JP6382371B2 - Surge arrester device - Google Patents

Description

  The present invention relates to a surge arrester device having a voltage-dependent impedance device, the voltage-dependent impedance device being at least partially surrounded by a housing and penetrating through the housing (kinematische Kette). ) Can be opened and closed by a disconnector operable via

This type of surge arrester device is known, for example, from US Pat. The surge arrester device described therein has an impedance device (hereinafter referred to as a voltage-dependent impedance device) that depends on a voltage disposed inside the housing. This voltage-dependent impedance device can be opened and closed by a disconnector, and an interlocking mechanism penetrating the housing is used to operate the disconnector. In this known surge arrester device, the interlocking mechanism is implemented in the form of a movable center rod. This ensures a simple and reliable operation of the disconnector of the surge arrester device.
However, mechanical defects in the center rod can result in an overall outage of the surge arrester device. In particular, repair or replacement of the center rod requires extensive assembly work, both in the housing and in the disconnector.

German Patent Application Publication No. 102012217310A1

  It is therefore an object of the present invention to create a surge arrester device of the type mentioned at the beginning which can be maintained in a simplified form.

  The problem with the surge arrester device of the type mentioned at the outset is solved according to the invention by the fact that the above-mentioned interlocking mechanism has a coupling device.

  The surge arrester device is a device that can be installed in a power transmission system. Transmission systems are used to transmit electrical energy between energy sources and energy consuming areas. In this case, the power transmission system is designed in consideration of various rated values. The electrical insulation is designed in consideration of the rated voltage, for example. Electrical overload results in irreparable damage. For protection, the transmission system can be equipped with a so-called surge arrester device, which helps to reduce or limit the so-called surge voltage in the event of a failure, ie when the rated voltage is exceeded. For this reason, the surge arrester device can flow a surge current through the surge current path when necessary. This surge current path can be opened and closed with respect to the ground potential, for example. For example, the surge current path extends from the phase conductor to the ground potential. In this case, the surge current path may have a voltage dependent impedance device. The impedance value of the voltage dependent impedance device changes according to the applied voltage. The voltage dependent impedance device at least partially constitutes a surge current path. This voltage-dependent impedance device can be implemented, for example, as a varistor, or can have a varistor. The varistor has a rated voltage, has a low impedance characteristic above the rated voltage, and has a high impedance characteristic below the rated voltage. The change in the impedance characteristic occurs according to the voltage applied to the voltage-dependent impedance device or varistor. The voltage-dependent impedance device may have, for example, a regulated discharge gap in the simplest case. Preferably, a metal oxide having a voltage-dependent impedance characteristic is used as the voltage-dependent impedance device. For example, a zinc oxide component is suitable, which creates a steady electrical connection between the potential to be monitored in the transmission system (eg, the high voltage potential of the phase conductor) and the ground potential. Thus, this configuration can cause leakage current.

  The voltage dependent impedance device is further connected to a disconnector, and the disconnector can be used to put the voltage dependent impedance device into an operating state or to put it into a resting state. The disconnector can be part of the surge current path. Preferably, the voltage dependent impedance device and the disconnector are electrically connected in series. The disconnector can be placed in the surge current path, for example, at the ground potential side end of the voltage dependent impedance device. However, the disconnector can also be arranged at the high-voltage potential end of the surge current path. The drive can be placed at the same potential as the disconnector or at a different potential depending on where it is installed. If necessary, the interlocking mechanism inserted to transmit the motion may have an electrical insulating part to bridge the potential difference. Preferably, the disconnector can be a conventional breaker. Conventional circuit breakers have a plurality of relatively moveable contacts that can be in electrical contact with or separated from each other. The disconnector can be installed in a surge arrester device for safety purposes, for example. However, the disconnector can be provided to disconnect the voltage-dependent impedance device from the ground potential, for example for inspection purposes, or to interrupt the surge current path, so that, for example, when a test surge voltage is applied It is possible to prevent the voltage-dependent impedance device from responding to the above.

