Multipurpose current transformer, high-voltage detection system and high-voltage switch cabinet

Abstract

The utility model discloses a multipurpose current transformer, a high-voltage detection system and a high-voltage switch cabinet, and relates to the technical field of voltage detection, the multipurpose current transformer comprises a casting body and a current transformer module arranged in the casting body; and the electrified display sensor module is integrally mounted in the pouring body and is electrically connected with the current transformer module. According to the utility model, the problems of large occupied and wasted space and insufficient utilization of space resources of a high-voltage switch cabinet due to respective arrangement of the current transformer and the sensor in the prior art are solved, and the electrified display sensor module and the current transformer module are integrated together, so that the current transformer module keeps the original metering protection function and also keeps the safety of the high-voltage switch cabinet. The current transformer and the live display sensor are arranged on the high-voltage switch cabinet, the live display function is achieved, the space in the high-voltage switch cabinet is saved, the current transformer and the live display sensor need to be installed on the high-voltage switch cabinet and connected together in a wired mode in the prior art, the installation step of the live display sensor is omitted, the workload of operators is relieved, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of voltage detection technology, specifically to a multi-purpose current transformer, a high-voltage detection system, and a high-voltage switchgear. Background Technology

[0002] In high-voltage switchgear, three current transformers and three sets of corresponding live-indicating sensors are typically installed to measure three-phase power (a common power supply in industry). Currently, in high-voltage switchgear, the current transformers and their corresponding sensors are installed separately and arranged vertically. However, due to the high voltage, the three current transformers need to be spaced apart to prevent short circuits. Therefore, the three sets of live-indicating sensors also need to be spaced apart. This arrangement occupies and wastes a significant amount of space in the high-voltage switchgear, failing to fully utilize the space resources within the switchgear and hindering the placement of other components. Utility Model Content

[0003] The technical problem to be solved by this utility model is that the existing current transformers and sensors are set up separately, which occupies and wastes a lot of space and does not make full use of the space resources of high-voltage switchgear. The purpose is to provide a current transformer for high-voltage switchgear to solve the problem of the existing current transformers and sensors occupying and wasting a lot of space and not making full use of the space resources of high-voltage switchgear.

[0004] This utility model is achieved through the following technical solution:

[0005] A current transformer for high-voltage switchgear includes:

[0006] Casting body,

[0007] The current transformer module is installed inside the casting.

[0008] The live display sensor module is integrated and installed in the casting body and is electrically connected to the current transformer module.

[0009] Further optimization involves the current transformer module comprising a high-voltage copper busbar, a primary winding, and a secondary winding that are electrically connected in sequence and located inside the casting body. The high-voltage copper busbar is electrically connected to the live display sensor module.

[0010] Further optimization involves the inclusion of a resistor disposed inside the casting body, with the high-voltage end of the resistor connected to a high-voltage copper busbar for electrical connection.

[0011] Further optimization involves providing a sensor output port on the casting body, with the signal terminal of the resistor led to the sensor output port for output.

[0012] Further optimization involves connecting a powered display to the sensor output port.

[0013] Further optimization involves providing an installation component at the bottom of the casting body.

[0014] Further optimization involves providing multiple lead-out nuts on the casting body.

[0015] Further optimization involves using an insulating material for the casting.

[0016] This utility model also provides another technical solution, a high voltage detection system, including a multi-purpose current transformer as described in any one of claims 1-8, wherein the multi-purpose current transformer is provided in three sets.

[0017] This utility model also provides another technical solution, a high-voltage switchgear, including the high-voltage detection system as described in claim 9, for measuring three-phase force and conducting live tests.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] 1. Integrating the live display sensor module with the current transformer module allows the current transformer module to retain its original metering and protection functions while also having a live display function, saving space in the high-voltage switchgear and reducing heat generation.

[0020] 2. Existing technology requires the current transformer and the live display sensor to be installed separately on the high-voltage switchgear and wired together. This solution omits the installation step of the live display sensor, reducing the workload of operators and saving costs. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram showing the connection relationship between the current transformer module and the live display sensor module of this utility model;

[0025] The attached diagram shows the markings and corresponding component names:

[0026] 1- Casting body, 2- Current transformer module, 21- High voltage copper busbar, 22- First and second windings, 23- Second and second windings, 24- Primary winding, 3- Live display sensor module, 31- Resistor, 4- Sensor output port, 5- Mounting assembly, 6- Outlet nut. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0028] In existing high-voltage switchgear, three current transformers and three sets of corresponding live display sensors are usually required to measure three-phase power (a common power supply in industry). However, due to the high voltage, the three current transformers need to be spaced apart to prevent short circuits. Therefore, the three sets of live display sensors also need to be spaced apart. Such a setup will occupy and waste a large amount of space in the high-voltage switchgear, making it impossible to make full use of the space resources inside the high-voltage switchgear, which is not conducive to the placement of other components.

[0029] To address the aforementioned problems, this embodiment 1 provides a current transformer for high-voltage switchgear, such as... Figures 1-3 As shown, it includes:

[0030] Casting body 1 is a cylindrical structure with a pleated structure on the outer wall. The pleated structure can increase the creepage distance of the current transformer, thereby improving the current transformer's ability to adapt to harsh environments.

[0031] Furthermore, the casting body 1 is made of insulating material to ensure overall safety.

[0032] The current transformer module 2 is disposed inside the casting body 1. The current transformer module 2 includes a high-voltage copper busbar 21, a primary winding 24 and a secondary winding that are electrically connected in sequence and located inside the casting body 1, wherein the secondary winding includes a first secondary winding 22 and a second secondary winding 23.

