CN107731594B - Back-up protector of gapless surge protector - Google Patents
Back-up protector of gapless surge protector Download PDFInfo
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- CN107731594B CN107731594B CN201711207816.1A CN201711207816A CN107731594B CN 107731594 B CN107731594 B CN 107731594B CN 201711207816 A CN201711207816 A CN 201711207816A CN 107731594 B CN107731594 B CN 107731594B
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- contact
- arc
- sliding cap
- protector
- moving contact
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- 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
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/32—Insulating body insertable between contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a backup protector of a gapless surge protector, which comprises a shell, wherein an operating mechanism and a conductive system are arranged in the shell, and an arc isolating plate driven to slide by a sliding cap is arranged between a contact of a static contact and a contact of a moving contact; in a smaller space, the arc isolation and the arc breaking are fast under the premise of small opening distance of the moving contact and the static contact, and the anti-discharge creepage effect is good; because an arc isolating plate is designed between the moving contact and the static contact, the arc isolating plate is connected with the sliding cap. The arc-isolating plate moves forward when the control linkage rod slides, so that the moving points and the static points are contacted or disconnected; when the circuit breaker is disconnected, the arc isolating plate is rapidly inserted between the moving contact and the fixed contact under the action of the sliding cap, and the electric arc is completely isolated, so that the electric arc generated when a large current is disconnected has the minimum influence on the moving contact and the fixed contact, and the breaking capacity of the circuit breaker is greatly improved.
Description
Technical Field
The invention relates to the technical field of lightning surge protection equipment, in particular to a backup protector of a gapless surge protector.
Background
The backup protector is an electric device which is connected with the surge protector in series, when the series loop has a lightning electromagnetic pulse current impact process with three ranges of 8/20 mu s (1-40) kA, (40-80) kA and (80-100) kA, the backup protector can not generate the phenomena of breaking, malfunction breaking and the like, when the surge protector is subjected to lightning electromagnetic pulse current, Temporary Overvoltage (TOV) faults caused by low-voltage system faults, Transient Overvoltage (TOV) faults caused by high-voltage (middle-voltage) system faults or operation overvoltage and other impacts of the power supply and distribution system, the damage such as deterioration, breakdown, short circuit and the like is caused, when the power frequency current passing through the backup protector is larger than 0.8A, the backup protector is required to be quickly switched off, the surge protector is separated from a power distribution system, and serious accidents such as fire, bus tripping and the like caused by the fault of the surge protector are effectively avoided. Safety guarantee is provided for national defense, communication, industrial and agricultural production, families, office places and the like. At present, the space position between the contact of the movable contact and the contact of the fixed contact in the backup protector of the existing surge protector is small, electric arcs can be generated when the conducting current is overlarge, the backup protector not only has great damage effect on the contact of the movable (fixed) point, but also prolongs the action time of a breaking circuit, thereby affecting the performance of a product.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a backup protector of a gapless surge protector, which can ensure arc extinction and improve the arc extinction performance on the premise that the space position is insufficient, the conducting current is large, the sectional area of a movable contact and a stationary contact is large, the pressure required by the movable contact and the stationary contact is large, and the like, and simultaneously, the insulation grade direct current 2000V and the discharge grade 5000V alternating current voltage between the movable contact and the stationary contact after being divided are improved.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a no clearance surge protector's back-up protection ware, includes casing, first binding post, second binding post, circuit board module, electromagnetic switch, electromagnetism release and handle, circuit board module, electromagnetic switch and electromagnetism release set up in the casing to the electricity is connected between first binding post and the second binding post, its characterized in that: the shell is internally provided with an operating mechanism and a conductive system, the conductive system comprises a fixed contact, a movable contact, a wire and a supporting conductive plate, one end of the supporting conductive plate is connected with the input end of the electromagnetic switch, the middle part of the movable contact is arranged at the other end of the supporting conductive plate, a contact of the movable contact is electrically connected with the supporting conductive plate through the wire, and the fixed contact is electrically connected with the first wiring terminal arranged on the shell; the operating mechanism comprises an operating linkage rod and a sliding cap, one end of the operating linkage rod is in transmission connection with the handle, the other end of the operating linkage rod is provided with the sliding cap, a pressure spring for applying pressure to the sliding cap is arranged on the operating linkage rod, one end, far away from the pressure spring, of the sliding cap abuts against the moving contact, and an arc isolating plate driven by the sliding cap to slide is arranged between the contact of the fixed contact and the contact of the moving contact.
In a preferred embodiment, the housing is provided with a sliding groove for accommodating sliding of the arc baffle, and the arc baffle is slidably arranged in the sliding groove.
