Main transformer incoming line switch

Abstract

According to the technical scheme, the main transformer incoming line switch is characterized in that the main transformer incoming line switch comprises a switch cabinet body, an instrument chamber, a handcart chamber, a branch line chamber, a small bus chamber, a cable chamber and a grounding chamber are arranged in the switch cabinet body, and a breaker is fixedly installed on a handcart of the handcart chamber; the electrical layout that the air clear distance is larger than or equal to 160 mm is kept between the devices in the switch cabinet body, the main bus adopts the TMY-3 (120 * 10) specification, the rated current can reach 4000 A, the branch lines adopt the TMY-4 (100 * 10) specification, and the air clear distance is larger than or equal to mm through the electrical layout that the air clear distance is larger than or equal to 160 mm between the devices in the switch cabinet body. The short circuit or discharge phenomenon possibly caused by too small electrical clearance is effectively prevented, the electrical safety performance of equipment is remarkably improved, the main bus adopts the TMY-3 (120X10) specification, the rated current can reach 4000 A, it is ensured that the main bus can bear large current, the requirement for high-load operation is met, meanwhile, the specification and quality of bus materials are ensured, and the production cost is reduced. And the reliability and the stability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, and in particular to a main transformer incoming line switch. Background Art

[0002] The important role that electricity plays in our lives and production cannot be ignored. It brings us great convenience and becomes an important energy source in our production and life. The most critical factor for the normal operation and transmission of electricity in a power plant is electrical equipment. Switchgear, as the main equipment for controlling the opening and closing of various equipment, is an important member of electrical equipment.

[0003] Switchgear (also known as complete switch or complete distribution device) is an electrical equipment mainly composed of circuit breakers. It means that the manufacturer assembles relevant high and low voltage electrical appliances (including control electrical appliances, protective electrical appliances, measuring electrical appliances) as well as busbars, current-carrying conductors, insulators, etc. in a closed or open metal cabinet according to the requirements of the primary electrical wiring diagram. It is a device for receiving and distributing electrical energy in the power system. It is called a metal switch device, or switchgear for short.

[0004] With the rapid development of the power industry, especially in high-altitude areas, the demand for power grid construction is growing. In the plateau environment of 3,000 meters above sea level and above, the operation of switchgear is prone to short circuit and discharge of electrical equipment, and the influence of high-voltage environment cannot meet the needs of high-load operation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a main transformer incoming line switch, which solves the problem that the operation of the switch cabinet is prone to short circuit and discharge of electrical equipment in a plateau environment at an altitude of 3,000 meters or above, and the problem that the demand for high-load operation cannot be met due to the influence of the high-voltage environment.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A main transformer incoming line switch, comprising: a switch cabinet body, the switch cabinet body is a 1000mm wide KYN28A-12 (G) main transformer incoming line switch cabinet, the switch cabinet body is provided with an instrument room, a trolley room, a branch line room, a small bus room, a cable room and a grounding room, a circuit breaker is fixedly installed on the trolley in the trolley room, the incoming line end of the circuit breaker extends to the inside of the cable room, the outgoing line end of the circuit breaker extends to the inside of the branch line room, two current transformers are fixedly installed in the cable room, the main bus is laid in the current transformer, and the main bus is fixedly installed in the Inside the current transformer, a branch line is laid inside the branch room, and several wall sleeves are arranged inside the branch room. Two insulating support columns are fixedly installed on one side, and the wall sleeve is fixedly installed inside the branch room through the insulating support column. The branch line is sleeved inside the wall sleeve. The electrical layout maintains an air clearance ≥160mm between the equipment inside the switch cabinet body. The main bus adopts TMY-3 (120X10) specifications, and the rated current can reach 4000A. The branch line adopts TMY-4 (100X10) specifications.

[0008] By adopting the above technical solution and maintaining an electrical layout with an air clearance of ≥mm between the devices inside the switch cabinet body, short circuit or discharge caused by too small electrical clearance can be effectively prevented, and the electrical safety performance of the equipment can be significantly improved. By adopting TMY-3 (120X10) specifications for the main busbar and a rated current of up to 4000A, it is ensured that the main busbar can carry large currents and meet the needs of high-load operation. At the same time, the specifications and quality of the busbar materials are guaranteed to improve the reliability and stability of the equipment.

[0009] Preferably, a control instrument is fixedly installed inside the instrument room, and the control instrument is electrically connected to the current transformer and the circuit breaker.

