A power cabinet with increased arc distance

Abstract

A power cabinet with increased arcing distance includes a cabinet, a circuit breaker, an arc-isolating plate, a first insulating plate and a third insulating plate. A drawer is provided in the cabinet, and the circuit breaker is provided in the drawer. The invention is characterized in that an arc-isolating plate is provided between the incoming line side of the circuit breaker and the left side of the drawer, and the arc-isolating plate separates the mounting grooves of the wiring sockets for the electrical connection of the cables of the circuit breaker one by one; through holes are provided at the left side of the cabinet and the left side of the drawer corresponding to the circuit breaker, a first insulating plate covering the through hole is provided on the inner side of the left side of the drawer, a third insulating plate covering the through hole is provided on the outer side of the left side of the cabinet, a grille is provided on the first insulating plate, and one end of the arc-isolating plate passes through the grille of the first insulating plate and is placed in the through hole. The advantages are: first, the distance between the cabinets is reasonably utilized to expand the arcing distance and effectively extinguish the arc; second, the thickness of the cabinet wall is reasonably utilized to expand the arcing distance; third, the safety is high and the space is reasonably utilized.

Description

Technical Field

[0001] The invention relates to an electric power cabinet with increased arcing distance. Background Art

[0002] When the power switch is tested for its ultimate short-circuit breaking capacity (Icu), or when the power switch is cutting off the short-circuit current on the output side, an arc will be generated between the static contact and the moving contact when the switch is disconnected. This is called flashover. If the flashover space is not long enough, the airflow generated by the short circuit cannot be released quickly, and it is easy to cause flashover short-circuit faults.

[0003] A low-voltage withdrawable switch cabinet comprises a cabinet body and a door panel, wherein the cabinet body and the door panel are assembled from a C-profile frame by screws and bolts, a mesh cover is arranged on the top of the cabinet body, and the inner part of the cabinet body is divided into a busbar area, an electrical equipment area and a cable area by steel plates, wherein the cable area is arranged at the top layer of the cabinet body, a busbar area and an electrical equipment area are arranged below the cable area, a plurality of drawer units are arranged from top to bottom in the electrical equipment area, an N line and a PE line are arranged at the bottom of the cabinet body, and a manual mechanism of a circuit breaker is arranged on the door panel.

[0004] The disadvantage is that the arc flying distance is not enough and the arc cannot be extinguished effectively. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a power cabinet with increased arcing distance.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an electric power cabinet with increased arcing distance, comprising a cabinet body, a circuit breaker, an arc isolation plate, a first insulating plate and a third insulating plate, a drawer is arranged in the cabinet body, the circuit breaker is arranged in the drawer, an arc isolation plate is arranged between the incoming line side of the circuit breaker and the left side of the drawer, and the arc isolation plate separates the mounting grooves of the wiring sockets electrically connected to the cables of the circuit breaker one by one; through holes are provided on the left side of the cabinet body and the left side of the drawer corresponding to the circuit breaker, a first insulating plate covering the through hole is provided on the inner side of the left side of the drawer, a third insulating plate covering the through hole is provided on the outer side of the left side of the cabinet body, a grille is provided on the first insulating plate, and one end of the arc isolation plate passes through the grille of the first insulating plate and is placed in the through hole.

[0007] Furthermore, the third insulating plate is a closed solid insulating plate.

[0008] Furthermore, the left side of the cabinet is the side opposite to the incoming line side of the circuit breaker, the left side of the drawer is the side opposite to the incoming line side of the circuit breaker, and the incoming line side of the circuit breaker is the left side of the circuit breaker.

[0009] Furthermore, one end of the arc isolation plate passes through the grid of the first insulating plate and does not exceed the third insulating plate.

[0010] Furthermore, several cabinets are connected in parallel, and gaps are formed between adjacent cabinets. A third insulating plate covering the through hole is provided on the outer side of the left side of one cabinet, a second insulating plate is provided on the outer side of the right side of the adjacent cabinet, and a grille is provided on the third insulating plate.

[0011] Furthermore, one end of the arc isolation plate passes through the grid of the first insulating plate and does not exceed the third insulating plate.

[0012] Furthermore, the second insulating board is a closed solid insulating board, which is installed on the metal partition on the right side of the adjacent cabinet.

[0013] Furthermore, the left side of the cabinet is the side opposite to the incoming line side of the circuit breaker, the left side of the drawer is the side opposite to the incoming line side of the circuit breaker, and the incoming line side of the circuit breaker is the left side of the circuit breaker.

[0014] The beneficial effects of the present invention are: first, the distance between cabinets is reasonably utilized to expand the arcing distance and effectively extinguish the arc; second, the thickness of the cabinet wall is reasonably utilized to expand the arcing distance; third, it has high safety and reasonable utilization of space, solving the problem of insufficient arcing distance caused by cabinet limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a perspective view of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the attached embodiment of the present invention Figure 1-2 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1 Reference Figure 1-2 A power cabinet with increased arcing distance includes a cabinet, a circuit breaker 2, an arc isolation plate 10, a first insulating plate 6 and a third insulating plate 8. A drawer 1 is provided in the cabinet, the circuit breaker 2 is provided in the drawer 1, an arc isolation plate 10 is provided between the incoming line side of the circuit breaker 2 and the left side 3 of the drawer, and the arc isolation plate 10 separates the mounting grooves of the wiring sockets for the electrical connection of the cables of the circuit breaker 2 one by one; a through hole 4 is provided at the left side 3 of the drawer and the left side of the cabinet corresponding to the circuit breaker, a first insulating plate 6 covering the through hole 4 is provided on the inner side of the left side 3 of the drawer, a third insulating plate 8 covering the through hole 4 is provided on the outer side of the left side of the cabinet, a grille 11 is provided on the first insulating plate 6, and one end of the arc isolation plate 10 passes through the grille 11 of the first insulating plate 6 and is placed in the through hole 4. The drawer is installed in the cabinet in a pull-out manner, and the outer side of the drawer and the inner side of the cabinet are tightly connected and slidably connected.

