Handcart type PT cabinet high-voltage switch equipment with cable inlet wire

Abstract

The utility model discloses handcart type PT cabinet high-voltage switch equipment with a cable inlet wire, and belongs to the technical field of high-voltage electrical equipment. The equipment comprises a circuit breaker chamber, a main bus chamber, a cable chamber and a voltage transformer chamber, a fusing lightning arrester handcart is arranged in the circuit breaker; one end of the fusing lightning arrester handcart is connected with a voltage transformer in the voltage transformer chamber, and the other end of the fusing lightning arrester handcart is connected with a branch bus in the main bus chamber; the branch bus is connected with a wire inlet side bus in the cable chamber; a middle partition plate is arranged between the cable chamber and the voltage transformer chamber; a pressure relief cover is arranged on the middle partition plate. According to the utility model, through improving the installation layout in the cabinet, separating the cable chamber and increasing the pressure release channel, the equipment structure is compact, the equipment operation is flexible, and the maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrical equipment, in particular to a trolley-type PT cabinet with cable inlet high-voltage switchgear. Background Art

[0002] At present, the 12kV busbar equipment cabinet solution widely used in the industry faces many challenges in responding to the diverse needs of users. Especially when the PT cabinet is required to be connected to the busbar externally, the traditional connection method between the two sections of the busbar, such as the busbar bridge or the insulated tube busbar connection, although it meets the basic power transmission needs to a certain extent, these solutions have exposed some significant shortcomings in actual operation.

[0003] First, although the busbar bridge connection method has a stable structure, its installation and maintenance process is relatively complicated, requiring a large space, which is not conducive to the compact layout of the equipment. At the same time, the design of the busbar bridge often fails to take into account the independence of the compartment and the protection level requirements, which increases the safety hazards to a certain extent. Secondly, although the insulated tubular busbar connection method has good insulation performance and current carrying capacity, its cost is relatively high, which increases the manufacturing cost of the equipment cabinet. In addition, the installation and commissioning process of the insulated tubular busbar is also cumbersome, requiring a high level of skill for the operator. More importantly, the existing busbar equipment cabinet solution has obvious deficiencies in compartment pressure relief and live maintenance. Due to the insufficient sealing between the compartments, once a fault occurs, it may cause the propagation of pressure waves, causing damage to the equipment cabinet and the surrounding environment. At the same time, the feasibility of live maintenance is limited, and it cannot meet the requirements of the State Grid's special solution for equipment reliability and safety. Utility Model Content

[0004] Aiming at the problem that the PT cabinet in the prior art occupies a large space and it is difficult to take into account the independence and protection level requirements of the compartment, resulting in obvious deficiencies in compartment pressure relief and live maintenance, the utility model provides a trolley-type PT cabinet with cable inlet high-voltage switchgear, which realizes a compact equipment structure by improving the installation layout in the cabinet, separating the cable room, and adding a pressure relief channel, making the equipment flexible to operate and convenient to maintain.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0006] A trolley-type PT cabinet with cable incoming high-voltage switchgear comprises a circuit breaker room, a main bus room, a cable room and a voltage transformer room; a fuse arrester trolley is arranged in the circuit breaker room; one end of the fuse arrester trolley is connected to the voltage transformer in the voltage transformer room, and the other end of the fuse arrester trolley is connected to the branch bus in the main bus room; the branch bus is connected to the incoming bus in the cable room; an intermediate partition is arranged between the cable room and the voltage transformer room; a pressure relief cover is arranged on the intermediate partition.

[0007] Furthermore, a fuse is provided on the fuse arrester trolley.

[0008] Furthermore, the fuse includes a high-voltage fuse and a zinc oxide arrester.

[0009] Furthermore, a first sensor is provided between the fuse arrester trolley and the voltage transformer.

[0010] Furthermore, a contact box is provided between the fuse arrester trolley and the branch busbar.

[0011] Furthermore, the branch bus is connected to the incoming line side bus through a bus bushing.

[0012] Furthermore, a second sensor is provided on the branch bus and the incoming line side bus.

[0013] Furthermore, the incoming line side busbar is also connected to the incoming line cable.

[0014] Furthermore, the circuit breaker room, main bus room, cable room and voltage transformer room are located in the cabinet.

