CN209843646U - Circuit breakers with overvoltage and undervoltage protection components - Google Patents

Abstract

The utility model relates to a circuit breaker with cross undervoltage protection subassembly, it includes two at least poles of arranging in proper order in the first direction, each in two at least poles includes incoming line terminal assembly, subassembly and outgoing line terminal assembly open circuit, the circuit breaker includes at the casing with first direction vertically second direction upper extension, wherein two at least poles set up inside the casing, the integrated undervoltage protection subassembly of crossing that has two at least poles to share in the circuit breaker, wherein inside the casing, the incoming line terminal subassembly, the subassembly that opens circuit, cross undervoltage protection subassembly and the terminal assembly that is qualified for the next round of competitions is arranged in proper order in the second direction, and wherein cross the major loop that undervoltage protection subassembly electricity is connected to the circuit breaker and include electronic circuit board and cross undervoltage magnetic-out subassembly.

Description

Circuit breakers with overvoltage and undervoltage protection components

technical field

The utility model relates to a circuit breaker with overvoltage and undervoltage protection components.

Background technique

Circuit breakers are mainly used for overload and short circuit protection of lines. However, if there is an overvoltage or undervoltage fault on the line, it is necessary to take necessary protective measures to cut off the power supply quickly to ensure the safety of equipment and people. Most of the products currently used are products that combine circuit breakers with overvoltage and undervoltage protection modules. Such a product requires more lines to connect the overvoltage and undervoltage protection module to the circuit breaker, which is not conducive to user installation, and takes up a large space, increasing the cost of electrical equipment. For example, the width of the currently used circuit breaker with overvoltage and undervoltage protection functions is increased by 36mm or 18mm, which occupies a large space in the distribution box and makes the installation cost higher. In addition, currently used products do not have a digital indication module, and users cannot know in time what faults have occurred on the line.

Utility model content

The purpose of the utility model is to provide a circuit breaker with overvoltage and undervoltage protection components, which does not increase the width of the circuit breaker and has a digital indicator module, so the volume is small, the installation is simple and the cost is low.

The utility model relates to a circuit breaker with overvoltage and undervoltage protection components, comprising at least two poles arranged in sequence in a first direction, each of the at least two poles includes an incoming line terminal assembly, a circuit breaking assembly and an outgoing line terminal assembly , characterized in that,

The circuit breaker includes a housing elongated in a second direction perpendicular to the first direction, wherein at least two poles are arranged inside the housing,

The circuit breaker is integrated with at least two pole-common overvoltage and undervoltage protection components, wherein inside the housing, the incoming line terminal assembly, the circuit breaker assembly, the overvoltage and undervoltage protection assembly, and the outgoing line terminal assembly are arranged in sequence in the second direction, and wherein The overvoltage and undervoltage protection assembly is electrically connected to the main circuit of the circuit breaker and includes an electronic circuit board and an overvoltage and undervoltage magnetic release assembly.

In one embodiment, the overvoltage and undervoltage magnetic tripping assembly and the magnetic tripping assembly in the circuit breaker assembly of one of the at least two poles are arranged on a common support frame so as to be mechanically connected to the casing.

In one embodiment, the overvoltage and undervoltage coils of the overvoltage and undervoltage magnetic tripping assembly and the breaking coil of the magnetic tripping assembly in the one pole breaking assembly are arranged around a common push rod.

In one embodiment, the electronic circuit board is disposed adjacent to the overvoltage and undervoltage magnetic disconnection assembly and between the outgoing terminal assemblies of at least two poles and the overvoltage and undervoltage magnetic disconnection assembly.

In one embodiment, the circuit breaker further includes an overvoltage and undervoltage display component, which is arranged outside the housing, electrically connected to the overvoltage and undervoltage protection component, and used to display the voltage status or Voltage value.

In one embodiment, the circuit breaker further includes a breakpoint assembly arranged inside the casing, wherein when the circuit breaker is opened, the breakpoint assembly disconnects the electrical connection between the overvoltage and undervoltage protection components and the main circuit; When switching off, the breakpoint component electrically connects the overvoltage and undervoltage protection component with the main circuit.

