CN116435132A - Longitudinal magnetic contact structure of vacuum arc-extinguishing chamber of on-load tap-changer and working method - Google Patents
Longitudinal magnetic contact structure of vacuum arc-extinguishing chamber of on-load tap-changer and working method Download PDFInfo
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- CN116435132A CN116435132A CN202310450357.9A CN202310450357A CN116435132A CN 116435132 A CN116435132 A CN 116435132A CN 202310450357 A CN202310450357 A CN 202310450357A CN 116435132 A CN116435132 A CN 116435132A
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- iron core
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- annular iron
- fixed contact
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- 238000000034 method Methods 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 128
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 230000003068 static effect Effects 0.000 description 14
- 230000008033 biological extinction Effects 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer and a working method thereof, wherein the longitudinal magnetic contact structure comprises a cylindrical fixed contact rod, a fixed contact side 3/4 annular iron core, a cylindrical fixed contact, a cylindrical movable contact, a movable contact side 3/4 annular iron core and a cylindrical movable contact rod. The cylindrical fixed contact rod is fixedly connected with the cylindrical fixed contact, the 3/4 annular electrical pure iron on the fixed contact side is bonded with the cylindrical fixed contact in a high-strength manner, the cylindrical movable contact is fixedly connected with the cylindrical movable contact rod, and the 3/4 annular electrical pure iron on the movable contact side is bonded with the cylindrical movable contact in a high-strength manner. The invention utilizes the longitudinal magnetic field between the contacts to restrain the vacuum arc on the surface of the contact blade so as to achieve the purpose of reducing the splashing of metal vapor.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer and a working method.
Background
The on-load tap changer is a core component for realizing voltage regulation of a transformer by realizing switching among taps in a transformer winding under the condition of ensuring that load current is not interrupted so as to achieve the purpose of voltage regulation. The vacuum on-load tap-changer mainly realizes arc extinction by a vacuum arc-extinguishing chamber, and the arc and the hot gas are not exposed, thus greatly solving the problems of carbonization and pollution of transformer oil. Because the structure and the processing technology of the flat electrode are simple, and the free-burning vacuum arc can be kept in a diffusion state under a small current (the effective value is less than about 7 kA), the current vacuum OLTC vacuum tube of Germany MR, hitachi, switzerland and domestic flat Gao Hebao light adopts the flat electrode structure, and the open-close capability of the flat electrode structure is enough. However, because the vacuum OLTC is composed of a series of matched action switches, the vacuum OLTC has complex timing sequence coordination with each other, if the arc re-burning phenomenon occurs in the switching-on and switching-off process of the vacuum arc extinguishing chamber, the arc burning time is too long, the action arcing and ablation of the isolation contact are likely to be caused, and OLTC faults are extremely easy to cause. Therefore, ensuring the arc extinguishing capability and the breaking reliability of the vacuum arc extinguishing chamber under frequent operation is particularly important to ensuring the safe and reliable operation of the vacuum OLTC. The contact is used as an important conductive part in the vacuum arc-extinguishing chamber, the structure of the contact has great influence on the breaking capacity of a vacuum tube, the vacuum on-load tap-changer is subjected to high-frequency and large-scale electrical switching, the accumulation of hot metal vapor among the contacts in the vacuum arc-extinguishing chamber is easy to cause, and the accumulated metal vapor among the contacts is easy to splash onto a metal shielding cover and a porcelain shell to form a conductive film, so that the insulation performance of the vacuum arc-extinguishing chamber is reduced, the electrical service life of the on-load tap-changer is seriously influenced, and even the breaking failure is caused.
At present, a cylindrical flat plate electrode is often adopted by a vacuum arc-extinguishing chamber in an international vacuum on-load tap-changer to finish the extinction of an electric arc, but for the electric service life of the on-load tap-changer 36 for more than ten thousand times, the vacuum arc-extinguishing chamber is easy to cause the accumulation of electric arc and incandescent steam between contacts in the process of frequent arcing and extinction, and the accumulated high-heat metal steam can splash to a metal shielding cover and is diffused to the outside of the metal shielding cover under the driving of thermal motion, and a layer of conductive film is formed on a porcelain shell, so that the insulation performance of the vacuum arc-extinguishing chamber is reduced, and the extinction capability of the vacuum arc-extinguishing chamber is greatly influenced.