[0010] By adopting the above technical solution, current transformers are set up to monitor power system parameters in real time. Once an abnormal situation is detected, the circuit can be quickly cut off by the circuit breaker to achieve protection functions and improve the automation level and operation efficiency of the equipment.

[0011] Preferably, the switch cabinet body is made of high-strength insulating material.

[0012] By adopting the above technical solution, by making the switch cabinet body with high-strength insulating material, the insulation performance of the switch cabinet is enhanced, and the electrical safety performance of the equipment is improved, especially in plateau environments, it can effectively resist the influence of severe climatic conditions on the insulation performance of the equipment.

[0013] Preferably, the grounding terminal of the circuit breaker is connected to a grounding device, and the grounding device is grounded to the ground.

[0014] By adopting the above technical solution and setting up a grounding device, it is ensured that the equipment can quickly conduct current to the ground in the event of a fault, thereby protecting the safety of personnel and equipment and preventing electrical accidents.

[0015] Preferably, contacts are fixedly mounted on the incoming terminal, the outgoing terminal and the grounding terminal of the circuit breaker.

[0016] By adopting the above technical solution and setting contacts, the reliability and stability of current transmission are guaranteed, while providing reliable electrical connection to ensure the normal operation of the equipment.

[0017] Preferably, a lightning arrester is fixedly installed on the inner bottom surface of the cable chamber, and the lightning arrester is electrically connected to the main bus and the grounding device.

[0018] By adopting the above technical solution and installing lightning arresters, necessary lightning protection can be provided under severe weather conditions such as lightning to prevent damage to equipment by lightning waves and ensure the safe operation of the power system.

[0019] Preferably, the trolley room and the branch line room are both provided with a heat dissipation chamber, and a plurality of radiators are provided inside the heat dissipation chamber.

[0020] By adopting the above technical solution and setting a radiator, the heat dissipation performance of the equipment during high-load operation can be ensured, damage or malfunction caused by overheating of the equipment can be prevented, and the reliability and service life of the equipment can be improved.

[0021] Preferably, the main busbar and the branch line are fixed inside the switch cabinet body through insulators.

[0022] By adopting the above technical solution and setting insulators, the stable operation of the busbar system is guaranteed, while necessary electrical insulation protection is provided to prevent the occurrence of electrical faults.

[0023] In summary, the present invention mainly has the following beneficial effects:

[0024] By maintaining an electrical layout with an air clearance of ≥160mm between the devices inside the switch cabinet body, short circuit or discharge caused by too small electrical clearance is effectively prevented, significantly improving the electrical safety performance of the equipment. By adopting TMY-3 (120X10) specifications for the main busbar with a rated current of up to 4000A, it is ensured that the main busbar can carry large currents and meet the needs of high-load operation. At the same time, the specifications and quality of the busbar materials are guaranteed to improve the reliability and stability of the equipment.

[0025] By setting up current transformers, the power system parameters can be monitored in real time. Once an abnormal situation is detected, the circuit can be quickly cut off by the circuit breaker to achieve the protection function, improve the automation level and operation efficiency of the equipment, and make the main body of the switch cabinet made of high-strength insulating materials to enhance the insulation performance of the switch cabinet and improve the electrical safety performance of the equipment. Especially in plateau environments, it can effectively resist the influence of severe climatic conditions on the insulation performance of the equipment. By setting up grounding devices, it is ensured that the equipment can quickly conduct current to the ground in a fault state to protect the safety of personnel and equipment and prevent electrical accidents. By setting up contacts, the reliability and stability of current transmission are guaranteed, and reliable electrical connections are provided to ensure the normal operation of the equipment. By setting up lightning arresters, necessary lightning protection is provided under severe weather conditions such as lightning to prevent damage to the equipment by lightning waves and ensure the safe operation of the power system. By setting up radiators, the heat dissipation performance of the equipment during high-load operation is ensured to prevent damage or failure caused by overheating of the equipment and improve the reliability and service life of the equipment. By setting insulators, the stable operation of the busbar system is guaranteed, and necessary electrical insulation protection is provided to prevent electrical failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the internal structure of the switch cabinet body of the present invention;

[0028] Figure 3 It is a schematic diagram of the circuit breaker structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the wall sleeve of the present invention.

[0030] Figure numerals: 1. Switch cabinet body; 2. Instrument room; 3. Cart room; 4. Branch line room; 5. Circuit breaker; 6. Current transformer; 7. Main bus; 8. Branch line; 9. Wall sleeve; 10. Lightning arrester; 11. Grounding device; 12. Heat dissipation room; 13. Radiator; 14. Insulator; 15. Contact; 16. Insulating support column; 17. Small bus room; 18. Cable room; 19. Grounding room; 20. Control instrument. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, 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 this field without creative work are within the scope of protection of the present invention.

