Circuit breaker and fuse combination device for transformer protection

Abstract

This utility model relates to the field of transformer protection technology, and more particularly to the field of transformer protection technology. This utility model provides a combination device of circuit breaker and fuse for transformer protection, including a circuit breaker base, a mounting base fixedly connected to the bottom of the circuit breaker base, a fuse holder fixedly connected to the top of the mounting base, a grounding insulating post fixedly connected to the top of the fuse holder, a current-carrying rod fixedly connected to the top of the grounding insulating post, a first fuse clip fixedly connected to the outer side of the current-carrying rod, a circuit breaker insulating post fixedly connected to one side of the circuit breaker base, a circuit breaker frame fixedly connected to one end of the circuit breaker insulating post, a circuit breaker switch installed inside the circuit breaker frame, an overcurrent insulating post installed on the top of the circuit breaker base, an overcurrent post fixedly connected to the top of the overcurrent insulating post, and a connecting frame and a second fuse clip fixedly connected to the outer side of the overcurrent post. This utility model greatly improves the reliability of the protection system and reduces the risk of equipment damage or escalation of faults due to the failure of a single protection device.

Description

Technical Field

[0001] This utility model relates to the field of transformer protection technology, and in particular to a combination device of circuit breaker and fuse for transformer protection. Background Technology

[0002] In modern power systems, transformers, as core equipment, undertake the crucial tasks of voltage transformation, power distribution, and transmission. Their stable operation plays a decisive role in ensuring the reliability, security, and quality of power supply. However, during operation, transformers inevitably face various fault risks, such as overload, short circuit, and overvoltage. If these faults are not handled promptly, they can not only damage the transformer itself but also trigger a chain reaction, leading to widespread power outages and severely impacting the social economy and people's lives. To effectively protect transformers and ensure the safe and stable operation of the power system, various protection devices have emerged. Among them, circuit breakers and fuses, as two important overcurrent protection devices, each play a unique role in the field of transformer protection.

[0003] However, existing transformer protection circuit breakers and fuses are usually used separately. However, these circuit breakers and fuses cannot complement each other in terms of performance, resulting in poor reliability and flexibility of circuit protection. When the circuit breaker and fuse fail due to aging, they cannot disconnect the circuit in time, which may lead to equipment damage or the risk of the fault expanding. To address the above problems, a combination device of transformer protection circuit breaker and fuse is now being developed. Utility Model Content

[0004] In order to overcome the shortcomings of existing devices where circuit breakers and fuses for transformer protection cannot complement each other in terms of performance, resulting in poor reliability and flexibility of circuit protection, this utility model provides a combination device for circuit breakers and fuses for transformer protection.

[0005] The technical implementation scheme of this utility model is as follows: a combination device of circuit breaker and fuse for transformer protection, including a circuit breaker base, a mounting base fixedly connected to the bottom of the circuit breaker base, a fuse base fixedly connected to the top of the mounting base, a grounding insulating column fixedly connected to the top of the fuse base, a current-carrying rod fixedly connected to the top of the grounding insulating column, a first fuse clamp fixedly connected to the outer side of the current-carrying rod, a circuit breaker insulating column fixedly connected to one side of the circuit breaker base, a circuit breaker frame fixedly connected to one end of the circuit breaker insulating column, a circuit breaker gate installed on the inner side of the circuit breaker frame, an overcurrent insulating column installed on the top of the circuit breaker base, an overcurrent column fixedly connected to the top of the overcurrent insulating column, and a connecting frame and a second fuse clamp fixedly connected to the outer side of the overcurrent column.

[0006] Optionally, a receiving pole is fixedly connected to the top of the power-conducting pole, and a fixing nut is threaded onto the outer side of the receiving pole.

[0007] Optionally, the mounting base is further provided with mounting plates fixedly connected to the four corners of the mounting base, and the top of the mounting plates is provided with fixing openings.

[0008] Optionally, the circuit breaker also includes a movable pin that is movably connected through the front of the circuit breaker frame, and the circuit breaker frame is movably connected to the circuit breaker gate via the movable pin.

[0009] Optionally, the top of the connecting frame is integrally connected to a power connection clamp, which is snap-fitted to the circuit breaker.

[0010] Optionally, a fuse rod is installed on the inner side of both the first fuse clip and the second fuse clip, and fuse connectors are fixedly connected to both ends of the fuse rod. The fuse connectors are snapped into the first fuse clip and the second fuse clip.

