JP2016536759A - Multi-electrode corona ring-arrester - Google Patents

Abstract

A corona ring arrester intended to flatten the electric field while at the same time protecting the electrical equipment or the elements of the transmission line from lightning is claimed. The corona ring arrester (20) has an insulator body (2) configured to be mechanically attached to an electrical device or a power line element. The shape of the insulator body (2) is such that an air gap is provided between the insulator body and the element of the electrical device or power transmission line to at least partially surround the element of the electrical device or power transmission line. Make sure. An insulator body (2) is disposed between two main electrodes (4, 9) mechanically connected to the main electrode (4), and the main electrode (4, 9) and the intermediate electrode ( There are two or more intermediate electrodes (5) configured to generate an electrical discharge during 5) and between adjacent intermediate electrodes (5).

Description

  The invention relates to an electrical device, in particular an insulator and an insulation string, for protecting arc discharge and / or corona discharge and / or for protective attachment for equalizing the voltage distribution on the insulator or insulator string. About. The invention further relates to an arrester for the protection of overvoltages caused by lightning of electrical devices. Such a device makes it possible to protect not only electrical devices but also high-voltage installations, insulators and other elements of the transmission line.

  International application WO 201082861 shows an arrester for the protection of an electrical device or transmission line element, which arrester is configured to be mechanically attached to the electrical device or transmission line element. Two main electrodes mechanically coupled to the insulator body, and mechanically coupled to the insulator body, disposed between the main electrodes, between the main electrode and an adjacent intermediate electrode; and It has two or more intermediate electrodes configured to promote discharge between the intermediate electrodes.

  This known arrester has been successful in protecting against lightning discharges. However, it is impossible to make the voltage distribution on the insulator linear body uniform or to make the electrolytic strength uniform along the synthetic resin insulator. Therefore, it cannot be protected from corona discharges of electrical devices or power transmission line elements.

  The object of the present invention is reliable and inexpensive to manufacture, ensuring protection against overvoltage phenomenon due to lightning lightning of the elements of the electrical installation or of the transmission line, and of the elements of the electrical installation or transmission line to which the device is attached. An object of the present invention is to provide an apparatus capable of improving the distribution of electric field strength around. In other words, an object of the present invention is to provide an apparatus that combines the characteristics of arresters and corona ring.

  The above object of the present invention is to provide an insulator body that is configured to be mechanically attached to an element of an electrical device or transmission line and ensures at least partly enclosing at least one element of the electrical device or transmission line. This is achieved by the arrester of the electrical device or the elements of the transmission line. The arrester further includes two main electrodes mechanically connected to the insulator body, mechanically connected to the insulator body, and disposed between the main electrodes along the insulator body. It has two or more intermediate electrodes configured to form a discharge between the main electrode and the adjacent intermediate electrode and between the adjacent intermediate electrodes. The enclosure of the electrical device or power line element by the insulator body is ensured by the gap between the insulator body, the arrester electrode and other elements, and the electrical device or power line element at the encapsulated position. It is supposed to be.

  In one embodiment, the circular or spherical portion where the insulator body ensures the enclosure of the electrical device or power line elements is 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 Includes ranges of °, 240 °, 270 °, 300 °, or 360 °.

  In a preferred embodiment, the at least one main electrode has a tap that protrudes or extends from the surface of the insulator body. The intermediate electrodes are preferably arranged offset from each other along at least the insulator body. In a preferred embodiment, the arrester has a securing means for providing a means for attachment to an electrical device or transmission line element.

In one embodiment, a discharge chamber is provided between the intermediate electrode and the main electrode and / or the intermediate electrode. In another embodiment, the intermediate electrode is covered with an insulating layer, and the discharge chamber appearing on the surface of the insulating layer is disposed between adjacent intermediate electrodes.
In such a case, the main electrode is at least partially covered with an insulating layer, and the discharge chamber appearing in the insulating layer is provided between the intermediate electrode and the main electrode.

