Low voltage phase changing circuit breaker

Abstract

The utility model provides a kind of low voltage commutator circuit breaker, comprising: shell, the opposite two sides of shell are equipped with main wiring end and auxiliary wiring end respectively, main wiring end and auxiliary wiring end are equipped with main terminal and several auxiliary terminals respectively, the end of main terminal and several auxiliary terminals is all penetrated to shell interior;Conductive seat, main terminal is connected with conductive seat, conductive seat is rotatably equipped with contact, each auxiliary terminal is equipped with connecting piece, contact is connected with one connecting piece when rotating, for intercommunication main terminal and corresponding auxiliary terminal. By rotating contact, make contact and one of the auxiliary terminals of auxiliary wiring end be connected, to intercommunicate main wiring end and auxiliary wiring end, to complete commutation in several seconds, can be according to load fluctuation to carry out fast, dynamic adjustment, overcome the problem that adjustment efficiency is low, time-consuming and laborious, cannot realize frequent, timely adjustment.

Description

Technical Field

[0001] This utility model relates to the field of power distribution network technology, and in particular to a low-voltage phase-switching circuit breaker. Background Technology

[0002] In low-voltage distribution networks, especially in residential power supply areas, single-phase loads dominate. Due to the large differences in user electricity consumption behavior, uneven load distribution, and random fluctuations, severe imbalances in the three-phase output load of distribution transformers are easily caused. These imbalances can lead to a series of problems, such as increased energy losses in transformers and lines, reducing power supply efficiency; voltage deviations, affecting power quality; increased neutral current in transformers, and even overheating and damage to equipment, posing safety hazards.

[0003] Currently, resolving three-phase imbalance mainly relies on manual adjustment. This requires maintenance personnel to go to the site to measure the current in each phase and analyze the imbalance. Then, they manually switch the lead of a single-phase load from one phase to another inside the distribution box. However, this method has obvious drawbacks: firstly, the adjustment efficiency is low, time-consuming, and labor-intensive, making it impossible to achieve frequent and timely adjustments; secondly, manual operation involves direct contact with live parts, posing a high safety risk. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a low-voltage commutation circuit breaker, which solves the problems of low commutation efficiency and low safety in existing technologies.

[0005] According to embodiments of this utility model, the following technical solution is adopted:

[0006] Low-voltage commutated circuit breakers include:

[0007] The housing has a main terminal and a secondary terminal on opposite sides. The main terminal and the secondary terminal are respectively provided with a main terminal and several secondary terminals. The ends of the main terminal and the several secondary terminals all penetrate into the interior of the housing.

[0008] The conductive base has a main terminal connected to it. The conductive base is rotatably equipped with a contact. Each secondary terminal is equipped with a connector. When the contact rotates, it connects to one of the connectors to connect the main terminal and the corresponding secondary terminal.

[0009] Preferably, the connector is a U-shaped clip, and the end of the U-shaped clip is fixedly connected to the secondary terminal so that the opening of the U-shaped clip faces the contact.

[0010] Preferably, the housing includes a base and a cover plate, the cover plate is fastened to the base and fixedly connected to it by bolts, and the conductive base, main terminal and auxiliary terminal are all located on the base.

[0011] Preferably, the cover plate is equipped with a knob for rotation, and the knob is engaged with the contact to drive the contact to rotate.

[0012] Preferably, the cover plate has a limiting arc strip coaxial with the knob, and the knob has a pointer along its radial direction, with the pointer located between the two ends of the limiting arc strip.

[0013] Preferably, baffles are provided on both sides of the cover plate, and the two baffles are respectively fastened to the main terminal and the auxiliary terminal.

[0014] Preferably, the base is also provided with several partitions, which are located between two adjacent sub-terminals, and each partition is provided with a through groove for the contact to pass through.

[0015] Preferably, each inner side of the through groove is provided with an installation groove, each installation groove is provided with a stop block, and the inner side of the installation groove is provided with a spring piece, which abuts against the stop block.

[0016] Preferably, guide slopes are provided on both sides of the contact.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this solution, by rotating the contact, the contact is connected to one of the secondary terminals of the secondary terminal, thereby connecting the main terminal and the secondary terminal. This enables phase commutation to be completed within seconds, allowing for rapid and dynamic adjustments based on load fluctuations. This overcomes the problems of low adjustment efficiency, time-consuming and labor-intensive adjustments, and the inability to achieve frequent and timely adjustments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the circuit breaker in an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker in an embodiment of this utility model.

[0021] Figure 3 for Figure 2 A magnified structural diagram of region A in the middle.

