An over / under voltage surge protection module and circuit breaker device

Abstract

This utility model discloses an over / under voltage surge protection module and circuit breaker device in the field of circuit breaker technology. It includes a housing, within which a circuit board and a surge detection mechanism are installed. The surge detection mechanism includes multiple axially stacked varistor plates. A neutral wire spring is provided on one side of each varistor plate; one end of the neutral wire spring is fixedly connected to the housing, and the other end is electrically connected to each varistor plate. By using a stacked arrangement, three varistor plates are stacked axially within an 18mm thick housing cavity. This not only maximizes the radial dimension of each varistor plate, enabling a surge protection module capacity of up to 40KA, but also maintains the module's thickness at 18mm, expanding its applicability.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to an over / under voltage surge protection module and a circuit breaker device. Background Technology

[0002] Miniature circuit breakers are widely used in low-voltage power distribution networks, mainly in various places such as industry, commerce, high-rise buildings and residential buildings. They can provide overcurrent protection and leakage protection for electrical equipment such as motors, power distribution lines and lighting circuits.

[0003] Over / under voltage surge protectors, used in conjunction with circuit breakers, provide overcurrent and leakage protection for electrical equipment and have sufficient capacity to discharge lightning current. For a 4P circuit breaker, the corresponding over / under voltage surge protector has three varistor modules for discharging current from the three phases. In existing technology, there are two structural types of over / under voltage surge protectors. The first type involves arranging three varistor modules flat within an 18mm module. This keeps the protector's thickness at 18mm, but due to space limitations, the radial dimension of the varistor modules is small, resulting in a smaller discharge current value and thus a smaller capacity, not exceeding 20KA. The second type installs three varistor modules within two 18mm modules, maximizing the radial dimension of each module. However, this results in a 36mm thickness for the over / under voltage surge protector, occupying a larger space and limiting its application.

[0004] Therefore, how to balance the thickness and capacity of overvoltage and undervoltage surge protectors has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide an over / under voltage surge protection module to address the above-mentioned technical problems, so as to improve the capacity of the over / under voltage surge protector and maintain the thickness of the over / under voltage surge protector at 18mm.

[0006] The technical solution adopted by this utility model is an over / under voltage surge protection module. The over / under voltage surge protection module includes a housing. A circuit board and a surge detection mechanism are installed in the inner cavity of the housing. The surge detection mechanism includes multiple axially stacked varistor plates. A neutral wire spring is provided on one side of the varistor plate. One end of the neutral wire spring is fixedly connected to the housing, and the other end of the neutral wire spring is electrically connected to each varistor plate.

[0007] Preferably, the neutral wire spring is soldered to the pressure-sensitive valve plate.

[0008] Preferably, the pressure-sensitive valve plate has a live wire electrode plate and a neutral wire electrode plate respectively provided at both ends of its axial direction.

[0009] Preferably, the pressure-sensitive valve includes a single pressure-sensitive valve and a double pressure-sensitive valve stacked vertically. The single pressure-sensitive valve has a lower live wire electrode at its end furthest from the double pressure-sensitive valve, and a lower neutral wire electrode at its end closest to the double pressure-sensitive valve. The double pressure-sensitive valve includes an upper pressure-sensitive valve and a lower pressure-sensitive valve. The lower pressure-sensitive valve is located between the upper and single pressure-sensitive valves. The lower pressure-sensitive valve has a middle live wire electrode at its end furthest from the upper pressure-sensitive valve, and an upper live wire electrode at its end furthest from the lower pressure-sensitive valve. An upper neutral wire electrode is located between the upper and lower pressure-sensitive valves. The lower neutral wire electrode and the upper neutral wire electrode are soldered to a neutral wire spring.

[0010] Preferably, the other end of the neutral wire spring is provided with a connection slot, and the lower neutral wire electrode and the upper neutral wire electrode are inserted into the connection slot.

[0011] Preferably, a warning light is installed on the housing, and an electrode post is provided on the circuit board. The electrode post is located on one side of the neutral wire spring. After the neutral wire spring is disconnected from the pressure-sensitive valve, it can abut against the electrode post and energize the warning light.