Disclosure of Invention
The invention aims to provide a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer and a working method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer comprises a cylindrical fixed contact rod, a fixed contact side 3/4 annular iron core, a cylindrical fixed contact, a cylindrical movable contact, a movable contact side 3/4 annular iron core and a cylindrical movable contact rod;
the cylindrical fixed contact is fixedly connected to one end of a cylindrical fixed contact rod, the cylindrical movable contact is fixedly connected to one end of the cylindrical movable contact rod, which is close to the cylindrical fixed contact rod, the 3/4 annular iron core on the fixed contact side is sleeved on the cylindrical fixed contact rod, the 3/4 annular iron core on the fixed contact side is bonded with the cylindrical fixed contact, the 3/4 annular iron core on the movable contact side is sleeved on the cylindrical movable contact rod, and the 3/4 annular iron core on the movable contact side is bonded with the cylindrical movable contact;
one end face of the 3/4 annular iron core on the static contact side is a spherical surface, the other end face of the 3/4 annular iron core on the static contact side is a plane, and the end face of the 3/4 annular iron core on the static contact side, which is the plane, is bonded with the cylindrical static contact; one end face of the 3/4 annular iron core on the moving contact side is a spherical surface, the other end face of the 3/4 annular iron core on the moving contact side is a plane, and the end face of the 3/4 annular iron core on the moving contact side, which is the plane, is bonded with the cylindrical moving contact.
Further, the 3/4 annular iron core at the static contact side and the 3/4 annular iron core at the moving contact side are all 3/4 annular electrical pure iron.
Further, the inner diameters of the rings in the fixed contact side 3/4 annular iron core and the moving contact side 3/4 annular iron core are consistent with the diameters of the cylindrical fixed contact rod and the cylindrical moving contact rod, and the outer diameters of the rings in the fixed contact side 3/4 annular iron core and the moving contact side 3/4 annular iron core are consistent with the diameters of the cylindrical fixed contact and the cylindrical moving contact.
Further, the spherical surface and the plane of the 3/4 annular iron core at the static contact side are tangential to the same sphere, and specifically: the distance from any point on the inner diameter of the plane side of the 3/4 annular iron core of the static contact side to the sphere center is equal to the radius of the sphere, and the distance from any point on the outer diameter of the spherical side of the 3/4 annular iron core of the static contact side to the sphere center is equal to the radius of the sphere.
Further, the plane and the spherical surface of the 3/4 annular iron core on the moving contact side are tangent to the same sphere, specifically, the distance from any point on the inner diameter of the plane side of the 3/4 annular iron core on the moving contact side to the spherical center is equal to the radius of the sphere, and the distance from any point on the outer diameter of the spherical surface side of the 3/4 annular iron core on the moving contact side to the spherical center is equal to the radius of the sphere.
Further, the plane side of the fixed contact side 3/4 annular iron core and the plane side of the movable contact side 3/4 annular iron core are oppositely arranged.
Further, the directions of annular gaps of the fixed contact side 3/4 annular iron core and the movable contact side 3/4 annular iron core are different by 180 degrees.
Further, the shape and the size of the cylindrical fixed contact rod and the cylindrical movable contact rod are consistent; the shape and the size of the cylindrical fixed contact and the cylindrical movable contact are consistent; the shape and the size of the fixed contact side 3/4 annular iron core and the movable contact side 3/4 annular iron core are consistent.
Further, in a closing state, the cylindrical fixed contact and the cylindrical movable contact are coaxially and tightly attached; and when the switch is in the switch-off state, the cylindrical fixed contact and the cylindrical movable contact are coaxially separated.
In the working method of a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer, load current flows into a cylindrical fixed contact from a cylindrical fixed contact rod in a closing state, the cylindrical fixed contact and a cylindrical moving contact are coaxially and tightly attached, the load current flows into the cylindrical moving contact rod through the cylindrical moving contact, and due to the fact that currents flow in the cylindrical fixed contact rod, the cylindrical fixed contact, the cylindrical moving contact and the cylindrical moving contact rod, a corresponding annular magnetic field is generated in space, so that a 3/4 annular iron core on the fixed contact side and a 3/4 annular iron core on the moving contact side are magnetized, a longitudinal magnetic field is generated at the attachment position of the cylindrical fixed contact and the cylindrical moving contact by the magnetized 3/4 annular iron core on the fixed contact side and the magnetized 3/4 annular iron core on the moving contact side, and when the closing state is gradually changed to an opening state, the longitudinal magnetic field cannot disappear before an electric arc is extinguished.
