CN110942945A - Load switch provided with high-standard grounding closing capacity isolator - Google Patents
Load switch provided with high-standard grounding closing capacity isolator Download PDFInfo
- Publication number
- CN110942945A CN110942945A CN201911074634.0A CN201911074634A CN110942945A CN 110942945 A CN110942945 A CN 110942945A CN 201911074634 A CN201911074634 A CN 201911074634A CN 110942945 A CN110942945 A CN 110942945A
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- CN
- China
- Prior art keywords
- isolator
- knife mechanism
- movable contact
- load switch
- fixed contact
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- 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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- 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
- H01H33/02—Details
-
- 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
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
-
- 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
- H01H33/02—Details
- H01H33/42—Driving mechanisms
-
- 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
- H01H9/52—Cooling of switch parts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a load switch configured with a high-standard alignment grounding on-off capacity isolator, which comprises a cabinet body, wherein a plurality of groups of circuit breakers and isolating switches which are matched with each other are arranged in the cabinet body, each circuit breaker comprises a first fixed contact arranged at the lower end, and each isolating switch comprises a movable contact knife mechanism; one end of the movable contact knife mechanism is a rotating end, the other end of the movable contact knife mechanism is provided with a second fixed contact matched with the first fixed contact, and the first fixed contact and the second fixed contact are contacted or separated with each other through the rotation of the movable contact knife mechanism. The invention realizes the requirement of high standard of the circuit device.
Description
Technical Field
The invention belongs to the field of electrical elements, and particularly relates to a load switch provided with a high-standard alignment grounding closing capacity isolator.
Background
The circuit breaker cabinet mainly comprises high-pressure vacuum circuit breaker and three-station isolation earthing switch, and high-pressure vacuum circuit breaker mainly relies on vacuum interrupter to accomplish the arc extinguishing function, and three-station isolation earthing switch mainly accomplish and keep apart and the ground connection function, and when the fault current appeared, vacuum circuit breaker carried out the separating brake, played the guard action. The standards of the circuit breakers used in the prior art have yet to be improved.
Disclosure of Invention
In view of the above problems, the present invention provides a load switch configured with a high-standard-alignment ground-closing-capability isolator.
The technical purpose is achieved, the technical effect is achieved, and the invention is realized through the following technical scheme:
a load switch configured with a high-standard aligning grounding closing capacity isolator comprises a cabinet body, wherein a plurality of groups of circuit breakers and isolating switches which are matched with each other are arranged in the cabinet body, each circuit breaker comprises a first fixed contact arranged at the lower end, and each isolating switch comprises a movable contact knife mechanism; one end of the movable contact knife mechanism is a rotating end, the other end of the movable contact knife mechanism is provided with a second fixed contact matched with the first fixed contact, and the first fixed contact and the second fixed contact are contacted or separated with each other through the rotation of the movable contact knife mechanism.
As a further improvement of the invention, the movable contact knife mechanism comprises two oppositely arranged connecting rods, one end of each connecting rod is connected with the cabinet body through a connecting piece and rotates by taking the connecting piece as a rotating shaft, and the second fixed contact is attached to the inner side of the other end of each connecting rod.
As a further improvement of the invention, the connecting rod connecting structure further comprises heat dissipation devices arranged at two ends of the connecting rod, and the heat dissipation devices comprise a plurality of first heat dissipation fins arranged at equal intervals on the non-connecting end of the connecting rod and second heat dissipation fins arranged at equal intervals on the outer side of the connecting piece.
As a further improvement of the present invention, the first heat sink and the second stationary contact are connected together by sintering.
As a further improvement of the invention, a shielding cover wrapping part of the outer surface of the first radiating fin is arranged on the outer side of the first radiating fin.
As a further improvement of the invention, the movable contact knife device further comprises a transmission mechanism, wherein the transmission mechanism comprises a transmission connecting piece, a transmission arm and a transmission main shaft, the transmission connecting piece is fixedly connected with the movable contact knife mechanism, the transmission main shaft is arranged in the cabinet body, one end of the transmission arm is connected with the transmission connecting piece, and the other end of the transmission arm is connected with the transmission main shaft.
As a further improvement of the invention, the transmission main shaft penetrates through the cabinet body.
As a further improvement of the present invention, the present invention further includes a first arc-extinguishing grid device matched with the isolating switch, the first arc-extinguishing grid device is disposed at a grounding position, a grounded third stationary contact is disposed on a bottom surface of the first arc-extinguishing grid device, and when the movable knife mechanism rotates to a horizontal position, the first arc-extinguishing grid device and the first heat sink are mutually engaged.
