A molded case circuit breaker

Abstract

This utility model relates to the field of switchgear technology and discloses a molded case circuit breaker, comprising: a first component for disconnecting three phase wires; a second component for disconnecting the neutral wire; the first component and the second component are detachably connected. This utility model detachably connects the first and second components, allowing for their combination and disassembly. The first component can be used independently or connected to the second component for joint use. When the application scenario of the molded case circuit breaker changes, the installation of the second component can be rationally selected based on the load type and power supply system structure, thus enabling continued use without the need to purchase a new molded case circuit breaker. This improves the utilization rate of the molded case circuit breaker and reduces operating costs.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically to a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) are electrical devices used for circuit protection. They automatically interrupt current in the event of overload or short circuit to ensure electrical safety. Common types of MCCBs include 3P circuit breakers and 3P+N circuit breakers.

[0003] A 3P circuit breaker provides protection by disconnecting three phase wires (L1, L2, L3) in a three-phase circuit. It is suitable for pure three-phase loads (such as three-phase motors) or three-phase three-wire systems that do not require a neutral wire.

[0004] A 3P+N circuit breaker can disconnect the neutral line (N) while cutting off the three phase lines. It is mainly used in three-phase four-wire systems containing single-phase loads or in scenarios where the neutral line needs to be completely isolated to prevent the risk of the neutral line becoming live.

[0005] When selecting circuit breakers, it is necessary to choose the appropriate type based on the load type and power supply system structure. If the usage scenario changes, the original circuit breaker may become unusable due to functional incompatibility, requiring the purchase of a new, compatible model, resulting in idle and wasted old equipment and increased operating costs. Utility Model Content

[0006] In view of this, the present invention provides a molded case circuit breaker to solve the problem in the prior art that the type of circuit breaker needs to be selected reasonably according to the load type and the power supply system structure, and if the usage scenario changes, it is necessary to repurchase the appropriate model, resulting in the waste of old equipment and the increase in usage costs.

[0007] This utility model provides a molded case circuit breaker, comprising:

[0008] The first component is used to disconnect the three phase lines;

[0009] The second component is used to disconnect the neutral line;

[0010] The first component and the second component are detachably connected.

[0011] Beneficial effects: The first and second components can be detachably connected, allowing for their combination and disassembly. This enables the first component to be used independently or in conjunction with the second component. When the application scenario of the molded case circuit breaker changes, the installation of the second component can be rationally selected based on the load type and power supply system structure, allowing it to continue to be used without the need to purchase a new molded case circuit breaker. This improves the utilization rate of the molded case circuit breaker and reduces operating costs.

[0012] In one alternative implementation, the first component is plugged into the second component.

[0013] Beneficial effects: By plugging the first component into the second component, installation and disassembly are facilitated.

[0014] In one alternative embodiment, the first component is provided with a first plug-in portion, and the second component is provided with a second plug-in portion;

[0015] The molded case circuit breaker includes:

[0016] The connector has a third insertion part and a fourth insertion part, wherein the third insertion part is inserted and connected to the first insertion part, and the fourth insertion part is inserted and connected to the second insertion part.

[0017] Beneficial effect: By providing a third and a fourth connector, it can be connected to the first and second connectors respectively.

[0018] In one alternative embodiment, the connector includes:

[0019] The connecting body has a third plug-in portion and a fourth plug-in portion on each side;

[0020] The cross-sections of the connecting body, the third plug-in portion, and the fourth plug-in portion are U-shaped.

[0021] Beneficial effects: By setting the cross-section of the connecting body, the third plug-in part, and the fourth plug-in part to be "U" shaped, the first plug-in part and the second plug-in part can be located on the outside of the first component and the second component, thereby facilitating the quick positioning of the first plug-in part and the second plug-in part.

[0022] In one optional embodiment, the first plug-in portion is a first groove structure, the first groove structure is provided with a first blocking portion, and the third plug-in portion is provided with a first protrusion at one end away from the connecting body, the first protrusion and the first blocking portion are engaged and fixed.

[0023] And / or, the second plug-in portion is a second groove structure, the second groove structure is provided with a second blocking portion, and the fourth plug-in portion is provided with a second protrusion at one end away from the connecting body, the second protrusion and the second blocking portion are engaged and fixed.

[0024] Beneficial effects: By cooperating with the first protrusion and the first blocking part, and cooperating with the second protrusion and the second blocking part, the snap-fit ​​effect is better, and the connector is not easy to loosen.

[0025] In one optional embodiment, the first protrusion and the second protrusion are disposed opposite to each other;

[0026] And / or, the opening of the first groove structure is provided in an inverted cone shape;

[0027] And / or, the opening of the second groove structure is provided in an inverted cone shape;

[0028] And / or, the connecting body is provided with a through groove.