In one embodiment, the breakpoint assembly includes an insulating drive member and a conductive elastic member movably arranged on the inner side of the housing, wherein the conductive elastic member includes a first branch and a second branch, and the first branch is electrically connected to In the overvoltage and undervoltage protection component, the conductive elastic member can electrically connect the second branch to the main circuit of the circuit breaker under the action of elastic force, so that the overvoltage and undervoltage protection component is electrically connected to the main circuit, and the insulating driving part can be in the Under the action of the moving contact bracket of the circuit breaker, the conductive elastic part is driven to move against the elastic force, so that the second branch part is away from the main circuit, thereby disconnecting the electrical connection between the overvoltage and undervoltage protection components and the main circuit.

In one embodiment, the conductive elastic member is a metal torsion spring, wherein the metal torsion spring is rotatable around a pivot shaft disposed on the housing, and the insulating driving member is disposed on the metal torsion spring.

In one embodiment, the insulating driver is a plastic sheet.

In one embodiment, the break point assembly further includes an electrical connector, and the first branch of the conductive elastic member is electrically connected to the overvoltage and undervoltage protection assembly through the electrical connector.

In one embodiment, the electrical connector includes a straight wire with an insulating sheath and a helical wire fixed to the inner side of the housing by being wound on a column inside the housing, wherein the first branch of the conductive elastic member is inserted into the helical The cavity formed by the wire is electrically connected to the helical wire, and then electrically connected to the overvoltage and undervoltage protection component through the straight wire.

Description of drawings

From the following preferred embodiments of the utility model described in detail in conjunction with the accompanying drawings, the advantages and objectives of the utility model can be better understood. In order to better show the relationship of components in the drawings, the drawings are not drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of an embodiment of a circuit breaker with an overvoltage and undervoltage protection component of the present invention, which schematically shows the position of the overvoltage and undervoltage protection component;

Fig. 2 is a schematic cross-sectional view of a pole in the circuit breaker of Fig. 1;

Fig. 3 is a partial schematic diagram of the overvoltage and undervoltage magnetic detachment assembly in the overvoltage and undervoltage protection assembly of the circuit breaker of the present invention and the magnetic detachment assembly of one pole of the circuit breaker;

Fig. 4 schematically shows the overvoltage and undervoltage display assembly of the circuit breaker of the present invention;

Fig. 5 schematically shows a cross-sectional view of another embodiment of a circuit breaker with overvoltage and undervoltage protection components of the present invention, wherein the breakpoint component included in the circuit breaker is electrically disconnected from the main circuit of the circuit breaker;

Figure 6 schematically shows a cross-sectional view of the circuit breaker when the breakpoint assembly of Figure 5 is electrically connected to the main circuit; and

Fig. 7 schematically shows the metal torsion spring and electrical connectors in one embodiment of the circuit breaker of the present invention.

Detailed ways

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are assigned to components having substantially the same or similar structures and functions, and repeated descriptions about them will be omitted. If not specifically stated, the terms "first direction", "second direction" and the like herein are all described relative to the drawings of the present utility model. The term "A, B, C, etc. arranged in sequence" only indicates the arrangement order of components A, B, C, etc., and does not exclude the possibility of including other components between A and B and/or between B and C. The descriptions of "first" and "second" are only for distinguishing the parts, and do not limit the scope of the present utility model. Without departing from the scope of the present utility model, the "first part" can be written as "the second part".

The accompanying drawings in this specification are schematic diagrams, which assist in explaining the concept of the utility model, and schematically represent the interrelationships of various parts.

Next, referring to Fig. 1 to Fig. 7, a preferred embodiment according to the present utility model will be described in detail.

Fig. 1 shows an embodiment of the circuit breaker with overvoltage and undervoltage protection components of the present invention. As shown in FIG. 1 , the circuit breaker 100 includes a first pole 1 and a second pole 2 arranged sequentially in a first direction, and each pole has a width of 18 mm in a first direction x. The circuit breaker 100 also includes a casing 3 elongated in a second direction y perpendicular to the first direction, wherein the first pole 1 and the second pole 2 are arranged inside the casing 3 . In addition, the circuit breaker 100 is integrated with an overvoltage and undervoltage protection component 4 shared by the first pole 1 and the second pole 2. The overvoltage and undervoltage protection component 4 is electrically connected to the main circuit of the circuit breaker and includes an electronic circuit board 5 and an overvoltage and undervoltage protection component 4. Magnetic detachment assembly 6.