  In a preferred embodiment, the bending stiffness coefficient of the insulator body is 1 N / m, 10 N / m, 25 N / m, 50 N / m, 75 N / m, 100 N / m, 200 N / m, 300 N / m , 400N / m, 500N / m or less than 1000N / m.

  The object of the invention is also a transmission line comprising a pole having an insulator, at least one hot wire connected to the insulator by a fixture, and at least one arrester for protecting an electrical device or an element of the transmission line. Achieved by: The characteristic of such a transmission line is that the arrester used therein can be applied as any arrester in the above-described embodiment. The arrester can be installed by means of attachment, and the discharge voltage between the main electrode and the intermediate electrode is preferably made smaller than the discharge voltage between the main electrode and the elements of the electrical device or transmission line.

  The effect of this achieved technology is that an arrester that protects an electrical device or transmission line element against lightning discharge also improves the electric field structure around that element and therefore serves as a corona ring. It is to reduce the cost for providing electrical insulation or reliability of transmission line operation. This means that the corona ring arrester can be attached to any device, so that the electric field strength distribution around the elements of electrical equipment, transmission lines, electrical insulators, or insulator strings that are to be protected from lightning. It makes it possible to avoid additional equipment for improvement. A further technical effect is to provide a lightning protection device that can be easily provided on a transmission line or an electrical insulator.

  Furthermore, the technical effect of the present invention is that since the electrodes are usually provided on the outer surface of the corona ring away from the element to be protected, the corona discharge voltage generated on the surface of the corona ring is increased. As a result, since the electric field distribution in the space is further expanded, the electric field strength is reduced. If the corona ring has a lengthened inner metal conductor, this fact also reduces the chance that a corona discharge will occur due to the presence of an insulator layer on the corona ring metal core. The level of radio interference from the transmission line is significantly reduced. In addition, the combination of corona ring and arrester provides a single device (rather than two) that achieves the functions of corona ring and arrester, thus reducing the space required by these elements. It becomes.

  The invention is illustrated by the following drawings.

1 shows a first embodiment of an arrester according to the present invention. 2 shows a second embodiment of an arrester according to the present invention. 1 is an example of a transmission line comprising a corona ring-alester according to the invention provided on a polymer insulator. FIG. 4 is an example of an apparatus for determining a bending strength factor of an arrester dielectric element in an initial state. FIG. A device for determining the bending strength factor of an arrester dielectric element when a bending force is applied. Similar elements are denoted by the same reference numerals, and elements denoted by reference numerals in one drawing are omitted in the other drawings.

  FIG. 1 shows a first embodiment of an arrester according to the present invention. The arrester for protecting the electrical device or transmission line element is made in the form of a corona ring for uniform electric field strength around the electrical device or transmission line element (ie in the vicinity of the element). The arrester as a whole is made of a rigid dielectric that is adapted to be mechanically attached to or adjacent to an electrical device or transmission line element. This attachment is performed by various methods, for example, depending on the shape of the insulator main body at the attachment position such as linear, curved, annular, or spiral. Furthermore, the insulator body can be provided with protrusions / recesses / holes for providing a fitting portion that uses a fitting fastener or a fitting portion with a part of an element of an electric device or a transmission line. In the particular embodiment of FIG. 1, the arrester has two ends with an indentation 3 that is used to attach the arrester to an electrical device or transmission line element. The two ends are fixed to each other, that is, the elements of the electric device or the transmission line are held by elastic force. In another embodiment, the end of the insulator body is straight, while the electrical device or power line element has a fixing means to which the corona ring can be attached via its end 1. Yes.

  Preferably, the corona ring has sufficient mechanical strength (hardness). Mechanical strength (hardness) corona ring is necessary to keep the shape. The part of the corona ring that surrounds the electrical device or power line element will be suspended, so if the mechanical strength / hardness is insufficient, this part will tend to fall towards the ground, and thus corona ring Since the shape of the corona ring is different from a predetermined shape required for forming the desired electric field distribution, the desired electric field distribution cannot be formed (corrected). The strength / hardness of the corona ring is ensured by, for example, the mechanical strength of the elongated conductor and / or the insulating layer applied thereon.