[0032] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A main transformer incoming line switch comprises a switch cabinet body 1, the switch cabinet body 1 is a KYN28A-12 (G) main transformer incoming line switch cabinet with a width of 1000 mm, an instrument room 2, a trolley room 3, a branch room 4, a small bus room 17, a cable room 18 and a grounding room 19 are arranged inside the switch cabinet body 1, a circuit breaker 5 is fixedly installed on the trolley in the trolley room 3, the incoming line end of the circuit breaker 5 extends to the inside of the cable room 18, the outgoing line end of the circuit breaker 5 extends to the inside of the branch room 4, two current transformers 6 are fixedly installed inside the cable room 18, a main bus 7 is laid inside the current transformer 6, the main bus 7 is fixedly installed inside the current transformer 6, a branch line 8 is laid inside the branch room 4, a plurality of wall sleeves 9 are arranged inside the branch room 4, two insulating support columns 16 are fixedly installed on one side of the 9, and the wall sleeves 9 It is fixedly installed inside the branch room 4 through the insulating support column 16, and the branch line 8 is sleeved inside the wall sleeve 9. The electrical layout maintains an air clearance of ≥160mm between the equipment inside the switch cabinet body 1. The main bus 7 adopts the TMY-3 (120X10) specification, and the rated current can reach 4000A. The branch line 8 adopts the TMY-4 (100X10) specification. When in use, the main bus 7 is fixedly installed in the switch cabinet body 1 to ensure the stability and efficiency of the electrical connection. The electric energy first enters the cable room 18 through the main bus 7. The design here ensures that the electrical gap meets the safety requirement of ≥160mm, and effectively prevents short circuit and discharge. In the trolley room 3, the circuit breaker 5 is a core component. Its incoming line end receives the electric energy from the main bus 7, and then distributes the electric energy to each branch system through the outgoing line end.

[0033] refer to Figure 2 , Figure 3 and Figure 4A control instrument 20 is fixedly installed inside the instrument room 2. The control instrument 20 is electrically connected to the current transformer 6 and the circuit breaker 5. The control instrument installed in the instrument room 2 is electrically connected to the current transformer 6 and the circuit breaker 5 to monitor the power system parameters in real time. Once an abnormal situation is detected, the circuit can be quickly cut off by the circuit breaker 5 to achieve the protection function. The switch cabinet body 1 is made of high-strength insulating material. The entire switch cabinet body 1 is made of high-strength insulating material to ensure the electrical insulation performance of the equipment under different operating environments. The grounding terminal of the circuit breaker 5 is connected to a grounding device 11, and the grounding device 11 is grounded to the ground. The grounding device 11 is closely connected to the grounding terminal of the circuit breaker 5 and is directly grounded to the ground, providing a safe grounding path for the equipment and further enhancing the protection performance. The incoming line terminal, the outgoing line terminal and the grounding terminal of the circuit breaker 5 are all fixedly installed with contacts 15. The cable room 1 A lightning arrester 10 is fixedly installed on the inner bottom surface of 8, and the lightning arrester 10 is electrically connected to the main bus 7 and the grounding device 11. The lightning arrester 10 fixedly installed on the inner bottom surface of the cable room 18 is electrically connected to the main bus 7 and the grounding device 11, which provides reliable lightning protection for the equipment and reduces the potential threat of lightning to the equipment. A heat dissipation chamber 12 is provided inside the trolley room 3 and the branch room 4, and a plurality of radiators 13 are provided inside the heat dissipation chamber 12. The trolley room 3 and the branch room 4 are both provided with a heat dissipation chamber 12, which contains multiple radiators 13. These radiators 13 can effectively dissipate the heat generated by the equipment during operation to prevent performance degradation or damage caused by overheating of the equipment. The main bus 7 and the branch line 8 are fixed to the inside of the switch cabinet body 1 through insulators 14. The main bus 7 and the branch line 8 are firmly fixed to the inside of the switch cabinet body 1 through insulators 14, ensuring the stability and safety of the electrical connection.

