CN104953475A - Grading shield for high-voltage contact box - Google Patents
Grading shield for high-voltage contact box Download PDFInfo
- Publication number
- CN104953475A CN104953475A CN201510339620.2A CN201510339620A CN104953475A CN 104953475 A CN104953475 A CN 104953475A CN 201510339620 A CN201510339620 A CN 201510339620A CN 104953475 A CN104953475 A CN 104953475A
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- CN
- China
- Prior art keywords
- grading shield
- contact
- contact box
- box
- grading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/14—Shutters or guards for preventing access to contacts
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses a grading shield for a high-voltage contact box. The grading shield is arranged on a three-phase contact box; all side walls of a box body stretch in the same direction to respectively form a wire outlet groove; busbars are arranged in the wire outlet grooves; the grading shield is arranged in a movable contact arm motion cavity; fixed ends of the busbars are arranged in the grading shield; the bottom surface of the grading shield is connected with a fixed contact installation insert; containing cavities are formed in the grading shield; fixed contacts and movable contacts are arranged in the containing cavities. The grading shield disclosed by the invention has the beneficial effects that the grading shield is arranged in an inner cavity of the contact box, a certain gap is reserved between the grading shield and the cylindrical wall of the contact box, the bottom surface of the grading shield is matched with each movable contact and each fixed contact so that the grading shield, each movable contact and each fixed contact are used as an integrated electric conducting piece, inter-phase insulation strength can be ensured on the premise that the structure of the contact box body is not changed, a homogeneous electric field is achieved on the basis that an existing design of the contact box is changed and the inter-phase insulation level is ensured, and the local discharge voltage is increased.
Description
Technical field
The present invention relates to a kind of high-voltage contact box grading shield, belong to distribution network technology field.
Background technology
Along with the fast development of electric utility, Guo Wang company also becomes more and more higher to the designing requirement of switch cubicle, and one of them is that the partial discharge quantity of requirement single-piece insulating part must meet and is less than 3pC.For this reason, there are a kind of three facies tract shielding contact boxes in known field, this contact box is an inner pre-buried tubbiness grading shield, to reach the distribution of even contact box internal electric field, improves insulating part partial discharge voltage.But, the negative effect that this improvement brings is: although the 1 even electric field at the dynamic and static contacts mates place of high-pressure side, due to grading ring pre-buried in insulating barrier, reduces alternate insulation distance, reduce the withstand voltage that contact box is alternate, easily cause alternate electric discharge; 2, because grading ring is embedded in epoxy material, add the technique controlling difficulty that both combine, if grading ring surface treatment is slightly bad, easily causes between grading ring and epoxy material and there is small air gap, thus reduce the partial discharge voltage of contact box.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of high-voltage contact box grading shield, can existing contact box structure do not changed, and when phase insulation distance, have and can improve single contact box partial discharge voltage, the advantage of phase spacing can not be reduced again.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of high-voltage contact box grading shield, be arranged on three-phase contact box, described three-phase contact box comprise be set up in parallel three three-phase box bodys, supporting bracket, acting arm motion chamber, inserts and busbar, it is characterized in that, the sidewall of each described box body extends a line outlet groove in the same way; Busbar is provided with in described line outlet groove; Described grading shield is arranged in described acting arm motion chamber; The stiff end of described busbar is arranged in grading shield; Described grading shield bottom surface is connected with fixed contact and installs inserts; Containing cavity is provided with in described grading shield; Fixed contact and moving contact is provided with in described containing cavity.
Aforesaid a kind of high-voltage contact box grading shield, is characterized in that, the wall of described containing cavity is provided with louvre.
Aforesaid a kind of high-voltage contact box grading shield, is characterized in that, be provided with gap between described grading shield and contact box, the size in described gap is empirically worth setting.
The beneficial effect that the present invention reaches: grading shield is located in contact box inner chamber, grading shield and contact box barrel is made to retain certain gap, the bottom surface of grading shield coordinates electric-conductor as a whole with dynamic/static contact, phase insulation intensity is guaranteed under the prerequisite not changing contact box body construction, changing the existing design of contact box and the basis of guaranteeing phase insulation level reaching uniform electric field, improve partial discharge voltage.
Accompanying drawing explanation
Fig. 1 is longitudinal sectional structure schematic diagram of the present invention.
Fig. 2 is the A-A sectional structure schematic diagram of Fig. 1.
Fig. 3 is the three-view diagram of grading shield.
Fig. 4 is longitudinal sectional structure schematic diagram of the contact box supporting with Fig. 3 and auxiliary equipment thereof.
