from environmental pollution.
H01B 17/00 - Isolateurs ou corps isolants caractérisés par la forme
G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive
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