[0029] Beneficial effects: By setting the openings of the first and second groove structures to be inverted conical, the installation of the third and fourth insertion parts can be guided, making installation convenient and quick; by setting through grooves, it is easy for operators to hold the connectors, and thus easy to apply force to the connectors.

[0030] In one optional embodiment, the molded case circuit breaker includes:

[0031] Multiple passive temperature sensors are disposed within the first component and / or the second component for detecting the temperature of the terminals of the first component and / or the second component.

[0032] Beneficial effects: By setting up a passive temperature sensor, no external power supply is required. It obtains energy only by receiving ultra-high frequency electromagnetic wave signals emitted by the reader and uses the built-in temperature sensing element to obtain real-time temperature changes at its location. No wiring is required, which saves space and makes installation convenient. The passive temperature sensor can be placed close to the terminal block, and the temperature measurement accuracy is high. It can directly and quickly obtain the actual temperature changes at the terminal block, thus providing more accurate data for the circuit breaker's operating status.

[0033] In one alternative implementation, the first component includes:

[0034] First power supply circuit board;

[0035] And / or, the accessory circuit board is electrically connected to the first power-taking circuit board via a second electrical connection board;

[0036] And / or, the circuit board body is electrically connected to the first power-taking circuit board via a third electrical connection board;

[0037] And / or, the control element is electrically connected to the circuit board body and electrically connected to the accessory circuit board via a fourth electrical connection plate.

[0038] Beneficial effects: By using a second electrical connection plate to connect the first power supply circuit board and the accessory circuit board, using a third electrical connection plate to connect the first power supply circuit board and the circuit board body, and using a fourth electrical connection plate to connect the control components and the accessory circuit board, the internal structure of the first component can be simplified and modular installation can be achieved.

[0039] In one alternative implementation, the first component includes:

[0040] First base;

[0041] The first middle cover is fixed above the first base. The accessory circuit board is provided on the side of the first middle cover away from the first base. The first power supply circuit board is provided on the side of the first base away from the first middle cover.

[0042] The first upper cover is fixed above the first middle cover.

[0043] In one optional embodiment, the second electrical connection plate passes through the first base and the first middle cover;

[0044] And / or, the circuit board body is located on the side of the first base near the first middle cover;

[0045] And / or, the third electrical connection plate is disposed within the first base;

[0046] And / or, the control element electrically connected to the circuit board body is disposed on the first upper cover;

[0047] And / or, the fourth electrical connection plate is disposed inside the first middle cover.

[0048] In one optional embodiment, the first component is provided with a first electrical connection portion, which is electrically connected to the accessory circuit board, and the second component is provided with a second electrical connection portion, which is electrically connected to the first electrical connection portion through a first electrical connection plate.

[0049] Beneficial effect: By setting up the first electrical connection board, it is possible to electrically connect the accessory circuit board to other accessories on the side of the second component away from the first component. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of a molded case circuit breaker according to an embodiment of the present utility model;

[0052] Figure 2 for Figure 1 A schematic diagram of the structure of the first component of the molded case circuit breaker shown;

[0053] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0054] Figure 4 for Figure 2 The diagram shows the circuit connection structure of the first component.

[0055] Figure 5 for Figure 1 A schematic diagram of the structure of the second component of the molded case circuit breaker shown;

[0056] Figure 6 for Figure 5 The diagram shown is a structural schematic of the second component after removing the cover plate and the base.

[0057] Figure 7 for Figure 1 The diagram shows the structural structure of the connector of the molded case circuit breaker.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1. First component; 11. First electrical connection part; 12. First plug-in part; 121. First blocking part; 13. First power supply circuit board; 14. Accessory circuit board; 15. Second electrical connection board; 16. Circuit board body; 17. Third electrical connection board; 18. Control component; 19. Fourth electrical connection board; 110. First base; 111. First middle cover; 112. First upper cover; 113. Fifth electrical connection board; 114. Sixth electrical connection board 1. Connecting plate; 2. Second component; 21. Second electrical connection part; 22. Second plug-in part; 23. Second base; 24. Second power supply circuit board; 25. Busbar; 26. Second middle cover; 27. Second upper cover; 3. Connector; 31. Third plug-in part; 311. First protrusion; 32. Fourth plug-in part; 321. Second protrusion; 33. Connecting body; 331. Through groove; 4. First electrical connection plate; 5. Passive temperature sensing element. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0062] According to an embodiment of the present invention, a molded case circuit breaker is provided, comprising: a first component 1 for disconnecting three phase wires; a second component 2 for disconnecting the neutral wire; the first component 1 and the second component 2 are detachably connected.