The circuit breaker of the present invention is not limited to include only two poles, for example, the circuit breaker may also include three or four poles.

Compared with conventional circuit breakers, the length of the casing in the second direction of the utility model is only slightly increased, while the width of the casing in the first direction remains unchanged. For example, the circuit breaker of the present invention with two poles has a width of 36mm in the first direction.

FIG. 2 shows a schematic cross-sectional view of the first pole 1 of the circuit breaker of FIG. 1 . As shown in FIG. 2 , inside the casing 3 , the incoming line terminal assembly 7 , the circuit breaker assembly 8 , the overvoltage and undervoltage protection assembly 4 and the outgoing line terminal assembly 9 of the first pole 1 are arranged sequentially in the second direction y. Similarly, the incoming line terminal assembly, the circuit breaker assembly, the overvoltage and undervoltage protection assembly and the outgoing line terminal assembly of the second pole 2 are also arranged in sequence in the second direction y.

The overvoltage and undervoltage magnetic disconnection assembly 6 shown in Figures 1 and 2 is arranged adjacent to the outgoing line terminal assembly 9, but the utility model is not limited thereto, and the overvoltage and undervoltage magnetic disconnection assembly can be arranged in other suitable places in the elongated housing 3 at the location.

The electronic circuit board 5 is used to detect the voltage signal in the main circuit of the circuit breaker, and is electrically connected to the overvoltage and undervoltage magnetic disconnection assembly 6 . For example, in FIGS. 1 and 2 , in the second direction y, the electronic circuit board 5 is arranged adjacent to the overvoltage and undervoltage magnetic disconnection assembly 6 and between the outgoing terminals 9 of two poles and the overvoltage and undervoltage magnetic disconnection assembly 6 . The position of the electronic circuit board 6 in the utility model is not limited to that shown in Figures 1 and 2, the electronic circuit board can be located in other positions in the extended housing 3, and can be electrically connected with the overvoltage and undervoltage magnetic detachment assembly 6 through wires .

The breaking components of the first pole and the second pole include, for example, a thermal disconnection component and a magnetic disconnection component. In addition, the circuit breaking assembly also includes mechanical locking handle devices, contact systems, arc extinguishing systems, etc.

For example, thermal breakout assemblies include bimetallic strips that bend when overloaded. For example, the magnetic decoupling assembly includes coil, iron core, spring and push rod.

Fig. 3 shows a partial schematic diagram of the overvoltage and undervoltage magnetic disconnection assembly in the overvoltage and undervoltage protection assembly of the circuit breaker of the present invention and the magnetic disconnection assembly of one pole of the circuit breaker. As shown in FIG. 3 , the overvoltage and undervoltage magnetic disconnection assembly 6 and the magnetic disconnection assembly in the circuit breaker assembly 8 of the first pole 1 of the circuit breaker are arranged on a common support frame 31, which is a part of the housing or It is arranged inside the casing, so that the overvoltage and undervoltage magnetic release assembly is mechanically connected to the casing. In addition, the overvoltage and undervoltage coils of the overvoltage and undervoltage magnetic disconnection assembly 6 (which are not shown in FIG. 3 due to packaging) and the disconnection coil 10 of the magnetic disconnection assembly 8 of the first pole 1 wind a common push rod 11 set up. The overvoltage and undervoltage magnetic tripping assembly 6 and the magnetic tripping assembly 8 of the first pole 1 respectively include their own iron cores, return springs and the like.

The electronic circuit board 5 includes, for example, a signal detection unit and a micro control unit. The signal detection unit detects the voltage signal in the main circuit of the circuit breaker, and the micro control unit processes and judges the detected voltage signal. When the signal detection unit detects an overvoltage signal or an undervoltage signal, the micro-control unit sends a tripping signal to the overvoltage and undervoltage magnetic release assembly 6, and the overvoltage and undervoltage magnetic release assembly 6 moves the push rod in response to the tripping signal. Prompt the circuit breaker to open, so as to realize the overvoltage and undervoltage protection of the circuit breaker. After the voltage returns to normal, the overvoltage and undervoltage magnetic release assembly 6 can automatically reset under the action of the return spring to connect the circuit.

