Conductor arrangement
By introducing electrically insulating supports and switchable conductor connections into the conductor assembly, the problem of damage to overvoltage dischargers during transportation and testing is solved, achieving compatibility with long lifespan and high-voltage testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SIEMENS ENERGY GLOBAL GMBH & CO KG
- Filing Date
- 2021-09-13
- Publication Date
- 2026-06-12
AI Technical Summary
Overvoltage dischargers are easily damaged during transportation and testing, resulting in a shortened service life, and they cannot be tested under high voltage without support.
Design a conductor device in which an overvoltage discharger has a longitudinal operating state and a test state, and is arranged longitudinally between an electrical conductor and the overvoltage discharger by an electrically insulating support member. The support member is supported by the electrical conductor and indirectly supports the overvoltage discharger. The conductor connection can be switched between the two states, and a flexible ring and conductive components are provided to buffer thermal expansion and lateral forces.
It effectively avoids damage to conductor devices during transportation, extends the service life of overvoltage dischargers, and supports high-voltage testing.
Smart Images
Figure CN116325395B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a conductor device. Background Technology
[0002] Overvoltage dischargers are designed to limit electrical overvoltages that may occur, such as during a lightning strike. An overvoltage discharger may be a long and heavy, supported component. When using a fixed-mount conductor, the conductor can support the overvoltage discharger. If the overvoltage discharger is not supported, this may cause it to deform due to its own weight, potentially leading to damage during transport and a shortened lifespan. Switchable overvoltage dischargers exist, in which the electrical connection from the conductor to the discharger is separable. Separating the electrical connection from the conductor to the discharger may be important, for example, to perform high-voltage testing of the conductor. However, when the electrical connection from the conductor to the discharger is separated, the overvoltage discharger cannot be supported by the conductor. This may result in a shortened lifespan for the overvoltage discharger. Summary of the Invention
[0003] Therefore, the technical problem to be solved by the present invention is to realize a conductor device with an overvoltage discharger, wherein the overvoltage discharger has a long service life.
[0004] The conductor device according to the invention comprises: an electrical conductor; an overvoltage discharger having a longitudinal direction, an operating state, and a test state, wherein in the operating state the overvoltage discharger is designed to limit overvoltages occurring in the electrical conductor, and in the test state the overvoltage discharger is not designed to limit overvoltages; and an electrically insulating support member arranged longitudinally between the overvoltage discharger and the electrical conductor, wherein the support member is supported by the electrical conductor and the overvoltage discharger is supported by the support member. Due to the presence of the support member, the overvoltage discharger is grounded and supported by the electrical conductor in both the operating state and the test state. This avoids damage during the transport of the conductor device and results in a long service life for the overvoltage discharger.
[0005] The overvoltage discharger preferably has a conductor connection that is at least partially movably arranged relative to the remaining overvoltage discharger and is therefore designed to switch the overvoltage discharger between an operating state and a test state, wherein the conductor connection is farther from the remaining overvoltage discharger in the operating state than in the test state. Thus, the overvoltage discharger can enter the operating state by moving the conductor connection toward the electrical conductor and can enter the test state by moving the conductor connection away from the first conductor. In the operating state, there is a conductive connection from the electrical conductor to the overvoltage discharger; in the test state, this conductive connection is interrupted.
[0006] Preferably, the conductor assembly has a kinematic connection by which the overvoltage discharger and the support are coupled to each other, allowing the support to move relative to the overvoltage discharger in the longitudinal direction. Particularly preferred is a gap in the longitudinal direction between the overvoltage discharger and the support. This gap, narrowed in the longitudinal direction, compensates for thermal expansion of components such as the conductor, support, and / or overvoltage discharger. Mechanical stress in the conductor assembly during thermal expansion is avoided, resulting in a particularly long service life. Furthermore, it is particularly preferred that a flexible ring is arranged in the gap between the support and the overvoltage discharger, the axis of rotation of which is substantially parallel to the longitudinal direction. This buffers lateral forces with a component perpendicular to the longitudinal direction. For example, lateral forces can be significant during the transport of the conductor assembly. By buffering these lateral forces, the service life of the conductor assembly is particularly long.
[0007] Preferably, the overvoltage discharger has a contact cover disposed at the longitudinal end of the overvoltage discharger facing the electrical conductor, and a moving connection and, in particular, a void portion are disposed within the contact cover. The contact cover may be conductive and, for example, made of metal. Particularly preferred is that the contact cover has a geometry that results in a reduction of the electric field strength to the electrical conductor and to ground. For this purpose, the contact cover may, for example, have rounded corners.