[0063] The first component 1 and the second component 2 are detachably connected, allowing for the combination and disassembly of the first component 1 and the second component 2. This enables the first component 1 to be used independently or in conjunction with the second component 2. When the application scenario of the molded case circuit breaker changes, the installation of the second component 2 can be rationally selected based on the load type and power supply system structure, allowing it to continue to be used without the need to purchase a new molded case circuit breaker. This improves the utilization rate of the molded case circuit breaker and reduces the operating cost.

[0064] Existing molded case circuit breakers connect their circuit boards via leads. However, the inability to control the consistency of the lead installation process makes lead arrangement difficult. Furthermore, during use, wear or short circuits between leads can create safety hazards and lead to accidents.

[0065] like Figure 4 As shown, in one embodiment, the first component 1 includes: a first power-taking circuit board 13; an accessory circuit board 14 electrically connected to the first power-taking circuit board 13 via a second electrical connection board 15; a circuit board body 16 electrically connected to the first power-taking circuit board 13 via a third electrical connection board 17; and a control component 18 electrically connected to the circuit board body 16 and electrically connected to the accessory circuit board 14 via a fourth electrical connection board 19. The control component 18 is pluggably electrically connected to the circuit board body 16. Two copies each of the second electrical connection board 15 and the third electrical connection board 17 are provided, respectively for transmitting electrical signals and digital signals. The second electrical connection board 15 is electrically connected to the accessory circuit board 14 via a fifth electrical connection board 113; and the control component 18 is electrically connected to the accessory circuit board 14 via a sixth electrical connection board 114. By using a second electrical connection plate 15 to connect the first power supply circuit board 13 and the accessory circuit board 14, using a third electrical connection plate 17 to connect the first power supply circuit board 13 and the circuit board body 16, and using a fourth electrical connection plate 19 to connect the control component 18 and the accessory circuit board 14, the internal structure of the first component 1 can be simplified and modular installation can be achieved.

[0066] Of course, in other embodiments, the specific number of the second electrical connection board 15 and the third electrical connection board 17 is not limited and can be adjusted according to actual needs; the connection method between the control component 18 and the circuit board body 16 is not limited.

[0067] like Figures 2-4As shown, in one embodiment, the first component 1 includes: a first base 110; a first middle cover 111 fixed above the first base 110, with an accessory circuit board 14 provided on the side of the first middle cover 111 away from the first base 110, and a first power supply circuit board 13 provided on the side of the first base 110 away from the first middle cover 111; and a first upper cover 112 fixed above the first middle cover 111.

[0068] Furthermore, the second electrical connection plate 15 passes through the first base 110 and the first middle cover 111; the circuit board body 16 is located on the side of the first base 110 near the first middle cover 111; the third electrical connection plate 17 is located inside the first base 110; the control component 18 electrically connected to the circuit board body 16 is located on the first upper cover 112, and other control components 18 are located on the first middle cover 111; the fourth electrical connection plate 19 is located inside the first middle cover 111; the fifth electrical connection plate 113 is located inside the first middle cover 111; and the sixth electrical connection plate 114 is located on the side of the first upper cover 112 near the first middle cover 111.

[0069] like Figures 5-6 As shown, in one embodiment, the second component 2 includes: a second base 23; a second power supply circuit board 24 fixed on the second base 23; a busbar 25 disposed above the second power supply circuit board 24; a second middle cover 26 fixed above the second base 23; and a second upper cover 27 fixed above the second middle cover 26.

[0070] like Figure 2 , Figure 6 As shown, in one embodiment, the first component 1 is provided with a first electrical connection part 11, which is electrically connected to the accessory circuit board 14. The second component 2 is provided with a second electrical connection part 21, which is electrically connected to the first electrical connection part 11 via a first electrical connection plate 4. The first electrical connection part 11 is located on the side of the first middle cover 111 away from the first base 110, and the second electrical connection part 21 is located on the side of the second middle cover 26 away from the second base 23. By providing the first electrical connection plate 4, the accessory circuit board 14 can be electrically connected to other accessories on the side of the second component 2 away from the first component 1. As an alternative implementation, the first electrical connection plate 4 may not be provided, and the first electrical connection part 11 and the second electrical connection part 21 may be directly electrically connected.

