CN101807472B - Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer - Google Patents
Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer Download PDFInfo
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- CN101807472B CN101807472B CN2009100461721A CN200910046172A CN101807472B CN 101807472 B CN101807472 B CN 101807472B CN 2009100461721 A CN2009100461721 A CN 2009100461721A CN 200910046172 A CN200910046172 A CN 200910046172A CN 101807472 B CN101807472 B CN 101807472B
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Abstract
The invention discloses a vacuum tube group for replacing a copper-tungsten contact group of an on-load tap changer, which comprises three vacuum tube group units, wherein each vacuum tube group is a one-phase vacuum tube transitional switching unit; three-phase vacuum tube group units are arranged on the circumference by 120 degrees; and each phase vacuum tube transitional switching unit consists of four vacuum tubes which are distributed according to the circumference. The on-load tap changer generates electric arc only in the vacuum tube during switching without generating electric arc outside the vacuum tubes, thereby no electric arc is generated in an oil chamber of the on-load tap changer and oil of insulated transformer in the oil chamber cannot be polluted by electric arc; and the invention can maintain the insulating performance of the oil in the transformer for a long term, greatly reduce the fault rate of the changer, simultaneously reduce the maintenance of the changer and material loss and prolong the service life of the changer and the transformer.
Description
Technical field
The present invention relates to the on load tap changer technical field of power transformer, particularly a kind of vacuum bubbles group of replacing existing on load tap changer copper tungsten contact group makes the actual vacuum on-load operation switch that become of on load tap changer.
Background technology
On load tap changer is used for power transformer or industrial transformers, does not carry out tap under the situation of interrupt load electric current (situation of carrying is promptly arranged) at transformer, changes the turn ratio of transformer, thus the output voltage of adjustment transformer.
Combined loaded tap-changer wherein, the tap selector that under belt current situation not, is carried out preselected tap position by the diverter switch of a belt current conversion and combines.Diverter switch comprises switch core and diverter switch grease chamber, and switch core is mainly by the diverter switch insulating cylinder, upper and lower flange; Form columnar three arcs, spring energy-storage quick mechanism, transmission central shaft; Decide contact for two groups that are fixed on the every arc; One group of neutral point contact, the two pairs of bullet contacts and transition resistance, the contact switching mechanism is formed.
The contact switching mechanism has comprised the main contact part and the transition contact part that plays transition conducting effect of long-term through-flow effect; The spring energy-storage quick mechanism has driven the main contact part of long-term through-flow effect and has moved according to changeover program with the transition contact part that plays transition conducting effect through the center power transmission shaft, accomplish and switch.
The transition contact part comprises main switching contact and transition contact again; Main switching contact and transition contact are commonly called as on load tap changer and are " mahjong " contact; The employing copper-tungsten is processed, though have the advantage that the life-span is long, connecting-disconnecting function is strong, but still have following problem:
1. transition contact and main switching contact and the break-make of deciding contact produce electric arc, cause transition contact, main switching contact scaling loss, cause the shunting switch life-span short, and accident of power supply also takes place simultaneously easily.
2. transition contact, main switching contact and the electric arc deciding to produce between the contact pollute the transformer oil in the diverter switch grease chamber easily, shortened the maintenance period of the indoor transformer oil of circuit-breaker oil, have increased the physical deterioration that maintenance load and maintenance produce.
Summary of the invention
Technical problem to be solved by this invention is to use the copper tungsten contact group in the existing on load tap changer switch core of vacuum bubbles group replacement, thereby reach the indoor no electric arc generation of loaded tap switch oil.
Technical problem to be solved by this invention can realize through following technical scheme:
A kind of vacuum bubbles group of replacing on load tap changer copper tungsten contact group comprises three groups of vacuum bubbles groups, and each group vacuum bubbles group unit is a phase vacuum bubbles transition switch unit, and 120 ° of layouts are pressed in three-phase vacuum bubbles group unit on circumference.
