CN214753590U - Circuit breaker system capable of reducing arcing distance - Google Patents
Circuit breaker system capable of reducing arcing distance Download PDFInfo
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- CN214753590U CN214753590U CN202121190765.8U CN202121190765U CN214753590U CN 214753590 U CN214753590 U CN 214753590U CN 202121190765 U CN202121190765 U CN 202121190765U CN 214753590 U CN214753590 U CN 214753590U
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Abstract
The utility model discloses a circuit breaker system for reducing arcing distance, which comprises a circuit breaker, an arcing shield and an insulating base; the upper surface of the insulating base is sunken towards the inside of the insulating base to form a mounting groove, and the circuit breaker and the arcing shield are fixedly connected and arranged in the mounting groove; the inner wall of one side of the circumferential direction of the mounting groove is provided with vertically extending strip-shaped bulges, and the flashover cover is provided with strip-shaped slots which are correspondingly matched and spliced with the strip-shaped bulges; three arc suppression grid groups are arranged in the flying arc cover in parallel at intervals, each arc suppression grid group corresponds to three phases of the circuit breaker, each arc suppression grid group comprises at least three arc suppression grid pieces which are arranged in parallel at intervals, and each arc suppression grid piece vertically extends along the direction parallel to the strip-shaped slot; a plurality of meshes which penetrate through the two opposite sides of the arc-extinguishing grating are uniformly arranged on the arc-extinguishing grating. The advantages are that: the arc-extinguishing cover plays a role in interphase insulation, short circuit with other circuit breakers caused by external spraying of electric arcs is prevented, the arc-extinguishing barrier can play a role in cooling and dividing the electric arcs, and the spraying of the electric arcs is reduced.
Description
Technical Field
The utility model relates to a circuit breaker technical field especially relates to a reduce circuit breaker system of flashover distance.
Background
Many large photovoltaic plants use string inverters. The photovoltaic module has the advantages that the photovoltaic module is not influenced by module difference and shading among the strings, and the situation that the optimal working point of the photovoltaic module is not matched with the inverter is reduced, so that the generating capacity is increased. These technical advantages not only reduce the cost of the system, but also increase the reliability of the system. The MPPT voltage range of the string inverter is wide, generally 250-800V, and the rated voltage of the common AC circuit breakers in the market is mostly AC400V and AC690V, so that the problem that the circuit breaker with the rated voltage of AC800V required by a photovoltaic system is produced at the same time is solved.
For the development of high-voltage (AC800V) alternating current circuit breaker products, the technical difficulty is short-circuit breaking capacity, and due to the fact that rated voltage is high, when short circuit occurs, arc voltage is smaller than external voltage, electric arcs are not easy to extinguish, and secondary short circuit caused by reignition of the electric arcs at the upper opening of a circuit breaker often occurs, so that fire accidents are caused. Therefore, how to avoid the secondary short circuit of the incoming line end when the breaker is in short circuit becomes a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reduce circuit breaker system of flashover distance to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a circuit breaker system for reducing arcing distance comprises a circuit breaker, an arcing shield and an insulating base; the upper surface of the insulating base is sunken towards the inside of the insulating base to form a mounting groove, the circuit breaker and the flashover cover are arranged in the mounting groove in parallel, and the flashover cover is fixedly connected with the circuit breaker; the inner wall of one circumferential side of the mounting groove is provided with vertically extending strip-shaped bulges, the outer wall of one circumferential side of the flying arc cover is provided with strip-shaped slots which are correspondingly matched and spliced with the strip-shaped bulges, and the strip-shaped bulges are correspondingly spliced with the strip-shaped slots respectively so as to fixedly connect the flying arc cover with the insulating base; three arc suppression grid groups are arranged in the flying arc shield in parallel at intervals, each arc suppression grid group corresponds to three phases of the circuit breaker, each arc suppression grid group comprises at least three arc suppression grid pieces which are arranged in parallel at intervals, and each arc suppression grid piece extends vertically in the direction parallel to the strip-shaped slot; and a plurality of meshes which penetrate through the two opposite sides of the arc-extinguishing grating are uniformly arranged on the arc-extinguishing grating.
Preferably, the opposite two sides of one end of each arc-extinguishing grid piece are respectively provided with a clamping protrusion which protrudes and extends outwards along a direction parallel to the arc-extinguishing grid pieces, the upper surface of the bottom of the flash hood is provided with a clamping groove, each clamping protrusion is correspondingly inserted into each clamping groove, the arc-extinguishing grid pieces are fixed in the flash hood, and the other end of each arc-extinguishing grid piece extends vertically upwards and correspondingly abuts against the lower surface of the top of the flash hood.