[0012] The second objective of this utility model is to provide a circuit breaker device, which includes the above-mentioned over / under voltage surge protection module and circuit breaker module. The over / under voltage surge protection module and circuit breaker module are assembled and connected, and the built-in tripping mechanism of the over / under voltage surge protection module is mechanically linked with the circuit breaker module.

[0013] Preferably, it also includes a reclosing module, which is assembled and connected between the over / under voltage surge protection module and the circuit breaker module, and the reclosing module and the circuit breaker module are mechanically linked.

[0014] Preferably, the over / under voltage surge protection module, reclosing module, and circuit breaker module are provided with interconnected wire passage holes.

[0015] The beneficial effects of this utility model are:

[0016] This utility model adopts a stacked arrangement, in which three pressure-sensitive valve plates are stacked and installed in the 18mm thick housing cavity along the axial direction. This not only maximizes the radial dimension of each pressure-sensitive valve plate, enabling the over- and under-voltage surge protection module to have a capacity of up to 40KA, but also keeps the thickness of the over- and under-voltage surge protection module at 18mm, thus expanding the application range of the over- and under-voltage surge protection module. Attached Figure Description

[0017] Figure 1This is a three-dimensional schematic diagram of the over / under voltage surge protection module of this utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of the over / under voltage surge protection module of this utility model after the back cover is hidden.

[0019] Figure 3 This is a front view of the over / under voltage surge protection module of this utility model after the back cover is hidden.

[0020] Figure 4 This is a three-dimensional schematic diagram of a dual pressure-sensitive valve.

[0021] Figure 5 This is a schematic diagram of an explosion of a dual pressure-sensitive valve.

[0022] Figure 6 A three-dimensional schematic diagram of a single pressure-sensitive valve.

[0023] Figure 7 This is a schematic diagram of an explosion of a single pressure-sensitive valve.

[0024] Figure 8 This is a three-dimensional schematic diagram of the neutral wire spring.

[0025] Figure 9 This is one of the structural schematic diagrams of the circuit breaker device of this utility model;

[0026] Figure 10 This is the second schematic diagram of the circuit breaker device of this utility model;

[0027] Figure 11 This is an exploded schematic diagram of the circuit breaker device of this utility model.

[0028] Explanation of the reference numerals in the figure:

[0029] 100. Over / under voltage surge protection module;

[0030] 110. Housing; 111. Base; 112. Rear cover; 113. Mounting bracket;

[0031] 120. Circuit board; 121. Electrode post;

[0032] 130. Surge detection mechanism; 131. Varistor; 132. Neutral wire spring; 132a. Connecting slot; 133. Live wire electrode; 133a. Lower live wire electrode; 133b. Middle live wire electrode; 133c. Upper live wire electrode; 134. Neutral wire electrode; 134a. Lower neutral wire electrode; 134b. Upper neutral wire electrode; 135. Single varistor; 136. Dual varistor; 136a. Upper varistor; 136b. Lower varistor;

[0033] 140. Warning lights;

[0034] 150. Built-in tripping mechanism;

[0035] 200. Reclosing module;

[0036] 300. Circuit breaker module;

[0037] 400, wire guide hole. Detailed Implementation

[0038] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0039] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] Examples, such as Figures 1-11 As shown, an over / under voltage surge protection module 100 includes a housing 110. A circuit board 120 and a surge detection mechanism 130 are installed in the inner cavity of the housing 110. The surge detection mechanism 130 includes a plurality of axially stacked varistor plates 131. A neutral wire spring 132 is provided on one side of the varistor plate 131. One end of the neutral wire spring 132 is fixedly connected to the housing 110, and the other end of the neutral wire spring 132 is electrically connected to each varistor plate 131.

[0043] This utility model adopts a stacked arrangement, in which three pressure-sensitive valve plates 131 are stacked and installed in the inner cavity of the 18mm thick housing 110 along the axial direction. This not only maximizes the radial dimension of each pressure-sensitive valve plate 131, enabling the over- and under-voltage surge protection module 100 to have a capacity of up to 40KA, but also keeps the thickness of the over- and under-voltage surge protection module 100 at 18mm, thus expanding the applicability of the over- and under-voltage surge protection module 100.