  The disconnector can be operated via the interlocking mechanism. The operation of the disconnector is performed, for example, by connecting a plurality of openable / closable contactors of the disconnector that are relatively movable. In this case, at least one of both open / close contacts can be moved for the operation of the open / close gap of the disconnector. Alternatively, both opening and closing contacts can be moved to cause the relative movement. In this case, the disconnector should be designed to allow operation only in a substantially no-current state, that is, only when the voltage dependent impedance device is in a high impedance state. By doing so, an inexpensive disconnector can be used, and the disconnector does not need to be provided with an additional device for extinguishing the switching arc and the like, and simplification. It is possible to use the opened and closed contact.

  In this interlocking mechanism, one of a plurality of open / close contacts that can move relatively or a plurality of open / close contacts that can move relatively is connected to a drive device. In this case, necessary energy conversion can be performed in order to cause relative movement between the open / close contacts in the drive device. For example, the drive can convert electrical energy into mechanical energy, which can cause relative movement between the switch contacts of the disconnector. However, any conversion / conversion of the energy form is possible.

  The coupling device can function as a part of the interlocking mechanism. To that end, the coupling device can have, for example, a mechanical element (for example a shaft) for transmitting motion. Using this connecting device, the interlocking mechanism can be released. This coupling device forms an interface in the interlocking mechanism.

  The voltage dependent impedance device can have, for example, one varistor or multiple varistors connected in parallel. In this way, the surge current can be shared among a number of varistors according to the expected load bearing capacity. Furthermore, each varistor can be assembled with a plurality of partial components. For example, a plurality of blocks (for example, a plurality of metal oxide blocks) can be clamped to form one varistor, and the plurality of clamped varistors can be electrically connected in parallel. Regardless of the number of multiple varistors electrically connected in parallel, the interlocking mechanism can be used to open and close one or more varistors. Preferably, by this interlocking mechanism, a large number of open / close gaps of one disconnector can be operated as necessary, and therefore a large number of open / close gaps can be operated in synchronization.

  This interlocking mechanism can have various mechanical elements. This interlocking mechanism has a function of transmitting kinetic energy from, for example, a drive device to a relatively movable contact of the disconnector. In this case, the interlocking mechanism passes through the housing, ie one wall of the housing, so that the housing can be a mechanical protection barrier between the drive and the disconnector. It is possible to open, shut off, or change the interlocking mechanism as required by the connecting device in the interlocking mechanism. Thus, for example, the drive can be replaced without affecting the structure of the disconnector itself or without having to access the interior of the housing. This coupling device is preferably accessible both outside the housing, ie outside the housing part containing the voltage-dependent impedance device. For example, when a drive device fails, the components of this drive device can be replaced. In that case, the protection function of the surge current path or of the voltage dependent impedance device is retained. That is, the contact of the voltage-dependent impedance device with the ground potential, particularly via the disconnector, can be maintained during replacement or repair in the interlocking mechanism.

  In another advantageous form, the connecting device has a shaft.

  The shaft is a mechanical part that can transmit a large force and has a large strength at that time. Furthermore, the shaft can be advantageously supported on a bearing. The shaft can be well sealed even during rotational movement. In that regard, the shaft can be used to traverse the walls of the housing, sealing if necessary. In this case, the shaft may have a plurality of different portions in the axial direction. For example, the shaft may have a plurality of portions having different cross sections, and in this case, a single stepped shaft is obtained. Furthermore, at least one ball bearing, in particular a number of ball bearings, can be arranged on the shaft axially separated from each other, in particular the rotation of the shaft between two ball bearings that are axially separated from each other. A seal for the radial seal of movement can be arranged. In this case, preferably, the diameter of the shaft of the bearing portion can be made smaller than that of the radial seal portion. In this case, the shaft projects only slightly from the wall in the cross-sectional direction of the wall. It can be provided such that the majority of the axial length of the shaft is located inside the wall. This enables stable bearing support of the shaft on the wall of the housing. Other movements and forces can be transmitted on the end side of the shaft.

