CN101393814A - 72.5kV indoor type high-voltage SF6 circuit breaker - Google Patents
72.5kV indoor type high-voltage SF6 circuit breaker Download PDFInfo
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- CN101393814A CN101393814A CNA2008102286402A CN200810228640A CN101393814A CN 101393814 A CN101393814 A CN 101393814A CN A2008102286402 A CNA2008102286402 A CN A2008102286402A CN 200810228640 A CN200810228640 A CN 200810228640A CN 101393814 A CN101393814 A CN 101393814A
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- arc extinguishing
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Abstract
The invention provides a high-pressure SF6 breaker of the 72.5kV indoor type. Three arc extinguishing units are assembled on a frame. Each phase of the arc extinguishing units is a single break. An electrical control part and a spring operation mechanism are mounted in a control box. Three phases of the arc extinguishing units all adopt the following technical proposal: an upper terminal board is connected with an static sensing finger seat in an arc extinguishing chamber; a static sensing finger and a static arc contact are arranged on the static sensing finger seat; the static sensing finger and the sensing fingers can be switched on or off; a movable contact is connected with a cylinder; the cylinder is connected with a middle sensing finger; the middle sensing finger is connected with a lower terminal board; the static arc contact and the movable arc contact can be connected or disconnected; the movable arc contact is connected with a piston rod; the piston rod is connected with an insulating rod in a strut porcelain sleeve; the lower end of the insulating rod is connected with the spring operation mechanism; and the arc extinguishing chamber is communicated with the inner cavity of the strut porcelain sleeve and filled with SF6 gas. The invention has the advantages of excellent switching performance, safe and reliable running, simple structure, and convenient and flexible operation.
Description
One, technical field:
The present invention relates to high voltage electric power equip ment, particularly circuit breaker.
Two, prospect technology:
Indoor three-phase alternating current 50Hz 72.5kV high-voltage electrical equipment high pressure SF
6Circuit breaker is mainly used in the protection of 72.5kV power transmission and transformation line, also can do network interconnecting circuit usefulness, and its arc extinguishing unit adopts SF
6Gas has superior break performance as arc-extinguishing medium, and is safe and reliable to operation.But the indoor electric substation of 72.5kV is owing to no indoor type product, so can only adopt outdoor type high pressure SF at present
6Circuit breaker, outdoor high-voltage SF
6Circuit breaker must be greater than the III level in order to satisfy outdoor anti-filth etc., the alternate centre-to-centre spacing of arc extinguishing unit is greater than 1100mm, the arc extinguishing unit height is greater than 2400mm, creepage distance is over the ground: 1815mm, fracture 2090mm, so volume is bigger, it is big to take up room, and the space of indoor electric substation and soil occupied area increase thereupon.
Three, summary of the invention:
The objective of the invention is to overcome above-mentioned not enough problem, a kind of indoor type high-voltage SF is provided
6Circuit breaker, volume is little, over the ground, the fracture creepage distance significantly reduces, and reduced the floor space and the space of indoor electric substation, reduced cost of investment.
The technical scheme that the present invention is adopted for achieving the above object is: 72.5kV indoor type high-voltage SF
6Circuit breaker, be assembled on the framework by three arc extinguishing units, every phase arc extinguishing unit is a single break, electric control system and spring operating mechanism are installed in the control cabinet, the three-phase arc extinguishing unit is upper wiring board and is connected with static finger contact seat in the arc control device, have static contact finger and quiet arc contact on the static finger contact seat, static contact finger and fingertip separating brake or combined floodgate, moving contact connects cylinder, fingertip in the middle of cylinder connects, middle fingertip is connected with following terminal block, quiet arc contact and moving arcing contact divide or close, and moving arcing contact connects piston rod, the insulating bar in the piston rod connecting struts insulator, the insulating bar lower end is connected with spring operating mechanism, and arc control device are communicated with the strut porcelain bushing inner chamber and are filled with SF
6Gas.
Described static finger contact seat is fixedly mounted on the ring flange by screw thread.
Described interrupting porcelain insulator is by flange connecting struts insulator.
The present invention adopts SF
6Gas has superior break performance, safe and reliable to operation, simple in structure, flexible to operation as dielectric.Under the preceding topic that guarantees its mechanical performance and electric property, arc extinguishing unit has been carried out optimal design: structure and size to the static contact finger of original outdoor type circuit breaker, conducting rod, insulated tension pole are simplified and are reduced, thereby reduced the insulator height, made product realize miniaturization.With outdoor SF
6Circuit breaker relatively, the alternate centre-to-centre spacing of framework is 1000mm, the arc extinguishing unit height has only 1840mm, anti-filthy grade press the design of II level, creepage distance over the ground: 1450mm, fracture: 1670mm.Small product size is little, landed property area and the space is little, cost is low, cost is low, thereby can make electric substation reduce floor space, reduces the room height, saves construction investment.
Four, description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an arc extinguishing unit structural representation of the present invention.
Five, embodiment:
72.5kV indoor type high-voltage SF as shown in Figure 1
6Circuit breaker, be assembled on the framework 2 by three arc extinguishing units 1, base of frame has support 5, every phase arc extinguishing unit is a single break, electric control system and spring operating mechanism 4 are installed in the control cabinet 3, three-phase arc extinguishing unit 1 all as shown in Figure 2, upper wiring board 6 is connected with static finger contact seat in the arc control device 7, static finger contact seat is fixedly mounted on the ring flange 21 by screw thread, has static contact finger 8 and quiet arc contact 10 on the static finger contact seat, static contact finger 8 and moving contact 9 separating brakes or combined floodgate, moving contact 9 connects cylinder 13, fingertip 14 in the middle of cylinder connects, middle fingertip is connected with following terminal block 17, quiet arc contact 10 and moving arcing contact 12 separating brakes or combined floodgate, moving arcing contact connects piston rod 16, insulating bar 19 in the piston rod connecting struts insulator 18, the insulating bar lower end is connected with spring operating mechanism 4, and arc control device are communicated with the strut porcelain bushing inner chamber and are filled with SF
6 Gas 15, arc control device 7 insulators are by flange connecting struts insulator 18, and seal receptacle 20 is equipped with in the strut porcelain bushing bottom.