The implication of Reference numeral in figure:
1-box body, 2-supporting bracket, 3-acting arm motion chamber, 4-inserts, 5-busbar, 6,7,8-grading shield, 61-dynamic/static contact containing cavity, 62-louvre, 63-line outlet groove, 64-fixing hole, 9-fixed contact, 10-moving contact.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
A kind of high-voltage contact box grading shield involved in the present invention, is arranged on three-phase contact box.Here three-phase contact box structure as depicted in figs. 1 and 2, comprises three the three-phase box bodys 1, supporting bracket 2, acting arm motion chamber 3, inserts 4 and the busbar 5 that are set up in parallel and forms.The sidewall of each box body 1 extends a line outlet groove 63 in the same way, is provided with busbar 5 in line outlet groove 63.
Be arranged on by grading shield in acting arm motion chamber 3, the stiff end of busbar 5 is arranged in grading shield, and in grading shield, be provided with the line outlet groove 63 matched.Grading shield bottom surface is connected with fixed contact and installs inserts 4, and has fixing hole 64.Be provided with dynamic/static contact containing cavity 61 in grading shield, in dynamic/static contact containing cavity 61, be provided with fixed contact 9 and moving contact 10.The wall of dynamic/static contact containing cavity is provided with louvre 62 so that heat radiation.
The bottom surface of grading shield and moving contact 10, fixed contact 9 cooperatively interact, grading shield contacts with the bottom surface of fixed contact, moving contact 10 and fixed contact 9 cooperatively interact, three's mutual conduction, become overall electric-conductor, under the prerequisite not changing contact box body construction, partial discharge voltage can be improved, and guarantee phase insulation intensity.
Be provided with gap between grading shield and contact box, the size in gap is empirically worth setting here, thus changing the existing design of contact box and the basis of guaranteeing phase insulation level reaching uniform electric field, improves the object of partial discharge voltage.
As shown in Figure 3 and Figure 4, different according to high-voltage contact box structure, the structure of grading shield can make corresponding changes, and namely according to the needs receiving busbar, respectively the channel path of grading shield can be done corresponding amendment.But no matter how channel path changes, therefore mounting means and the Electric Field Distribution pattern of grading shield and contact box, busbar 5, moving contact 10, fixed contact 9 can not change.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (3)
1. a high-voltage contact box grading shield, be arranged on three-phase contact box, described three-phase contact box comprise be set up in parallel three three-phase box bodys, supporting bracket, acting arm motion chamber, inserts and busbar, it is characterized in that, the sidewall of each described box body extends a line outlet groove in the same way; Busbar is provided with in described line outlet groove; Described grading shield is arranged in described acting arm motion chamber; The stiff end of described busbar is arranged in grading shield; Described grading shield bottom surface is connected with fixed contact and installs inserts; Containing cavity is provided with in described grading shield; Fixed contact and moving contact is provided with in described containing cavity.
2. a kind of high-voltage contact box grading shield according to claim 1, is characterized in that, the wall of described containing cavity is provided with louvre.
3. a kind of high-voltage contact box grading shield according to claim 1, is characterized in that, be provided with gap between described grading shield and contact box, the size in described gap is empirically worth setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339620.2A CN104953475A (en) | 2015-06-18 | 2015-06-18 | Grading shield for high-voltage contact box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339620.2A CN104953475A (en) | 2015-06-18 | 2015-06-18 | Grading shield for high-voltage contact box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104953475A true CN104953475A (en) | 2015-09-30 |
Family
ID=54167942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510339620.2A Pending CN104953475A (en) | 2015-06-18 | 2015-06-18 | Grading shield for high-voltage contact box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104953475A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587390A (en) * | 1985-01-07 | 1986-05-06 | Golden Gate Switchboard Co. | Vacuum circuit breaker |
| CN201061088Y (en) * | 2007-06-28 | 2008-05-14 | 玉环县华通电器有限公司 | Modified contact box |
| CN201230151Y (en) * | 2008-07-14 | 2009-04-29 | 河南森源电气股份有限公司 | Electric field shielding construction for 35kV contact box |
| CN204732687U (en) * | 2015-06-18 | 2015-10-28 | 国家电网公司 | A kind of high-voltage contact box grading shield |
-
2015
- 2015-06-18 CN CN201510339620.2A patent/CN104953475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587390A (en) * | 1985-01-07 | 1986-05-06 | Golden Gate Switchboard Co. | Vacuum circuit breaker |
| CN201061088Y (en) * | 2007-06-28 | 2008-05-14 | 玉环县华通电器有限公司 | Modified contact box |
| CN201230151Y (en) * | 2008-07-14 | 2009-04-29 | 河南森源电气股份有限公司 | Electric field shielding construction for 35kV contact box |
| CN204732687U (en) * | 2015-06-18 | 2015-10-28 | 国家电网公司 | A kind of high-voltage contact box grading shield |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150930 |