  Furthermore, it is preferable that the connecting device is provided so as to penetrate the wall of the housing in a fluid-tight manner.

  By penetrating the housing in a fluid tight manner, the housing itself can be filled with an electrically insulating fluid, in particular a gas, and its dissipation can be prevented by a seal of the coupling device. In this case, the shaft of the coupling device can be sealed using, for example, a radial seal, which allows the shaft to be rotationally moved while being fluid-sealed.

  In another advantageous form, the coupling device is coupled with a gear.

  The force transmitted through the coupling device of the interlocking mechanism can be geared up and / or geared down using a gear. In this case, the gear can be part of the interlocking mechanism. This makes it possible to increase or decrease the movement in order to transmit the driving movement in a simple manner to the relatively movable contacts of the disconnector. In this case, it is preferable to use a self-locking gear, whereby, for example, the movement generated from the open / close contact is blocked by the self-locking gear and fed back to the interlocking mechanism. Disappears. As the self-locking gear, for example, a worm gear or a spindle gear can be used.

  In another advantageous form, the coupling device is coupled to a coupling, in particular a mating coupling.

  Coupling can be used to release or connect the interlocking mechanism. In this case, the coupling can be formed in a very special form. For example, by this coupling, transmission of force through the interlocking mechanism can be accurately disconnected, that is, disconnected, so that, for example, the disconnector cannot be operated. Furthermore, the coupling mechanism can be separated by this coupling, and as a result, it is possible to easily perform, for example, replacement of individual parts of the coupling mechanism, replacement of the driving mechanism of the coupling mechanism, and repair. Become. By using the fitting type coupling, the force can be transmitted through the interlocking mechanism based on the shape of the other side of the coupling. In this case, it is preferable that the counterparts of the coupling face each other with the same shape, and thereby, it is possible to transmit the driving motion with the least possible slip through the coupling device.

  In another advantageous form, the drive connected to this interlocking mechanism is flanged to the housing.

  The purpose of the drive is to direct some movement to the interlocking mechanism. This drive can convert one energy form to another energy form in order to cause relative movement of a plurality of switching contacts of the disconnector. For example, the drive device can have a crank gear, to which a rotational movement is transmitted, which is then transmitted via a coupling to the coupling device, in particular to the shaft of the coupling device. The coupling is securely held by mounting the flange of the driving device, and thus it is possible to prevent inadequate loosening of the coupling. This coupling can be configured as follows, for example, as a fitting-type coupling at the time of mounting. That is, the coupling is inserted into the housing in the direction of attachment to the flange of the driving device, and the coupling is securely held / pressed by being fixed to the housing of the driving device. it can. In this way, the coupling can be securely held by being coupled to the drive device by means of a flange on the housing.

  In another advantageous form, the housing is filled with an electrically insulating fluid.

  Filling the housing with an electrically insulating fluid means that it is possible to select an electrically insulating fluid having good electrical insulation performance and fill it into the housing. For this purpose, the housing is configured as a capsule housing in order to prevent undesired dissipation of the electrically insulating fluid enclosed inside the housing. Since the housing can be preferably configured as a pressure vessel, it is possible to create a pressure difference between the inside and the outside of the housing. As a result, an overpressure is generated inside the housing, so that the electrically insulating fluid is placed under an overpressure, and as a result, the electrical insulation performance can be further enhanced. The housing can be formed, for example, at least in part from a conductive material, thereby preferably leading to a ground potential. As a result, the conductive portion of the housing can be used as a contact point for forming a ground point for surge current. This allows the housing to be designed to withstand the surge current expected. However, the housing may be configured to be electrically insulating at least partially or completely. In particular, the electrically insulating part of the housing can be provided with an electrically insulating embedded part of the connecting conductor for the voltage-dependent impedance device, so that it is electrically insulated through the wall of this housing, for example at the high voltage connection. Can be penetrated. This connecting conductor is part of the surge current path. All crossings of the housing, whether at the high voltage side end of the surge current path, at the ground side end, or at the interlocking mechanism crossing, have a fluid sealing function and in particular It must be configured to have pressure resistance. For example, in order to construct the penetrating portion of the interlocking mechanism in a pressure-resistant manner, it is a preferable form to provide a seal in the radial direction particularly on the shaft of the coupling device.

