摘要:
An arrester has a plurality of laminated columns arranged in parallel, each having a plurality of nonlinear conduction elements. The columns are electrically interconnected by conductive connection members so that a conduction path is defined by the conduction elements and the connection members. The columns are arranged around, and in contact with, an insulating support column, which provides mechanical strength for the arrester. A plurality of such arresters may be arranged in an array, the arresters being interconnected by further insulating support columns. The laminated columns also contain insulating spacers and the spacers of two or more laminated columns may be rigidly interconnected. The arresters may be mounted in a casing filled with an insulating gas.
摘要:
Provided is an arrester excellent in a limit voltage characteristics which can withstand a contamination phenomenon of a porcelain bushing surface, and a surge absorption. Metal plates each having a thickness greater than a zinc oxide element portion does using high withstand voltage zinc oxide elements are arranged to suppress a rise in temperature of the zinc oxide elements. By employing the above means, it is possible to realize an arrester capable of suppressing a rise in temperature of the zinc oxide elements and which is low in a limit voltage and has higher performance.
摘要:
In order to provide an arrestor for a gas insulated switchgear in which the voltage share rates of respective zinc oxide non-linear resistance elements are made uniform, in an arrestor constituted by a plurality of columns for a gas insulated switchgear, the thickness or the capacitance of insulator spacers contacting the high voltage terminal or the ground terminal in respective columns is controlled, whereby the potentials of the zinc oxide non-linear resistance elements close to the high voltage terminal or to the ground terminal in the respective columns are shifted close to the potentials of the high voltage terminal or the ground terminal.
摘要:
A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains of zinc oxide between the individual crystal grains and which has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller resistance-temperature coefficient, and a small percent change in resistivity after heat treatment at 500.degree. C. in the atmosphere.
摘要:
A lightning arrester comprises a plurality of column blocks disposed in parallel each of which has groups of a number of stacked nonlinear resistance elements and spacers interposed between the element groups, in which the element groups of the blocks are electrically connected in series by jumper conductors so as to form a series resistance and the spacers are formed of nonlinear resistance elements which can absorb energy, so that the arrester, as a whole, can absorb a larger amount of energy.
摘要:
A tank-type surge arrester includes a zinc oxide element unit having zinc oxide elements, a top shield ring for earth insulation control disposed on top of the zinc oxide element unit, an upper shield ring disposed below the top shield ring in an upper section of the zinc oxide element unit, an expanded lower shield ring disposed below the upper shield ring in the upper section of the zinc oxide element unit, and tubular conductors disposed between the upper and the lower shield rings so as to be included in a vertical plane on an extension of a high-tension conductor.
摘要:
A mounting construction of a tank-type lightning arrester for a neutral point of a transformer includes a transformer having a transformer winding contained within a transformer tank, the transformer winding having a neutral point, and a tank-type lightning arrester having an overvoltage protection element contained within a lightning arrester tank. A first opening is formed in an upper portion of a side surface of the transformer tank, and a second opening is formed in the lightning arrester tank, and the first and second openings are connected together through an insulating spacer having a central conductor, and the neutral point of the transformer winding is connected to the overvoltage protection element via the central conductor. The lightning arrester tank is supported solely by a mounting portion provided on a side surface of the transformer tank.
摘要:
A non-linear resistor having a high impulse withstanding ability is obtained by directly applying a crystallized glass to the side surface of a sintered body of a ZnO element, and then bake-attaching the crystallized glass to the side surface of the ZnO element by heat treatment. Since the impulse withstanding ability is improved by applying the crystallized glass as the side surface high-resistivity layer of the voltage non-linear resistor, the performance and reliability of an arrester including the resistor is improved.
摘要:
It is an object to provide a lightning arrester having machinery built-in in which an axial length of an insulating tube which stores therein zinc oxide elements is reduced so that an attempt is made for miniaturization. The arrangement is as follows. That is, a metal cap with an inclination portion 11 which is fixed to one end of the insulating tube 4 which stores therein the zinc oxide elements 5 is made to a dish shape which projects toward the anti-side of the zinc oxide elements, openings 11a are formed in the inclined portion thereof so that the inside and the outside of the insulating tube 4 communicate with each other, an insulating medium is circulated through the openings 11a while a sufficient gap L is formed between the one end of the insulating container 4 and a ground bracket 15, and the zinc oxide elements 5 are cooled by the insulating medium.
摘要翻译:本发明的目的是提供一种具有机械内置的避雷器,其中存储有氧化锌元件的绝缘管的轴向长度减小,从而试图进行小型化。 安排如下。 也就是说,具有倾斜部分11的金属盖被固定到存储有氧化锌元件5的绝缘管4的一端,其形成为朝向氧化锌元件的反侧突出的盘形,开口 11a形成在其倾斜部分中,使得绝缘管4的内部和外部彼此连通,绝缘介质通过开口11a循环,同时在一个之间形成足够的间隙+ E,uns L + EE 绝缘容器4的端部和接地托架15,并且氧化锌元件5被绝缘介质冷却。
摘要:
The grounding tank 2 is laid on its side in the state that the covers 7A and 7B of the openings 3A and 3B at the both ends thereof are removed and the truck 8 is turned so that the side frame 8b on the back of the truck 8 and the bottom 8a with the wheel 11 are reversely positioned so as to mount the divided arrester units 7A and 7B to the tank 2 and the cover 7A (7B) and each arrester unit 4A (4B) are mounted and fixed to the side frame 8Ab, 8Bb so that they can be mounted and removed in the integrated state. The cover 7A (7B) and each arrester unit 4A (4B) are lined up in a horizontal line at the same height as that of the openings 3A and 3B of the grounding tank 2 after the truck 8 is turned and returned to the normal posture. The arrester units 4A and 4B are inserted and set into the grounding tank from side by moving the trucks 8A, 8B and the covers 7A and 7B are removed from the truck 8A, 8B and mounted on the tank 2 side so that they close the openings 3A and 3B at the same time. Thereby, the simplification, labor saving, and safety of arrester assembly are promoted.