  For example, according to an embodiment of the present invention, the insulator body has a reinforcing material in the form of a solid rod disposed along the inside of the insulator body, for example. This reinforcement is intended to give the corona-ring arrester the necessary strength, in particular to maintain the shape of the corona-ring arrester and to ensure the necessary strength of the device as a whole. This stiffener is formed of a dielectric, eg, a polymer element, and when attached, forces applied by gravity or by other elements of the transmission line (eg, inadvertent contact with the wire), wind and / or Or it provides the necessary resistance to deformation of the corona ring arrester due to rain, animals, birds, or other factors during storage or transport that could lead to deformation of the corona ring arrester. In other embodiments, if there is no electrical short between the intermediate electrodes, or preferably there is no electrical short between the reinforcing material and the intermediate electrode, the reinforcing material has sufficient strength and hardness. Can be made using a metal that can be secured.

  In another embodiment, the insulator body has an elastic member in the form of an elastic rod, for example, arranged along the insulator body, for example, inside the insulator body, according to one embodiment. This elastic member is intended to ensure the elastic properties of the corona-ring arrester, i.e., the force that restores its shape when the force that causes deformation of the corona-ring arrester is removed. This elastic member also makes it possible to reduce the deformation while the deformation force acts. The elastic member ensures the elasticity necessary to restore the shape of the corona-ring arrester when the deformation stress is lost and / or the elastic force necessary to reduce the amount of deformation while the deformation stress is applied. Can be made using both dielectric materials (eg, polymers) and metal materials. When the elastic member is made of metal, it is necessary to ensure that there is no electrical short between the elastic member and the intermediate electrode. In certain embodiments, the insulator body itself can ensure the required strength and / or elastic properties and / or the required hardness.

  FIG. 2 shows an embodiment of an arrester with means 7 for attaching to an electrical device or a power line element. This attachment means 7 is provided on a rod-like element introduced into the end of the insulator body 2 and is used for means of an electrical device or transmission line element (using bolts, screws, clamps or other joints). Can be gripped by 7 elements, thereby attaching a corona ring to the element. Such a simple mounting means of the arrester according to the invention provides a simple arrangement on the elements of the electrical device or transmission line.

  The insulator body 2 is configured to at least partially surround an electrical device or power transmission line element to which the insulator body is mounted, or for example a line passing along the power transmission line. This envelop is usually by means of the shape of the insulator body and / or such an insulator body so that its electrical devices or power line elements are surrounded by the insulator body at least within a part of a circle or a solid angle. This is achieved by the feasibility of placing on or near the elements of the electrical device or transmission line.

  At least a portion of the insulator body (and thus the entire corona ring) can be a circle / disk / ellipse / doughnut shape, or a part of a circle / disk / ellipse / doughnut shape, Consider that the protected element or, for example, the line passing along the protected element is located within a circle / disk / ellipse / doughnut shape or part of a circle / disk / ellipse / doughnut shape Is done. Furthermore, depending on the shape of the electrical device (ie the electric field distribution), at least a part of the insulator body (and thus the entire corona ring) can be a parabola, a hyperbola, or a quadratic or higher order curve with the required size. It can be.

  Furthermore, in one embodiment, the encircling is preferably performed in a plane perpendicular to the main longitudinal axis of the electrical device or power line element, but the angle between the direction and the plane is the other angle. (For example, 15 °, 30 °, 45 °, 60 °, 75 °, 85 °, or, for example, an angle within a range of 30 ° to 90 °), and the sieving is performed in a plane. Alternatively, it may be curved. When the enclosure of the electrical device or power line element is made by the insulator body, the part of the circle or solid angle (sphere) is preferably more than 180 ° and 210 °, 240 °, 270 °, 300 °, The angle includes 330 ° or 360 °, or is within the range of the above value (for example, 180 ° to 360 ° or another angle). This angle is mainly determined by the mounting position of the corona ring or the position of the electric device or the element of the transmission line whose surrounding electric field distribution is to be corrected by corona ring. If the corona ring forms a plane, the starting point of the angle measurement is the intersection of the plane with the protected electrical device or power line element (its center point or axis), or the plane farthest from any part of the corona ring (If the corona ring is in the shape of a disc or circle, it will be the center point of the disc or circle). The electrodes on the corona ring will be at a smaller angle than the insulator body. In some embodiments, the portion of the circle or solid angle where the insulator body surrounds the electrical device or power line element is less than 180 °, depending on the electric field (eg, intensity value) to be changed, and It can be a value including 30 °, 60 °, 90 °, 120 °, 150 ° or 180 °, or a value within the range consisting of the above values (for example, 30 ° to 180 ° or other ranges).