Circuit breaker when "on" position, electric current by upper wiring board 6 by static contact finger 8, movable contact refer to 9, cylinder 13 and middle fingertip 14 flow to down terminal block 17.
The separating brake actuating: insulating bar 19 under the actuating of spring operating mechanism 4, make movable contact refer to 9 and the cylinder 13 that is attached thereto move downward fast together.SF between cylinder 13 and the piston rod 16
6Gas is compressed, and static contact finger 9 separates, and electric current is transferred on moving arcing contact 12 and the quiet arc contact 10, and along with moving contact 9 continues to move downward, dynamic and static arcing contact separates, and produces electric arc, when electric arc leaves the quiet arc contact fast at spout 11 venturis, and compressed SF
6 Gas 15 is in critical pressure and sprays from venturi with velocity of sound, produces strong winding-up effect, and current over-zero moment is extinguished electric arc rapidly.Because moving contact continues to move downward, and the winding-up effect continues to carry out, going after having guaranteed to cut-off dissociated, and medium recovery strength is strengthened rapidly, finishes sub-switching operation behind the arc extinction.
Closing operation: during closing operation, upwards operation of insulating bar 19, moving contact and cylinder and movable member also move upward, SF
6Gas enters rapidly in the cylinder, and dynamic and static contact engages, and closing operation is finished.
Claims (3)
1,72.5kV indoor type high-voltage SF
6Circuit breaker, be assembled on the framework by three arc extinguishing units, every phase arc extinguishing unit is a single break, electric control system and spring operating mechanism are installed in the control cabinet, it is characterized in that: three-phase arc extinguishing unit (1) is upper wiring board (6) and is connected with the interior static finger contact seat of arc control device (7), have static contact finger (8) and quiet arc contact (10) on the static finger contact seat, static contact finger and moving contact (9) separating brake or combined floodgate, moving contact connects cylinder (13), fingertip (14) in the middle of cylinder connects, middle fingertip is connected with following terminal block (17), quiet arc contact (10) and moving arcing contact (12) separating brake or combined floodgate, moving arcing contact connects piston rod (16), the insulating bar (19) in the piston rod connecting struts insulator (18), the insulating bar bottom is connected with spring operating mechanism (4), and arc control device are communicated with the strut porcelain bushing inner chamber and are filled with SF
6Gas (15).
2,72.5kV indoor type high-voltage SF according to claim 1
6Circuit breaker is characterized in that: static finger contact seat is fixedly mounted on the ring flange (21) by screw thread.
3,72.5kV indoor type high-voltage SF according to claim 1
6Circuit breaker is characterized in that: arc control device (7) insulator is by flange connecting struts insulator (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102286402A CN101393814A (en) | 2008-11-06 | 2008-11-06 | 72.5kV indoor type high-voltage SF6 circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102286402A CN101393814A (en) | 2008-11-06 | 2008-11-06 | 72.5kV indoor type high-voltage SF6 circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101393814A true CN101393814A (en) | 2009-03-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102286402A Pending CN101393814A (en) | 2008-11-06 | 2008-11-06 | 72.5kV indoor type high-voltage SF6 circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101393814A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194618A (en) * | 2010-03-12 | 2011-09-21 | 华东电力试验研究院有限公司 | Bypass switch |
| CN102820169A (en) * | 2012-08-06 | 2012-12-12 | 江苏省如高高压电器有限公司 | Low temperature circuit breaker body |
| CN103107043A (en) * | 2011-11-11 | 2013-05-15 | 厦门华电开关有限公司 | High pressure outdoor isolating switch |
| CN110660595A (en) * | 2019-09-06 | 2020-01-07 | 平高集团有限公司 | High-voltage switch through-flow structure and moving contact thereof |
| CN113690093A (en) * | 2021-08-25 | 2021-11-23 | 西安西电开关电气有限公司 | Circuit breaker |
-
2008
- 2008-11-06 CN CNA2008102286402A patent/CN101393814A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194618A (en) * | 2010-03-12 | 2011-09-21 | 华东电力试验研究院有限公司 | Bypass switch |
| CN102194618B (en) * | 2010-03-12 | 2016-05-25 | 华东电力试验研究院有限公司 | A kind of by-pass switch |
| CN103107043A (en) * | 2011-11-11 | 2013-05-15 | 厦门华电开关有限公司 | High pressure outdoor isolating switch |
| CN103107043B (en) * | 2011-11-11 | 2016-10-26 | 厦门华电开关有限公司 | High voltage out-door disconnector |
| CN102820169A (en) * | 2012-08-06 | 2012-12-12 | 江苏省如高高压电器有限公司 | Low temperature circuit breaker body |
| CN110660595A (en) * | 2019-09-06 | 2020-01-07 | 平高集团有限公司 | High-voltage switch through-flow structure and moving contact thereof |
| CN110660595B (en) * | 2019-09-06 | 2022-07-05 | 平高集团有限公司 | High-voltage switch through-flow structure and moving contact thereof |
| CN113690093A (en) * | 2021-08-25 | 2021-11-23 | 西安西电开关电气有限公司 | Circuit breaker |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090325 |