Fig. 4 schematically shows the overvoltage and undervoltage display assembly 12 of the circuit breaker of the present invention. The overvoltage and undervoltage display component 12 is arranged on the outside of the casing 3 and is electrically connected with the overvoltage and undervoltage protection component 4 for displaying the voltage status or voltage value in the main circuit of the circuit breaker.

For example, the overvoltage and undervoltage display component 12 may be an indicator light. When the signal detection unit of the electronic circuit board 5 detects an overvoltage signal or an undervoltage signal, the indicator light is on. When the voltage of the circuit returns to normal, the indicator light goes out.

For example, the overvoltage and undervoltage display component 12 can be a digital display module, which is used to display the voltage value in the circuit in real time.

By integrating the overvoltage and undervoltage protection module in the circuit breaker and making the magnetic trip assembly of one pole of the circuit breaker share the support mechanism and push rod with the overvoltage and undervoltage magnetic trip assembly, the circuit breaker of the utility model can be used without increasing the width. , with only a small increase in length, resulting in significantly smaller volume, simple installation and low cost. In addition, by setting an intelligent display module, the circuit breaker of the utility model can display in real time whether a fault occurs in the circuit and what kind of fault occurs, and has high practicability.

5 and 6 both show parts of another embodiment of the circuit breaker with overvoltage and undervoltage protection components of the present invention. As shown in FIGS. 5 and 6 , the circuit breaker also includes a breaking point assembly 13 disposed inside the casing 3 . In FIG. 5 , the circuit breaker is opened. At this time, the breakpoint assembly 13 is not in contact with the main circuit of the circuit breaker, so that the electrical connection between the overvoltage and undervoltage protection assembly 4 of the circuit breaker and the main circuit of the circuit breaker is disconnected. In FIG. 6 , the circuit breaker is closed, and at this time, the breakpoint component 13 is in contact with the main circuit of the circuit breaker, so that the overvoltage and undervoltage protection component 4 is electrically connected to the main circuit.

The breaking point assembly 13 includes an insulating driving member 14 and a conductive elastic member 15 movably arranged on the inner side of the housing. For example, as shown in Figures 5-7, the conductive elastic member 15 is a metal torsion spring, and the insulating driving member 14 is a plastic sheet, wherein the metal torsion spring is rotatable around a pivot shaft 32 arranged on the housing 3, and the insulating driving member 14 is a plastic sheet. 14 is arranged on the metal torsion spring.

The breakpoint component of the present invention is not limited to the above embodiments. For example, the conductive elastic member can also be a metal spring.

As shown in FIGS. 5-7 , the conductive elastic member 15 includes a first branch portion 16 and a second branch portion 17 . The first branch portion 16 is electrically connected to the overvoltage and undervoltage protection component 4 . For example, as shown in Figure 7, the breakpoint assembly 13 also includes an electrical connector 19, which includes a straight wire 21 with an insulating sheath and a wire that is fixed on the inside of the housing by being wound on a column inside the housing. Helical wire 22. The helical wire 22 has no insulation. In addition, the first branch 16 of the metal torsion spring 15 is electrically connected to the helical wire 22 by being inserted into the cavity 20 formed by the helical wire 22 , and then electrically connected to the overvoltage and undervoltage protection component 4 through the straight wire 21 .

As shown in FIG. 6 , the metal torsion spring 15 can electrically connect the second branch portion 17 to the main circuit of the circuit breaker under the action of its elastic force.

As shown in Figure 5, the insulating driving part 14 can drive the metal torsion spring 15 to move against the elastic force under the action of the moving contact bracket 18 of the circuit breaker, so that the second branch 17 of the metal torsion spring is away from the main circuit, thereby breaking Open the electrical connection between the undervoltage protection component 4 and the main circuit.

The following explains how the breakpoint component realizes the protection of the overvoltage and undervoltage protection component in conjunction with Figure 5-6.

When the circuit breaker is switched from the closed state to the open state, as shown in Figure 5, the movable contact bracket 18 contacts the insulating driving part 14 and causes the insulating driving part to drive the metal torsion spring to rotate clockwise around the pivot shaft 32, so that The second branch 17 of the metal torsion spring 15 moves away from the main circuit from the on position to the off position. At this time, the electrical connection between the undervoltage protection component 4 of the circuit breaker and the main circuit of the circuit breaker is disconnected.