[0034] Working principle: Please refer to Figure 1-Figure 4As shown, when in use, the main busbar 7 is fixedly installed in the switch cabinet body 1 to ensure the stability and efficiency of the electrical connection. The electric energy first enters the cable chamber 18 through the main busbar 7. The design here ensures that the electrical gap meets the safety requirement of ≥160mm, effectively preventing short circuit and discharge. In the trolley room 3, the circuit breaker 5 is a core component, and its incoming line end receives the electric energy from the main busbar 7, and then distributes the electric energy to each branch system through the outgoing line end. The control instrument installed in the instrument room 2 is electrically connected to the current transformer 6 and the circuit breaker 5 to monitor the power system parameters in real time. Once an abnormal situation is detected, the circuit can be quickly cut off through the circuit breaker 5 to achieve the protection function. The grounding device 11 is closely connected to the grounding end of the circuit breaker 5 and is directly grounded to the ground, providing a safe grounding path for the equipment, further enhancing To enhance the protection performance, a heat dissipation chamber 12 is provided inside the trolley room 3 and the branch line room 4, and a plurality of radiators 13 are installed inside. These radiators 13 can effectively dissipate the heat generated by the equipment during operation to prevent the performance degradation or damage caused by overheating of the equipment. The entire switch cabinet body 1 is made of high-strength insulating material to ensure the electrical insulation performance of the equipment under different operating environments. The lightning arrester 10 fixedly installed on the bottom surface of the cable room 18 is electrically connected to the main bus 7 and the grounding device 11, providing reliable lightning protection for the equipment and reducing the potential threat of lightning to the equipment. The main bus 7 and the branch line 8 are firmly fixed inside the switch cabinet body 1 by insulators 14, ensuring the stability and safety of the electrical connection. The incoming line, outgoing line and grounding terminals of the circuit breaker 5 are equipped with contacts 16 to ensure the reliability and efficiency of current transmission.

[0035] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main transformer incoming line switch, characterized in that: include: A switch cabinet body (1), the switch cabinet body (1) is a KYN28A-12 (G) main transformer incoming line switch cabinet with a width of 1000 mm, the switch cabinet body (1) is provided with an instrument room (2), a trolley room (3), a branch line room (4), a small busbar room (17), a cable room (18) and a grounding room (19) inside, a circuit breaker (5) is fixedly installed on the trolley of the trolley room (3), the incoming line end of the circuit breaker (5) extends to the inside of the cable room (18), the outgoing line end of the circuit breaker (5) extends to the inside of the branch line room (4), two current transformers (6) are fixedly installed inside the cable room (18), a main busbar (7) is laid inside the current transformer (6), and the main busbar (7) is fixedly installed Inside the current transformer (6), a branch line (8) is laid inside the branch line chamber (4), and a plurality of wall bushings (9) are arranged inside the branch line chamber (4). Two insulating support columns (16) are fixedly installed on one side of the (9), and the wall bushing (9) is fixedly installed inside the branch line chamber (4) through the insulating support columns (16). The branch line (8) is sleeved inside the wall bushing (9). The electrical layout maintains an air clearance of ≥160 mm between the devices inside the switch cabinet body (1). The main busbar (7) adopts TMY-3 (120X10) specifications, and the rated current can reach 4000A. The branch line (8) adopts TMY-4 (100X10) specifications.

2. A main transformer incoming line switch according to claim 1, characterized in that: A control instrument (20) is fixedly installed inside the instrument room (2), and the control instrument (20) is electrically connected to the current transformer (6) and the circuit breaker (5).

3. A main transformer incoming line switch according to claim 1, characterized in that: The switch cabinet body (1) is made of high-strength insulating material.

4. A main transformer incoming line switch according to claim 1, characterized in that: The grounding terminal of the circuit breaker (5) is connected to a grounding device (11), and the grounding device (11) is grounded to the ground.

5. A main transformer incoming line switch according to claim 1, characterized in that: The incoming line terminal, the outgoing line terminal and the grounding terminal of the circuit breaker (5) are all fixedly mounted with contacts (15).

6. A main transformer incoming line switch according to claim 1, characterized in that: A lightning arrester (10) is fixedly installed on the inner bottom surface of the cable chamber (18), and the lightning arrester (10) is electrically connected to the main busbar (7) and the grounding device (11).

7. A main transformer incoming line switch according to claim 1, characterized in that: The trolley room (3) and the branch line room (4) are both provided with a heat dissipation room (12), and a plurality of radiators (13) are provided inside the heat dissipation room (12).

8. A main transformer incoming line switch according to claim 1, characterized in that: The main busbar (7) and the branch line (8) are fixed inside the switch cabinet body (1) via insulators (14).

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