  As the electrically insulating fluid, for example, a fluorine-containing medium such as sulfur hexafluoride, fluoroketone, or fluoronitrile is suitable. However, we have recognized that nitrogen, especially purified air and carbon dioxide, is also suitable. In this case, it is preferable that the above-mentioned fluid exists in a gaseous state, whereby the inside of the housing is filled with the above-described fluid. However, it is also possible for this fluid to be present at least partially in liquid form inside the housing.

  According to another advantageous embodiment, the coupling may be pressed by the flange mounting portion of the drive device.

  By attaching the flange of the drive device to the housing, the housing and the drive device can be fixed relative to each other. In this way, it is possible to couple the drive device and the housing at a fixed angle. The coupling with this fixed angle allows the coupling to be pressed into the interlocking mechanism, so that motion can be transmitted through the coupling or coupling device of the interlocking mechanism. In this way, by attaching the flange of the driving device, it is possible to press the coupling in one part, for example, the coupling pawl of the coupling partner is engaged, and the rotation can be transmitted through the coupling. it can. Furthermore, this coupling can be reliably held by the flange mounting portion in the coupled state.

  According to another advantageous embodiment, the shaft can be configured such that a screw shaft is connected on at least one side of the coupling device, in particular on both sides.

  With the rotating screw shaft, it is possible to displace the “Nuss” over the screw shaft in the axial direction. As a result, the rotational motion of the screw shaft can be converted into a linear motion with a simple shape. In this way, for example, rotational motion can be transmitted through a shaft that penetrates the housing and converted into linear motion through a screw shaft connected to the shaft. Thus, for example, linear relative movement between a plurality of switching contacts of the disconnector can be generated. At the same time, this screw shaft can prevent the reverse action to the interlocking mechanism or the introduction of impact due to, for example, the open / close contact of the disconnector. This self-locking action of the screw shaft is particularly advantageous here. The shaft can be extended as a screw shaft on at least one side of the coupling device, in particular on both sides. In particular, since at least one screw shaft can be concentrically extended with respect to the shaft, it is possible to perform coupling with the shaft at one end surface of the screw shaft. In particular, a plurality of couplings can be provided on both sides of the housing wall, whereby each screw shaft can be coupled with a shaft. In this case, the couplings can have different structures. For example, the screw shaft can be pinned to the shaft or can be spring coupled. Furthermore, the screw shaft and the shaft may be configured to be engaged and connected to each other by claws, or may be configured to be connected to each other by an adapter or a bush having an appropriate clearance, for example.

  Hereinafter, embodiments of the present invention will be schematically illustrated and described in detail.

It is typical sectional drawing of the surge arrester apparatus provided with the interlocking mechanism. It is a figure which shows the connection apparatus of an interlocking mechanism in detail.

  FIG. 1 shows a cross section of a surge arrester device. This surge arrester device has a housing 1. The housing 1 is made in the form of a hollow body, one part having a conductive wall and the other part having an electrically insulating wall. A ground potential is applied to the wall formed of the conductive material. Here, the housing 1 has a substantially hollow cylindrical structure aligned concentrically with the main shaft 2. One end surface of the housing 1 is formed of a disk-shaped electrical insulator 3 to form an electrical insulating wall. This gives the possibility of inserting a single phase conductor into the capsule housing and avoids shorting or direct contact of the conductive wall with the earth potential due to the electrical insulation effect of the electrical insulator 3. ing. The surge current path extends from the high voltage potential 4 to the ground potential 5. This surge current path has a varistor 6. The varistor 6 functions as a voltage dependent impedance device. The varistor 6 preferably has a number of metal oxide blocks stacked and held in the axial direction to obtain sufficient voltage strength. One of the varistors 6 is in contact with the high voltage potential 4 and the other is in contact with the ground potential 5. The varistor 6 is mechanically held in the housing 1 between a portion of the housing 1 that leads to the ground potential 5 and the electrical insulator 3.