[0022] In the above attached figures:

[0023] 1. Base; 101. Main terminal; 102. Secondary terminal;

[0024] 2. Cover plate; 201. Limiting arc strip; 202. Baffle;

[0025] 3. Knob; 301. Pointer;

[0026] 4. Main terminal; 401. Secondary terminal;

[0027] 5. Partition plate; 501. Through groove; 502. Stop block; 503. Spring clip; 504. Mounting groove;

[0028] 6. U-shaped clip;

[0029] 7. Contact; 701. Guide ramp

[0030] 8. Conductive base. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0032] This utility model embodiment proposes a low-voltage phase-switching circuit breaker, comprising:

[0033] The housing has a main terminal 101 and a secondary terminal 102 on opposite sides. The main terminal 101 and the secondary terminal 102 are respectively provided with a main terminal 4 and a number of secondary terminals 401. The ends of the main terminal 4 and the number of secondary terminals 401 all penetrate into the housing.

[0034] The conductive base 8 has a main terminal 4 connected to it. The conductive base 8 is rotatably equipped with a contact 7. Each secondary terminal 401 is equipped with a connector. When the contact 7 rotates, it connects with one of the connectors to connect the main terminal 4 with the corresponding secondary terminal 401.

[0035] In this embodiment, as Figure 2 As shown, the main terminal 101 and the auxiliary terminal 102 are located at the upper and lower ends of the housing, respectively. The main terminal 4 and several auxiliary terminals 401 installed inside are used for wiring. Figure 2 Taking the demonstration as an example, there are three secondary terminals 401. The conductive base 8 is fixedly connected to the main terminal 4 to maintain a continuous state at all times. The contact 7 acts as a connecting bridge. By rotating the contact 7, it connects to one of the secondary terminals 401 of the secondary terminal 102, thus connecting the main terminal 101 and the secondary terminal 102. This allows for phase commutation to be completed within seconds, enabling rapid and dynamic adjustments based on load fluctuations. This overcomes the problems of low adjustment efficiency, time-consuming and labor-intensive adjustments, and the inability to achieve frequent and timely adjustments. The adjustment of the contact 7 can be achieved using insulating tools such as insulating clamps, and the connection between the contact 7 and the secondary terminal 401 can be a fixed connection method such as abutment.

[0036] Specifically, the connection method between contact 7 and secondary terminal 401 is optimized, such as... Figure 2As shown, the connector is a U-shaped clip 6, with its end fixedly connected to the secondary terminal 401 so that the opening of the U-shaped clip 6 faces the contact 7. When the U-shaped clip 6 is not connected to the contact 7, the width of its opening is less than the thickness of the contact 7. When the contact 7 is rotated so that it is on the side of the U-shaped clip 6, the opening of the U-shaped clip 6 deforms and opens, allowing the contact 7 to be embedded inside the U-shaped clip 6 and clamped, forming a stable mechanical connection. Moreover, guide slopes 701 are provided on both sides of the contact 7. When the rotating contact 7 needs to be inserted into or removed from the U-shaped clip 6, the contact between the guide slope 701 and the edge of the U-shaped clip 6 is a sliding contact between slopes, rather than a hard collision of right angles, which can overcome part of the clamping force of the U-shaped clip 6, making the operation more effortless.

[0037] Specifically, such as Figure 1 As shown, the housing includes a base 1 and a cover plate 2. The cover plate 2 is fastened to the base 1 and fixedly connected to it by bolts. The conductive base 8, the main terminal 101, and the auxiliary terminal 102 are all located on the base 1. All core conductive components (conductive base 8, main terminal 101, and auxiliary terminal 102) are integrated on the base 1, while the cover plate 2 mainly serves to cover and seal. When it is necessary to inspect the internal structure, simply unscrew the bolts and remove the cover plate 2. All live parts remain securely installed on the base 1, facilitating maintenance operations.

[0038] Secondly, the cover plate 2 is equipped with a knob 3, which is engaged with the contact 7 to drive the contact 7 to rotate. The operator only needs to rotate the knob 3 to control the internal contact 7 to switch between different phase lines, making the three-phase load adjustment work simple and quick. At the same time, the knob 3 is made of insulating material, achieving complete physical and electrical isolation.