[0008] The conductor device preferably has a conductive member designed to electrically connect the support to an overvoltage discharger, particularly to a contact cover. The support may have a conductive contact at its longitudinal end facing the overvoltage discharger, which contacts the conductive member. This prevents partial discharge at the contact, thereby extending the service life of the conductor device. Partial discharge at the contact is thus avoided. Particularly preferably, the conductive member is a contact spring, particularly a helical spring, or a socket with an inwardly projecting tab.
[0009] Preferably, the conductor device has a fixed connection, by means of which the support is fixedly installed at the electrical conductor.
[0010] Preferably, the conductor device has a conductive contact plate arranged longitudinally between the support and the electrical conductor, and the electrical conductor is electrically connected to the overvoltage discharger via the contact plate in the operating state. It is conceivable that the contact plate contacts the electrical conductor. Particularly preferably, the support is fixedly screwed to the contact plate. Furthermore, it is preferred that the contact plate is fixedly mounted at the electrical conductor. This can be achieved, for example, by screwing the contact plate to the electrical conductor. The fixed connection can be formed, for example, by screwing the contact plate to the support and the contact plate to the electrical conductor. The overvoltage discharger particularly preferably has a conductor connection that is at least partially movably arranged relative to the remaining overvoltage discharger and is therefore designed for switching the overvoltage discharger between an operating state and a test state, wherein the conductor connection is farther from the remaining overvoltage discharger in the operating state than in the test state, wherein the contact plate has a contact recess and the conductor connection has a contact pin arranged in the contact recess in the operating state and outside the contact recess in the test state. The conductors connect to the contact plate, and the conductors and electrodes are electrically connected to each other.
[0011] The overvoltage discharger preferably has one or more rheostats. Multiple rheostats can be connected in series and / or in parallel. One or more rheostats can be electrically connected to a conductor during operation. The one or more rheostats can be, for example, metal oxide rheostats (MOV).
[0012] The conductor assembly preferably has a housing that encloses the electrical conductor, overvoltage discharger, and support components. This type of conductor assembly is suitable for locations where it is not feasible to implement the electrical conductor as an overhead line, such as in power plants or substations. The electrical conductor is particularly preferably supported by the housing and / or by walls within the housing that separate two chambers from each other. Attached Figure Description
[0013] The invention will now be described in more detail with reference to the accompanying schematic diagram. Figure 1 The cross-section of the conductor device is shown. Detailed Implementation
[0014] As from Figure 1As can be seen, the conductor device 1 includes: an electrical conductor 2; an overvoltage discharger 3 having a longitudinal direction 12, an operating state, and a test state, wherein in the operating state, the overvoltage discharger 3 is designed to limit overvoltages occurring in the electrical conductor 2, and in the test state, the overvoltage discharger 3 is not designed to limit overvoltages; and an electrically insulating support 6 arranged in the longitudinal direction 12 between the overvoltage discharger 3 and the electrical conductor 2, wherein the support 6 is supported by the electrical conductor 2 and the overvoltage discharger 3 is supported by the support 6. The overvoltage discharger 3 may have a longitudinal end opposite to the electrical conductor 2, which is conductively connected to a ground 11. The conductor 2 may, for example, be designed to conduct current at voltages higher than 1 kV or higher than 100 kV.
[0015] The figure also shows that the conductor device 1 may have a fixed connection 6d, by which the support member 6 is fixedly mounted on the electrical conductor 2. The conductor device 1 may have a contact plate 4, which is arranged in the longitudinal direction 12 between the support member 6 and the electrical conductor 2, and the electrical conductor 2 is electrically connected to the overvoltage discharger 3 through the contact plate in the operating state. The figure shows that the contact plate 4 may have a first end that contacts the electrical conductor 2 and a second end that contacts the support member 6. The contact plate 4 may be fixedly connected to the electrical conductor 2. For this purpose, the contact plate 4 may be tightened to the electrical conductor 2. Thus, the electrical conductor 2 indirectly supports the support member 6 through the contact plate 4. To establish the fixed connection 6d, the contact plate 4 may first be tightened to the support member 6, and then the support plate 4 may be tightened to the electrical conductor 2.
