摘要:
A method for testing electric elements includes applying a first beam of particles to a first location of an electric element, to liberate electrons from the first location, and applying a second beam of particles to a second location of an electric element, with a temporal shift (Δt) different from zero in relation to the application of the first beam of particles, to liberate electrons from the second location. The temporal shift is on the order of magnitude of a propagation time of electrons between the first and the second location. Electrons liberated under the effect of the first and second beams of particles are collected, and at least one quantity of electric charges corresponding to the collected electrons liberated under the effect of the second beam of particles is measured and quantitatively or qualitatively deducing therefrom an electric feature of the electric element.
摘要:
An aerial cable installation having an aerial cable suspended from a suspension point through a suspension device. This device has a clamp having two saddle members engaging the cable on diametrically opposite sides thereof and a plurality of nut and bolt assemblies extending through aligned holes in flanges of said saddle members for resiliently biasing the saddle members toward each other to clamp against the cable with a selected clamping force. To this end, each nut and bolt assembly includes a helical spring mounted on the bolt thereof between said flanges and the nut of the assembly and the springs are compressed a predetermined amout which is adjustable by tightening or loosening said assemblies.
摘要:
The present disclosure provides a wildlife guard for electrical power equipment including a disc having a central opening for fitting onto the equipment. The disc includes an electrically insulating material with a conductive filler material in quantity sufficient for the disc to maintain an electrostatic charge. The disc has an insertion slot extending from an outer portion to the central opening for movement of the disc onto the equipment. The present disclosure also provides a wildlife guard for an electrical insulator bushing having an electrical conductor extending outwardly therefrom. The wildlife guard includes an electrically nonconductive cover for covering at least a portion of the electrical conductor, the cover being adapted to mount upon the bushing and a conductive panel attached to the cover.
摘要:
A mast clamp assembly including a strap, a drop wire clamp, and a hook. The ribbon-like strap forms a loop which engages a utility pole or mast. The drop wire clamp includes a clamp for clamping to the drop wire and a loop which engages the hook. The hook includes a back wall and first and second side walls. The loop of the drop wire is received in loop mounting slots in the side walls and engages a protrusion on each side wall. Each side wall also has a strap mounting opening having a triangular-shaped lower portion and a rectangular-shaped upper portion. The hook is mounted on the strap by inserting the strap, bottom edge first, through a slot in the back wall into the lower portion of the strap mounting openings and rotating the hook around the strap such that the upper edge of the strap rotates into the upper portion of the strap mounting opening and the strap engages the hook back wall.
摘要:
Flashover protection covers are provided in a continuous length for covering power line spans between supporting structures. A flexible panel includes an inner surface and generally parallel opposite edge portions configured to be joined together to form a first longitudinally extending chamber. A longitudinally extending first wall is connected along an edge portion thereof to the inner surface of the panel. The first wall has an opposite free edge portion and is configured to form a second longitudinally extending chamber within the first chamber. The second longitudinally extending chamber is configured to enclose a power line when the panel edge portions are joined together. A second wall is connected along an edge portion thereof to the inner surface of the panel and is configured to inhibit electrical arcing from the power line into the first chamber between the first wall free edge portion and the panel inner surface.
摘要:
A U-shaped universal ground assembly with oversheath protection for use in grounding a cable, the grounding clip having a ground `block` including a framework with a generally open end and a spaced closed end. The framework includes a pair of bifurcated leg members extending from the open end of the framework toward the closed end thereof. An arcuate toothed portion is formed as a lower grip member at the closed end of the framework, and an opposed upper grip member, slidably positioned on the framework, is adapted to be moved toward the closed end of the framework. The grounding block also includes a wire retainer pivotally and slidably supported on the open end of the framework and adapted to be moved into a generally closed position across the open end of the framework. At least one ground wire opening is defined in the framework, and at least one ground wire opening is defined in the wire retainer in substantial registry therewith.
摘要:
This invention pertains to a device for the automatic installation of aerial beacons on a cable. The device has magazines for the distribution of half-beacons (12a, 12b) and means (16) for putting into place and assembly on the cable of half-beacons (14) respectively distributed by the magazines in order to form the beacons. Accordingly to the invention, the device incorporates attachment means (20, 22) for suspending on the cable (18) and for moving along a cable in a movement direction (X), the means (16) for putting into place and assembly being placed on the device so as to install the beacons behind the attachment means with respect to the movement direction.
摘要:
A generally disc-shaped polymeric insulating article (14) is in two parts to fit around the core (4) of an insulator (2). A first part (22) of the article (14) is substantially C-shaped to fit around the insulator core (4), and the second part comprises an insert (30) that slidably engages the first part (22) so as to secure the article in place. The article (14) projects a substantial distance radially from the insulator (2) to prevent animals and the like, bridging the length of, and thus electrically short circuiting, the insulator (2).
摘要:
A line marker including hollow shell halves assembled about an elevated line and luminous tubes mounted on the shell halves illuminated by the electric field extending about the power line and without electrical connection with the power line itself.
摘要:
An apparatus and method for increasing electrical clearances on power lines to increase the conductor to structure clearance and insulation length and the conductor clearance to ground and other underlying objects. The apparatus may be applied live-line and can be installed without significantly modifying existing support structure. A suspension insulator string extends vertically from the tower and a yoke plate is connected to the bottom thereof. First and second insulator strings extend outwardly in opposite directions from the yoke plate with a dead end strain clamp attached to an outer end of each insulator string. The dead end strain clamp of each insulator string, dead ends the electrical conductor forming an upgrade loop therebetween. A post insulator is rigidly mounted on the yoke plate and extends from the yoke plate to the conductor upgrade loop intermediate to the outer ends of the first and second insulator strings. The apparatus is installed by either re-using an existing vertical suspension insulator string from the support structure or replacing it with a similar insulator string, and mounting the apparatus of the present invention on this vertical insulator string. The conductor is tightened on one side of the tower and the dead end strain clamp of the first insulator string is clamped to the conductor, and the conductor is then tightened on the other side of the tower and the dead end strain clamp of the second insulator string is clamped to the conductor forming the conductor upgrade loop therebetween.