38results about How to "Prevent creepage" patented technology

The invention discloses a barrel-type composite insulating material insulation performance testing device, which includes a constant temperature box and an electrode system. The constant temperature box is provided with a heating tube and a temperature sensor. The electrode system includes a high-voltage copper rod electrode and a ground electrode; the high-voltage copper rod electrode is a cylinder. The body copper electrode is located inside the barrel-type composite insulating material. The cylindrical copper electrode is two semi-cylindrical copper electrodes cut along the diameter; the upper surface of the cylindrical copper electrode is tapped into the upper copper rod, and the lower surface is tapped Screw in the lower copper rod; the ground electrode is close to the outer wall of the barrel-type composite insulation material; the upper copper rod is connected to the high-voltage terminal to the partial discharge detector or voltage measuring instrument, and the ground electrode is connected to the low-voltage terminal; the partial discharge detector or voltage measuring instrument will collect The received voltage data is sent to the computer. The invention can ensure that the electrode and the insulating material are tightly bonded, and prevent air gap discharge caused by gaps between the electrode and the insulating material and creepage of the insulating material along the radial direction.

The invention provides a cable outer sheath thermal shrinkage patching method. Specifically, a graphitic layer on the damaged part of a cable outer sheath is scraped off and smoothened through a glass sheet, the section with the damaged part of a cable is wound and sealed through an insulating belt, the insulating belt is wrapped by a protection cover, and thermal shrinkage processing is carried out on the protection cover. According to the technical scheme, damage and water and humidity entering of the cable thermal protection cover can be effectively prevented, and the operation safety of the cable is improved.

The invention relates to the technical field of a flexible circuit board, in particular to a high-voltage flexible circuit board. The high-voltage flexible circuit board comprises an insulation base layer, wherein a first copper foil circuit layer is arranged at one side of the insulation base layer, a second copper foil circuit layer, a first PET film layer and a third copper foil circuit layer are sequentially arranged at the other side of the insulation base layer, a first through hole is formed between the first copper foil circuit layer and the insulation base layer to achieve the conduction between the first copper foil circuit layer and the second copper foil circuit layer, and a second through hole is formed among the first copper foil circuit layer, the insulation base layer, the second copper foil circuit layer and the first PET film layer to achieve the conduction between the first copper foil circuit layer and the third copper foil circuit layer. A positive electrode and a negative electrode of a traditional multi-layer circuit board are arranged at the same layer, and the widths of a positive electrode copper foil and a negative electrode copper foil are affected due to limitation of creeping distance; and the electrodes of the multi-layer circuit board are arranged at several layers, creepage between the electrodes can be prevented, the width of the circuit board is reduced to the greatest extend on the condition that the voltage drop is consistent with that of a dual-layer circuit board, and a higher cooling effect also can be achieved.

This invention relates to one oil dipped reversed current mutual-inductor, which comprises one conductor bar, shell, second coil set, cover tube, expansion device and oil valve, wherein, the conductor bar passes the inner shield; the second coil set stretches outside shell to form the device; the shell, cover tube, base socket form sealed part full of isolation oil; inner shield, second wire tubeare covered with total isolation materials; the total isolation materials covering the inner shield and secondary wire for isolation.

The invention discloses a hydro-generator three-phase high-capacity alternating-current collecting ring device. According to the device, a shunt ring is adopted to reduce heating when currents flow through the collecting ring device, collecting rings of the special cooling structure are adopted to enhance cooling, the collecting rings are prevented from overheating to cause accidents, and the device is very suitable for being used on a variable-speed hydro-generator. The device comprises the collecting rings, hollow conductive rods, the shunt ring, a fixing nut, a shaft insulating ring and the like, wherein the collecting rings are arranged on a top shaft of the generator. The device is composed of the three collecting rings so that a three-phase alternating current power supply can be connected conveniently, and each collecting ring is provided with two hollow conductive rods which penetrate through the top shaft of the generator and are connected with an excitation copper bar of an inner cavity. The three sets of hollow conductive rods are arranged on three different axial sections in the top shaft respectively, and are evenly distributed according to circumferential 120 degrees, installation space in the top shaft is enlarged, vibration caused by asymmetric weight in a rotating process of a unit is also eliminated, and operation stability is improved.

The embodiment of the present application discloses an insulating and heat-conducting device applied to high-voltage optical communication equipment, including: a bracket, a cover plate, a plurality of connecting posts, and at least one ceramic insulating tank for installing power devices. One ends of the plurality of connecting columns are jointly fixed on the cover plate, and the other ends are jointly fixed on the bracket. In the embodiment of the present application, a bracket, a cover plate, a connecting column and a ceramic insulating tank are used to jointly constitute the installation structure of the power device. The ceramic insulating tank is the main equipment of the structure, using a new high-performance ceramic material, which has good machinability, high material strength, high thermal conductivity and insulation performance. Encapsulate the power device inside the ceramic insulating tank, which can achieve electrical isolation and heat conduction at the same time. It can not only prevent the power device from discharging and creeping to the external conductor when it is working, but also use the copper seat to conduct the heat emitted by the power device to the ceramic insulating tank. and conduct to the outside world through the ceramic insulating tank to realize heat dissipation.