CN216771829U - Contact box with leakage current sensor - Google Patents
Contact box with leakage current sensor Download PDFInfo
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- CN216771829U CN216771829U CN202123187584.2U CN202123187584U CN216771829U CN 216771829 U CN216771829 U CN 216771829U CN 202123187584 U CN202123187584 U CN 202123187584U CN 216771829 U CN216771829 U CN 216771829U
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- leakage current
- current sensor
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- insert
- insulating resin
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Abstract
The utility model discloses a contact box with a leakage current sensor, which comprises an insulating resin casting body, the leakage current sensor and a static contact mounting insert, wherein the insulating resin casting body comprises a casting cylinder body and a flange, an upper wire outlet hole is formed in one side of the top of the casting cylinder body, an inner ring groove is formed in the casting cylinder body, the leakage current sensor comprises an iron core, a secondary winding, a secondary lead, a terminal insert and a secondary terminal, the secondary winding is connected with the terminal insert through the secondary lead, the iron core, the secondary winding, the secondary lead and the terminal insert are sealed in the insulating resin casting body, a threaded hole is formed in the terminal insert, and the static contact mounting insert is arranged on the insulating resin casting body. The utility model effectively solves the problems of no detection, alarm and protection before fault arcing in the existing high-voltage switch cabinet, and prolongs the service life of equipment.
Description
Technical Field
The utility model relates to the technical field of contact boxes, in particular to a contact box with a leakage current sensor.
Background
The high-voltage switch cabinet is used for power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system and plays roles of on-off, control or protection and the like. The interior of the high-voltage switch cabinet is divided into a plurality of functional chambers, and a plurality of contact boxes are usually adopted to connect the chambers for the convenience of operation and use.
In high-voltage switch cabinets, internal arcing basically occurs due to ground discharge or interphase discharge caused by the reduction of the insulation strength. When the discharge phenomenon occurs, there is a large energy transition. In general, manufacturers mainly aim at various designs for reducing damage to equipment after internal arcing occurs, and detection, alarm and protection before internal fault arcing are rarely considered. In view of the related technical problems, no effective solution has been proposed at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a contact box with a leakage current sensor, aiming at solving the technical problems existing in the prior art, and aims to effectively solve the problems of detection, alarming and protection before fault arcing in the prior high-voltage switch cabinet and prolong the service life of the high-voltage switch cabinet.
In order to achieve the purpose, the utility model provides the following technical scheme: a contact box with a leakage current sensor comprises an insulating resin casting body, the leakage current sensor and a static contact mounting insert, wherein the insulating resin casting body comprises a casting cylinder body and a flange, the flange is arranged on the casting cylinder body, one side of the top of the casting cylinder body is provided with an upper wire outlet, the periphery of the flange is provided with flange holes, the casting cylinder body is provided with an inner ring groove, the leakage current sensor comprises an iron core, a secondary winding, a secondary lead, a terminal insert and a secondary terminal, the secondary winding is wound on the outer surface of the iron core and is connected with the terminal insert through the secondary lead, the iron core, the secondary winding, the secondary lead and the terminal insert are sealed in the insulating resin casting body, the terminal insert is provided with a threaded hole, the outer surface of the secondary terminal is provided with an external thread, and one end of the secondary terminal extends into the threaded hole, and the static contact mounting insert is arranged on the insulating resin casting body.
Preferably, the flange is of a square configuration.
Preferably, the corners of the flange are provided with chamfers.
Preferably, the inner ring groove is of a circular structure.
Preferably, the wire outlet hole is of a rectangular structure.
Compared with the prior art, the utility model has the beneficial effects that:
by arranging the insulating resin pouring body, the leakage current sensor and the static contact mounting insert, the problems of detection, alarming and protection before fault arcing does not exist in the conventional high-voltage switch cabinet are effectively solved, the service life of the high-voltage switch cabinet is prolonged, the safety performance is improved, meanwhile, manual operation is reduced, the labor intensity is reduced, the cost is effectively saved, when current flows through a moving contact and a static contact of a circuit breaker, the external arc light protection detection device can measure corresponding leakage current through a secondary terminal, and when the leakage current reaches the alarm, the arc light protection detection device sends out an alarm signal; when the leakage current reaches the protection limit value, the arc protection detection device starts protection tripping.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic front view of the present invention;
FIG. 4 is an enlarged schematic view of section A of FIG. 1;
FIG. 5 is a schematic sectional view of a high voltage switchgear;
fig. 6 is an enlarged schematic view of a portion B of fig. 5.