[0071] In one embodiment, the first component 1 and the second component 2 are plugged into each other. Specifically, as shown... Figures 1-2 , Figure 5 As shown, the first component 1 is provided with a first insertion part 12, and the second component 2 is provided with a second insertion part 22; as Figure 7As shown, the molded case circuit breaker includes a connector 3, which has a third plug-in portion 31 and a fourth plug-in portion 32. The third plug-in portion 31 is plugged into and connected to the first plug-in portion 12, and the fourth plug-in portion 32 is plugged into and connected to the second plug-in portion 22. Connecting the first component 1 and the second component 2 by plugging them together facilitates installation and disassembly. The third plug-in portion 31 and the fourth plug-in portion 32 can respectively engage with the first plug-in portion 12 and the second plug-in portion 22. Alternatively, the first component 1 and the second component 2 can be connected by bolts or other means; no further limitations are imposed here. Alternatively, the first plug-in portion 12 can be a groove, and the second plug-in portion 22 can be a protrusion to form a plug-in connection; or the first plug-in portion 12 can be a protrusion, and the second plug-in portion 22 can be a groove to form a plug-in connection.

[0072] like Figure 2 , Figure 5 As shown, there are four first plug-in portions 12, four second plug-in portions 22, and four connectors 3. By providing four first plug-in portions 12, four second plug-in portions 22, and four connectors 3, the connection stability between the first component 1 and the second component 2 can be improved, preventing the second component 2 from falling off during use and causing danger. As an alternative implementation, there may also be three, five, or other numbers of first plug-in portions 12, two second plug-in portions 22, and four connectors 3; no further restrictions are imposed here.

[0073] like Figure 7 As shown, in one embodiment, the connector 3 includes a connecting body 33, with a third insertion portion 31 and a fourth insertion portion 32 respectively provided on both sides. Further, the cross-section of the connecting body 33, the third insertion portion 31, and the fourth insertion portion 32 is U-shaped. By setting the cross-section of the connecting body 33, the third insertion portion 31, and the fourth insertion portion 32 to be U-shaped, the first insertion portion 12 and the second insertion portion 22 can be located outside the first component 1 and the second component 2, thereby facilitating rapid positioning of the first insertion portion 12 and the second insertion portion 22. Alternatively, in a variable implementation, the cross-section of the connecting body 33, the third insertion portion 31, and the fourth insertion portion 32 can be straight, meaning the length extension direction of the connecting body 33 is the same as the length extension direction of the third insertion portion 31 and the length extension direction of the fourth insertion portion 32.

[0074] like Figure 7 As shown, in one embodiment, the connecting body 33 is provided with a through groove 331. By providing the through groove 331, it is easier for the operator to grip the connector 3, and thus easier to apply force to the connector 3. As an alternative implementation, the width of the connecting body 33 may be set to be larger, thereby making it easier for the operator to grip it.

[0075] like Figures 2-3 , Figure 5 , Figure 7 As shown, in one embodiment, the first insertion part 12 is a first groove structure, and a first blocking part 121 is provided in the first groove structure. The third insertion part 31 has a first protrusion 311 at the end away from the connecting body 33, and the first protrusion 311 is engaged and fixed with the first blocking part 121. The second insertion part 22 is a second groove structure, and a second blocking part is provided in the second groove structure. The fourth insertion part 32 has a second protrusion 321 at the end away from the connecting body 33, and the second protrusion 321 is engaged and fixed with the second blocking part. By cooperating with the first blocking part 121 and the second blocking part 321, the engagement effect is better, and the connector 3 is less likely to loosen. As an alternative implementation, the dimensions of the first groove structure and the second groove structure can be set to be smaller, the third insertion part 31 can be inserted into the first groove structure, and the fourth insertion part 32 can be inserted into the second groove structure.

[0076] like Figure 7 As shown, in one embodiment, the first protrusion 311 and the second protrusion 321 are disposed opposite to each other; the opening of the first groove structure is inverted conical; the opening of the second groove structure is inverted conical. Specifically, the first protrusion 311 is disposed inside the third insertion portion 31, and the second protrusion 321 is disposed inside the fourth insertion portion 32. By setting the openings of the first groove structure and the second groove structure to be inverted conical, the installation of the third insertion portion 31 and the fourth insertion portion 32 can be guided, making installation convenient and quick. As an alternative implementation, the first protrusion 311 may be disposed outside the third insertion portion 31, and the second protrusion 321 may be disposed outside the fourth insertion portion 32.

[0077] Existing molded case circuit breakers experience temperature increases at their terminals under abnormal conditions such as high line current or loose wiring. Temperature sensors are needed to measure the real-time temperature at each terminal for early warning. However, each temperature sensor requires a lead wire to be connected to an intelligent module for signal acquisition and processing. The multiple leads occupy significant space, and the temperature sensors are often far from the terminals, leading to inaccurate temperature measurements.