  The encircling is considered assured when an air gap is provided between the insulator body and the electrical device or power line element. That is, when mounting the arrester on an electrical device or power line element, the surrounding portion of the insulator body remains at a distance from the element and does not contact the element (as a matter of course, The part of the insulator body used for mounting is adjacent to the element to which it is fixed). The corona ring is advantageously circular, but other corona ring shapes such as a sector or an ellipse can also be used.

  According to the invention, it has two main electrodes 4, 9 arranged on the insulator body 2 (ie mechanically coupled to the insulator body). Furthermore, the arrester has two or more intermediate electrodes 5 arranged between the main electrodes 4 and 9 on the insulator body. The condition is that electrical discharge between the main electrode and the adjacent intermediate electrode is promoted. The possibility of promoting electrical discharge is also ensured between adjacent intermediate electrodes. The possibility of electrical discharge is ensured primarily by placing the electrodes at a distance sufficient to cause electrical breakdown of the discharge gap. As shown in FIGS. 1 and 2, in order to place the intermediate electrode between the main electrodes along a curved or bent insulator body, the intermediate electrodes are shifted from each other at least in the direction of the longitudinal axis of the insulator body. Be placed.

  The main electrode can be flat or have another shape (in some cases, it can be the same shape as the intermediate electrode), but one or more main electrodes are taps (projections) that protrude from the surface of the insulator body. (I.e. away from the insulator body in a direction, usually in a direction transverse or parallel to the electrical device or power line element to which the arrester is attached). Such taps are formed between the electrodes and / or in order to create a sufficient discharge gap to break down, i.e., lower the discharge voltage and increase the chance of a discharge growing through the discharge gap where the protection is formed. Alternatively, by reducing the distance to the object on which the spark discharge is performed, an overvoltage is input to the arrester or an output from the arrester is facilitated. Further, the tap can be used to provide a connection with an element that is protected or grounded, eg, by a wire, cable, or the like.

  Due to the fact that the arrester has an electrode formed of a conductor disposed thereon, the arrester provides a corona ring that provides an improvement in the electric field structure around the electrical device or transmission line element on which the arrester is mounted. Start function as. Despite the fact that the electrodes arranged on the insulator body are not electrically connected, their potential varies with the commercial frequency of the electrical device or the element of the transmission line, this element and the arrester electrode. Due to the relatively high capacitance coupling between the two, there is a tendency to reach the potential level of the electrical device or transmission line element in which the arrester is mounted.

  The arrester according to the invention also functions as a corona ring and is therefore referred to as a corona ring-alester or simply as a corona ring. This corona ring-alrester is adapted by this function when the electrodes are elongate, for example, along the insulator body. Furthermore, if the insulator body has a metal rod inside, the electric field distribution is also affected by the capacitance coupled with the electrical device or power transmission line, and the arrester will act as a corona ring.

  Since the electrodes on the insulator body can be arranged arbitrarily (when electrical discharge is permitted between the electrodes in an overvoltage condition), this is an element of the electrical device or transmission line in which the arrester according to the invention is mounted In the case of improving the electric field structure, an additional degree of freedom is provided, and therefore, the electric field structure can be changed in various forms, directions, or portions more accurately in a wide range.