[0033] The high-voltage copper busbar 21 is electrically connected to the live display sensor module 3. The high-voltage copper busbar 21 is located at the top of the casting body 1 and is made of T3 copper, thus providing a large contact area for connecting the high-voltage circuit, thereby ensuring the quality and accuracy of the transformer.

[0034] The live display sensor module 3 is integrated and installed inside the casting body 1. In this embodiment, the live display sensor module 3 is sealed inside the casting body 1 by casting and is electrically connected to the current transformer module 2. The live display sensor module 3 includes a resistor 31 disposed inside the casting body 1. In this embodiment, three resistors 31 are provided and the three resistors 31 are connected in series. The signal terminal of one of the resistors 31 is led to the high voltage copper busbar 21 for electrical connection.

[0035] The specific operation of this embodiment is as follows: the current transformer module 2 and the live display sensor module 3 are placed in the same housing, then cast and molded, and the housing is removed after molding to obtain a current transformer with a live display sensor integrated.

[0036] By integrating the current transformer module 2 and the live-line display sensor module 3, the current transformer module 2 retains its original metering and protection functions while also providing live-line display functionality, thus saving space within the high-voltage switchgear. Furthermore, existing technologies require the current transformer and the live-line display sensor to be installed separately on the high-voltage switchgear and wired together. This solution eliminates the installation step of the live-line display sensor, reduces the length and complexity of the wiring between the live-line display sensor and the current transformer, alleviates the workload of operators, and saves costs.

[0037] Furthermore, such as Figure 3 As shown, the live display sensor module 3 includes a resistor 31 disposed inside the casting body 1. The terminals of the resistor 31 are led to the high-voltage copper busbar 21 for electrical connection. Additionally, the casting body 1 is provided with a sensor output port 4, and the terminals of the resistor 31 are led to the sensor output port 4. In this embodiment, the resistor 31 is connected to the existing wiring of the current transformer, ensuring the original function while enabling the current transformer module 2 to have a live display function.

[0038] Furthermore, the sensor output port 4 is externally connected to a live display. Specifically, the live display is connected to the sensor output port 4 to visually indicate whether the current transformer has an operating voltage and whether it has a live display function.

[0039] Furthermore, an installation component 5 is provided at the bottom of the casting body 1. Specifically, the installation component 5 is integrally formed with the casting body. The operation process is as follows: before casting, 4-5 installation nuts are pre-set at the bottom of the shell. After casting, the casting body and the installation nuts are integrally cast. On the one hand, the installation nuts are stably connected to the bottom of the casting body, avoiding the situation where there are many installation nuts and they are small and easily lost. In use, the installation nuts are used in conjunction with bolts to effectively connect and fix the position of the current transformer in the high-voltage switchgear. This connection method is not only firm and reliable, but also easy to disassemble and reinstall, providing convenience for equipment assembly and maintenance. In addition, the nuts are equipped with shock-absorbing pads, thereby reducing the impact of vibration on the equipment.

[0040] Furthermore, the casting body 1 is provided with multiple lead-out nuts 6.

[0041] In this embodiment, four lead-out nuts 6 are provided, one for the first secondary winding 22 and the other for the second secondary winding 23, to facilitate subsequent wiring operations. The lead-out nuts 6 are also used to fix and connect electrical equipment such as cables and wires. Through a tight threaded connection, the lead-out nuts 6 can firmly fix the various components together, thereby ensuring the normal operation of the electrical equipment. It is also known that the use of lead-out nuts 6 can improve the safety performance of the equipment. It can effectively prevent safety hazards such as leakage caused by loose connections, thereby protecting the safety of personnel and equipment.

[0042] This utility model also provides another technical solution: a high-voltage detection system, including three sets of multi-purpose current transformers. Specifically, the three sets of multi-purpose current transformers are used to measure three-phase electricity.

[0043] This utility model also provides another technical solution: a high-voltage switchgear, including a high-voltage detection system for measuring three-phase force.

[0044] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-purpose current transformer, characterized in that, include: Casting body, The current transformer module is installed inside the casting. The live display sensor module is integrated and installed in the casting body and is electrically connected to the current transformer module.

2. The multi-purpose current transformer according to claim 1, characterized in that, The current transformer module includes a high-voltage copper busbar, a primary winding, and a secondary winding that are electrically connected in sequence and located inside the casting body. The high-voltage copper busbar is electrically connected to the live display sensor module.

3. The multi-purpose current transformer according to claim 2, characterized in that, The charged display sensor module includes a resistor disposed inside the casting body, and the high-voltage end of the resistor is led to a high-voltage copper busbar for electrical connection.

4. The multi-purpose current transformer according to claim 1, characterized in that, The casting body is provided with a sensor output port, and the signal terminal of the resistor is led to the sensor output port for output.

5. The multi-purpose current transformer according to claim 1, characterized in that, The sensor output port is externally connected to a powered display.

6. The multi-purpose current transformer according to claim 1, characterized in that, An installation component is provided at the bottom of the casting body.

7. The multi-purpose current transformer according to claim 1, characterized in that, The casting body is provided with multiple lead-out nuts.

8. The multi-purpose current transformer according to claim 1, characterized in that, The casting body is made of insulating material.

9. A high-voltage detection system, characterized in that, Includes the multi-purpose current transformer as described in any one of claims 1-8, wherein the multi-purpose current transformer is provided in three sets.

10. A high-voltage switchgear, characterized in that, The system includes the high-voltage detection system as described in claim 9, used for measuring three-phase force and conducting live tests.

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