As a further improvement of the present invention, the circuit breaker is disposed in a sealed space surrounded by a circuit breaker housing disposed inside the cabinet, and a second arc chute device is disposed outside the circuit breaker housing.
The invention has the beneficial effects that: the load switch device designed by the invention can be switched on and off for 200 times under the condition of quota active load, and the quota cable is charged with the switching-on and switching-off current 40A; a transfer current of 2000A; the isolator device can bear the lightning impulse voltage of 1.2/50 us; the peak voltage of 95KV between phases and to the ground, the peak voltage of 110KV at the isolated fracture and the grounding short-circuit current closed for 5 times are achieved, and the requirement of high standard of the circuit device is met.
Drawings
FIG. 1 is a schematic front view of an insulated cabinet according to the present invention;
FIG. 2 is a schematic side view of the insulated cabinet according to the present invention;
FIG. 3 is a schematic structural diagram of the moving knife mechanism in the present invention;
fig. 4 is a schematic structural diagram of the circuit breaker and the disconnecting switch in the corresponding isolation closing state (a), isolation opening state (b) and grounding state (c);
wherein: 1-cabinet body, 2-second fixed contact, 3-shielding cover, 4-first fixed contact, 5-movable knife mechanism, 6-transmission main shaft, 7-first arc-extinguishing grid device, 8-connecting rod, 9-third fixed contact, 10-first radiating fin, 11-second radiating fin, 12-connecting piece, 13-transmission connecting piece, 14-transmission arm, 15-breaker shell and 16-second arc-extinguishing grid device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in the figure, the load switch provided with the isolator with high standard alignment grounding switching-on and switching-off capacity comprises a cabinet body 1, wherein a plurality of groups of circuit breakers and isolating switches which are matched with each other are arranged in the cabinet body 1, each circuit breaker comprises a first fixed contact 4 arranged at the lower end, and each isolating switch comprises a movable contact knife mechanism 5; one end of the movable contact knife mechanism 5 is a rotating end, the other end of the movable contact knife mechanism is provided with a second fixed contact 2 matched with the first fixed contact 4, and the first fixed contact 4 and the second fixed contact 2 are contacted or separated with each other through rotation of the movable contact knife mechanism 5, so that an isolation switching-on state and an isolation switching-off state are realized.
The movable contact knife mechanism 5 comprises two opposite connecting rods 8, one end of each connecting rod 8 is connected to a mounting seat arranged on the cabinet body and used for mounting the movable contact knife mechanism 5 through a connecting piece 12, the connecting pieces 12 are used as rotating shafts to rotate, and the second fixed contact 2 is attached to the inner side of the other end of each connecting rod 8. In an embodiment of the present invention, the second stationary contact 2 is made of tungsten copper, and the connecting member 12 may be connected by using a pin or a bolt.
In order to improve the voltage resistance of the isolating switch, the movable contact knife mechanism 5 is improved as follows: the gap distance between the second fixed contacts 2 on the two sides is smaller than the size of the first fixed contact 4.
The heat dissipation device comprises a plurality of first cooling fins 10 and second cooling fins 11, wherein the first cooling fins 10 are arranged at the two ends of the connecting rod 8 at equal intervals, and the second cooling fins 11 are arranged at the outer side of the connecting piece 12 at equal intervals. The radiating fin is made of aluminum foil. The first heat sink 10 and the second stationary contact 2 are connected together by sintering, and are tightly combined with each other and are not easy to fall off.
A shield 3 is further provided on the outside of the first heat sink 10 to wrap a portion of the outer surface thereof for equalizing the electric field of the contact springs 14 in the isolator.
In order to drive the movable knife mechanism 5 to rotate, the movable knife mechanism further comprises a transmission mechanism for providing rotating power, the transmission mechanism comprises a transmission connecting piece 13, a transmission arm 14 and a transmission main shaft 6, the transmission connecting piece 13 is fixedly connected with the movable knife mechanism 5, the transmission main shaft 6 is arranged in the cabinet body 1, one end of the transmission arm 14 is connected with the transmission connecting piece 13, and the other end of the transmission arm is connected with the transmission main shaft 6. The transmission connecting piece 13 is of a triangular structure and comprises two fixed point positions connected with the connecting rod 8 and a rotating point position connected with the transmission arm 14.