As a preferred embodiment, a connecting hole is formed in one end of the arc isolating plate, which is connected with the sliding cap, and the connecting hole is sleeved on the sliding cap.
As a preferred embodiment, the movable contact is arranged in a V shape, and the sliding cap slides on the movable contact to control the movable contact to be connected with or disconnected from the fixed contact.
In a preferred embodiment, one end of the sliding cap close to the pressure spring is provided with a guide shaft for limiting.
In a preferred embodiment, the arc isolating plate is made of an insulating material.
The beneficial effects obtained by adopting the technical scheme are as follows: in a smaller space, the arc isolation and the arc breaking are fast under the premise of small opening distance of the moving contact and the static contact, and the anti-discharge creepage effect is good; because an arc isolating plate is designed between the moving contact and the static contact, the arc isolating plate is connected with the sliding cap. The arc-isolating plate moves forward when the control linkage rod slides, so that the moving points and the static points are contacted or disconnected; when the circuit breaker is disconnected, the arc isolating plate is rapidly inserted between the moving contact and the fixed contact under the action of the sliding cap, and the electric arc is completely isolated, so that the electric arc generated when a large current is disconnected has the minimum influence on the moving contact and the fixed contact, and the breaking capacity of the circuit breaker is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the flash barrier of the present invention.
In the figure: the circuit board comprises a shell 1, a first connecting terminal 2, a second connecting terminal 3, a circuit board module 4, an electromagnetic switch 5, an electromagnetic release 6, a handle 7, a static contact 8, a movable contact 9, a conducting wire 10, a supporting conducting plate 11, an operating linkage rod 12, a sliding cap 13, a pressure spring 14, an arc isolating plate 15, a sliding chute 16, a connecting hole 17, a guide shaft 18 and a contact 19.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention is further described with reference to the accompanying drawings, so that those skilled in the art can better implement the invention, and the backup protector of the gapless surge protector in the embodiment of the invention comprises a housing 1, a first connection terminal 2, a second connection terminal 3, a circuit board module 4, an electromagnetic switch 5, an electromagnetic release 6 and a handle 7, wherein the circuit board module 4, the electromagnetic switch 5 and the electromagnetic release 6 are arranged in the housing 1 and are electrically connected between the first connection terminal 2 and the second connection terminal 3, and the backup protector is characterized in that: the shell 1 is also internally provided with an operating mechanism and a conductive system, the conductive system comprises a static contact 8, a moving contact 9, a wire 10 and a supporting conductive plate 11, one end of the supporting conductive plate 11 is connected with the input end of the electromagnetic switch 5, the middle part of the moving contact 9 is arranged at the other end of the supporting conductive plate 11, a contact 19 of the moving contact 9 is electrically connected with the supporting conductive plate 11 through the wire 10, and the static contact 8 is electrically connected with a first wiring terminal 2 arranged on the shell 1; the operating mechanism comprises an operating linkage rod 12 and a sliding cap 13, one end of the operating linkage rod 12 is in transmission connection with the handle 7, the other end of the operating linkage rod 12 is provided with the sliding cap 13, the operating linkage rod 12 is provided with a pressure spring 14 for applying pressure to the sliding cap 13, one end of the sliding cap 13, which is far away from the pressure spring 14, is abutted against the movable contact 9, and an arc isolating plate 15 driven by the sliding cap 13 to slide is arranged between a contact 19 of the fixed contact 8 and a contact 19 of the movable contact 9.
In the embodiment of the present invention, in order to limit the motion path of the arc-isolating plate 15, a sliding groove 16 for accommodating the sliding of the arc-isolating plate 15 is provided on the housing 1, and the arc-isolating plate 15 is slidably disposed in the sliding groove 16. In order to connect the arc isolating plate 15 to the sliding cap 13, a connecting hole 17 is formed in one end, connected with the sliding cap 13, of the arc isolating plate 15, and the connecting hole 17 is sleeved on the sliding cap 13; in order to prevent the flash barrier 15 from falling off the sliding cap 13, a guide shaft 18 for limiting the position is provided at one end of the sliding cap 13 close to the pressure spring 14. The moving contact 9 is arranged in a V shape, and a sliding cap 13 slides on the moving contact to control the moving contact to be combined with or disconnected from the fixed contact 8.