Compared with the prior art, the invention has the beneficial effects that:
in the use process, currents flow in the cylindrical fixed contact rod, the cylindrical fixed contact, the cylindrical movable contact and the cylindrical movable contact rod, corresponding annular magnetic fields can be generated in space, the 3/4 annular iron core on the fixed contact side and the 3/4 annular iron core on the movable contact side are magnetized, the magnetized 3/4 annular iron core on the fixed contact side and the 3/4 annular iron core on the movable contact side can generate longitudinal magnetic fields at the joint of the cylindrical fixed contact and the cylindrical movable contact, when the contact gradually changes from a closing state to a separating state, the longitudinal magnetic fields cannot disappear before an electric arc is extinguished, vacuum electric arc can be restrained on the surface of the movable contact, metal steam splashing is reduced, and the breaking capacity of a vacuum arc extinguishing chamber is improved.
In addition, because the outer circle radiuses of the fixed contact side 3/4 annular iron core and the movable contact side 3/4 annular iron core are consistent with the radiuses of the cylindrical fixed contact and the cylindrical movable contact, the longitudinal magnetic fields generated by the magnetized fixed contact side 3/4 annular iron core and the movable contact side 3/4 annular iron core at the joint plane of the cylindrical fixed contact and the cylindrical movable contact are characterized by mirror symmetry about the open position of the iron core, and the longitudinal magnetic field distribution characteristics at the central planes of the cylindrical fixed contact and the cylindrical movable contact are not changed along with the gradual increase of the open distance of the cylindrical fixed contact and the cylindrical movable contact, and the support is provided for restricting the movement of a vacuum arc under the condition of long arcing and improving the breaking capacity of vacuum arc extinction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a longitudinal magnetic contact structure of a vacuum arc-extinguishing chamber of an on-load tap-changer according to the present invention;
fig. 2 shows an arrangement mode of the 3/4 annular iron core at the fixed contact side and the 3/4 annular iron core at the movable contact side.
Wherein, 1-a cylindrical static contact rod; 2-a 3/4 annular iron core at the side of the static contact; 3-a cylindrical static contact; 4-a cylindrical moving contact; 5-a 3/4 annular iron core at the side of the movable contact; 6-a cylindrical movable contact rod.
Detailed Description
In order that those skilled in the art may better understand the present invention, a further detailed description of the present invention will be provided with reference to the accompanying drawings, which are intended to illustrate, but not to limit, the present invention.
It should be noted that the terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present invention are intended to cover a non-exclusive inclusion, such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
The utility model provides a vertical magnetic contact structure of on-load tap-changer vacuum interrupter, as shown in fig. 1, includes cylindrical fixed contact stick 1, fixed contact side 3/4 annular iron core 2, cylindrical fixed contact 3, cylindrical moving contact 4, moving contact side 3/4 annular iron core 5, cylindrical moving contact stick 6. The cylindrical fixed contact rod 1 is fixedly connected with the cylindrical fixed contact 3, the 3/4 annular electrical pure iron 2 on the fixed contact side is bonded with the cylindrical fixed contact 3 in high strength, the cylindrical moving contact 4 is fixedly connected with the cylindrical moving contact rod 6, and the 3/4 annular electrical pure iron 5 on the moving contact side is bonded with the cylindrical moving contact 4 in high strength.
