CN219123795U - 12kV contact box suitable for working environment - Google Patents
12kV contact box suitable for working environment Download PDFInfo
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- CN219123795U CN219123795U CN202222985341.1U CN202222985341U CN219123795U CN 219123795 U CN219123795 U CN 219123795U CN 202222985341 U CN202222985341 U CN 202222985341U CN 219123795 U CN219123795 U CN 219123795U
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Abstract
The utility model relates to a 12kV contact box suitable for a working environment, which comprises an epoxy resin casting body and an embedded fixed contact, wherein the embedded fixed contact is arranged in the epoxy resin casting body, and a vent is arranged on the epoxy resin casting body; the embedded fixed contact is provided with three internal threads and is used for installing the fixed contact of the moving contact of the adaptive breaker. The 12kV contact box solves the problem that the medium-voltage handcart type switch cabinet has limited inner space and a primary component current transformer cannot be connected with a busbar, the whole contact box is formed by casting epoxy resin, and umbrella rings are arranged on the inner wall and the outer wall of the contact box, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box is effectively improved.
Description
Technical Field
The utility model relates to a contact box in a medium-voltage handcart type switch cabinet, in particular to a 12kV contact box applicable to a working environment.
Background
The contact box is an epoxy resin APG process pressure gel forming structure and is used for various handcart type switch cabinets, and plays roles of insulation isolation and connection transition. Such as Chinese patent bulletin number CN 216818958U discloses an integral type contact box for switchgear, including the contact box body, be equipped with a plurality of pre-buried stationary contacts on the contact box body, the upper and lower ends of pre-buried stationary contact all are equipped with ventilation convection hole, pre-buried stationary contact is connected with the pipe generating line, the contact end of pipe generating line be outer cone, the inside of outer cone be equipped with the inside internal cone complex steel wire thread bush of pre-buried stationary contact, have the characteristics of adopting the embedded steel wire thread bush of front end cone pipe generating line, take the three-phase integral type contact box of ventilation.
The existing contact box is free of embedded fixed contacts, the contact box structure enables bus lap joints to be required to lead wires from the upper portion of the contact box, bus arrangement occupies large space of a cabinet body, and the bus lap joints are inside the contact box, so that construction is difficult.
Therefore, there is a need for a contact box that is suitable for use in a working environment. The bus bar is used for solving the problem that the internal space of the medium-voltage handcart type switch cabinet is limited, the primary component current transformer cannot be connected with a bus bar, and the bus bar is lapped on the pre-buried static contact outside the contact box, so that the connection is more convenient.
Disclosure of Invention
The utility model aims to provide a 12kV contact box suitable for a working environment, which solves the problem that a primary component current transformer cannot be connected with a busbar due to limited space in a medium-voltage handcart type switch cabinet, and the whole contact box is formed by casting epoxy resin, and umbrella rings are arranged on the inner wall and the outer wall of the contact box, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box is effectively improved.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the 12kV contact box suitable for the working environment comprises an epoxy resin casting body and an embedded fixed contact, wherein the embedded fixed contact is arranged in the epoxy resin casting body, and a vent is arranged on the epoxy resin casting body; the embedded fixed contact is provided with three internal threads and is used for installing the fixed contact of the moving contact of the adaptive breaker.
Furthermore, the epoxy resin casting body is formed by casting epoxy resin, and umbrella rings are arranged on the inner wall and the outer wall of the epoxy resin casting body, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box can be effectively improved.
Further, the 12kV contact box is assembled at the middle partition of the medium voltage handcart type switch cabinet with the voltage level of 12kV and below through four installation screw inserts.
The beneficial effects of the utility model are as follows:
the contact box solves the problem that the medium-voltage handcart type switch cabinet has limited inner space and the primary component current transformer cannot be connected with the busbar, the whole contact box is formed by casting epoxy resin, and the inner wall and the outer wall are provided with umbrella rings, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box is effectively improved.