  A disconnector 7 is arranged between the varistor 6 and the ground potential 5 on the ground potential side of the surge current path. As an alternative, this disconnector 7 can also be installed at the opposite end of the varistor 6. In that case, in order to prevent a short circuit of the varistor 6, a part of the interlocking mechanism for operating the disconnector 7 must be electrically insulated as necessary. This disconnector 7 makes it possible to separate the surge current path. For this purpose, the disconnect switch 7 has a movable contact 8. The movable contact 8 is in the form of a bolt here, and is arranged substantially concentrically with respect to the main shaft 2. Further, the movable contact 8 is supported so as to be displaceable in the axial direction with respect to the main shaft 2. For this purpose, a contact holder 9 is provided, which is conductively coupled to a part connected to the ground potential 5 of the housing 1, and in particular is supported at the corresponding part in the housing 1. The movable contact 8 is guided so as to be displaceable in the axial direction via a sliding bush of the contact holder 9, and always has a ground potential 5. The disconnector 7 further includes one place fixing contact 10. The place fixing contact 10 is formed in a bush shape here, and the opening of the bush is formed in a complementary shape to the movable contact 8. The place fixing contact 10 is connected to the ground potential side terminal of the varistor 6 and is electrically insulated from the portion leading to the ground potential of the housing 1. Only when the open / close gap of the disconnector 7 between the two contacts 8 and 10 is contacted or bridged is the ground potential applied to the place fixing contact 10. When the open / close gap between the contacts 8 and 10 is opened, the place fixing contact 10 is electrically insulated. In this state, the place fixing contact 10 has a so-called floating potential or indefinite potential.

  In order to cause the movable movement of the movable contact 8, a driving device 11 is provided. The drive device 11 is flanged to the housing 1. The drive device 11 is for connecting the motion to the interlocking mechanism, and the interlocking mechanism transmits the motion from the drive device 11 to the movable contact 8. For this purpose, the interlocking mechanism has a coupling device 12. The configuration of the connecting device 12 is shown in detail in FIG. The coupling device 12 has a rotatable shaft 13 that passes through one wall of the housing 1. Couplings 14a and 14b are respectively provided on both sides of the wall through which the housing 1 passes, whereby the connecting device 12 can be connected to the interlocking mechanism. Here, the interlocking mechanism has a first screw shaft 15 connected to a rotatable shaft 13 via a coupling 14b inside the housing 1. Outside the housing 1, a second screw shaft 16 is connected to a rotatable shaft 13 via a coupling 14a. Both screw shafts 15 and 16 are arranged in a straight line. Both screw shafts 15, 16 are also positioned in a straight line with respect to the rotatable shaft 13 as well. The connection of the screw shaft 15 inside the housing 1 and the screw shaft 16 outside the housing 1 to the rotatable shaft 13 is the opposite ends of the shaft 13 and the screw shafts 15, 16 respectively. This is done.

  The first screw shaft 15 protrudes into and engages with the female screw of the movable contact 8, and the female screw is prevented from rotating. As a result, when the first screw shaft rotates, the rotational motion of the first screw shaft is converted into the linear motion of the movable contact 8. The interlock mechanism can be operated by the hand crank 17 via the second screw shaft 16. For this purpose, the second screw shaft 16 is rotated by the hand crank 17, the rotational movement is transmitted to the rotatable shaft 13 via the coupling 14a, and further the rotational movement is transmitted via the coupling 14b. It is provided so that it can be transmitted to the first screw shaft.