The fixed contact side 3/4 annular iron core 2 and the movable contact side 3/4 annular iron core 5 are made of electrical pure iron; specifically, the fixed contact side 3/4 annular iron core 2 and the movable contact side 3/4 annular iron core 5 are composed of 3/4 annular electrical pure iron; the inner diameters of annular electrical pure iron on the fixed contact side 3/4 annular iron core 2 and the moving contact side 3/4 annular iron core 5 are consistent with the diameters of the cylindrical fixed contact rod 1 and the cylindrical moving contact rod 6, and the outer diameters of annular electrical pure iron on the fixed contact side 3/4 annular iron core 2 and the moving contact side 3/4 annular iron core 5 are consistent with the diameters of the cylindrical fixed contact 3 and the cylindrical moving contact 4; as shown in fig. 2, the upper surface and the lower surface of the 3/4 annular iron core 2 on the static contact side are tangent to the same sphere, namely, the distance from any point on the inner diameter of the lower surface of the 3/4 annular iron core 2 on the static contact side to the sphere center is equal to the radius of the sphere, and the distance from any point on the outer diameter of the upper surface of the 3/4 annular iron core 2 on the static contact side to the sphere center is equal to the radius of the sphere; the upper surface and the lower surface of the movable contact side 3/4 annular iron core 5 are tangent to the same ball, namely, the distance from any point on the inner diameter of the upper surface of the movable contact side 3/4 annular iron core 5 to the center of the ball is equal to the radius of the ball, and the distance from any point on the outer diameter of the lower surface of the movable contact side 3/4 annular iron core 5 to the center of the ball is equal to the radius of the ball; inclined surfaces of the fixed contact side 3/4 annular iron core 2 and the movable contact side 3/4 annular iron core 5 are spherical surfaces; inclined surfaces of the fixed contact side 3/4 annular iron core 2 and the movable contact side 3/4 annular iron core 5 are spherical surfaces; the spherical surface of the fixed contact side 3/4 annular iron core 2 faces upwards, and the spherical surface of the movable contact side 3/4 annular iron core 5 faces downwards; the opening direction of the fixed contact side 3/4 annular iron core 2 is 180 degrees different from the opening direction of the movable contact side 3/4 annular iron core 5; in a closing state, the cylindrical fixed contact 3 and the cylindrical movable contact 4 are coaxially and tightly attached; in the opening state, the cylindrical fixed contact 3 and the cylindrical movable contact 4 are coaxially separated.
Under the condition that an arc exists between a contact closing state or a moving contact and a fixed contact, load current flows into the cylindrical fixed contact 3 from the cylindrical fixed contact rod 1, the cylindrical fixed contact 3 and the cylindrical moving contact 4 are coaxially and tightly attached, the load current flows into the cylindrical moving contact rod 6 through the cylindrical moving contact 4, and due to the fact that currents flow in the cylindrical fixed contact rod 1, the cylindrical fixed contact 3, the cylindrical moving contact 4 and the cylindrical moving contact rod 6, a corresponding annular magnetic field can be generated in space, the fixed contact side 3/4 annular iron core 2 and the moving contact side 3/4 annular iron core 5 are magnetized, the magnetized fixed contact side 3/4 annular iron core 2 and the moving contact side 3/4 annular iron core 5 can generate a longitudinal magnetic field at the attachment position of the cylindrical fixed contact 3 and the cylindrical moving contact 4, and when the contact gradually changes from the closing state to the opening state, the longitudinal magnetic field cannot disappear before the arc is extinguished.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (10)
1. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer is characterized by comprising a cylindrical fixed contact rod (1), a fixed contact side 3/4 annular iron core (2), a cylindrical fixed contact (3), a cylindrical movable contact (4), a movable contact side 3/4 annular iron core (5) and a cylindrical movable contact rod (6);
the cylindrical fixed contact (3) is fixedly connected to one end of the cylindrical fixed contact rod (1), the cylindrical movable contact (4) is fixedly connected to one end, close to the cylindrical fixed contact rod (1), of the cylindrical movable contact rod (6), the fixed contact side 3/4 annular iron core (2) is sleeved on the cylindrical fixed contact rod (1), the fixed contact side 3/4 annular iron core (2) is bonded with the cylindrical fixed contact (3), the movable contact side 3/4 annular iron core (5) is sleeved on the cylindrical movable contact rod (6), and the movable contact side 3/4 annular iron core (5) is bonded with the cylindrical movable contact (4);
one end face of the fixed contact side 3/4 annular iron core (2) is a spherical surface, the other end face is a plane, and the end face of the fixed contact side 3/4 annular iron core (2) which is the plane is bonded with the cylindrical fixed contact (3); one end face of the moving contact side 3/4 annular iron core (5) is a spherical surface, the other end face is a plane, and the end face of the moving contact side 3/4 annular iron core (5) which is the plane is bonded with the cylindrical moving contact (4).
2. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the fixed contact side 3/4 annular iron core (2) and the movable contact side 3/4 annular iron core (5) are all 3/4 annular electrical pure iron.
3. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the annular inner diameters of the fixed contact side 3/4 annular iron core (2) and the movable contact side 3/4 annular iron core (5) are consistent with the diameters of the cylindrical fixed contact rod (1) and the cylindrical movable contact rod (6), and the annular outer diameters of the fixed contact side 3/4 annular iron core (2) and the movable contact side 3/4 annular iron core (5) are consistent with the diameters of the cylindrical fixed contact (3) and the cylindrical movable contact (4).
4. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the spherical surface and the plane of the fixed contact side 3/4 annular iron core (2) are tangential to the same sphere, in particular: the distance from any point on the inner diameter of the plane side of the 3/4 annular iron core (2) at the fixed contact side to the sphere center is equal to the sphere radius, and the distance from any point on the outer diameter of the spherical side of the 3/4 annular iron core (2) at the fixed contact side to the sphere center is equal to the sphere radius.
5. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the plane and the spherical surface of the 3/4 annular iron core (5) on the moving contact side are tangential to the same sphere, specifically, the distance from any point on the inner diameter of the plane side of the 3/4 annular iron core (5) on the moving contact side to the spherical center is equal to the radius of the sphere, and the distance from any point on the outer diameter of the spherical surface side of the 3/4 annular iron core (5) on the moving contact side to the spherical center is equal to the radius of the sphere.
6. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the plane side of the fixed contact side 3/4 annular iron core (2) and the plane side of the moving contact side 3/4 annular iron core (5) are oppositely arranged.
7. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the annular gap directions of the fixed contact side 3/4 annular iron core (2) and the moving contact side 3/4 annular iron core (5) are 180 degrees different.
8. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the cylindrical fixed contact rod (1) and the cylindrical movable contact rod (6) are consistent in shape and size; the shape and the size of the cylindrical fixed contact (3) are consistent with those of the cylindrical movable contact (4); the shape and the size of the fixed contact side 3/4 annular iron core (2) and the movable contact side 3/4 annular iron core (5) are consistent.
9. The longitudinal magnetic contact structure of the vacuum arc-extinguishing chamber of the on-load tap-changer according to claim 1, wherein the cylindrical fixed contact (3) and the cylindrical movable contact (4) are coaxially and tightly attached in a closing state; and when the switch is in the switch-off state, the cylindrical fixed contact (3) and the cylindrical movable contact (4) are coaxially separated.
10. A method according to any one of claims 1-9, characterized in that in a closed state, a load current flows from the cylindrical stationary contact rod (1) into the cylindrical stationary contact (3), and because the cylindrical stationary contact (3) and the cylindrical moving contact (4) are coaxially and tightly attached, the load current flows into the cylindrical moving contact rod (6) through the cylindrical moving contact (4), and because the currents flow in the cylindrical stationary contact rod (1), the cylindrical stationary contact (3), the cylindrical moving contact (4) and the cylindrical moving contact rod (6), a corresponding circumferential magnetic field is generated in space, and then the stationary contact side 3/4 annular iron core (2) and the moving contact side 3/4 annular iron core (5) are magnetized, and the longitudinal magnetic field is generated at the attachment position of the cylindrical stationary contact (3) and the cylindrical moving contact (4) by the magnetized stationary contact side 3/4 annular iron core (2), and does not disappear before the arc gradually changes from the closed state to the open state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310450357.9A CN116435132A (en) | 2023-04-24 | 2023-04-24 | Longitudinal magnetic contact structure of vacuum arc-extinguishing chamber of on-load tap-changer and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310450357.9A CN116435132A (en) | 2023-04-24 | 2023-04-24 | Longitudinal magnetic contact structure of vacuum arc-extinguishing chamber of on-load tap-changer and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116435132A true CN116435132A (en) | 2023-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310450357.9A Pending CN116435132A (en) | 2023-04-24 | 2023-04-24 | Longitudinal magnetic contact structure of vacuum arc-extinguishing chamber of on-load tap-changer and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116435132A (en) |
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2023
- 2023-04-24 CN CN202310450357.9A patent/CN116435132A/en active Pending
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