Each phase vacuum bubbles transition switch unit is made up of 4 vacuum bubbles, and 4 vacuum bubbles are also by circle distribution, and wherein two vacuum bubbles strip resistance transition replaces former two copper tungsten transition contacts; Two vacuum bubbles non-resistances transition in addition substitutes former two copper tungsten master switching contacts.
In a preferred embodiment of the invention, 4 vacuum bubbles upper ends in each phase vacuum bubbles transition switch unit are communicated with through the arc conductive plate that is contained in the train wheel bridge, and the arc conductive plate is communicated with the neutral point contact; Said 2 vacuum bubbles lower ends that play a transition role link to each other with corresponding transition resistance; Push rod upper hinge in each vacuum bubbles lower end has a lever, and the fulcrum hinge of said lever is on a U-shaped support, and said U-shaped support is installed on the lower plate, is equipped with one at the other end of said lever and bumps wheel; Under the control of plane cam track, realize the conducting and the disconnection of vacuum bubbles.
The switch core of on load tap changer of the present invention with vacuum bubbles as transition element; Avoided copper tungsten transition contact, copper tungsten master switching contact scaling loss in the former on load tap changer that the switch electric life is influenced; Avoided the pollution of electric arc simultaneously, reduced the maintenance and the material consumption amount of switch transformer oil in the switch grease chamber.
Description of drawings
Concrete characteristic of the present invention is further described by following embodiment and accompanying drawing thereof, wherein:
Fig. 1 is the employed three-phase vacuum bubbles of an on load tap changer switch core of the present invention group mounting structure sketch map.
Fig. 2 is a wherein phase vacuum bubbles group mounting structure sketch map of on load tap changer switch core of the present invention.
Fig. 3 presses the circumference sketch map on load tap changer switch core three-phase vacuum bubbles group of the present invention.
Fig. 4 is existing each mutually former copper tungsten contact conversion program sketch map.
Fig. 5 is the present invention's one phase vacuum bubbles transition switch unit conversion program sketch map.
Fig. 6 is an existing phase copper tungsten contact and the present invention one vacuum bubbles transition switch unit conducting program sketch map mutually.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand that below in conjunction with concrete diagram, a nearly step is set forth the present invention.
Like Fig. 1, Fig. 2, shown in Figure 3, the switch core of on load tap changer of the present invention is divided into three groups of vacuum bubbles group unit by 12 vacuum bubbles, and the three-phase copper tungsten contact of the existing on load tap changer of replacement switches.
12 vacuum bubbles 620 are arranged between the upper and lower clamping plate by circumference, and per 4 vacuum bubbles 620 are one group, constitute a phase vacuum bubbles transition switch unit.The upper end of 4 vacuum bubbles V1 of each phase vacuum bubbles transition switch unit, V2, V3, V4 is communicated with by the arc conductive plate 610 that is contained in the train wheel bridge (not shown), and arc conductive plate 610 is connected with neutral point contact 230; Push rod 630 upper hinges in each vacuum bubbles 620 lower end have a lever 640, and the fulcrum hinge of lever 640 is on a U-shaped support 650, and U-shaped support 650 is installed on the lower plate 220, are equipped with one at the other end of lever 640 and bump wheel 660; Under the control of plane cam track 240,4 vacuum bubbles V1, V2, V3, V4 of each phase vacuum bubbles transition switch unit move according to changeover program, realize conducting and disconnection.
Referring to Fig. 2; Each phase vacuum bubbles transition switch unit is made up of 4 vacuum bubbles V1, V2, V3, V4; 4 vacuum bubbles V1, V2, V3, V4 also press circle distribution; Two vacuum bubbles V1, the V4 of each phase vacuum bubbles transition switch unit both sides are main break-make vacuum bubbles, and the non-resistance transition substitutes former two copper tungsten master switching contacts; Two vacuum bubbles V2, V3 in the middle of each phase vacuum bubbles transition switch unit are the transition vacuum bubbles, and the strip resistance transition replaces former two copper tungsten transition contacts.