  The opening / closing link 18 is guided so as to be axially displaceable on the second screw shaft 16, and is thereby moved in synchronization with the movement of the movable contact 8. In this way, the state or relative position of the movable contact 8 can be displayed on the driving device 11.

  Hereinafter, the configuration of the coupling device 12 will be described in principle with reference to FIG. For this purpose, FIG. 2 shows the drive device 11 introduced in FIG. 1 in a sectional view. Similarly, the rotatable shaft 13 of the coupling device 12 is also shown in cross section. The length of the rotatable shaft 13 is substantially the same as the thickness of the wall of the housing 1 through which the rotatable shaft 13 passes. That is, the rotatable shaft 13 protrudes only slightly from the opening of the wall hole of the housing 1 that is penetrated by the rotatable shaft 13. The rotatable shaft 13 has a large number of cross sections here, and a central portion 19 having a large diameter is sandwiched between two portions having a small diameter. The central portion 19 is surrounded in the radial direction by two seals 20 separated in the axial direction. Both seals 20 provide a radial seal of the central part 19 against the inner surface of the housing 1, preferably a cylindrically shaped complementary wall hole. In this way, a radial seal of the shaft 13 with respect to the housing 1 is ensured. The radial seal is preferably pressure resistant. Ball bearings 21 are respectively provided on the portions of the shaft 13 having a small diameter on both sides of the central portion 19. The ball bearing 21 enables the shaft 13 to be guided and supported by the housing 1 regardless of other components of the interlocking mechanism.

  A first screw shaft and a second screw shaft are connected to each end of the rotatable shaft 13. Both screw shafts 15 and 16 are connected to a rotatable shaft 13 via couplings 14a and 14b, respectively. Here, both couplings 14a and 14b are formed by different methods. The coupling 14a for coupling the rotatable shaft 13 and the second screw shaft 16 has a sleeve-like coupling component, which is fitted in the second screw shaft and the rotatable shaft 13 in a complementary shape. This forms a mating connection between the second screw shaft and the rotatable shaft 13 via a sleeve-like coupling component. As an alternative, the coupling 14a may be, for example, a spring coupling, press-fitting, or an equivalent system.

  The coupling between the first screw shaft and the rotatable shaft 13 is such that the lateral bolt passes through the portion of the first screw shaft protruding in a complementary shape to the hole on the end face side of the rotatable shaft 13. This is done by pinning. In this case, the position of this pin is selected as follows. That is, this pin is selected so that it exists in the 1st area | region which has pinched | interposed the center part 19 of the shaft 13, In this case, the protrusion of the pin in the radial direction is prevented by covering the ball bearing 21.

  The wall hole of the housing 1 that houses the rotatable shaft 13 of the coupling device 12 is formed as follows. That is, a shoulder protruding in the direction of the flange mounting portion of the driving device 11 is disposed on the inner side, and a ball bearing 21 that ensures pinning of the coupling 14b is in contact with the shoulder in the axial direction. . As a result, the seal 20 and the other ball bearing 21 are also indirectly pressed against the protruding shoulder. For this purpose, the drive device 11 has a flange mounting plate 22. The flange mounting plate 22 has a central hole with a shoulder 23 for pressing and holding. The pressing holding shoulder portion 23 is formed so as to circulate in the radial direction and acts on one ball bearing 21. Next, the ball bearing moves the other ball bearing 21 through the central portion 19. , Against the protruding shoulder inside the wall of the housing 1. The flange mounting plate 22 is pressed against the housing 1 by a bolt 24 corresponding to this. Thus, the connecting device 12 is securely held in the wall of the housing 1 that is penetrated by the interlocking mechanism. The couplings 14a and 14b are securely held by the flange mounting portion.

  Thereby, the coupling device 12 in which the couplings 14a and 14b are securely held by the flange mounting portion of the drive device 11 is obtained.