  FIG. 1 also shows the operating principle of a corona ring arrester according to the invention. When an overvoltage is input to the left main electrode 4 by spark discharge, an overvoltage is generated between the main electrode and the adjacent intermediate electrode 5, which breaks an air gap between these electrodes. Next, the destruction of the air gap that exists between adjacent intermediate electrodes 5 occurs until the overvoltage reaches the main electrode 9 on the right side of FIG. 1, and the electrode 9 has ground, grounded elements, or other different potentials. It is discharged to an element or another arrester. Furthermore, between the main electrode and other elements of the electric device or the transmission line, the other arresters can be similarly connected by electric wires.

  The length of the discharge gap between the main electrode along the surface of the insulator layer and the intermediate electrode closest to the main electrode is smaller than the length between the main electrode along the surface of the insulator layer and the element of the electric device or power transmission line . The discharge voltage between the main electrode and the intermediate electrode is such that the discharge of the overvoltage due to the flash passes along the intermediate electrode directly through the air gap and not through the elements of the electrical device or transmission line. Less than the discharge voltage of the air discharge between the elements of the electrical device or transmission line.

  In the illustrated corona ring arrester, the enclosure of the insulator body covers an angle of about 330 °. However, since the portions of the insulator body that extend toward the center of the circle for attachment approach the circle (connect to each other), the enclosure in this case covers 360 °.

Referring to FIG. 2, the intermediate electrode is disposed on the top of the insulator body slightly away from the insulator body. The discharge chamber is arranged between the electrodes 12, for example by introducing the end of the electrode 12 into a cup 14 made of a dielectric, said cup having a bottom and side walls forming a discharge chamber, The exit of
Preferably, it is provided on the side opposite to the bottom. Since the insulator body 2 is attached to the bottom portion of the dielectric cup 14, the mechanical coupling between the intermediate electrode 12 and the insulator body 2 is ensured. The discharge 13 occurring in the discharge chamber inside the dielectric cup 14 between the ends of the intermediate electrode protruding into the discharge chamber is an element connected in a direction away from the insulator body 2, preferably a corona ring arrester Exit the discharge chamber away from the. However, the outlet of one or more discharge chambers may be directed to the insulator body or the element connected to the insulator body or connected to the insulator body located nearby.

  The discharge chamber may also be provided in the intermediate electrode 12, the first main electrode 4 (shown on the left side of FIG. 2), and the second main electrode 9 (right side of FIG. 2). Can be provided between the intermediate electrodes themselves. The main electrode may protrude itself into the discharge chamber of the dielectric cup, or they are intended to form a discharge gap in the discharge chamber that is placed at a certain distance from the main electrode ( You may make it have a tap (as one electrode). In certain embodiments, the discharge from the main electrode is disposed on an electrical device or transmission line element to which the corona ring arrester is mounted, or at one or two ends of the insulator body, preferably the electrical device. Alternatively, the electric arc can be blown to the gold mounting means 7 electrically connected to the elements of the power transmission line.

  In other embodiments, the at least one intermediate electrode and / or the main electrode may be disposed within the dielectric layer, or may be at least partially covered by an insulator layer. In these cases, a discharge chamber appearing on the surface of the insulator layer or insulator is provided between the electrodes. In such a case, the discharge chamber is formed in the insulator layer or in the insulator itself, while the electrodes protrude into the discharge chamber forming a discharge gap between each other. The outlet of such a discharge chamber is usually a hole that connects the discharge chamber and the surface of the insulator layer or insulator body.

  FIG. 3 shows a pole 18 with an insulator 15, at least one hot wire 19 connected to the insulator 15 by a fixture, and one element of a transmission line (even for use in other electrical devices) A transmission line including two corona ring arresters 20 for dispersing the electric field strength in the vicinity of the insulator 15 is shown. The corona ring arrester 20 may be according to any of the above-described embodiments, thereby improving the protection against overvoltage caused by lightning discharge of the transmission line and the nearby electric field structure. In certain embodiments, a corona ring arrester or a plurality of corona ring arresters may be provided for one insulator or other transmission line element.