[0039] Meanwhile, the cover plate 2 is provided with a limiting arc-shaped strip 201 coaxial with the knob 3, and the knob 3 is provided with a pointer 301 along its radial direction, with the pointer 301 located between the two ends of the limiting arc-shaped strip 201. When the knob 3 is rotated, the pointer 301 rotates synchronously with the knob 3. The cover plate 2 is provided with markings corresponding to each secondary terminal 401, so that it can be clearly confirmed at a glance which phase of power is currently connected to the load by the markings pointed to by the pointer 301, avoiding blind operation and misjudgment. At the same time, the two ends of the limiting arc-shaped strip 201 can also serve as mechanical stops for the rotation of the knob 3, preventing the pointer 301 from rotating outside the range of the two ends of the limiting arc-shaped strip 201.

[0040] Furthermore, such as Figure 2 As shown, baffles 202 are provided on both sides of the cover plate 2. The two baffles 202 are respectively fastened to the main terminal 101 and the auxiliary terminal 102, effectively forming electric shock protection for the main terminal 101 and the auxiliary terminal 102, and improving safety.

[0041] Specifically, such as Figure 3As shown, the base 1 is also provided with several partitions 5, which are located between two adjacent secondary terminals 401, and each partition 5 is provided with a through groove 501 for the contact 7 to pass through. The partitions 5 physically isolate the three secondary terminals 401 completely, forming a certain insulation barrier, which to a certain extent avoids arc flashover or direct short circuit between different phase lines caused by moisture condensation, insect contact, etc.

[0042] Meanwhile, mounting slots 504 are provided on both inner sides of the through slot 501, and a stop block 502 passes through each of the two mounting slots 504. A spring piece 503 is provided on the inner side of the mounting slot 504. The spring piece 503 abuts against the stop block 502. When the contact 7 rotates to the through slot 501, it presses the arc-shaped surface at the end of the stop block 502, so that the stop block 502 is pressed into the mounting slot 504, thereby facilitating the contact 7 to pass through the stop block 502. After the contact 7 has completely passed through the stop block 502, the stop block 502 is reset under the action of the spring piece 503, thus closing the through slot 501. The elasticity of the spring piece 503 can be selected according to actual needs, that is, to satisfy the easy passage of the contact 7 and the reset of the stop block 502.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A low-voltage commutated circuit breaker, characterized in that, include: The housing has a main terminal (101) and a secondary terminal (102) on opposite sides. The main terminal (101) and the secondary terminal (102) are respectively provided with a main terminal (4) and a plurality of secondary terminals (401). The ends of the main terminal (4) and the plurality of secondary terminals (401) all penetrate into the interior of the housing. The conductive base (8) is connected to the main terminal (4). The conductive base (8) is rotatably provided with a contact (7). Each of the sub-terminals (401) is provided with a connector. When the contact (7) rotates, it is connected to one of the connectors to connect the main terminal (4) and the corresponding sub-terminal (401).

2. The low-voltage commutated circuit breaker according to claim 1, characterized in that, The connector is a U-shaped clip (6), and the end of the U-shaped clip (6) is fixedly connected to the sub-terminal (401) so that the opening of the U-shaped clip (6) faces the contact (7).

3. The low-voltage commutated circuit breaker according to claim 1, characterized in that, The housing includes a base (1) and a cover plate (2). The cover plate (2) is fastened to the base (1) and fixedly connected to it by bolts. The conductive base (8), the main terminal (101) and the auxiliary terminal (102) are all located on the base (1).

4. The low-voltage commutated circuit breaker according to claim 3, characterized in that, The cover plate (2) is provided with a knob (3) for rotation. The knob (3) is engaged with the contact (7) and is used to drive the contact (7) to rotate.

5. The low-voltage commutated circuit breaker according to claim 4, characterized in that, The cover plate (2) is provided with a limiting arc strip (201) coaxial with the knob (3), and the knob (3) is provided with a pointer (301) along its radial direction, the pointer (301) being located between the two ends of the limiting arc strip (201).

6. The low-voltage commutated circuit breaker according to any one of claims 3-5, characterized in that, The cover plate (2) is provided with baffles (202) on both sides opposite to each other, and the two baffles (202) are respectively fastened to the main terminal (101) and the auxiliary terminal (102).

7. The low-voltage commutated circuit breaker according to claim 3, characterized in that, The base (1) is also provided with a plurality of partitions (5), which are located between two adjacent sub-terminals (401), and each partition (5) is provided with a through groove (501) for the contact (7) to pass through.

8. The low-voltage commutated circuit breaker according to claim 7, characterized in that, The through groove (501) has two inner sides with mounting grooves (504), and each of the two mounting grooves (504) has a stop block (502) passing through it. The inner side of the mounting groove (504) is provided with a spring piece (503), and the spring piece (503) abuts against the stop block (502).

9. The low-voltage commutated circuit breaker according to claim 1, characterized in that, Guide slopes (701) are provided on both sides of the contact (7).

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