Preferably, the arc-extinguishing grating is parallel to the two opposite sides of the strip-shaped slot and is bent towards the direction far away from the circuit breaker, so that the cross section of the arc-extinguishing grating perpendicular to the strip-shaped slot is in a U shape.
Preferably, the cover plate corresponds the cover and is in the upper surface of circuit breaker, the cover plate with the top correspondence of circuit breaker is provided with first mounting hole and second mounting hole, and the fastener correspondence passes first mounting hole and second mounting hole will the cover plate with circuit breaker fixed connection.
Preferably, at least one strip-shaped top block which protrudes and extends inwards is arranged on the inner walls of two circumferentially opposite sides of the mounting groove respectively, and the extending end of each strip-shaped top block is correspondingly attached and contacted with the outer peripheral wall of the circuit breaker; the strip-shaped top block is parallel to the strip-shaped bulges.
The utility model has the advantages that: 1. the arc-extinguishing cover plays a role in interphase insulation, short circuit with other circuit breakers caused by external spraying of electric arcs is prevented, the arc-extinguishing barrier can play a role in cooling and dividing the electric arcs, and the spraying of the electric arcs is reduced. 2. The arc extinguishing barrier piece can support the arc flying cover and prevent the arc flying cover from breaking when bearing arc energy. 3. The circuit breaker and the arcing shield are arranged in the groove of the insulating base, short circuit among electric arcs and short circuit between the electric arcs and the bottom metal mounting plate are prevented, and short circuit of a wire inlet end caused by ejection of the electric arcs is finally avoided.
Drawings
Fig. 1 is a schematic structural diagram of a circuit breaker system according to an embodiment of the present invention;
fig. 2 is a partial cross-sectional view of a circuit breaker system in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an arc-extinguishing grid in an embodiment of the present invention.
In the figure: 1. a circuit breaker; 2. a first mounting hole; 3. a flying arc cover; 4. an arc-extinguishing barrier sheet; 5. an insulating base; 6. strip-shaped bulges; 7. strip-shaped slots; 8. a cover plate; 9. clamping convex; 10. mesh openings; 11. and a strip-shaped top block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
As shown in fig. 1 to 4, in the present embodiment, there is provided a circuit breaker system for reducing a flashover distance, including a circuit breaker 1, a flashover cover 3, and an insulating base 5; the upper surface of the insulating base 5 is sunken towards the inside to form a mounting groove, the circuit breaker 1 and the flying arc cover 3 are arranged in the mounting groove in parallel, and the flying arc cover 3 is fixedly connected with the circuit breaker 1; the inner wall of one circumferential side of the mounting groove is provided with vertically extending strip-shaped bulges 6, the outer wall of one circumferential side of the flying arc cover 3 is provided with strip-shaped slots 7 which are correspondingly matched and spliced with the strip-shaped bulges 6, and the strip-shaped bulges 6 are correspondingly spliced with the strip-shaped slots 7 respectively so as to fixedly connect the flying arc cover 3 with the insulating base 5; three arc suppression grid groups are arranged in the flying arc cover 3 in parallel at intervals, each arc suppression grid group corresponds to three phases of the circuit breaker 1, each arc suppression grid group comprises at least three arc suppression grid pieces 4 which are arranged in parallel at intervals, and each arc suppression grid piece 4 vertically extends along the direction parallel to the strip-shaped slot 7; and a plurality of meshes 10 penetrating through the two opposite sides of the arc-extinguishing grid sheet 4 are uniformly arranged on the arc-extinguishing grid sheet.
In this embodiment, referring to fig. 1 and 2, it can be seen that the insulating base 5 has a rectangular parallelepiped shape, the upper surface of the insulating base is recessed into the insulating base to form a rectangular parallelepiped mounting groove, and the flying arc cover 3 and the circuit breaker 1 are fixedly mounted in the mounting groove in parallel. The flying arc cover 3 is matched and spliced with the strip-shaped bulge 6 arranged in the mounting groove through the strip-shaped slot 7 arranged on the flying arc cover, so that the flying arc cover 3 is fixedly connected with the insulating base 5.