[0015] Furthermore, an instrument room is also provided in the cabinet.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model reduces the overall space occupied by the PT cabinet by improving the installation layout in the cabinet, making the equipment more compact. This not only helps to save installation space, but also makes the layout of the entire power system more reasonable and efficient. Space optimization does not sacrifice equipment performance. Instead, through a more scientific layout design, a higher space utilization rate is achieved, thereby improving the integration and operation efficiency of the entire system. Secondly, the utility model enhances the independence between the compartments by separating the cable room. This helps to reduce the mutual influence between different compartments and improve the safety and stability of the equipment. At the same time, the separation design also helps to improve the protection level of each compartment, so that the equipment can better resist adverse factors in the external environment, such as dust, moisture, etc. Finally, the utility model adds a pressure relief channel between the cable room and the voltage transformer room. In high-voltage equipment, once a fault or abnormal situation occurs, a fast and effective pressure relief mechanism is essential to ensure personnel safety and equipment integrity. By reasonably designing the pressure relief channel, the utility model can quickly release the pressure in the cabinet in an emergency, reduce the probability of risks such as explosion, and thus significantly improve the safety of the equipment. Therefore, the design of the utility model makes the equipment operation more flexible. The trolley design allows operators to easily replace and maintain components without disassembling the entire equipment. At the same time, the optimized layout and partition design also make maintenance work more convenient. Maintenance personnel can understand the internal structure of the equipment more clearly and quickly locate and solve problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0019] Figure 1 This is a structural schematic diagram of a trolley-type PT cabinet with cable inlet high-voltage switchgear of the utility model;

[0020] Figure 2 This is a schematic diagram of the position of a pressure relief cover of a trolley-type PT cabinet with a cable incoming high-voltage switchgear of the utility model.

[0021] In the figure, 1 is a cabinet; 2 is a fuse arrester trolley; 3 is a contact box; 4 is a branch bus; 5 is an incoming bus; 61 is a first sensor; 62 is a second sensor; 71 is a first bus bushing; 72 is a second bus bushing; 8 is a voltage transformer; 9 is an incoming cable; 10 is a high-voltage fuse; 11 is a zinc oxide arrester; 12 is a middle partition; 13 is a pressure relief cover; 21 is an instrument room; 22 is a circuit breaker room; 23 is a main bus room; 24 is a cable room; 25 is a voltage transformer room. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be described clearly and completely below in conjunction with the drawings of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present invention.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Aiming at the problem that the PT cabinet in the prior art occupies a large space, it is difficult to take into account the independence and protection level requirements of the compartment, resulting in obvious deficiencies in compartment pressure relief and live maintenance, the utility model provides a trolley-type PT cabinet with cable inlet high-voltage switchgear.

[0026] like Figure 1 As shown, the utility model is a trolley-type PT cabinet with cable incoming high-voltage switchgear, which includes an instrument room 21, a circuit breaker room 22, a main bus room 23, a cable room 24 and a voltage transformer room 25.

[0027] An instrument room 21 , a circuit breaker room 22 , a main bus room 23 , a cable room 24 and a voltage transformer room 25 are installed in the cabinet 1 .

[0028] By receiving signals from electrical equipment, the instrument room 21 can monitor the status of electrical equipment in real time, such as temperature, humidity, voltage, current, power, etc., and promptly detect and handle faults. At the same time, it can also analyze and process the operating data of electrical equipment, such as power, power factor, etc., to provide a decision-making basis for the optimization and improvement of the electrical system. In addition, the instrument room 21 can also transmit data and information to the monitoring center or other devices to facilitate monitoring and analysis and improve the intelligence level of the electrical system.

[0029] The bottom areas of the cable chamber 24 and the voltage transformer chamber 25 are connected to the bottom area of ​​the cabinet 1 .

[0030] An instrument room 21 and a circuit breaker room 22 are arranged above the voltage transformer room 25 . The upper areas of the instrument room 21 and the circuit breaker room 22 are arranged together, and the bottom of the circuit breaker room 22 and the top of the voltage transformer room 25 are arranged together.

[0031] The main busbar chamber 23 is located above the voltage transformer chamber 25 and is connected to the cable chamber 24 .