Referring to Fig. 4, during the action of the switch core of existing on load tap changer, copper tungsten master switching contact K1 connects; When main contact M1 broke off, copper tungsten transition contact K2 connected, and then copper tungsten transition contact K3 connects; Copper tungsten transition contact K2 breaks off, and then copper tungsten master switching contact K4 connects, and copper tungsten transition contact K3 breaks off; Main contact M2 connects, and copper tungsten master switching contact K4 breaks off, and accomplishes the switching of main contact from N to the N+1 contact.
Referring to Fig. 5, during the action of the switch core of on load tap changer of the present invention, the vacuum bubbles V1 that plays main on-off action connects; When main contact M1 broke off, the vacuum bubbles V2 that plays a transition role connected, and the vacuum bubbles V3 that then plays a transition role connects; The vacuum bubbles V2 that plays a transition role breaks off, and the vacuum bubbles V4 that has followed main on-off action again connects, and the vacuum bubbles V3 that plays a transition role breaks off; Main contact M2 connects, and the vacuum bubbles V4 that plays main on-off action breaks off, and accomplishes the switching of main contact from N to the N+1 contact.
Referring to Fig. 6; The conducting program of the present invention's one phase vacuum bubbles transition switch unit and existing on load tap changer one the conducting program of copper tungsten contact is identical mutually; Therefore substitute existing on load tap changer copper tungsten contact group with vacuum bubbles, say it is feasible fully from principle; In actual moving process, avoided the copper tungsten transition contact in the on load tap changer, copper tungsten master switching contact scaling loss that the switch electric life is influenced; Avoided the pollution of electric arc simultaneously, reduced the maintenance and the material consumption amount of switch transformer oil in the switch grease chamber.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments, and that describes in the foregoing description and the specification just explains principle of the present invention, under the prerequisite that does not break away from spirit and scope of the invention; The present invention also has various changes and modifications; Also can comprise 2 or 3 vacuum bubbles like each phase vacuum bubbles transition switch unit, wherein 1 vacuum bubbles plays a transition role, residual vacuum puff on-off action.Also be distributed on the same plane like each vacuum bubbles in the three-phase vacuum bubbles transition switch unit and vertical with the central axis of transmission central shaft or the like, these variations and improving all fall in the scope of the invention that requires protection.The present invention requires protection range to be defined by appending claims and equivalent thereof.
Claims (4)
1. a vacuum bubbles group of replacing on load tap changer copper tungsten contact group is characterized in that, comprises three groups of vacuum bubbles group unit, and each group vacuum bubbles group unit is a phase vacuum bubbles transition switch unit, and 120 ° of layouts are pressed in three-phase vacuum bubbles group unit on circumference;
4 vacuum bubbles upper ends in each phase vacuum bubbles transition switch unit are communicated with through the arc conductive plate that is contained in the train wheel bridge, and the arc conductive plate is communicated with the neutral point contact; 2 vacuum bubbles lower ends that play a transition role link to each other with corresponding transition resistance; Push rod upper hinge in each vacuum bubbles lower end has a lever, and the fulcrum hinge of said lever is on a U-shaped support, and said U-shaped support is installed on the lower plate, is equipped with one at the other end of said lever and bumps wheel; Under the control of plane cam track, realize the conducting and the disconnection of vacuum bubbles.
2. vacuum bubbles group as claimed in claim 1 is characterized in that, each phase vacuum bubbles transition switch unit is made up of 4 vacuum bubbles, and 4 vacuum bubbles are also by circle distribution.
3. vacuum bubbles group as claimed in claim 2 is characterized in that, wherein two vacuum bubbles strip resistance transition replaces former two copper tungsten transition contacts, in the switch handoff procedure, plays a transition role.