In the reference symbols: 1. an insulating resin casting; 101. casting the cylinder body; 102. an inner ring; 103. a flange hole; 104. an upper wire outlet hole; 105. a flange; 2. a leakage current sensor; 201. an iron core; 202. a secondary winding; 203. a secondary lead; 204. a terminal insert; 205. a secondary terminal; 3. a static contact is provided with an insert; 4. a cabinet body; 5. a partition plate; 6. a circuit breaker; 7. static contact; 8. moving contact.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Examples
Referring to fig. 1-6, the present invention provides a contact box with a leakage current sensor, which comprises: a contact box with a leakage current sensor comprises an insulating resin casting body 1, a leakage current sensor 2 and a static contact mounting insert 3, wherein the insulating resin casting body 1 comprises a casting cylinder body 101 and flanges 105, the flanges 105 are arranged on the casting cylinder body 101, concretely, the cross section of the casting cylinder body 101 can be set to be circular or square, one side of the top of the casting cylinder body 101 is provided with an upper wire outlet 104, the peripheries of the flanges 105 are provided with flange holes 103, concretely, four flange holes 103 are arranged and are arranged symmetrically at equal intervals, the casting cylinder body 101 is provided with an inner ring groove 102, the leakage current sensor 2 comprises an iron core 201, a secondary winding 202, a secondary lead 203, a terminal insert 204 and a secondary terminal 205, the secondary winding 202 is wound on the outer surface of the iron core 201, the secondary winding 202 is connected with the terminal insert 204 through the secondary lead 203, and the iron core 201, the secondary winding 202, the secondary lead 203 and the terminal insert 204 are sealed in the insulating resin casting body 1, a threaded hole is formed in the terminal insert 204, an external thread is formed on the outer surface of the secondary terminal 205, one end of the secondary terminal 205 extends into the threaded hole and is in threaded connection with the terminal insert 204, the static contact mounting insert 3 is arranged on the insulating resin casting body 1, and particularly, the static contact 7 on the circuit breaker 6 can be conveniently mounted by arranging the static contact mounting insert 3.
Referring to fig. 2, further, the flange 105 has a square configuration.
Referring to fig. 2, further, the flange 105 is provided with a chamfer at its corner.
Referring to fig. 2, further, the inner ring 102 is a circular structure.
Referring to fig. 1 and 3, further, the wire outlet 104 has a rectangular structure.
Specifically, the working principle and the using process of the utility model are as follows:
as shown in fig. 5, a contact box with a leakage current sensor is installed on a partition plate 5 of a cabinet body 4, a static contact 7 is installed inside the contact box with the leakage current sensor, a cable is connected with an external protection device, a circuit breaker 6 is pushed into the cabinet body 4, a pushing mechanism of the circuit breaker 6 is shaken to enable the circuit breaker 6 to move towards the inside of the cabinet body 4, the meshing condition of a moving contact 8 and the static contact 7 of the circuit breaker 6 is shown in fig. 6, the moving contact 8 and the static contact 7 of the circuit breaker 6 are meshed, and a secondary terminal 205 is connected into an external arc light protection detection device.
When the current flows through the moving contact 8 and the static contact 7 of the circuit breaker 6, the external arc protection detection device can measure the corresponding leakage current through the secondary terminal 205, and when the leakage current reaches the alarm, the arc protection detection device sends out an alarm signal; when leakage current reaches the protection limit value, the arc light protection detection device starts protection tripping, so that the safety is improved, the problems of detection, alarming and protection before fault arcing does not exist in the conventional high-voltage switch cabinet are effectively solved, and the service life of the high-voltage switch cabinet is prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by 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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The contact box with the leakage current sensor is characterized by comprising an insulating resin casting body (1), the leakage current sensor (2) and a static contact mounting insert (3), wherein the insulating resin casting body (1) comprises a casting cylinder body (101) and a flange (105), the flange (105) is arranged on the casting cylinder body (101), an upper wire outlet (104) is formed in one side of the top of the casting cylinder body (101), flange holes (103) are formed in the periphery of the flange (105), an inner ring groove (102) is formed in the casting cylinder body (101), the leakage current sensor (2) comprises an iron core (201), a secondary winding (202), a secondary lead (203), a terminal insert (204) and a secondary terminal (205), the secondary winding (202) is wound on the outer surface of the iron core (201), and the secondary winding (202) is connected with the terminal insert (204) through the secondary lead (203), the iron core (201), the secondary winding (202), the secondary lead (203) and the terminal insert (204) are sealed in the insulating resin casting body (1), a threaded hole is formed in the terminal insert (204), an external thread is arranged on the outer surface of the secondary terminal (205), one end of the secondary terminal (205) extends into the threaded hole and is in threaded connection with the terminal insert (204), and the static contact mounting insert (3) is arranged on the insulating resin casting body (1).
2. The contact box with the leakage current sensor according to claim 1, wherein: the flange (105) is of a square structure.
3. The contact box with the leakage current sensor according to claim 1, wherein: and the corners of the flange (105) are provided with chamfers.
4. The contact box with the leakage current sensor according to claim 1, wherein: the inner ring groove (102) is of a circular structure.
5. The contact box with the leakage current sensor according to claim 1, wherein: the upper wire outlet hole (104) is in a rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187584.2U CN216771829U (en) | 2021-12-17 | 2021-12-17 | Contact box with leakage current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123187584.2U CN216771829U (en) | 2021-12-17 | 2021-12-17 | Contact box with leakage current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216771829U true CN216771829U (en) | 2022-06-17 |
Family
ID=81967410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123187584.2U Active CN216771829U (en) | 2021-12-17 | 2021-12-17 | Contact box with leakage current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216771829U (en) |
-
2021
- 2021-12-17 CN CN202123187584.2U patent/CN216771829U/en active Active
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