Fly arc cover 3 top and be close to one lateral direction of circuit breaker 1 is close to circuit breaker 1's direction protrusion extends and forms apron 8, apron 8 corresponds the cover and is in circuit breaker 1's upper surface, apron 8 with circuit breaker 1's top correspondence is provided with first mounting hole 2 and second mounting hole, and the fastener correspondence passes first mounting hole 2 and second mounting hole will fly arc cover 3 with circuit breaker 1 fixed connection. The apron 8 with the top integrated into one piece of flying arc cover 3, apron 8 can take the top of lid at circuit breaker 1 to use fastening screw to pass through the second mounting hole that sets up on the first mounting hole 2 that sets up on the apron 8 and the circuit breaker 1 with flying arc cover 3 and circuit breaker 1 fixed connection.
The circuit breaker 1 and the insulating base 5 are fixedly connected by fastening screws. The inner walls of two circumferentially opposite sides of the mounting groove are respectively provided with at least one strip-shaped top block 11 which protrudes and extends inwards, and the extending end of each strip-shaped top block 11 is correspondingly attached and contacted with the outer peripheral wall of the circuit breaker 1; the strip-shaped top block 11 is parallel to the strip-shaped bulges 6, so that the circuit breaker 1 is further fixed in the installation groove, and the explosion of the circuit breaker due to overlarge arc energy is avoided.
In this embodiment, the opposite two sides of one end of the arc extinguishing grid piece 4 are respectively provided with a clamping protrusion 9 which protrudes and extends outwards along the direction parallel to the arc extinguishing grid piece 4, the upper surface of the bottom of the flying arc cover 3 is provided with a clamping groove, each clamping protrusion 9 is correspondingly inserted into each clamping groove, the arc extinguishing grid piece 4 is fixed in the flying arc cover 3, and the other end of the arc extinguishing grid piece 4 vertically extends upwards and correspondingly abuts against the lower surface of the top of the flying arc cover 3.
In this embodiment, the two opposite sides of the arc-extinguishing grid piece 4 parallel to the strip-shaped slot 7 are bent in a direction away from the circuit breaker 1, so that the cross section of the arc-extinguishing grid piece 4 perpendicular to the strip-shaped slot 7 is U-shaped.
The arc extinguishing grating piece is assembled in the flying arc cover 3, and because the flying arc cover 3 is made of thermoplastic material, the arc extinguishing grating piece deforms in the insertion process, after the arc extinguishing grating piece is assembled in place, the arc extinguishing grating piece is clamped in the clamping groove of the flying arc cover 3 and cannot be reversely pulled out due to the clamping protrusion 9 at one end of the arc extinguishing grating piece, and the arc extinguishing grating piece is guaranteed not to easily fall off after the assembly is completed. Three groups of arc-extinguishing grating groups are respectively arranged in the flying arc cover 3 corresponding to three phases of the circuit breaker 1, and each corresponding arc-extinguishing grating group comprises three arc-extinguishing grating pieces.
The circuit breaker 1 system is used and installed in the process that the flashover cover 3 provided with the arc extinguishing barrier is installed on the circuit breaker 1 through fastening screws, finally the circuit breaker 1 provided with the flashover cover 3 is placed in the installation groove on the insulating base 5, and when the circuit breaker 1 and the flashover cover 3 are installed, the insulating base 5 provided with the circuit breaker 1 and the flashover cover 3 is fixed on a metal installation plate.
The working principle of the circuit breaker 1 system is as follows: when the main loop of the circuit breaker 1 is short-circuited, the electric arc is firstly contacted with the arc extinguishing grating after being sprayed out from the interior of the circuit breaker 1, the electric arc is divided by the meshes 10 on the arc extinguishing grating and cools the electric arc, the voltage of the electric arc is improved, the energy of the electric arc is reduced after passing through the first arc extinguishing grating, and then the energy of the electric arc is reduced through the second arc extinguishing grating and the third arc extinguishing grating, so that the energy sprayed out of the arc flying cover 3 is little, and the secondary short circuit of a wire inlet end caused by the spraying of the electric arc is avoided.
The insulating base 5 is matched with the circuit breaker 1 and the flashover cover 3, and when short-circuit current is generated, on one hand, the short circuit between the electric arc and the bottom metal plate is avoided due to the insulation of the insulating base 5 and the bottom metal mounting plate. On the other hand, the circuit breaker 1 avoids the explosion of the two sides of the circuit breaker 1 due to the over-high arc energy because of the reinforcement of the strip-shaped top block 11.
The flying arc cover 3 also ensures that the short-circuit current in the short-circuit breaking index of the circuit breaker 1 cannot crack due to overlarge electric arc energy because of the limit of the arc extinguishing barrier and the bottom insulating base 5.