[0019] A power cabinet with increased arcing distance, wherein the third insulating plate 8 is a closed solid insulating plate.

[0020] An electric power cabinet with increased arcing distance, wherein one end of an arc isolation plate passes through a grid of a first insulating plate and does not exceed a third insulating plate.

[0021] A power cabinet with increased arcing distance, wherein evenly distributed threaded holes are arranged on the left side 3 and the right side of the drawer. Evenly distributed threaded holes are arranged on the left side and the right side of the cabinet.

[0022] The utility model relates to a power cabinet with a larger arcing distance, wherein the left side of the cabinet body is the side opposite to the incoming line side of the circuit breaker, and the left side of the drawer is the side opposite to the incoming line side of the circuit breaker.

[0023] A power cabinet with increased arcing distance, wherein the incoming line side of the circuit breaker is the left side of the circuit breaker.

[0024] A power cabinet with increased arcing distance, wherein a first insulating plate 6 and a third insulating plate 8 are fixed to a cabinet body by screws.

[0025] A power cabinet with increased arcing distance increases the arcing distance through the gap between the third insulating plate and the circuit breaker 2.

[0026] Embodiment 2 A power cabinet with increased arcing distance, wherein a plurality of cabinets 1 are connected in parallel, and gaps 5 are formed between adjacent cabinets 1. A third insulating plate 8 covering a through hole is provided on the outer side of the left side 3 of one cabinet, and a second insulating plate 7 is provided on the outer side of the right side of the adjacent cabinet, and a grille is provided on the third insulating plate 8.

[0027] A power cabinet with increased arcing distance, wherein one end of an arc isolation plate 10 passes through a grid 11 of a first insulating plate 6 and does not exceed a third insulating plate 8.

[0028] The left side 3 and the right side of the drawer are provided with evenly distributed threaded holes. The left side and the right side of the cabinet are provided with evenly distributed threaded holes.

[0029] The utility model relates to a power cabinet with a larger arcing distance, wherein the left side of the cabinet body is the side opposite to the incoming line side of the circuit breaker, and the left side of the drawer is the side opposite to the incoming line side of the circuit breaker.

[0030] A power cabinet with increased arcing distance, wherein the incoming line side of the circuit breaker is the left side of the circuit breaker.

[0031] A power cabinet with increased arcing distance, wherein a first insulating plate 6, a third insulating plate 8 and a second insulating plate 7 are fixed to a cabinet body by screws.

[0032] A power cabinet with increased arcing distance, wherein a metal partition plate 9 is fixed to the rear side of a second insulating plate 7.

[0033] A power cabinet with increased arcing distance, wherein the second insulating plate is a closed solid insulating plate installed on a metal partition plate of an adjacent cabinet.

[0034] A power cabinet with increased arcing distance fully utilizes the gap between cabinet bodies and increases the arcing distance.

[0035] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power cabinet with increased arcing distance, comprising a cabinet, a circuit breaker, an arc isolation plate, a first insulating plate and a third insulating plate, wherein a drawer is provided in the cabinet, and the circuit breaker is provided in the drawer, wherein: An arc-isolating plate is provided between the incoming line side of the circuit breaker and the left side of the drawer, and the arc-isolating plate separates the mounting grooves of the wiring sockets electrically connected to the cables of the circuit breaker one by one; through holes are provided on the left side of the cabinet and the left side of the drawer corresponding to the circuit breaker, a first insulating plate covering the through hole is provided on the inner side of the left side of the drawer, a third insulating plate covering the through hole is provided on the outer side of the left side of the cabinet, a grille is provided on the first insulating plate, and one end of the arc-isolating plate passes through the grille of the first insulating plate and is placed in the through hole; The left side of the cabinet is the side opposite to the incoming line side of the circuit breaker, the left side of the drawer is the side opposite to the incoming line side of the circuit breaker, and the incoming line side of the circuit breaker is the left side of the circuit breaker; One end of the arc isolation plate passes through the grid of the first insulating plate and does not exceed the third insulating plate; Several cabinets are connected in parallel, with gaps between adjacent cabinets. A third insulating plate covering the through hole is provided on the outer side of the left side of one cabinet, a second insulating plate is provided on the outer side of the right side of the adjacent cabinet, and a grille is provided on the third insulating plate.

2. The power cabinet with increased arcing distance according to claim 1, characterized in that: The third insulating plate is a closed solid insulating plate.

3. The power cabinet with increased arcing distance according to claim 1, characterized in that: The second insulating board is a closed solid insulating board and is installed on the metal partition on the right side of the adjacent cabinet.

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