[0044] It should be noted that the axial direction in this utility model refers to... Figure 2 The single arrow direction in the diagram refers to the up-down direction in this invention. Figure 2 The direction of the single arrow in the image.

[0045] Specific embodiment 1, such as Figures 1-8 As shown, an over / under voltage surge protection module 100 includes a housing 110, a circuit board 120, a surge detection mechanism 130, and a built-in tripping mechanism 150.

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, the circuit board 120, surge detection mechanism 130 and built-in tripping mechanism 150 are installed in the inner cavity of the housing 110. The surge detection mechanism 130 is located on one side of the circuit board 120 and the built-in tripping mechanism 150 is located directly above the circuit board 120.

[0047] Specifically, such as Figure 1 and Figure 2 As shown, the housing 110 includes an insulating base 111 and a rear cover 112. The base 111 has an opening on one side, and the rear cover 112 is fixedly installed on the opening side of the base 111 and fixedly connected to the base 111. The base 111 and the rear cover 112 form a mounting cavity. The circuit board 120, the surge detection mechanism 130, and the built-in tripping mechanism 150 are installed in the mounting cavity. The circuit board 120 is fixedly connected to the base 111. A mounting seat 113 is integrally formed on one side of the base 111, and the surge detection mechanism 130 is installed in the mounting seat 113.

[0048] like Figure 2 and Figure 3 As shown, the surge detection mechanism 130 includes a pressure-sensitive valve plate 131 and a neutral wire spring plate 132. There are three pressure-sensitive valve plates 131, and the three pressure-sensitive valve plates 131 are stacked in the mounting base 113 along the axial direction. A live wire electrode plate 133 and a neutral wire electrode plate 134 are respectively provided at both ends of the axial direction of each pressure-sensitive valve plate 131. That is, a live wire electrode plate 133 is installed at one end of the axial direction of the pressure-sensitive valve plate 131, and a neutral wire electrode plate 134 is installed at the other end of the axial direction of the pressure-sensitive valve plate 131.

[0049] The neutral wire spring 132 is installed on one side of the mounting base 113, and one end of the neutral wire spring 132 is fixedly connected to the housing 110. The other end of the neutral wire spring 132 is connected to the neutral wire electrode 134 of each pressure-sensitive valve 131 by soldering. When the pressure-sensitive valve 131 fails, the neutral wire electrode 134 heats up and melts the solder, thereby causing the other end of the neutral wire spring 132 to detach from the pressure-sensitive valve 131.

[0050] In an alternative embodiment, such as Figure 2 , Figures 4-7 As shown, the pressure-sensitive valve 131 includes a single pressure-sensitive valve 135 and a double pressure-sensitive valve 136. The single pressure-sensitive valve 135 and the double pressure-sensitive valve 136 are stacked one on top of the other in the mounting base 113. That is, the single pressure-sensitive valve 135 is installed on the side closer to the base 111, and the double pressure-sensitive valve 136 is installed on the side closer to the rear cover 112. In the axial direction, the base 111, the single pressure-sensitive valve 135, the double pressure-sensitive valve 136 and the rear cover 112 are arranged in sequence.

[0051] like Figure 6 and Figure 7 As shown, a lower live wire electrode 133a is installed at the end of the single varistor 135 away from the double varistor 136, and a lower neutral wire electrode 134a is installed at the end of the single varistor 135 close to the double varistor 136. The lower live wire electrode 133a is used to connect to one phase live wire of the three-phase power supply, and the lower neutral wire electrode 134a is used to connect to the neutral wire.