The mutual cooperation of arc extinguishing bars piece, cover 3 and insulator foot 5 can not only reduce the flashover distance of circuit breaker 1, prevents that electric arc from arousing the short circuit in circuit breaker 1 upper end, can guarantee the integrality of circuit breaker 1 and cover 3 self structure moreover, has improved the breaking capacity of circuit breaker 1.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model provides a reduce circuit breaker system of flashover distance, in this system, the flashover cover has played phase-to-phase insulating's effect, prevents that electric arc from spouting outward causing with other circuit breaker short circuits, and arc extinction coral piece can play the cooling and cut apart the effect of electric arc, has reduced the blowout of electric arc. The arc extinguishing barrier piece can support the arc flying cover and prevent the arc flying cover from breaking when bearing arc energy. The circuit breaker and the arcing shield are arranged in the groove of the insulating base, short circuit among electric arcs and short circuit between the electric arcs and the bottom metal mounting plate are prevented, and short circuit of a wire inlet end caused by ejection of the electric arcs is finally avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (5)
1. A circuit breaker system for reducing arcing distance, comprising: the arc flying circuit breaker comprises a circuit breaker, an arc flying cover and an insulating base; the upper surface of the insulating base is sunken towards the inside of the insulating base to form a mounting groove, the circuit breaker and the flashover cover are arranged in the mounting groove in parallel, and the flashover cover is fixedly connected with the circuit breaker; the inner wall of one circumferential side of the mounting groove is provided with vertically extending strip-shaped bulges, the outer wall of one circumferential side of the flying arc cover is provided with strip-shaped slots which are correspondingly matched and spliced with the strip-shaped bulges, and the strip-shaped bulges are correspondingly spliced with the strip-shaped slots respectively so as to fixedly connect the flying arc cover with the insulating base; three arc suppression grid groups are arranged in the flying arc shield in parallel at intervals, each arc suppression grid group corresponds to three phases of the circuit breaker, each arc suppression grid group comprises at least three arc suppression grid pieces which are arranged in parallel at intervals, and each arc suppression grid piece extends vertically in the direction parallel to the strip-shaped slot; and a plurality of meshes which penetrate through the two opposite sides of the arc-extinguishing grating are uniformly arranged on the arc-extinguishing grating.
2. The reduced arcing distance circuit breaker system of claim 1, wherein: the arc extinction grating piece is characterized in that clamping protrusions which protrude outwards and extend in the direction parallel to the arc extinction grating piece are arranged on two opposite sides of one end of the arc extinction grating piece respectively, clamping grooves are formed in the upper surface of the bottom of the arc extinction grating cover, the clamping protrusions are correspondingly inserted into the clamping grooves, the arc extinction grating piece is fixed in the arc extinction grating cover, and the other end of the arc extinction grating piece extends vertically upwards and correspondingly abuts against the lower surface of the top of the arc extinction grating cover.
3. The reduced arcing distance circuit breaker system of claim 2, wherein: the arc-extinguishing grating sheets are parallel to the two opposite sides of the strip-shaped slot and bent towards the direction far away from the circuit breaker, so that the cross sections of the arc-extinguishing grating sheets perpendicular to the strip-shaped slot are U-shaped.
4. The reduced arcing distance circuit breaker system of claim 3, wherein: the utility model discloses a circuit breaker, including the arc cover, the arc cover top is close to one side of circuit breaker is to being close to the direction protrusion of circuit breaker extends and forms the apron, the apron corresponds the cover and is in the upper surface of circuit breaker, the apron with the top correspondence of circuit breaker is provided with first mounting hole and second mounting hole, and the fastener correspondence is passed first mounting hole and second mounting hole will the arc cover with circuit breaker fixed connection.
5. The reduced arcing distance circuit breaker system of claim 4, wherein: the inner walls of two circumferentially opposite sides of the mounting groove are respectively provided with at least one strip-shaped top block which protrudes and extends inwards, and the extending end of each strip-shaped top block is correspondingly attached and contacted with the outer peripheral wall of the circuit breaker; the strip-shaped top block is parallel to the strip-shaped bulges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190765.8U CN214753590U (en) | 2021-05-31 | 2021-05-31 | Circuit breaker system capable of reducing arcing distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190765.8U CN214753590U (en) | 2021-05-31 | 2021-05-31 | Circuit breaker system capable of reducing arcing distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214753590U true CN214753590U (en) | 2021-11-16 |
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ID=78626331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121190765.8U Active CN214753590U (en) | 2021-05-31 | 2021-05-31 | Circuit breaker system capable of reducing arcing distance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214753590U (en) |
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2021
- 2021-05-31 CN CN202121190765.8U patent/CN214753590U/en active Active
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