[0011] This utility model has the following advantages:

[0012] 1. This utility model, through the setting of a first fuse clip, a second fuse clip, a circuit breaker, and an overcurrent terminal, allows the operator to install the power cord on the connecting pole and secure it with a fixing nut. Then, the fuse connectors at both ends of the fuse rod are installed on the first and second fuse clips respectively. The outgoing wire is then installed on the circuit breaker frame. After installation, the circuit breaker is pushed, and it engages with the overcurrent clamp on the connecting frame, thus forming a complete circuit. In the event of an overload, the overcurrent clamp expands due to thermal expansion, thereby pushing the circuit breaker to trip and disconnect the circuit. The fuse rod will quickly melt and cut off the circuit due to the increase in current. At the same time, in the event of a short circuit fault, the fuse rod will quickly melt due to the excessive current, and send a signal to the circuit breaker to cause the circuit breaker to trip quickly. When the fuse rod fails due to aging, the circuit breaker can trip to cut off the power. Conversely, when the circuit breaker fails due to aging, the fuse rod can melt to cut off the power, ensuring that the circuit is protected. This mutual backup mechanism greatly improves the reliability of the protection system and reduces the risk of equipment damage or fault expansion due to the failure of a single protection device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a partial structural schematic diagram of the circuit breaker of this utility model;

[0015] Figure 3 This is a partial structural schematic diagram of the circuit breaker seat of this utility model;

[0016] Figure 4 This is a partial structural schematic diagram of the fuse holder of this utility model.

[0017] The meanings of the reference numerals in the diagram are as follows: 1. Mounting base; 2. Mounting plate; 3. Fixing port; 4. Fuse holder; 5. Electrically connected insulating post; 6. Power-carrying pole; 7. Electrically connected pole; 8. Fixing nut; 9. First fuse clip; 10. Circuit breaker base; 11. Circuit breaker insulating post; 12. Circuit breaker frame; 13. Movable pin; 14. Circuit breaker; 15. Overcurrent insulating post; 16. Overcurrent post; 17. Connecting frame; 18. Electrically connected clamp plate; 19. Second fuse clip; 20. Fuse connector; 21. Fuse rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0019] A circuit breaker and fuse combination device for transformer protection includes a circuit breaker base 10. A mounting base 1 is fixedly connected to the bottom of the circuit breaker base 10. A fuse holder 4 is fixedly connected to the top of the mounting base 1. A current-connecting insulating post 5 is fixedly connected to the top of the fuse holder 4. A current-carrying rod 6 is fixedly connected to the top of the current-connecting insulating post 5. A first fuse clip 9 is fixedly connected to the outside of the current-carrying rod 6. A circuit breaker insulating post 11 is fixedly connected to one side of the circuit breaker base 10. A circuit breaker frame 12 is fixedly connected to one end of the circuit breaker insulating post 11. A circuit breaker gate 14 is installed inside the circuit breaker frame 12. An overcurrent insulating post 15 is installed on the top of the circuit breaker base 10. An overcurrent post 16 is fixedly connected to the top of the overcurrent insulating post 15. A connecting frame 17 and a second fuse clip 19 are fixedly connected to the outside of the overcurrent post 16.

[0020] It should be noted that the power cord is installed on the connecting rod 7 and fixed with the fixing nut 8. Then, the fuse connectors 20 at both ends of the fuse rod 21 are installed on the first fuse clip 9 and the second fuse clip 19 respectively. Then, the outgoing wire is installed on the circuit breaker 12. After installation, push the circuit breaker 14. The circuit breaker 14 is engaged with the connecting clamp plate 18 on the connecting frame 17, and a complete circuit is formed.

[0021] like Figure 1 , Figure 2 and Figure 4 As shown, a connecting rod 7 is fixedly connected to the top of the power-carrying rod 6, and a fixing nut 8 is threadedly connected to the outside of the connecting rod 7.

[0022] It should be noted that when the staff installs the power cord on the power receiving pole 7, the fixing nut 8 can be used to fix the power cord.

[0023] like Figure 1 and Figure 2As shown, mounting plates 2 are fixedly connected to the four corners of the mounting base 1, and a fixing opening 3 is provided on the top of the mounting plate 2.

[0024] It should be noted that when installing the device, the worker places the mounting plate 2 in the installation position, then inserts the bolts into the fixing port 3 and tightens the bolts to firmly fix the device in the installation position.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a movable pin 13 is movably connected through the front of the circuit breaker 12, and the circuit breaker 12 is movably connected to the circuit breaker 14 through the movable pin 13.

