639results about "Maintaining distance between parallel conductors" patented technology

The present invention relates to a surface modified overhead conductor with a coating that allows the conductor to operate at lower temperatures. The coating is an inorganic, non-white coating having durable heat and wet aging characteristics. The coating preferably contains a heat radiating agent with desirable properties, and an appropriate binder/suspension agent. In a preferred embodiment, the coating has L* value of less than 80, a heat emissivity of greater than or equal to 0.5, and/or a solar absorptivity coefficient of greater than 0.3.

A structural channel system (100) includes a main structural channel rail (102), cross-channels (104) and cross-rails (106). A modular plug assembly (130) couples electrical power and communication signals to connector modules (132, 140, 144) which, in turn, control application of power to application devices (939, 969) based on the communication signals.

A transmission line hanger is provided for attaching a corrugated transmission line to a supporting structure. The hanger includes a first section adapted to engage a first side of the transmission line and a second section adapted to engage a second side of the transmission line. The first and second sections define an inner generally cylindrical the gripping ribs forms a protrusion extending radially inward from the inner generally cylindrical surface. The gripping ribs are spaced to fit into corresponding recesses in the corrugated outer surface of the transmission line. In another embodiment, the hanger further includes a snap clasp having two elements. The first element is a lip on the exterior of the hanger. The second element is a latch having three sides. In still another embodiment, the hanger includes a first alignment pin and a first mating recess on the fist section and a second alignment pin and a second mating recess on the second section. The first recess being adapted to receive the second alignment pin and the first alignment pin being adapted to fit in the second mating recess to align the first section with the second section.

A power line de-icing apparatus which is installed onto a power line without the need for disconnecting the power line. A temperature sensor and an ice sensor on the apparatus automatically activate the de-icing mode of operation. An internal motor and drive wheel move the apparatus along the power line in both directions, one direction at a time. Heaters and chisels on the apparatus remove any ice on the power line in one direction at a time. Power for the apparatus is generated from the electrical power carried by the power line using transformers. Proximity sensors on the apparatus detect stopping devices placed on the power line to stop the motion of the apparatus.

A device for reducing a shock load having a longitudinal direction along a power line coupled through an insulator to a crossarm of a transmission tower, comprising: a rotary damper coupled between the insulator and the crossarm for rotating by the insulator in the longitudinal direction in response to the shock load, the damper having an axle to which the insulator is rotatably coupled; and, a torsion bar coupled at a first end to the axle and at a second end to the crossarm for resisting rotation of the insulator, whereby at least a portion of the shock load is absorbed.

A fastener for mounting elongated material, such as cables and wires, to a supporting structure includes a major body portion having an aperture for receiving elongated materials of various dimensions, and at least one anchor bore through which an anchor is inserted for securing the fastener to the supporting structure. The fastener also includes a prong that is engagable with the anchor for preventing the major body portion from slipping off the anchor. The fastener may include a flexible base member for receiving the elongated material, or the fastener may includes a wire tie slot through which a wire tie can be passed for holding multiple pieces of material in position. The method of installing the fastener includes securing the anchor to the supporting structure, and then sliding the major body portion, with the elongated material positioned within the aperture, onto the anchor.

The invention provides an intelligent circulation anti-icing method which can be applied to two to twelve and more split lead power transmission lines to transmit current. The method can be applied to any icing tension line section of a power transmission line and can accurately judge whether the icing prevention needs to be started or not automatically according to the line icing condition to realize the automation and the intellectualization of the whole anti-icing process. The method comprises the following steps of: mounting a control device; detecting the environmental parameter and judging whether the current environment needs to start the icing prevention or not by the control device; grouping sub-leads of the split lead; and when the anti-icing operation needs to be started, sequentially converging currents of all split leads at the transmitting end of the anti-icing section on each group of sub-leads according to preset interval time by the control device. The invention increases the transmission current of the sub-leads, achieves the aim of icing prevention by joule heat and can realize the automation and the intellectualization of the local or whole anti-icing process without adding an ice thawing power supply and the icing detection on the line and damage the icing condition before the generation of ice.

A method and an apparatus for de-icing aerial cables are provided. The cable is gripped and slowly twisted for a predetermined number of turns within the elastic domain of deformation of the cable. Mechanical elastic energy is therefore accumulated in the cable. The cable is then released and untwisted under the spring back effect, releasing the energy accumulated therein which breaks and shakes off the ice accumulated on the cable.

A universal cable hanger or clamp that can accommodate a variety of cable sizes, and can be mounted on a variety of structures in a various ways. The hanger comprises a fixed block with a movable block, where the fixed block can be clamped or attached to a fixed structure, and comprises a pair of partially open curved sections adapted to receive and hold cables of various sizes. The movable block comprises two curved or V-shaped or U-shaped arms that correspond to the partially open curved sections. As the movable block is inserted into the fixed block, the arms close off the curved space, in whole or in part, to grip and hold a cable in the space. Two posts on the movable block engage indentations in slots on the fixed block, thereby providing a curved space of fixed size corresponding to different cable sizes. Multiple hangers can be stacked.