  When a lightning discharge occurs on the line 19, an overvoltage is transmitted to the lower tip 17 of the insulator 15 through the fixture. The corona ring arrester 20 is mounted by using the mounting device 7, and the corona ring arrester has an insulator body, and the first main electrode 4 and a number of intermediate electrodes are arranged on the top thereof. A tap projecting toward the second corona ring arrester is provided. An electrical discharge occurs between the intermediate electrode and the mounting device 7, and then an electrical discharge 6 occurs between the intermediate electrodes of the insulator body (under an overvoltage condition) and is transmitted to the main electrode 4. By this discharge, the potential of the main electrode 4 of the lower corona ring arrester approaches the potential of the tip 17, and therefore approaches the potential of the wire 19.

  Then, since the potential difference between the main electrodes 4 of the upper and lower corona rings 20 mounted on the respective tips 16 and 17 of the insulator 15 approaches the breakdown overvoltage, the electric air discharge 8 is generated between the electrodes 4. Get up in. In some embodiments, the electrodes 4 can be connected to each other by lines or additional electrodes.

  Furthermore, since the potential difference between the first main electrode 4 and the intermediate electrode of the upper corona ring is approaching an overvoltage, a discharge occurs between these electrodes and also between the intermediate electrodes, thereby overvoltage is applied to the mounting device. 7 and the upper tip 16 of the insulator 15 connected to the ground pole 16 of the transmission line.

  Since the growth of the discharge and the transmission of the flash discharge overvoltage occur quickly enough, all these discharges are simultaneously present, whereby the charge received by the lightning flows to ground. When the power frequency voltage passes through zero, the arc is extinguished and the transmission line restores its operating capability, while the corona ring discharge remains ready to flow the next flash discharge overvoltage to ground.

  The corona ring arrester is provided on the insulator by attachment means that can be part of the corona ring or can be an element provided on the tip. In order to ensure the maintenance of such a device, the discharge voltage of the discharge between the main electrode and the mounting means or the electrical device or the elements of the transmission line is discharged through the air gap between the main electrode and the adjacent intermediate electrode. It is desirable to form a state in which the discharge voltage is larger than the above discharge voltage.

  One of the properties that makes it possible to define the required mechanical properties of corona rings (especially in insulators) is the bending strength. For example, it can be determined by the method shown in FIGS. According to this method, the corona ring is not bent, the member for manufacturing the corona ring is straightened, or the corona ring is not bent or the corona ring member is bent. If not possible, if it is possible to provide an experimental prototype that differs only in the same material and linearity as the corona ring arrester insulation body, then an unbent linear corona Some of the rings 20 (eg, with or without a rod inside depending on the type of insulator body) are at a distance L from each other, eg, the thickness of a corona ring (eg, the thickness of a conductor with an insulator) ) Is placed on two supports 21 separated by 10-20 times d, ie the preferred variables shown in FIGS. 4 and 5, eg L = 20d (corona ring is often a circle The thickness d corresponds to the diameter of the corona ring measured along the surface of the insulator body because it has a cross section of shape.

  Further, a ram that deforms in the middle (exactly in the middle) of the two supports 21 in a plane located at a substantially central portion where the corona ring 20 is placed is applied to the corona ring 20 from above, and its force F is The force transmitted to the corona ring causes the corona ring 20 to deflect downward h (in this case the direction is determined by the measuring configuration of FIGS. 4 and 5 rather than the actuated configuration). In the measurement result of the force F and the deflection (bending) h, the bending strength coefficient k = F / h (F is the force applied to the dielectric element, and h is the displacement amount of the dielectric element).

  In the preferred embodiment, the dielectric deflection h is measured at a point 24 below the point where the force F of the corona ring 20 is applied. The reason is that in the upper part of the corona ring 20 where the force F is directly applied by the deformation imparting ram 25, if the corona ring is made of a material that is easily deformed (for example, a flexible or soft material), the displacement is Although there is a possibility that the corona ring 20 is irrelevantly deformed, the displacement of the surface of the coronal ring point 24 below the point where the force F acts is caused only by the displacement of the corona ring 20.

