250 results about "Flashover voltage" patented technology

An insulator which can improve the electrical strength of external insulation relates to a line, a pillar and a bushing insulator with high electrical strength. An upper barrier and a lower barrier are arranged on an upper electrode and a lower electrode of the insulator, a middle barrier is arranged at the outside of an cascading electrode of the insulator string, an upper ring barrier and a lower ring barrier are externally arranged on an upper equalizing ring and a lower equalizing ring of the insulator, and an iron tower barrier and a transmission line barrier are arranged nearby an iron tower and a transmission line close to the insulator. The invention arranges one or multiple barriers, which can improve the strength of external insulation of the insulator, between the two electrodes of the insulator, changes the double-element structure of traditional insulators into a three-element structure, namely consisting of three parts of electrodes, insulators and barriers. The barrier stops moving charge entering from an area to another area, thus easing the area with electrical field distribution in a tense state, obviously enhancing the initial corona voltage and flashover voltage of the insulator, reducing radio interference and the power consumption of high-voltage transmission lines and relieving the deterioration of the insulator.

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.