  The second screw shaft 16 is coupled to the rotatable shaft 13 via a coupling 14a. In order to improve the support of the second screw shaft 16, a guide component 25 is added to the flange mounting plate 22, and the guide component 25 is concentrically aligned with the main shaft 2. The guide component 25 is formed, for example, as a hollow cylinder. However, for example, a large number of stud bolts can be distributed around the main shaft 2 to have the same function. The guide component 25 serves to form a coupling point 26 for securing the cover 27. The cover 27 surrounds the guide component 25, and consequently the second screw shaft 16, on the outer surface side and forms a bearing bush 28 for the second screw shaft 16. Two ball bearings are arranged in the bearing bush 28 of the cover 27.

  An open / close link 30 (18 in FIG. 1) is disposed on the second screw shaft 16 so as to be displaceable. Since the opening / closing link 30 is supported by the guide component 25 so as to be prevented from rotating and displaceable in the vertical direction, when the second screw shaft 16 rotates, the opening / closing link 30 is displaced in the axial direction. At this time, the position of the opening / closing link 30 on the second screw shaft 16 is synchronized with the relative position of the movable contact 8 inside the housing 1. In response to this, a plurality of signal contacts 31, 32 are arranged on the guide component 25, and these signal contacts indicate the position of the movable contact 8 and the resulting open / close state of the disconnect switch 7 as a result. To work for. Here, the signal contacts 31 and 32 are provided with corresponding contact points, and these contact points are electrically bridged when the switching link 30 passes. Thereby, the open / close state of the disconnector 7 in the control room can be displayed, for example.

  In addition to this, on-site display of the open / close state of the disconnect switch 7 can be performed in the drive device 11. For this purpose, for example, holes 33 and 34 can be provided in the guide component 25 or the cover 27 so that the position of the opening / closing link 30 can be seen through the holes. Alternatively, color marking may be attached to the open / close link 30 in order to enable on-site display rich in contrast of the open / close state of the disconnector 7 in the area of the holes 33 and 34.

DESCRIPTION OF SYMBOLS 1 Housing 2 Main axis | shaft 5 Ground potential 6 Impedance device 7 Disconnector 8 Movable contact 9 Contact holder 10 Contact 10 for fixing a place 11 Drive device 12 Coupling device 13 Rotary shaft 14a Coupling 14b Coupling 15 First coupling 15 Screw shaft 16 Second screw shaft 17 Crank handle 18 Opening / closing link 19 Center portion of rotatable shaft 20 Seal 21 Ball bearing 22 Flange mounting plate 23 Shoulder portion 24 Bolt 25 Guide component 26 Connection point 27 Cover 28 Bearing bush 30 Opening / closing link 31 signal contact 32 signal contact 33 hole 34 hole

Claims (6)

A surge arrester device comprising a voltage-dependent impedance device, wherein the voltage-dependent impedance device is at least partially surrounded by a housing (1) and via an interlocking mechanism passing through the housing (1) In a surge arrester device configured to be openable and closable by an operable disconnector (7),
The interlocking mechanism, have a coupling device (12),
The coupling device (12) is coupled to a coupling (14a, 14b);
A driving device (11) is coupled to the interlocking mechanism, and the driving device (11) is flanged to the housing (1);
The surge arrester device , wherein the coupling (14a, 14b) is pressed by a flange mounting portion of the drive device (11) . The surge arrester device according to claim 1,
The surge arrester device, wherein the coupling device (12) has a shaft (13). The surge arrester device according to claim 1 or 2,
The surge arrester device, wherein the connecting device (12) penetrates the wall of the housing (1) while fluid-sealing. In the surge arrester apparatus of any one of Claims 1-3,
Surge arrester device characterized in that the coupling device (12) is coupled to gears (15, 16). In the surge arrester device according to any one of claims 1 to 4 ,
Surge arrester device characterized in that the housing (1) is filled with an electrically insulating fluid. In the surge arrester device according to any one of claims 3 to 5 , which directly or indirectly cites claim 2 and claim 2 .
A surge arrester device, wherein a screw shaft (15, 16) is connected to the shaft (13) on at least one of the coupling devices (12).