  From the perspective of the possibility of deflection of the corona ring 20 unrelated to deformation, when the corona ring is made using a material that is easy to deform (eg, flexible or soft), only by the deformation imparting ram 25. In order to prevent deformation of the lower surface of the corona ring due to the support 21 resulting in the deformation of the support 21 and the deviation of the deflection amount h, a rigid spacer 22 may be placed between the corona ring 20 and the support 21. Good. The spacer 22 can be flat or like a channel. The spacer 22 allows the deformation force from the support 21 to be distributed over a longer range of the corona ring 20, thereby reducing the deviation of the measured deflection of the corona ring. The spacer 22 preferably allows the angular position relative to the support 21 to be freely changed. In some cases, the spacer 22 and the support 21 can be connected by a hinged connection. It is conceivable that the spacer 22 is made of a material that is not easily deformed (for example, with respect to the dielectric element) like the support 21.

  If a force is applied to the corona ring and an unrecoverable deformation occurs (for example, if the corona ring is cracked or cracked), the corona ring is brittle, inflexible and / or has a bending strength factor that does not break. It is considered higher and corona ring is not considered to change its shape freely (without failure).

  In a preferred embodiment, to prevent corona ring deformation, its minimum bending strength (bending strength factor) is 1 N / m (depending on the material used to make the corona ring, the shape and size of the corona ring). , 10N / m, 25N / m, 50N / m, 75N / m, 100N / m, 200N / m, 300N / m, 400N.m, 500N / m or more than 1000N / m.

  In the description of the present specification, the terms “having”, “having”, and “including” indicate the fact that a specific feature, element, component, action, value, and the like are present, and these include other features and elements. It does not preclude the possibility of existence of components, actions, values, etc.

  The embodiments and variations of the arresters according to the invention described herein are intended to clearly illustrate their design and operation, as well as the corona ring arresters using this arrester. It will be apparent to those skilled in the art that the above embodiments can be modified within the scope of the claims.

Claims (12)

Arrester for protecting electrical devices or power line elements from lightning,
An insulator body configured to mechanically attach to an electrical device or power line element, and to ensure that the electrical device or power line element or adjacent element is partially enclosed;
Two main electrodes mechanically coupled to the insulator body;
An intermediate electrode mechanically coupled to the insulator body and disposed between the main electrodes along the insulator body, between the main electrode and the intermediate electrode and between adjacent intermediate electrodes Two or more intermediate electrodes configured to form a discharge;
Arrester with.   Circles or spheres where the elements of the electrical device or transmission line are secured by the insulator body are 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 The arrester of claim 1 comprising a range of °, 300 °, or 360 °.   The arrester according to claim 1, wherein at least one main electrode has a tap protruding from a surface of the insulator body.   The arrester according to claim 1, wherein the intermediate electrodes are arranged to be shifted from each other along the insulator body.   The arrester according to claim 1, wherein the arrester has a discharge chamber between the intermediate electrode and the main electrode.   The arrester according to claim 1, wherein the arrester has a discharge chamber between the intermediate electrodes.   The arrester according to claim 1, wherein the intermediate electrode is covered with an insulating layer, and a discharge chamber appearing on a surface of the insulating layer is disposed between the adjacent intermediate electrodes.   The arrester according to claim 7, wherein the main electrode is at least partially covered with an insulating layer, and a discharge chamber appearing on a surface of the insulating layer is disposed between the intermediate electrode and the main electrode.   The arrester according to claim 1, wherein the arrester has fixing means for attaching to the element of an electrical device or transmission line.   The bending rigidity coefficient of the insulator body is 1 N / m, 10 N / m, 25 N / m, 50 N / m, 75 N / m, 100 N / m, 200 N / m, 300 N / m, 400 N.m, 500 N / m or The arrester according to claim 1, wherein the arrester is greater than 1000 N / m. A pole with an insulator;
At least one hot wire coupled to the insulator by a fixture;
An arrester for protecting the electrical device or the elements of the transmission line from lightning,
The arrester is made as an arrester according to any one of claims 1 to 10,
power line.   The arrester is provided on an insulator by attachment means, and a discharge voltage between the main electrode and the intermediate electrode is smaller than a discharge voltage between the main electrode and the electric device or the element of the power transmission line, The power transmission line according to claim 11.

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