[0016] As can be seen from the figure, the overvoltage discharger 3 may have a conductor connection 7, which is arranged at least partially movably relative to the remaining overvoltage discharger 3 and is therefore designed for switching the overvoltage discharger 3 between an operating state and a test state, wherein the conductor connection 7 is farther from the remaining overvoltage discharger 3 in the operating state than in the test state. The conductor connection 7 may, for example, have a conductive contact pin 7a. In the operating state, the contact pin 7a may contact the contact plate 4 and is particularly introduced into a contact recess 7b arranged in the contact plate 4, as also shown in the figure. In the test state, the contact pin 7a may be arranged outside the contact recess 7b. The conductor connection 7 may have an actuator 7c, which is designed to move the contact pin 7a away from the electrical conductor 2 to bring the overvoltage discharger 3 into the test state, and to move the contact pin 7a toward the electrical conductor 2 to bring the overvoltage discharger 3 into the operating state. The conductor connection may have a drive rod 7d, a hand crank 7e, and a transmission mechanism designed to convert rotation of the hand crank 7e into longitudinal displacement of the drive rod 7d. The drive rod 7d may be coupled to a contact pin 7a such that longitudinal displacement of the drive rod 7d results in longitudinal displacement of the contact pin 7a.
[0017] The conductor device 1 may have a kinematic connection 6e, through which the overvoltage discharger 3 and the support member 6 are coupled to each other, such that the support member 6 can move relative to the overvoltage discharger 3 in the longitudinal direction 12. The overvoltage discharger 3 may have a recess 6c, which is arranged at the longitudinal end of the overvoltage discharger 3 facing the electrical conductor 2, and the first longitudinal end of the support member 6 is arranged in the recess. In the recess 6c, a flexible ring 6f may be arranged between the support member 6 and the overvoltage discharger 3, the axis of rotation of which is substantially parallel to the longitudinal direction 12. By providing the ring 6f, the support member 6 can move relative to the overvoltage discharger 3 in the longitudinal direction 12, such that the support member 6 or the overvoltage discharger 3 slides at the ring 6f. The ring 6f may, for example, be made of PTFE or composed of PTFE. To secure the ring 6f, the support member 6 or the overvoltage discharger 2 may have a groove into which the ring 6f is introduced. It is also conceivable to provide multiple rings 6f and provide a groove for each ring 6f. The figure also shows that a gap 6h can be provided between the overvoltage discharger 3 and the support 6 in the longitudinal direction 12.
[0018] The overvoltage discharger 3 may have a contact cover 5a, which is arranged at the longitudinal end of the overvoltage discharger 3 facing the electrical conductor 2, and a gap 6c is arranged in the contact cover. The contact cover 5a may be conductive.
[0019] The conductor device 1 may have a conductive member designed to electrically connect the support 6 to the overvoltage discharger 3, particularly to the contact cover 5a. The conductive member may be arranged in the recess 6c. The conductive member may, for example, contact the contact 5b and the overvoltage discharger 3, particularly the contact cover 5a. In a first example, the conductive member may be a contact spring 6g. The contact spring 6g may, for example, be a helical spring. The helical spring may, for example, be designed without a longitudinal end, i.e., in the form of a closed loop. In a second example, the conductive member may be a socket with an inwardly projecting sheet. The first longitudinal end of the support 6 may be accommodated in this socket. Furthermore, the axis of rotation of the socket may be substantially parallel to the longitudinal direction 12.
[0020] The figure shows that the support member 6 may have a supporting insulator 6a and a contact 6b. The supporting insulator is arranged at the longitudinal end of the support member 6 facing the electrical conductor 2, and the contact is arranged at the longitudinal end of the support member 6 away from the electrical conductor 2. The supporting insulator 6a may be electrically insulating. For this purpose, the supporting insulator 6a may be made of resin or composed of resin, wherein the resin may be a casting resin. Alternatively, the supporting insulator may be made of ceramic material or composed of ceramic material. The contact 6b may be conductive. The contact 6b may be arranged in the void 6c. The supporting insulator 6a may also have an electrode (not shown) inside at its longitudinal end away from the electrical conductor 2, which is conductively connected to the contact 6b. This prevents partial discharge.
[0021] The figure shows that the overvoltage discharger 3 may have one or more rheostats 5b. The rheostats 5b may be metal oxide rheostats (MOV). The rheostats 5b may be arranged at the longitudinal end of the contact cover 5a away from the conductor 2. The longitudinal end of the rheostats 5b away from the contact cover 5a may be electrically connected to ground 11. The figure also shows that the overvoltage discharger 3 may additionally have an active component 5 in addition to the conductor connection 7, wherein the active component 5 has a contact cover 5a and one or more rheostats 5b.
[0022] As can be seen from the figure, the conductor device 1 may have a housing 8 that encapsulates the electrical conductor 2, the overvoltage discharger 3, and the support 6. The electrical conductor 2 may be supported by the housing 8 and / or by walls within the housing 8 that separate two chambers from each other. The housing 8 may also be part of a grounding 11. The conductor device 1 may have a sheath insulator 9 designed to hold the electrical conductor 2 and insulate it from the housing 8. The sheath insulator 9 may have an electrode 9a to which the electrical conductor 2 is electrically mounted. Furthermore, the conductor device 1 may have an adapter ring 10 that screws between the housing 8 and the sheath insulator 9, wherein the sheath insulator 9 insulates the electrical conductor 2 against the adapter ring 10. The electrode 9a may be cast into a resin in the sheath insulator 9. The resin may be, for example, epoxy resin.