[0052] like Figure 4 and Figure 5 As shown, the dual pressure-sensitive valve 136 includes an upper pressure-sensitive valve 136a and a lower pressure-sensitive valve 136b. The lower pressure-sensitive valve 136b is located between the upper pressure-sensitive valve 136a and the single pressure-sensitive valve 135. A mid-power electrode 133b is installed at the end of the lower pressure-sensitive valve 136b away from the upper pressure-sensitive valve 136a, and an upper power electrode 133 is provided at the end of the upper pressure-sensitive valve 136a away from the lower pressure-sensitive valve 136b. c. The intermediate live wire electrode 133b and the upper live wire electrode 133c are used to connect to the two live wires of the three-phase power supply. An upper neutral wire electrode 134b is installed between the upper varistor 136a and the lower varistor 136b, meaning that the upper varistor 136a and the lower varistor 136b share the upper neutral wire electrode 134b, and the lower neutral wire electrode 134a and the upper neutral wire electrode 134b are soldered to the neutral wire spring 132. In this way, not only can the number of neutral wire electrode pieces 134 be reduced, thus lowering production costs, but the thickness of the surge detection mechanism 130 can also be reduced, making it easier to install the surge detection mechanism 130 in the inner cavity of the housing 110, and also facilitating the fixed connection of the neutral wire electrode piece 134 to the neutral wire spring 132.

[0053] Preferred, such as Figure 3 and Figure 8 As shown, the neutral wire spring 132 is generally arc-shaped, and the radial dimension of the neutral wire spring 132 is larger than the radial dimension of the pressure-sensitive valve plate 131. One end of the neutral wire spring 132 is fixedly connected to the housing 110, and the other end of the neutral wire spring 132 is located on one side of the pressure-sensitive valve plate 131. A connection slot 132a is opened at the other end of the neutral wire spring 132. After the other end of the neutral wire spring 132 undergoes elastic deformation, it approaches the side of the pressure-sensitive valve plate 131. The lower neutral wire electrode 134a and the upper neutral wire electrode 134b of the pressure-sensitive valve plate 131 are inserted into the connection slot 132a, and the neutral wire spring 132, the lower neutral wire electrode 134a and the upper neutral wire electrode 134b are fixedly connected by soldering.

[0054] In an alternative embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, a warning light 140 is installed on one side of the housing 110, and an electrode post 121 is installed above the circuit board 120. The electrode post 121 is preferably a copper post. The electrode post 121 is located on one side of the neutral wire spring 132. After the neutral wire spring 132 is disconnected from the pressure-sensitive valve 131, it can abut against the electrode post 121 and energize the warning light 140. That is, after the other end of the neutral wire spring 132 is separated from the pressure-sensitive valve 131, the other end of the neutral wire spring 132, due to its own elasticity... Under the action of the valve, the valve moves toward the electrode post 121 until the other end of the neutral wire spring 132 abuts against the electrode post 121. The neutral wire spring 132 and the electrode post 121 are installed on the control circuit of the warning light 140. When the neutral wire spring 132 is not abutting against the electrode post 121, the warning light 140 is not powered on. After the neutral wire spring 132 abuts against the electrode post 121, the warning light 140 is powered on and illuminated to indicate that the over / under voltage surge protection module 100 is faulty and the pressure-sensitive valve 131 needs to be replaced.

[0055] Specific embodiment 2, such as Figure 9 As shown, a circuit breaker device includes the over / under voltage surge protection module 100 and the circuit breaker module 300 described above. The over / under voltage surge protection module 100 and the circuit breaker module 300 are assembled and connected, and the built-in tripping mechanism 150 of the over / under voltage surge protection module 100 is mechanically linked with the circuit breaker module 300.

[0056] In an alternative embodiment, such as Figure 10 As shown, the circuit breaker device also includes a reclosing module 200, which is assembled and connected between the over / under voltage surge protection module 100 and the circuit breaker module 300, and the reclosing module 200 and the circuit breaker module 300 are mechanically linked.

[0057] In an alternative embodiment, such as Figure 11As shown, interconnected wire passage holes 400 are provided on the over / under voltage surge protection module 100, the reclosing module 200, and the circuit breaker module 300 to facilitate the introduction of three-phase power from the circuit breaker module 300 into the over / under voltage surge protection module 100 and the reclosing module 200.