In the invention, the transmission main shaft 6 penetrates through the cabinet body 1, and the transmission arms 14 in all the isolating switches in the cabinet body 1 are connected with the transmission main shaft 6.
In order to improve the overall strength of the device, the device further comprises a first arc-extinguishing grid device 7 matched with the isolating switch, wherein the first arc-extinguishing grid device 7 is arranged at a grounding position, and a grounded third static contact 9 is arranged on the bottom surface of the first arc-extinguishing grid device. The first arc chute device 7 can realize two states of isolated switching-on and isolated switching-off, and can also realize a grounding state. When the moving contact knife mechanism 5 rotates to the horizontal position, the arc extinguishing function is completed through the mutual clamping of the first arc extinguishing grid device 7 and the first radiating fin 10 at the front end of the moving contact knife mechanism 5.
According to the invention, the minimum electric appliance gaps between phases and to the ground in SF6 gas are larger than or equal to 60mm, the minimum creepage distance is larger than or equal to 120mm, the fracture of the isolating switch is controlled to be about 65mm, the fracture of the grounding switch is controlled to be about 60mm, the closing speed of the load switch is 6m/s, the opening speed of the load switch is 5.5m/s, and the closing speed of the grounding switch is about 6.5 m/s.
The structure of the circuit breaker additionally installed in the cabinet body 1 is as follows: the main structure of the circuit breaker is arranged in a sealed space surrounded by a circuit breaker shell 15 arranged inside the cabinet body 1, and a second arc-extinguishing grid device 16 is arranged outside the circuit breaker shell 15.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A load switch of configuration high standard alignment ground closes ability isolator, includes cabinet body (1), its characterized in that: a plurality of groups of circuit breakers and isolating switches which are matched with each other are arranged in the cabinet body (1), each circuit breaker comprises a first fixed contact (4) arranged at the lower end, and each isolating switch comprises a movable contact knife mechanism (5); one end of the movable contact knife mechanism (5) is a rotating end, the other end of the movable contact knife mechanism is provided with a second fixed contact (2) matched with the first fixed contact (4), and the first fixed contact (4) and the second fixed contact (2) are contacted or separated with each other through the rotation of the movable contact knife mechanism (5).
2. The load switch configured with the high-standard alignment ground closing capability isolator as claimed in claim 1, wherein: the movable contact knife mechanism (5) comprises two opposite connecting rods (8), one end of each connecting rod (8) is connected with the cabinet body (1) through a connecting piece and rotates by taking the connecting piece (12) as a rotating shaft, and the second fixed contact (2) is attached to the inner side of the other end of each connecting rod (8).
3. The load switch configured with the high-standard-alignment ground-closing-capability isolator as claimed in claim 2, wherein: the heat dissipation device is characterized by further comprising heat dissipation devices arranged at two ends of the connecting rod (8), and the heat dissipation devices comprise a plurality of first cooling fins (10) arranged at equal intervals on the non-connecting end of the connecting rod (8), and second cooling fins (11) arranged at equal intervals on the outer side of the connecting piece (12).
4. A load switch configured with a high standard alignment ground closing capability isolator as claimed in claim 3, wherein: the first radiating fin (10) and the second fixed contact (2) are connected together through sintering.
5. A load switch configured with a high standard alignment ground closing capability isolator as claimed in claim 3, wherein: and a shielding cover (3) wrapping part of the outer surface of the first radiating fin (10) is arranged on the outer side of the first radiating fin.
6. The load switch configured with the high-standard alignment ground closing capability isolator as claimed in claim 1, wherein: the movable contact knife mechanism is characterized by further comprising a transmission mechanism, the transmission mechanism comprises a transmission connecting piece (13), a transmission arm (14) and a transmission main shaft (6), the transmission connecting piece (13) is fixedly connected with the movable contact knife mechanism (5), the transmission main shaft (6) is arranged in the cabinet body (1), one end of the transmission arm (14) is connected with the transmission connecting piece (13), and the other end of the transmission arm is connected with the transmission main shaft (6).
7. The load switch configured with the high-standard-alignment ground-closing-capability isolator as claimed in claim 6, wherein: comprises a transmission main shaft (6) which penetrates through the cabinet body (1).
