64results about How to "Increase the flashover voltage" patented technology

Provided is an insulator capable of reducing lightning stroke flashover accidents. At least one lower bar-shaped electrode system is arranged at the lower electrode of the insulator, at least one upper bar-shaped electrode system is arranged at the upper electrode of the insulator, the electrode of the lower bar-shaped electrode system and the electrode of the upper bar-shaped electrode system are made of metal or conductive composites, the conductive composites are conductive rubber or conductive plastics, semiconductor layers or insulating material layers are arranged outside the lower bar-shaped electrode system and the upper bar-shaped electrode system respectively, the axial depth of the lower bar-shaped electrode system along the insulator is larger than the axial depth of a lower grading ring at the grounding side, and the axial depth of the upper bar-shaped electrode system is larger than the axial depth of an upper grading ring at the high-voltage side. By utilizing the electrode parts of the novel electrode systems, the density of power lines at the lower grading ring and the upper grading ring is reduced, the electric field near the lower grading ring and the upper grading ring is weakened, and the flashover voltage of the insulator is improved. The electric field is adjusted by utilizing the semiconductor layers or insulating material layers outside the electrode systems, and the lightning stroke flashover accidents of the insulator are further reduced.

A piezoelectric component comprises a parallelepipedal basic body made of piezoelectric material which has an input region and an output region at opposite longitudinal ends of the basic body. Furthermore, the piezoelectric component comprises first and second primary electrodes which are arranged inside the input region and first and second secondary electrodes which are arranged inside the output region. The primary electrodes are at a greater interval from longitudinal lateral faces of the basic body in a subregion which faces the output region than in the subregion which is remote from the output region. Likewise, the secondary electrodes are at a greater interval from the longitudinal lateral faces of the basic body in a subregion which faces the input region than in a subregion which is remote from the input region.

The invention discloses room-temperature type power insulator anti-fouling flashover paint, a preparation method thereof and a power insulator. The paint comprises a hard paint and a room-temperature curing agent, wherein the hard paint comprises the following components: resin with hydrophobic migrating performance, silicone acrylic resin, a solvent and a leveling agent; and the room-temperature curing agent comprises the following components: a catalyst and ethyl orthosilicate. Compared with the prior art, the paint has excellent hardness, a self-cleaning property, hydrophobicity and curing performance.

The invention discloses a device and a method for processing surfaces of a basin-type insulator by means of glow discharge fluorination. The method comprises the steps of: cleaning and drying the basin-type insulator, placing the basin-type insulator in a sealed cavity body, and connecting upper and lower parts of the basin-type insulator with two electrodes; vacuumizing the sealed cavity body by utilizing a vacuum pump, and filling the cavity body with low-pressure SF6 gas; and adjusting power-frequency voltage amplitude applied on the electrodes so as to produce glow discharge of the SF6 gas, utilizing a current meter for recording a current value of a loop, and utilizing plasma generated by the glow discharge for carrying out fluorination processing on the surface of the basin-type insulator for a period of time. The device and the method adopt the SF6 glow discharge plasma for carrying out fluorination processing on the surface of the basin-type insulator, the discharging current is small, the voltage amplitude is low, the basin-type insulator cannot be damaged, and the surface flashover voltage of the basin-type insulator can be greatly increased in a short time; and the device and the method have the advantages of being simple in operation, safe and efficient, low in cost and the like.

The invention relates to an insulator with a combined type barrier. The combined type barrier is arranged on an insulating body or an electrode of the insulator, or a part of the combined type barrier is arranged on the electrode and the other part of the combined type barrier is arranged on the insulating body. The combined type barrier consists of a general barrier and a plurality of auxiliary barriers, wherein the center of the general barrier is provided with center holes with different inner diameters, the upper surface and the lower surface of the general barrier are provided with annular grooves with different radiuses for installing the different auxiliary barriers, and the side surface of the general barrier is provided with holes with different radiuses for installing the different auxiliary barriers. The insulator solves the problems that mould manufacturing and an insulator with a three-element structure are difficult to generalize in the original patent and patent application of the applicant, the manufacturing and installation of the barrier are facilitated, few combined type barriers can be used for meeting the insulators of different types, insulating materials and voltage classes, the insulation and creepage distance of the insulator are increased, and the flashover, wet flashover and pollution flashover voltages are improved so as to be beneficial to the generalization of the insulator with the three-element structure.

Disclosed is an ultra-high voltage electroceramics external-insulation lead-out bushing, which can be applied to such a device as an ultra-high voltage GIS, a tubular busbar and a circuit breaker. The bushing comprises a ceramic bushing, a grounding flange (1) and a conductive rod (3) arranged in the centre of the ceramic bushing. A cylindrical grounding electrode (4) is provided between the conductive rod (3) and the grounding flange (1). The ceramic bushing at least has two adjacent sub-bushings (5, 6). The sub-bushings (5, 6) are fixed to each other as a whole via a transition member (7). A cylindrical intermediate electrode (8) penetrating the sub-bushing (6) therebelow is provided between the grounding electrode (4) and the conductive rod (3). The intermediate electrode (8) is isolated from the grounding electrode (4) and the conductive rod (3). This solution can significantly improve the electrical performance of the bushing, and in particular, improve the wet flashover voltage, the bending strength, etc. of the bushing, while reducing manufacturing difficulties and manufacturing costs of the ultra-high voltage ceramic bushing.