CN216773812U

CN216773812U - Wall bushing with leakage current sensor

Info

Publication number: CN216773812U
Application number: CN202123187588.0U
Authority: CN
Inventors: 彭忠富
Original assignee: Zhongqian Electric Group Co ltd
Current assignee: Zhongqian Electric Group Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-06-17
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses a wall bushing with a leakage current sensor, which comprises an insulating resin casting body, a first leakage current sensor and a second leakage current sensor, wherein the insulating resin casting body comprises a casting cylinder, a skirt edge and a flange, the skirt edge is arranged on the casting cylinder, the flange is arranged at the center of the casting cylinder, the first leakage current sensor and the second leakage current sensor respectively comprise 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, a through hole is formed in the middle of the casting cylinder, and a bus is arranged on the through hole in a penetrating mode. The utility model effectively solves the problems of detection, alarm and protection before fault-free arcing in the existing high-voltage switch cabinet, improves the safety and prolongs the service life of the high-voltage switch cabinet.

Description

Wall bushing with leakage current sensor

Technical Field

The utility model relates to the technical field of high-voltage switch cabinets, in particular to a wall bushing 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 high-voltage switch cabinet is used as an electric appliance product with the voltage grade of 3.6kV to 550kV, a high-voltage isolating switch, a grounding switch, a high-voltage load switch, a high-voltage automatic reclosing and sectionalizing device, a high-voltage operating mechanism, a high-voltage explosion-proof power distribution device, a high-voltage switch cabinet and the like.

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. To this end, we propose a wall bushing with a leakage current sensor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wall bushing 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-free arcing in the prior high-voltage switch cabinet, improve the safety 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 wall bushing with a leakage current sensor comprises an insulating resin casting body, a first leakage current sensor and a second leakage current sensor, the insulating resin casting body comprises a casting cylinder body, a skirt edge and a flange, the skirt edge is arranged on the casting cylinder body, the flange is arranged at the center of the pouring cylinder body, the first leakage current sensor and the second leakage current sensor respectively comprise 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 a secondary lead, the terminal insert is provided with an internal thread hole, the outer surface of one end of the secondary terminal is provided with an external thread, the terminal insert is in threaded connection with the secondary terminal, a through hole is formed in the middle of the pouring cylinder, and a bus penetrates through the through hole.

Preferably, the core, the secondary winding, the secondary lead and the terminal insert are sealed in an insulating resin molding body.

Preferably, flange holes are formed in the periphery of the flange, and the four flange holes are symmetrically arranged at equal intervals.

Preferably, the skirt edges are arranged in a plurality of equal-distance distribution.

Preferably, the flange is of a square configuration.

Preferably, the corners of the flange are provided with chamfers.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model relates to a wall bushing with a current transformer.A casting body of insulating resin is arranged, penetrates through a flange hole on a flange through a fastener and extends into a high-voltage cabinet body, so that a casting cylinder is arranged on a side plate of the high-voltage cabinet body, a bus passes through the middle of a through hole of the casting cylinder to complete the installation of the casting body of insulating resin, a secondary terminal is connected into an external arc light protection detection device, when current flows through the bus, the corresponding leakage current can be measured, and if the leakage current reaches an alarm, the arc light protection detection device sends an alarm signal; when the leakage current reaches the protection limit value, the arc light protection detection device starts protection tripping, so that the problems of detection, alarming and protection before fault-free arcing in the existing high-voltage switch cabinet are effectively solved, the safety is improved, and the service life of the high-voltage switch cabinet is prolonged.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is an enlarged schematic view of section A of FIG. 1;

FIG. 3 is an enlarged schematic view of the portion B of FIG. 1;

FIG. 4 is a schematic overall structure of the present invention;

FIG. 5 is a schematic structural view of a flange of the present invention;

in the reference symbols: 1. an insulating resin casting body; 101. casting the cylinder body; 102, skirt; 103. a flange; 104. a flange hole; 105. a through hole; 2. a first leakage current sensor; 3. a second leakage current sensor; 401. an iron core; 402. a secondary winding; 403. a secondary lead; 404. a terminal insert; 405. a secondary terminal; 4. a high-voltage cabinet body; 5. and a bus bar.