4. vacuum bubbles group as claimed in claim 2 is characterized in that, wherein two vacuum bubbles non-resistances transition substitutes former two copper tungsten master switching contacts; In the switch handoff procedure, play main on-off action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100461721A CN101807472B (en) | 2009-02-13 | 2009-02-13 | Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100461721A CN101807472B (en) | 2009-02-13 | 2009-02-13 | Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer |
Publications (2)
| Publication Number | Publication Date |
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| CN101807472A CN101807472A (en) | 2010-08-18 |
| CN101807472B true CN101807472B (en) | 2012-08-08 |
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| CN2009100461721A Active CN101807472B (en) | 2009-02-13 | 2009-02-13 | Vacuum tube group for replacing copper-tungsten contact group of on-load tap changer |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112013017920A2 (en) * | 2011-02-12 | 2019-09-24 | Reinhausen Maschf Scheubeck | tap-changer having a selector and a load-changer for uninterrupted switching between different tappings and winding of a step-down transformer |
| DE102011014325B4 (en) * | 2011-03-18 | 2014-11-27 | Maschinenfabrik Reinhausen Gmbh | OLTC |
| CN103187183A (en) * | 2013-04-19 | 2013-07-03 | 浙江腾龙电器有限公司 | Oil immersion type double-layer contact vacuum on-load voltage regulation tapping switch for intelligent distribution network |
| EP3322218A1 (en) | 2014-03-21 | 2018-05-16 | MediaTek Singapore Pte. Ltd. | Cell selection and reselection for low cost machine-type communication ue |
| CN103956296B (en) * | 2014-04-25 | 2016-08-24 | 国家电网公司 | A kind of driving means for controlling vacuum on-load operation switch vacuum tube |
| CN104934257B (en) * | 2015-07-19 | 2017-07-21 | 上海华明电力设备制造有限公司 | Vacuum inductance type on-load tap-changer |
| CN112071672B (en) * | 2020-07-22 | 2022-10-04 | 中国电力科学研究院有限公司 | Vacuum on-load tap-changer transition device and switching method of transition device |
| CN112563052B (en) * | 2020-12-07 | 2022-07-22 | 南方电网科学研究院有限责任公司 | Control method of tap changer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258652Y (en) * | 1996-01-08 | 1997-07-30 | 张玉强 | Composite type vacuum load tapped switch |
| JP2003109829A (en) * | 2001-09-28 | 2003-04-11 | Toshiba Corp | Tap change-over unit under load |
| CN201063287Y (en) * | 2007-07-19 | 2008-05-21 | 上海华明电力设备制造有限公司 | Circular cylinder structural dry type vacuum loaded switch |
| CN101320650A (en) * | 2007-06-08 | 2008-12-10 | 上海华明电力设备制造有限公司 | Vacuum bubble system integral cell structure of vacuum on-load tapping switch |
| CN201359915Y (en) * | 2009-03-04 | 2009-12-09 | 上海华明电力设备制造有限公司 | Vacuum tube switch core of on-load tap switch |
-
2009
- 2009-02-13 CN CN2009100461721A patent/CN101807472B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258652Y (en) * | 1996-01-08 | 1997-07-30 | 张玉强 | Composite type vacuum load tapped switch |
| JP2003109829A (en) * | 2001-09-28 | 2003-04-11 | Toshiba Corp | Tap change-over unit under load |
| CN101320650A (en) * | 2007-06-08 | 2008-12-10 | 上海华明电力设备制造有限公司 | Vacuum bubble system integral cell structure of vacuum on-load tapping switch |
| CN201063287Y (en) * | 2007-07-19 | 2008-05-21 | 上海华明电力设备制造有限公司 | Circular cylinder structural dry type vacuum loaded switch |
| CN201359915Y (en) * | 2009-03-04 | 2009-12-09 | 上海华明电力设备制造有限公司 | Vacuum tube switch core of on-load tap switch |
Non-Patent Citations (1)
| Title |
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| 吴振中.新型的35kV真空有载分接开关.《电气应用》.1984,(第07期), * |
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| CN101807472A (en) | 2010-08-18 |
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