[0032] The circuit breaker chamber 22 is provided with a fuse arrester trolley 2 , a high-voltage fuse 10 and a zinc oxide arrester 11 .

[0033] The fuse arrester trolley 2 is provided with a fuse, which includes a high-voltage fuse 10 and a zinc oxide arrester 11 .

[0034] When an overload or short-circuit current occurs in the circuit, the high-voltage fuse 10 in the fuse arrester trolley 2 will blow the fuse, cut off the circuit, and prevent equipment damage. When the system is subjected to overvoltage such as lightning, the zinc oxide lightning arrester 11 in the fuse arrester trolley 2 can guide the overvoltage to the ground to protect electrical equipment from damage by overvoltage. Therefore, the fuse arrester trolley 2 provides a double guarantee for the stable operation of the power system by combining the functions of the high-voltage fuse 10 and the zinc oxide lightning arrester 11.

[0035] One end of the fuse arrester trolley 2 is connected to the voltage transformer 8 in the voltage transformer chamber 25. In addition, a first sensor 61 is provided between the fuse arrester trolley 2 and the voltage transformer 8.

[0036] The fuse arrester trolley 2 is connected to the voltage transformer 8 to achieve the measurement and protection of current and voltage. The voltage transformer 8 can convert high voltage into low voltage, so that the measuring instrument and the protection device can work within a safe voltage range. The fuse arrester trolley 2 provides a protection function for the circuit. When an abnormality occurs in the circuit, such as overload, short circuit or lightning overvoltage, the fuse arrester trolley 2 can quickly cut off the circuit to avoid damage to the voltage transformer and other power equipment.

[0037] The first sensor 61 provided between the fuse arrester trolley 2 and the voltage transformer 8 plays a role in real-time monitoring and data transmission. The first sensor 61 can detect the current, voltage or other relevant parameters in the circuit, and transmit these data to the monitoring system of the power system in real time. By analyzing these data, the power system operation and maintenance personnel can understand the operating status of the circuit, discover potential faults or hidden dangers in time, and take corresponding measures to deal with them.

[0038] The other end of the fuse arrester trolley 2 is connected to the branch bus 4 in the main bus chamber 23 through the contact box 3, and the branch bus 4 is connected to the incoming bus 5 in the cable chamber 24 through the bus bushing, and the incoming bus 5 is connected to the incoming cable 9. The second sensor 62 is provided on the incoming bus 5 and the branch bus 4.

[0039] The busbar bushing includes a first busbar bushing 71 and a second busbar bushing 72 . The branch busbar 4 is connected to the incoming busbar 5 in the cable chamber 24 through the first busbar bushing 71 , and the branch busbar 4 is connected to the main busbar through the second busbar bushing 72 .

[0040] A middle partition 12 is provided at the connection between the cable chamber 24 and the voltage transformer chamber 25. Figure 2 As shown, a pressure relief cover 13 is provided on the middle partition plate 12 .

[0041] The main function of the pressure relief cover 13 is to allow the gas or pressure to be quickly discharged from the pressure relief port when a failure occurs in the internal equipment of the voltage transformer room 25, such as an explosion or a large amount of gas is generated, thereby protecting other equipment and personnel in the room from damage.

[0042] Specifically, when an abnormal situation occurs in the voltage transformer room 25, such as equipment overheating, short circuit or explosion, a large amount of gas and pressure will be generated. If there is no appropriate pressure relief mechanism, these gases and pressures may accumulate indoors, causing equipment damage, structural damage, and may even cause more serious safety accidents. With the pressure relief cover 13, when the indoor pressure reaches a certain level, the pressure relief cover 13 can open automatically, allowing the gas and pressure to be discharged quickly. In this way, not only can equipment damage and structural damage be avoided, but also the threat of accidents to personnel safety can be reduced. At the same time, the design of the pressure relief cover 13 also takes into account sealing and durability to ensure that during normal operation, it can effectively prevent external impurities such as dust and moisture from entering the room, thereby protecting the equipment in the voltage transformer room 25 from the influence of the external environment.

[0043] The cabinet body 1 in the utility model is made of high-quality aluminum-zinc coated steel plate, adopts a bending assembly structure, and the plate is processed by CNC equipment to ensure its material accuracy, thereby achieving high precision of the cabinet body, and the cabinet body size can be set according to actual conditions.