[0026] It should be noted that when the circuit breaker 14 is pushed or pulled, the circuit breaker 14 can be moved by the movable pin 13 and the circuit breaker frame 12, so that the circuit breaker 14 can be adjusted according to the needs.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the top of the connecting frame 17 is integrally connected to the power connection clamp 18, which is snapped into connection with the circuit breaker 14.

[0028] It should be noted that by pushing the circuit breaker 14 to connect with the power connection clamp 18, the power connection clamp 18 can lock and fix the circuit breaker 14, so that the circuit breaker 14 and the power connection clamp 18 can be firmly fixed together.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a fuse rod 21 is installed on the inner side of both the first fuse clip 9 and the second fuse clip 19. Both ends of the fuse rod 21 are fixedly connected to fuse connectors 20, which are snapped together with the first fuse clip 9 and the second fuse clip 19.

[0030] It should be noted that the fuse connectors 20 at both ends of the fuse rod 21 are installed on the first fuse clip 9 and the second fuse clip 19 respectively. When a short circuit fault occurs, the fuse rod 21 will melt quickly due to the excessive current.

[0031] Working principle: During use, the operator installs the power cord on the connecting rod 7 and secures it with the fixing nut 8. Then, the fuse connectors 20 at both ends of the fuse rod 21 are installed on the first fuse clip 9 and the second fuse clip 19, respectively. The outgoing wire is then installed on the circuit breaker 12. After installation, the circuit breaker 14 is pushed, and the circuit breaker 14 engages with the connecting clamp 18 on the connecting frame 17, thus forming a complete circuit. In the event of an overload, the connecting clamp 18 expands due to thermal expansion. This causes the circuit breaker 14 to trip and disconnect the circuit. The fuse rod 21 will quickly melt and disconnect the circuit due to the increase in current. At the same time, when a short circuit fault occurs, the fuse rod 21 will quickly melt due to the excessive current, and send a signal to the circuit breaker 14 to prompt the circuit breaker to trip quickly. When the fuse rod 21 fails due to aging, the circuit breaker 14 can trip to disconnect the power. Conversely, when the circuit breaker 14 fails due to aging, the fuse rod 21 can melt to disconnect the power, ensuring that the circuit is protected.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A combination circuit breaker and fuse device for transformer protection comprising a circuit breaker housing (10) characterised in that: The bottom of the circuit breaker seat (10) is fixedly connected with a mounting seat (1), the top of the mounting seat (1) is fixedly connected with a fuse seat (4), the top of the fuse seat (4) is fixedly connected with an electric connection insulating column (5), the top end of the electric connection insulating column (5) is fixedly connected with an electric conduction rod (6), the outer side of the electric conduction rod (6) is fixedly connected with a first fuse clamp (9), one side of the circuit breaker seat (10) is fixedly connected with a circuit breaker insulating column (11), one end of the circuit breaker insulating column (11) is fixedly connected with a circuit breaker frame (12), the inner side of the circuit breaker frame (12) is mounted with a circuit breaker gate (14), the top of the circuit breaker seat (10) is mounted with an overcurrent insulating column (15), the top end of the overcurrent insulating column (15) is fixedly connected with an overcurrent column (16), the outer side of the overcurrent column (16) is respectively fixedly connected with a connecting frame (17) and a second fuse clamp (19).

2. The combination circuit breaker and fuse device for transformer protection of claim 1, wherein: The top end of the electric conduction rod (6) is fixedly connected with an electric connection rod (7), and the outer side of the electric connection rod (7) is threadedly connected with a fixed nut (8).

3. The combination circuit breaker and fuse device for transformer protection of claim 1, wherein: The four corners of the mounting seat (1) are fixedly connected with mounting plates (2), and the top of the mounting plate (2) is provided with a fixed opening (3).

4. The combination circuit breaker and fuse device for transformer protection of claim 1, wherein: The front of the circuit breaker frame (12) is movably connected with a movable pin (13), and the circuit breaker frame (12) is movably connected with the circuit breaker gate (14) through the movable pin (13).

5. The combination circuit breaker and fuse device for transformer protection of claim 1, wherein: The top of the connecting frame (17) is integrally connected with an electric connection clamp plate (18), and the electric connection clamp plate (18) is connected with the circuit breaker gate (14) in a clamped manner.

6. The combination circuit breaker and fuse device for transformer protection of claim 1, wherein: The inner sides of the first fuse clamp (9) and the second fuse clamp (19) are mounted with fuse rods (21), and the two ends of the fuse rod (21) are fixedly connected with fuse connectors (20), and the fuse connectors (20) are connected with the first fuse clamp (9) and the second fuse clamp (19) in a clamped manner.

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