[0078] like Figure 4As shown, in one embodiment, the molded case circuit breaker includes multiple passive temperature sensors 5 disposed within a first component 1 and a second component 2, used to detect the temperature of the terminals of the first component 1 and the second component 2. By using passive temperature sensors 5, no external power supply is required; energy is obtained only by receiving ultra-high frequency electromagnetic wave signals emitted by a reader, and the real-time temperature change at the location can be obtained using the built-in temperature sensing element. No wiring is required, saving space and facilitating installation. The passive temperature sensors 5 can be placed close to the terminals, resulting in high accuracy in temperature measurement and direct, rapid acquisition of the actual temperature change at the terminals, thus providing more accurate data for the circuit breaker's operating status.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A molded case circuit breaker, characterized in that, include: First component (1), the first component (1) is used to disconnect three phase lines; Second component (2), the second component (2) is used to disconnect the neutral line; The first component (1) and the second component (2) are detachably connected.

2. The molded case circuit breaker according to claim 1, characterized in that, The first component (1) is plugged into the second component (2).

3. The molded case circuit breaker according to claim 1, characterized in that, The first component (1) is provided with a first plug-in portion (12), and the second component (2) is provided with a second plug-in portion (22); The molded case circuit breaker includes: The connector (3) is provided with a third plug-in part (31) and a fourth plug-in part (32). The third plug-in part (31) is plugged into the first plug-in part (12), and the fourth plug-in part (32) is plugged into the second plug-in part (22).

4. The molded case circuit breaker according to claim 3, characterized in that, The connector (3) includes: The connecting body (33) has the third plug-in part (31) and the fourth plug-in part (32) respectively on both sides; The cross-sections of the connecting body (33), the third plug-in part (31), and the fourth plug-in part (32) are U-shaped.

5. The molded case circuit breaker according to claim 4, characterized in that, The first plug-in part (12) is a first groove structure, and a first blocking part (121) is provided in the first groove structure. The third plug-in part (31) has a first protrusion (311) at one end away from the connecting body (33). The first protrusion (311) is engaged and fixed with the first blocking part (121). And / or, the second plug-in part (22) is a second groove structure, the second groove structure is provided with a second blocking part, and the fourth plug-in part (32) is provided with a second protrusion (321) at one end away from the connecting body (33), and the second protrusion (321) is engaged and fixed with the second blocking part.

6. The molded case circuit breaker according to claim 5, characterized in that, The first protrusion (311) and the second protrusion (321) are disposed opposite to each other; And / or, the opening of the first groove structure is provided in an inverted cone shape; And / or, the opening of the second groove structure is provided in an inverted cone shape; And / or, the connecting body (33) is provided with a through groove (331).

7. The molded case circuit breaker according to any one of claims 1 to 6, characterized in that, The molded case circuit breaker includes: Multiple passive temperature sensors (5) are disposed within the first component (1) and / or the second component (2) for detecting the terminal temperatures of the first component (1) and / or the second component (2).

8. The molded case circuit breaker according to any one of claims 1 to 6, characterized in that, The first component (1) includes: First power supply circuit board (13); And / or, the accessory circuit board (14) is electrically connected to the first power supply circuit board (13) via the second electrical connection board (15); And / or, the circuit board body (16) is electrically connected to the first power-taking circuit board (13) through a third electrical connection board (17); And / or, the control unit (18) is electrically connected to the circuit board body (16) and electrically connected to the accessory circuit board (14) via a fourth electrical connection plate (19).

9. The molded case circuit breaker according to claim 8, characterized in that, The first component (1) includes: First base (110); The first middle cover (111) is fixed above the first base (110). The accessory circuit board (14) is provided on the side of the first middle cover (111) away from the first base (110). The first power supply circuit board (13) is provided on the side of the first base (110) away from the first middle cover (111). The first upper cover (112) is fixed above the first middle cover (111).

10. The molded case circuit breaker according to claim 9, characterized in that, The second electrical connection plate (15) passes through the first base (110) and the first middle cover (111); And / or, the circuit board body (16) is disposed on the side of the first base (110) near the first middle cover (111); And / or, the third electrical connection plate (17) is disposed within the first base (110); And / or, the control element (18) electrically connected to the circuit board body (16) is disposed on the first upper cover (112); And / or, the fourth electrical connection plate (19) is disposed inside the first middle cover (111).

11. The molded case circuit breaker according to claim 8, characterized in that, The first component (1) is provided with a first electrical connection part (11), which is electrically connected to the accessory circuit board (14). The second component (2) is provided with a second electrical connection part (21), which is electrically connected to the first electrical connection part (11) through a first electrical connection plate (4).

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