8. The load switch configured with the high-standard alignment ground closing capability isolator as claimed in claim 1, wherein: the movable contact knife mechanism is characterized by further comprising a first arc-extinguishing grid device (7) matched with the isolating switch, the first arc-extinguishing grid device (7) is arranged at a grounding position, a grounded third fixed contact (9) is arranged on the bottom surface of the first arc-extinguishing grid device, and when the movable contact knife mechanism (5) rotates to a horizontal position, the first arc-extinguishing grid device (7) and the first radiating fins (10) are mutually clamped.
9. The load switch configured with the high-standard alignment ground closing capability isolator as claimed in claim 1, wherein: the circuit breaker is arranged in a sealed space surrounded by a circuit breaker shell (15) arranged in the cabinet body (1), and a second arc-extinguishing grid device (16) is arranged on the outer side of the circuit breaker shell (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074634.0A CN110942945A (en) | 2019-11-06 | 2019-11-06 | Load switch provided with high-standard grounding closing capacity isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074634.0A CN110942945A (en) | 2019-11-06 | 2019-11-06 | Load switch provided with high-standard grounding closing capacity isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110942945A true CN110942945A (en) | 2020-03-31 |
Family
ID=69906302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911074634.0A Pending CN110942945A (en) | 2019-11-06 | 2019-11-06 | Load switch provided with high-standard grounding closing capacity isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110942945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900003A (en) * | 2020-08-19 | 2020-11-06 | 北京华电瑞通电力工程技术有限公司 | Tripping interlocking device and high-voltage combined electrical appliance cabinet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138630Y (en) * | 2007-12-10 | 2008-10-22 | 河南森源电气股份有限公司 | Contact knife of indoor high-voltage isolating switch |
| CN205723309U (en) * | 2016-06-06 | 2016-11-23 | 温州罗克维电气有限公司 | Gas-filling cabinet on-load switch |
| CN206040507U (en) * | 2016-08-30 | 2017-03-22 | 上海启腾电气股份有限公司 | Aerify load switch for cabinet |
| CN207367873U (en) * | 2017-07-07 | 2018-05-15 | 河北电力装备有限公司 | A kind of piston gas-pressing formula on-load switch |
| CN108335926A (en) * | 2018-02-08 | 2018-07-27 | 广东金晖隆开关有限公司 | A kind of shielding construction of environment-protecting cabinet contact |
| CN208271796U (en) * | 2018-04-17 | 2018-12-21 | 西门子股份公司 | The driving assembly and its disconnecting switch and switchgear of disconnecting switch |
| CN109698089A (en) * | 2019-01-28 | 2019-04-30 | 广东安恒铁塔钢构有限公司 | A kind of tri-station isolating switch and atmospheric closed permanent-magnet breaker cabinet |
| CN209496777U (en) * | 2019-01-28 | 2019-10-15 | 深圳市蓝希望电子有限公司 | Switch movable contact knife system with arc blow-out function |
-
2019
- 2019-11-06 CN CN201911074634.0A patent/CN110942945A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138630Y (en) * | 2007-12-10 | 2008-10-22 | 河南森源电气股份有限公司 | Contact knife of indoor high-voltage isolating switch |
| CN205723309U (en) * | 2016-06-06 | 2016-11-23 | 温州罗克维电气有限公司 | Gas-filling cabinet on-load switch |
| CN206040507U (en) * | 2016-08-30 | 2017-03-22 | 上海启腾电气股份有限公司 | Aerify load switch for cabinet |
| CN207367873U (en) * | 2017-07-07 | 2018-05-15 | 河北电力装备有限公司 | A kind of piston gas-pressing formula on-load switch |
| CN108335926A (en) * | 2018-02-08 | 2018-07-27 | 广东金晖隆开关有限公司 | A kind of shielding construction of environment-protecting cabinet contact |
| CN208271796U (en) * | 2018-04-17 | 2018-12-21 | 西门子股份公司 | The driving assembly and its disconnecting switch and switchgear of disconnecting switch |
| CN109698089A (en) * | 2019-01-28 | 2019-04-30 | 广东安恒铁塔钢构有限公司 | A kind of tri-station isolating switch and atmospheric closed permanent-magnet breaker cabinet |
| CN209496777U (en) * | 2019-01-28 | 2019-10-15 | 深圳市蓝希望电子有限公司 | Switch movable contact knife system with arc blow-out function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900003A (en) * | 2020-08-19 | 2020-11-06 | 北京华电瑞通电力工程技术有限公司 | Tripping interlocking device and high-voltage combined electrical appliance cabinet |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200331 |