[0058] Compared with the prior art, the present invention has at least the following technical effects:

[0059] Compared to existing over / under voltage surge protection modules on the market, the over / under voltage surge protection module of this utility model has a more compact and reasonable structure, as well as a larger capacity. Whether it is assembled with a 2P circuit breaker or a 4P circuit breaker, the thickness of this over / under voltage surge protection module is 18mm.

[0060] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An over- and under-voltage surge protection module, characterized in that, The over / under voltage surge protection module (100) includes a housing (110), in which a circuit board (120) and a surge detection mechanism (130) are installed. The surge detection mechanism (130) includes a plurality of axially stacked pressure-sensitive valves (131). A neutral wire spring (132) is provided on one side of the pressure-sensitive valve (131). One end of the neutral wire spring (132) is fixedly connected to the housing (110), and the other end of the neutral wire spring (132) is electrically connected to each pressure-sensitive valve (131).

2. The under / over voltage surge protection module of claim 1, wherein, The neutral wire spring (132) is soldered to the pressure-sensitive valve plate (131).

3. The under / over voltage surge protection module of claim 2, wherein, The pressure-sensitive valve plate (131) is provided with a live wire electrode plate (133) and a neutral wire electrode plate (134) at its two axial ends.

4. The under / over voltage surge protection module of claim 3, wherein, The pressure-sensitive valve (131) includes a single pressure-sensitive valve (135) and a double pressure-sensitive valve (136) stacked vertically. A lower live wire electrode (133a) is provided at the end of the single pressure-sensitive valve (135) furthest from the double pressure-sensitive valve (136), and a lower neutral wire electrode (134a) is provided at the end of the single pressure-sensitive valve (135) closest to the double pressure-sensitive valve (136). The double pressure-sensitive valve (136) includes an upper pressure-sensitive valve (136a) and a lower pressure-sensitive valve (136b), with the lower pressure-sensitive valve (136b) located above the upper pressure-sensitive valve (136a). a) Between the lower pressure-sensitive valve (136b) and the single pressure-sensitive valve (135), a middle power line electrode (133b) is provided at the end of the lower pressure-sensitive valve (136b) away from the upper pressure-sensitive valve (136a), an upper power line electrode (133c) is provided at the end of the upper pressure-sensitive valve (136a) away from the lower pressure-sensitive valve (136b), an upper neutral line electrode (134b) is provided between the upper pressure-sensitive valve (136a) and the lower pressure-sensitive valve (136b), and the lower neutral line electrode (134a) and the upper neutral line electrode (134b) are soldered to the neutral line spring (132).

5. The under / over voltage surge protection module of claim 4, wherein, The other end of the neutral wire spring (132) is provided with a connection slot (132a), and the lower neutral wire electrode (134a) and the upper neutral wire electrode (134b) are inserted into the connection slot (132a).

6. The under / over voltage surge protection module of any of claims 2-5, wherein, A warning light (140) is installed on the housing (110), and an electrode post (121) is provided on the circuit board (120). The electrode post (121) is located on one side of the neutral wire spring (132). After the neutral wire spring (132) is disconnected from the pressure-sensitive valve plate (131), it can abut against the electrode post (121) and energize the warning light (140).

7. A circuit breaker device, characterized by The circuit breaker device includes an over / under voltage surge protection module (100) and a circuit breaker module (300) as described in any one of claims 1-6. The over / under voltage surge protection module (100) and the circuit breaker module (300) are assembled and connected, and the built-in tripping mechanism (150) of the over / under voltage surge protection module (100) is mechanically linked with the circuit breaker module (300).

8. The circuit breaker apparatus of claim 7, wherein, It also includes a reclosing module (200), which is assembled and connected between the overvoltage and undervoltage surge protection module (100) and the circuit breaker module (300), and the reclosing module (200) and the circuit breaker module (300) are mechanically linked.

9. The circuit breaker apparatus of claim 8, wherein, The over / under voltage surge protection module (100), reclosing module (200) and circuit breaker module (300) are provided with interconnected wire passage holes (400).

Images