Compared with the prior art, the utility model has different connecting directions with the bus, and the static contact is pre-buried; the contact box main body is cast by a mould and integrally formed; the bus-bar connection structure has the characteristics of good heat dissipation performance, convenience in bus connection, diversified bus connection modes and the like.
Drawings
Fig. 1 is a cross-sectional view of a 12kV contact box of the present utility model;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic view of the external structure of the 12kV contact box of the present utility model.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 1 to 3, a 12kV contact box suitable for use in a working environment in an embodiment of the present utility model includes an epoxy resin casting body 1, an installation screw insert 2, and an embedded fixed contact 3. The epoxy resin casting body 1 is internally provided with an embedded fixed contact 3, and the epoxy resin casting body 1 is provided with a vent. And the embedded fixed contacts 3 are provided with three internal threads and are used for installing the fixed contacts of the moving contacts of the adaptive circuit breaker by being assembled at the middle partition of the medium-voltage handcart type switch cabinet with the voltage level of 12kV and below through four installation thread inserts 2.
The whole contact box is formed by casting epoxy resin, and umbrella rings are arranged on the inner wall and the outer wall of the contact box, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box is effectively improved.
The utility model is mainly characterized in that the fixed contact is pre-buried, the bus connection direction is different, and the bus is provided with a vent
To meet the electrical insulation requirements of the switchgear, the customized contact box specifies the following requirements:
(1) the surface of the product is smooth, bright, free of speckles and mechanical damage;
(2) rated current: 3150A; (3) rated operating voltage: 12kV;
(4) rated frequency: 50Hz;
(5) rated short-time power frequency withstand voltage: 42/48kV rated lightning impulse withstand voltage: 75/85 kV. Short-term heat tolerance: 63 kA.1S, peak current is tolerated by short-time force: 160kA;
(6) R2-R5 is not rounded;
(7) the draft angle was not injected 1 °.
The specific implementation process of the utility model comprises the following steps:
(1) after installation, a general insulating cover plate is required to be arranged;
(2) the static contact connected with the moving contact of the circuit breaker is installed by using a special tool;
(3) if the distance between the upper contact arm and the lower contact arm of the circuit breaker is too small and the insulation requirement is not met after the contact box is installed, the bus chamber is provided with an insulation baffle;
(4) and selecting bus lap joint holes: the bus width is 60mm-100mm, 3-hole connection is adopted, and when the bus width is more than or equal to 110mm, 4-hole connection is adopted.
Claims (3)
1. 12kV contact box suitable for under operational environment, its characterized in that: comprises an epoxy resin casting body, a pre-buried fixed contact, the epoxy resin casting body is internally provided with an embedded fixed contact, and is provided with a vent; the embedded fixed contact is provided with three internal threads and is used for installing the fixed contact of the moving contact of the adaptive breaker.
2. The 12kV contact box adapted for use in an operating environment of claim 1, wherein: the epoxy resin casting body is formed by casting epoxy resin, and umbrella rings are arranged on the inner wall and the outer wall of the epoxy resin casting body, so that the creepage distance can be effectively increased, and the insulation regulation is met; the front end of the outer wall is provided with a heat dissipation opening, so that the heat dissipation performance of the contact box can be effectively improved.
3. 12kV contact box suitable for use in an operating environment according to claim 1 or 2, characterized in that: the 12kV contact box is assembled at the middle partition plate of the medium-voltage handcart type switch cabinet with the voltage level of 12kV and below through four installation screw inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985341.1U CN219123795U (en) | 2022-11-09 | 2022-11-09 | 12kV contact box suitable for working environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222985341.1U CN219123795U (en) | 2022-11-09 | 2022-11-09 | 12kV contact box suitable for working environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219123795U true CN219123795U (en) | 2023-06-02 |
Family
ID=86527939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222985341.1U Active CN219123795U (en) | 2022-11-09 | 2022-11-09 | 12kV contact box suitable for working environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219123795U (en) |
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2022
- 2022-11-09 CN CN202222985341.1U patent/CN219123795U/en active Active
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