The embodiment of the invention realizes the stable operation of the flexible mechanism, and the handle 7 drives the sliding cap 13 of the operating mechanism to slide so that the movable contact 9 leaves the central supporting point under the vertical pressure of the movable contact. When moving leftwards, the moving contact 9 is combined and conducted with the static contact 8 under the pressure from the operating rod to the sliding cap 13, and at the moment, the sliding force of the sliding cap 13 is that the transverse acting force does not move greatly with the transverse thrust of the handle 7 under the pressure in the vertical direction, so that a larger vertical pressure can be obtained by applying a smaller acting force, and the friction force is smaller, thereby achieving the purpose of convenient and flexible operation. However, the vertical downward pressure on the sliding cap 13 is different, and is determined by the magnitude of the pressure spring 14, which acts on the movable contact 9 vertically, so that the movable contact 9 and the contact 19 of the static contact 8 are combined more tightly, and the central support point of the movable contact 9 adopts a movable linear contact fulcrum, so that the movable contact 9 and the contact 19 of the static contact 8 are combined more perfectly on the transverse surface. When the action of leakage current occurs, the control linkage rod 12 can rapidly slide rightwards, the sliding cap 13 is under a downward acting force, the moving contact 9 of the control linkage rod 12 is rapidly disconnected under the action of the acting force and the inertia force of the tension spring, and the opening distance can reach more than 4.5mm, so that the flexible operation is realized. High reliability and the like.
The embodiment of the invention realizes the principle of high-current straight conduction as much as possible, and the conduction current is very large (10-100) KA, so that the time is 10-50 microseconds. Therefore, on the premise of ensuring enough conductive sectional area, the principle that the included angle is not good or the larger the included angle is, the better the included angle is. So as to avoid forming huge eddy magnetic field, and seriously affect and damage the electrical performance and the mechanical performance of the product mechanism. The embodiment of the invention adopts a linear conductive mode. Therefore, the influence of large magnetic field force due to impact of large current on the mechanism is greatly relieved. Therefore, the large conduction current and the small electromagnetic influence are realized. Stable mechanism and the like. The key point is that the pivot of the movable contact 9 is designed on the conductive plate to be supported and tightly pressed against the conductive plate, thereby realizing shunting to reduce conduction current through the wire 10.
The embodiment of the invention has simple and stable structure, when the thunder large-current electromagnetic pulse generates magnetic field acting force and conductor expansion force (namely magnetic vibration) on a conductive part, only acting force in the axial direction is applied to an operating connecting rod connected with an operating mechanism, and unstable factors of the operating mechanism, particularly phenomena of malfunction, shedding and the like are greatly relieved through the damping action of the sliding cap 13 and the pressure spring 14.
The arc isolation plate 15 of the embodiment of the invention has the advantages of fast arc isolation and arc breaking and good anti-discharge creepage effect on the premise of small design space and small contact opening distance of the movable contact 19 and the fixed contact 19; because the arc isolating plate 15 made of insulating materials such as mica or asbestos is designed between the moving contact 8 and the fixed contact 8, and the small gap sleeved structure is arranged between the arc isolating plate 15 and the sliding cap 13, when the operation linkage rod 12 slides leftwards, the arc isolating plate 15 moves along with the operation linkage rod, and the contact between the contact 19 of the moving contact 9 and the contact 19 of the fixed contact 8 is good. When the operating linkage rod 12 slides rightwards, namely is disconnected, the arc isolating plate 15 acts together under the action of the sliding cap 13 and moves rightwards rapidly to be inserted between the contact 19 of the moving contact 9 and the contact 19 of the static contact 8, so that the arc is completely isolated, the effect of the arc generated when the large current is disconnected on the contact 19 of the moving contact 9 and the contact 19 of the static contact 8 is minimized, and the breaking capacity of the product is greatly improved. The breaking of more than 3000A, after the contact 19 of the moving contact 9 and the contact 19 of the static contact 8 are completely separated, the effects of insulation, arc discharge prevention and creepage prevention are achieved at the time of high voltage of 2 nd time, and the effects of discharge and creepage after the lightning arrester and the like are damaged due to line faults and surges are greatly relieved and improved.