[0044] In summary, the utility model improves the internal installation layout of the cabinet 1, and on the basis of keeping the original compartment of the switch cabinet unchanged, makes full use of the mechanical properties of the original equipment, utilizes the structure of the PT installation, separates the cable room, increases the pressure relief channel, and relieves pressure from the top of the cabinet through the cable room. The structural improvement investment cost of this scheme is small, and it can meet the needs of the special scheme of the State Grid. Through the optimized design of the structure of the State Grid standardized switch cabinet, the equipment structure is compact, the compartment layout is reasonable, the equipment operation is flexible, the maintenance is convenient, and the five-protection locking function is perfect; the utility model can meet the protection level of the armored trolley type high-voltage cabinet shell IP4X, and the protection level between the compartments in the cabinet IP2X.

[0045] The utility model not only improves the performance and safety of the equipment, but also reduces the cost of maintenance and overhaul. By optimizing the design and enhancing the functions, it provides strong support for the stable operation of the power system. The utility model's trolley-type PT cabinet with cable inlet high-voltage switchgear achieves the compactness of the equipment structure, the flexibility of operation and the convenience of overhaul by improving the installation layout in the cabinet, separating the cable room, and adding the pressure relief channel. These improvements not only improve the overall performance and safety of the equipment, but also reduce the maintenance cost, providing an important guarantee for the stable operation of the power system.

[0046] The utility model discloses an operation sequence of a handcart type PT cabinet with a cable incoming high voltage switchgear.

[0047] Power supply operation sequence:

[0048] When the rear door of the switch cabinet of the utility model is closed and then the front door is closed, the front and rear doors are electrically locked through sensors, and the fuse arrester trolley 2 is moved from the test position to the working position to perform power supply and closing operations.

[0049] Power outage operation sequence:

[0050] First disconnect the circuit breaker on the main bus side, then return the circuit breaker on the main bus side from the working position to the test position, withdraw the fuse arrester trolley 2, push the main bus grounding trolley, disconnect the electromagnetic locks of the front and rear doors, open the rear door to inspect the main transformer side, and open the front door to inspect the line side.

[0051] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed utility model subject matter.

[0052] The above content is a further detailed description of the utility model. It cannot be determined that the specific implementation methods of the utility model are limited to these. For ordinary technicians in the technical field to which the utility model belongs, they can make some simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as belonging to the protection scope of the utility model determined by the submitted claims.

Claims

1. A trolley-type PT cabinet with cable inlet high-voltage switchgear, characterized in that: It includes a circuit breaker room (22), a main bus room (23), a cable room (24) and a voltage transformer room (25); A fuse arrester trolley (2) is arranged in the circuit breaker chamber (22); One end of the fuse arrester trolley (2) is connected to the voltage transformer (8) in the voltage transformer room (25), and the other end of the fuse arrester trolley (2) is connected to the branch bus (4) in the main bus room (23); The branch busbar (4) is connected to the incoming line side busbar (5) in the cable chamber (24); An intermediate partition (12) is provided between the cable chamber (24) and the voltage transformer chamber (25); A pressure relief cover (13) is provided on the middle partition (12).

2. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: The fuse arrester trolley (2) is provided with a fuse.

3. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 2, characterized in that: The fuse comprises a high-voltage fuse (10) and a zinc oxide arrester (11).

4. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: A first sensor (61) is provided between the fuse arrester trolley (2) and the voltage transformer (8).

5. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: A contact box (3) is provided between the fuse arrester trolley (2) and the branch busbar (4).

6. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: The branch busbar (4) is connected to the incoming line side busbar (5) via a busbar bushing.

7. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: A second sensor (62) is provided on the branch busbar (4) and the incoming line side busbar (5).

8. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: The incoming line side busbar (5) is also connected to the incoming line cable (9).

9. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 1, characterized in that: The circuit breaker chamber (22), the main bus chamber (23), the cable chamber (24) and the voltage transformer chamber (25) are located in the cabinet (1).

10. A trolley-type PT cabinet with cable inlet high-voltage switchgear according to claim 9, characterized in that: An instrument room (21) is also provided in the cabinet (1).

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