A security cover for selectively securing an access opening in an enclosure or a utility pole using a padlock with a shackle. The security cover includes a rigid cover, that substantially covers the access opening and has a lock-bar opening formed therethrough. A shroud is fixed about the lock-bar opening on the exterior surface of the rigid cover, and the shroud has an access port for enabling insertion of the padlock between the shroud and the exterior surface of the rigid cover. A lock-bar extends through the lock-bar opening in the rigid cover while the clamp-bar is engaged with the interior of the enclosure. The shackle-hole is accessible through the access port of the shroud.

The invention relates to a cable isolating and fixing device and a tower tube. The cable isolating and fixing device comprises a support ring, a plurality of flexible support bars and a plurality of cable installation assemblies, wherein the support ring comprises a through hole and a ring body enclosing the through hole; the ring body comprises an inner surface and an outer surface; the plurality of flexible support bars are arranged on the support ring at intervals; each flexible support bar is provided with opposite connection end and free end; each connection end is connected to the ring body and each free end extends away from the ring body; each flexible support bar has self-support property and predefined buffer deformation force; and the cable installation assemblies are arranged at the free ends of the flexible support bars respectively and are used for installing one or more cables. According to the cable isolating and fixing device, protection can be formed on the cables and the cables can be prevented from being twisted together.

A cable termination device of the dry type, for terminating a high voltage cable, including an insulator housing with a first end and a second end and having a hollow interior, and which second end has an opening for insertion of a high voltage cable. The cable termination device further includes a stress controller device located inside the insulator housing and adapted to be mounted on a high voltage cable, an end cap located at the first end of the insulator housing and provided with an external electrical connection means, and an electrically insulating gel filling at least part of the hollow interior of the insulator housing and surrounding at least part of the stress controller device. Further, the stress controller device is provided with a first and a second deflector arrangement for controlling an electric field.

The invention discloses an energy-feed composite anti-galloping energy dissipation spacer comprising a body, wherein a cavity is formed inside the body; an excitation coil is mounted on the inner sideof the body; a metal clamp is arranged on the outer side of the body; a first insulating layer is arranged between the excitation coil and the body for insulation; a ring barrel filled with a magnetorheological fluid is arranged in the inner ring of the excitation coil; a metal ball which can roll in the ring barrel is arranged in the ring barrel; a plurality of piezoelectric generating units areinstalled at intervals on the inner ring of the ring barrel along the circumferential direction; pressure sensors is disposed at the two ends of each piezoelectric generating unit; the piezoelectricgenerating unit is connected in series with an electric energy extraction and storage unit, a controller and the excitation coil to form a closed loop; the inner ring of each piezoelectric generatingunit is provided with a second insulating layer; and an electromagnetic particle vibration absorption body is disposed on the inner side of the second insulating layer.

The invention relates to a method for suppressing the dancing and the alternate flashover of a single-lead transmission line, belonging to the field of electrical failure prevention and control of transmission lines. The method comprehensively considers the influences of all stages of waveforms while the transmission line dances and proposes a method for mounting alternate spacers on a cross section vertical to the lead in a staggering way; and compared with the traditional method for mounting the alternate spacer, the method of the invention can better prevent dancing and suppress alternate flashovers.

The invention relates to a damping device for inhibiting the windage yaw of transmission line insulators, which is characterized by comprising a cylinder, a two-way piston, a spring, hinge seats, a protective sleeve, and an insulating damping medium. The two parts of the two-way piston arranged at an interval are disposed in the cylinder and in sliding fit with the cylinder. The two parts of the two-way pistons are connected by the spring arranged in the interval. The piston rod ends of the two-way piston are equipped with the hinge seats. The cylinder is filled with the insulating damping medium. The two-way piston is provided with damping holes for the insulating damping medium to circulate. The damping device is connected with an insulator and a cross arm through the hinge seats at the piston rod ends. The damping device has the advantages of simple structure, convenience of installation and maintenance, high strength, high elastic modulus, good shock absorption performance, resistance to high and low temperature, corrosion resistance, good insulation property, and long service life. When in use, the damping device is installed between the insulator and the cross arm of a transmission line. The damping device can absorb the vibration impact of strong wind to the insulator, avoid flashover of the transmission line caused by windage yaw, and ensures safe and stable operation of the transmission line.

The invention discloses a quadrifid insulated damping conductor spacer matched with a hot-line de-icing scheme of a transmission line, which is realized by frameworks and a line clamp main body, wherein the frameworks are made of glass fiber reinforced plastics, consist of lug boss type positioning stop blocks and are symmetrically arranged close to the inner side outside each connecting hole on the inner side of a rectangular framework, and the line clamp main body consists of a line clamp with a connecting joint. The quadrifid insulated damping conductor spacer not only can reliably separate and support a quadrifid conducting line, but also has good insulating effect so as to ensure that four conducting lines are mutually insulated, thereby creating necessary conditions for the hot-line de-icing of the transmission line, avoiding the harm brought by ice and snow disasters and increasing the bearing strength of the conductor spacer. Because of the improvement on a positioning structure, the line clamp main body and a rubber block, the centripetal force of the conductor spacer can be increased at the same time of simplifying the structure so as to ensure that a damping joint moves along the conducting line all the time and guarantee that the conducting line has damping effect and good positioning when being moved within any possible ranges. The quadrifid insulated damping conductor spacer has simple structure, easy manufacture, reliable performance, low manufacturing cost, economy, practicality and convenient mounting and is suitable for popularization and ice coating areas.