The upper, lower, left and right in the present invention correspond to the upper, lower, left and right in the drawings of the present invention, and this description makes it easy to express that the innovative points in the present invention are the manipulating mechanism and the conductive system, and the remaining features are the same as those of application No. 201710597341.5.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. The utility model provides a no clearance surge protector's back-up protection ware, includes casing, first binding post, second binding post, circuit board module, electromagnetic switch, electromagnetism release and handle, circuit board module, electromagnetic switch and electromagnetism release set up in the casing to the electricity is connected between first binding post and the second binding post, its characterized in that: the shell is internally provided with an operating mechanism and a conductive system, the conductive system comprises a fixed contact, a movable contact, a wire and a supporting conductive plate, one end of the supporting conductive plate is connected with the input end of the electromagnetic switch, the middle part of the movable contact is arranged at the other end of the supporting conductive plate, a contact of the movable contact is electrically connected with the supporting conductive plate through the wire, and the fixed contact is electrically connected with the first wiring terminal arranged on the shell; the operating mechanism comprises an operating linkage rod and a sliding cap, one end of the operating linkage rod is in transmission connection with the handle, the other end of the operating linkage rod is provided with the sliding cap, the operating linkage rod is provided with a pressure spring for applying pressure to the sliding cap, one end of the sliding cap, which is far away from the pressure spring, is abutted against the moving contact, and an arc-isolating plate driven by the sliding cap to slide is arranged between the contact of the fixed contact and the contact of the moving contact; the central supporting point of the moving contact adopts a movable linear contact fulcrum.
2. A back-up protector for a gapless surge protector according to claim 1, wherein: the shell is provided with a sliding chute for accommodating the flash barrier, and the flash barrier is arranged in the sliding chute in a sliding manner.
3. A back-up protector for a gapless surge protector according to claim 1, wherein: the one end that the flash barrier with the slip cap is connected is provided with the connecting hole, the connecting hole cover is established on the slip cap.
4. A back-up protector for a gapless surge protector according to claim 1, wherein: the moving contact is arranged in a V shape, and the sliding cap slides on the moving contact to control the moving contact to be combined with or disconnected from the fixed contact.
5. A back-up protector for a gapless surge protector according to claim 1, wherein: one end of the sliding cap, which is close to the pressure spring, is provided with a guide shaft for limiting.
6. A back-up protector for a gapless surge protector according to claim 1, wherein: the flash barrier is made of insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711207816.1A CN107731594B (en) | 2017-11-27 | 2017-11-27 | Back-up protector of gapless surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711207816.1A CN107731594B (en) | 2017-11-27 | 2017-11-27 | Back-up protector of gapless surge protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107731594A CN107731594A (en) | 2018-02-23 |
| CN107731594B true CN107731594B (en) | 2020-04-17 |
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ID=61218637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711207816.1A Active CN107731594B (en) | 2017-11-27 | 2017-11-27 | Back-up protector of gapless surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107731594B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2153592A (en) * | 1984-01-30 | 1985-08-21 | Chaplin Tanner Products Limite | Electrical switches |
| DE4234065C1 (en) * | 1992-10-09 | 1993-12-02 | Eti Elektroelement Dd | Switchgear |
| CN103531379A (en) * | 2013-10-23 | 2014-01-22 | 通能顺达科技国际有限公司 | Synchronous insulation separation power switch device |
| CN103594297A (en) * | 2012-08-14 | 2014-02-19 | 富士电机机器制御株式会社 | Circuit breaker |
| CN107248488A (en) * | 2017-07-20 | 2017-10-13 | 国隆电气有限公司 | Shove the back-up protection device of protector |
| CN107359068A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with compound arc extinction performance |
| CN107393777A (en) * | 2017-08-23 | 2017-11-24 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with high breaking performance |
| CN207489717U (en) * | 2017-11-27 | 2018-06-12 | 国隆电气有限公司 | A kind of back-up protection device of gapless surge protector |
-
2017
- 2017-11-27 CN CN201711207816.1A patent/CN107731594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2153592A (en) * | 1984-01-30 | 1985-08-21 | Chaplin Tanner Products Limite | Electrical switches |
| DE4234065C1 (en) * | 1992-10-09 | 1993-12-02 | Eti Elektroelement Dd | Switchgear |
| CN103594297A (en) * | 2012-08-14 | 2014-02-19 | 富士电机机器制御株式会社 | Circuit breaker |
| CN103531379A (en) * | 2013-10-23 | 2014-01-22 | 通能顺达科技国际有限公司 | Synchronous insulation separation power switch device |
| CN107248488A (en) * | 2017-07-20 | 2017-10-13 | 国隆电气有限公司 | Shove the back-up protection device of protector |
| CN107359068A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with compound arc extinction performance |
| CN107393777A (en) * | 2017-08-23 | 2017-11-24 | 河北宝凯电气股份有限公司 | A kind of breaker of plastic casing with high breaking performance |
| CN207489717U (en) * | 2017-11-27 | 2018-06-12 | 国隆电气有限公司 | A kind of back-up protection device of gapless surge protector |
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| Publication number | Publication date |
|---|---|
| CN107731594A (en) | 2018-02-23 |
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