[0023] As shown in the figure, the longitudinal direction 12 is arranged in the horizontal direction. Alternatively, it is conceivable that the longitudinal direction 12 may have a component in the vertical direction or be arranged in the vertical direction.
Claims
1. A conductor device having a housing (8), a bushing insulator (9), an electrical conductor (2), an overvoltage discharger (3), and an electrically insulating support (6), the overvoltage discharger having a longitudinal direction (12), an operating state, and a test state, wherein in the operating state the overvoltage discharger (3) is designed to limit overvoltages occurring in the electrical conductor (2), and in the test state the overvoltage discharger (3) is not designed to limit overvoltages, and the support is arranged in the longitudinal direction (12) between the overvoltage discharger (3) and the electrical conductor (2), wherein, The support member (6) is supported by the electrical conductor (2) and the overvoltage discharger (3) is supported by the support member (6), wherein the bushing insulator (9) is designed to hold the electrical conductor (2) and insulate the electrical conductor from the housing (8), wherein the overvoltage discharger (3) has a conductor connection (7) which is arranged at least partially movable relative to the remaining overvoltage discharger (3) and is therefore designed to switch the overvoltage discharger (3) between the operating state and the test state, wherein the conductor connection (7) is farther from the remaining overvoltage discharger (3) in the operating state than in the test state.
2. The conductor device according to claim 1, wherein, The conductor device (1) has a motion connection (6e) by means of which the overvoltage discharger (3) and the support (6) are coupled to each other, such that the support (6) is movable relative to the overvoltage discharger (3) in the longitudinal direction (12).
3. The conductor device according to claim 2, wherein, A gap (6h) is provided between the overvoltage discharger (3) and the support (6) in the longitudinal direction (12).
4. The conductor device according to claim 2 or 3, wherein, The overvoltage discharger (3) has a void (6c) arranged at the longitudinal end of the overvoltage discharger (3) facing the electrical conductor (2), and the first longitudinal end of the support member (6) is arranged in the void. In the void (6c), a flexible ring (6f) is arranged between the support member (6) and the overvoltage discharger (3), and the axis of rotation of the flexible ring is substantially parallel to the longitudinal direction (12).
5. The conductor device according to claim 2 or 3, wherein, The overvoltage discharger (3) has a contact cover (5a) arranged at the longitudinal end of the overvoltage discharger (3) facing the electrical conductor (2), and the motion connection (6e) is arranged in the contact cover.
6. The conductor device according to any one of claims 1 to 3, wherein, The conductor device (1) has a conductive member designed to conductively connect the support (6) to the overvoltage discharger (3).
7. The conductor device according to claim 6, wherein, The conductive component is a contact spring (6g) or a socket with an inwardly protruding sheet.
8. The conductor device according to any one of claims 1 to 3, wherein, The conductor device (1) has a fixed connection (6d), and the support (6) is fixedly installed at the electrical conductor (2) by means of the fixed connection.
9. The conductor device according to any one of claims 1 to 3, wherein, The conductor device (1) has a conductive contact plate (4) arranged in the longitudinal direction (12) between the support (6) and the electrical conductor (2), and the electrical conductor (2) is electrically connected to the overvoltage discharger (3) through the contact plate in the operating state.
10. The conductor device according to claim 9, wherein, The support (6) is fixedly tightened to the contact plate (4).
11. The conductor device according to claim 9, wherein, The overvoltage discharger (3) has a conductor connection (7) which is at least partially movable relative to the remaining overvoltage discharger (3) and is therefore designed to switch the overvoltage discharger (3) between the operating state and the test state, wherein the conductor connection (7) is farther from the remaining overvoltage discharger (3) in the operating state than in the test state, wherein the contact plate (4) has a contact gap (7b) and the conductor connection (7) has a contact pin (7a) which is arranged in the contact gap (7b) in the operating state.
12. The conductor device according to any one of claims 1 to 3, wherein, The overvoltage discharger (3) has one or more rheostats (5b).
13. The conductor device according to any one of claims 1 to 3, wherein, The conductor device (1) has a housing (8) that encapsulates the electrical conductor (2), the overvoltage discharger (3) and the support (6).
14. The conductor device according to claim 13, wherein, The electrical conductor (2) is supported by the housing (8) and / or by the walls that separate the two chambers from each other in the housing (8).