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. 1-5, the present invention provides a wall bushing with a leakage current sensor, which comprises: a wall bushing with a leakage current sensor comprises an insulating resin casting body 1, a first leakage current sensor 2 and a second leakage current sensor 3, wherein the insulating resin casting body 1 comprises a casting cylinder body 101, a skirt edge 102 and a flange 103, the skirt edge 102 is arranged on the casting cylinder body 101, the flange 103 is arranged at the center of the casting cylinder body 101, the first leakage current sensor 2 and the second leakage current sensor 3 both comprise iron cores 401, secondary winding 402, secondary lead 403, terminal inserts 404 and secondary terminal 405, secondary winding 402 winding sets up at the surface of iron core 401, and secondary winding 402 passes through secondary lead 403 and is connected with terminal inserts 404, has seted up the internal thread hole on the terminal inserts 404, and the one end surface of secondary terminal 405 is provided with the external screw thread, and terminal inserts 404 and secondary terminal 405 threaded connection, through-hole 105 has been seted up at the middle part of pouring barrel 101, wears to be equipped with generating line 5 on the through-hole 105.

Referring to fig. 1 to 3, further, the core 401, the secondary winding 402, the secondary lead 403, and the terminal insert 404 are sealed in the insulating resin molded body 1.

Referring to fig. 1 and 5, further, flange holes 104 are formed around the flange 103, and the four flange holes 104 are arranged symmetrically and equidistantly.

Referring to fig. 1 and 4, further, a plurality of skirts 102 are disposed and equidistantly distributed.

In the present embodiment, six skirts 102 are provided, and the length of the skirts 102 satisfies the insulation requirement, and the skirts do not normally discharge to the ground.

Referring to fig. 5, further, the flange 103 has a square structure.

Referring to fig. 5, further, the corners of the flange 103 are provided with chamfers.

In the present embodiment, the safety is effectively improved by providing the chamfer.

Specifically, the working principle and the using process of the utility model are as follows:

as shown in fig. 4, the casting cylinder 101 is installed on the side plate of the high-voltage cabinet 4 by passing a fastener through the flange hole 104 of the flange 103 and extending into the high-voltage cabinet 4, the bus 5 passes through the middle of the through hole 105 of the casting cylinder 101, the installation of the insulating resin casting body 1 is completed, the secondary terminal 405 is connected into an external arc protection detection device, when current flows through the bus 5, the corresponding leakage current can be detected, and if the leakage current reaches an alarm, the arc 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.

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, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will 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 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

1. The wall bushing with the leakage current sensor is characterized by comprising an insulating resin casting body (1), a first leakage current sensor (2) and a second leakage current sensor (3), wherein the insulating resin casting body (1) comprises a casting cylinder body (101), a skirt edge (102) and a flange (103), the skirt edge (102) is arranged on the casting cylinder body (101), the flange (103) is arranged at the center of the casting cylinder body (101), the first leakage current sensor (2) and the second leakage current sensor (3) respectively comprise an iron core (401), a secondary winding (402), a secondary lead (403), a terminal insert (404) and a secondary terminal (405), the secondary winding (402) is wound on the outer surface of the iron core (401), and the secondary winding (402) is connected with the terminal insert (404) through the secondary lead (403), the terminal insert (404) is provided with an internal thread hole, the outer surface of one end of the secondary terminal (405) is provided with an external thread, the terminal insert (404) is in threaded connection with the secondary terminal (405), the middle of the pouring cylinder (101) is provided with a through hole (105), and a bus (5) penetrates through the through hole (105).

2. A wall bushing with a leakage current sensor according to claim 1, characterized in that the core (401), the secondary winding (402), the secondary lead (403) and the terminal insert (404) are sealed in an insulating resin casting (1).

3. The wall bushing with the leakage current sensor according to claim 1, wherein flange holes (104) are formed in the periphery of each flange (103), and the four flange holes (104) are arranged symmetrically and equidistantly.

4. The wall bushing with the leakage current sensor as claimed in claim 1, wherein the skirt (102) is provided in a plurality and is distributed equidistantly.

5. A wall bushing with a leakage current sensor according to claim 1, characterized in that the flange (103) has a square configuration.

6. A wall bushing with a leakage current sensor according to claim 1, characterized in that the flange (103) is chamfered at its corners.