When the circuit breaker is switched from the open state to the closed state, as shown in Figure 6, the movable contact bracket 18 is away from the insulating drive member 14, and the metal torsion spring 15 rotates counterclockwise around the pivot shaft 32 under the action of its elastic force. , so that the second branch portion 17 of the metal torsion spring 15 returns from the off position to the on position. At this time, the breakpoint assembly 13 electrically connects the overvoltage and undervoltage protection assembly 4 with the main circuit of the circuit breaker.

Through the above-mentioned breakpoint components, when the circuit breaker is closed, the overvoltage and undervoltage protection components are electrically connected to the main circuit of the circuit breaker, and thus work normally, providing overvoltage and undervoltage protection for the circuit breaker; The protection component is electrically disconnected from the main circuit so that it will not be burned due to continuous action. In this way, for example, when the operator mistakenly uses the outgoing line terminal as the incoming line terminal, the above-mentioned breakpoint component can disconnect the electrical connection between the overvoltage and undervoltage protection component and the main circuit, thereby avoiding the overvoltage and undervoltage protection from being burned due to the inability to disconnect the electrical connection. components.

The technical features disclosed above are not limited to the disclosed combination with other features, and those skilled in the art can also make other combinations among the technical features according to the purpose of the utility model, so as to achieve the purpose of the utility model.

Claims (11)

1. A circuit breaker with overvoltage and undervoltage protection components, comprising at least two poles arranged in sequence in the first direction, each of the at least two poles includes an incoming line terminal assembly, a circuit breaker assembly and an outgoing line terminal assembly, which characterized in that, The circuit breaker includes a housing elongated in a second direction perpendicular to the first direction, wherein at least two poles are arranged inside the housing, The circuit breaker is integrated with at least two pole-common overvoltage and undervoltage protection components, wherein inside the housing, the incoming line terminal assembly, the circuit breaker assembly, the overvoltage and undervoltage protection assembly, and the outgoing line terminal assembly are arranged in sequence in the second direction, and wherein The overvoltage and undervoltage protection assembly is electrically connected to the main circuit of the circuit breaker and includes an electronic circuit board and an overvoltage and undervoltage magnetic release assembly. 2. The circuit breaker according to claim 1, characterized in that, the over- and under-voltage magnetic disconnection assembly and the magnetic disconnection assembly in the circuit breaker assembly of one pole in at least two poles are arranged on a common support frame to be mechanically connected to the housing. 3 . The circuit breaker according to claim 2 , wherein the overvoltage and undervoltage coils of the overvoltage and undervoltage magnetic tripping assemblies and the tripping coils of the magnetic tripping assemblies in the one-pole tripping assembly are arranged around a common push rod. 4 . 4 . The circuit breaker according to claim 1 , wherein the electronic circuit board is disposed adjacent to the overvoltage and undervoltage magnetic disconnection assembly and between the outlet terminal assemblies of at least two poles and the overvoltage and undervoltage magnetic disconnection assembly. 5. The circuit breaker according to claim 1, characterized in that, the circuit breaker further comprises an overvoltage and undervoltage display assembly, the overvoltage and undervoltage display assembly is arranged on the outside of the housing, electrically connected to the overvoltage and undervoltage protection assembly, and It is used to display the voltage state or voltage value in the main circuit. 6. The circuit breaker according to claim 1, characterized in that, the circuit breaker also includes a breakpoint assembly arranged inside the housing, wherein when the circuit breaker is opened, the breakpoint assembly makes the overvoltage and undervoltage protection assembly and the main circuit The electrical connection of the circuit breaker is disconnected; when the circuit breaker is closed, the break point component electrically connects the overvoltage and undervoltage protection component with the main circuit. 7. The circuit breaker according to claim 6, characterized in that, the breaking point assembly comprises an insulating drive part and a conductive elastic part which are movably arranged on the inside of the housing, wherein the conductive elastic part comprises a first branch part and a second branch part. Branches, the first branch is electrically connected to the overvoltage and undervoltage protection component, and the conductive elastic member can electrically connect the second branch to the main circuit of the circuit breaker under the action of elastic force, so that the overvoltage and undervoltage protection component and the main circuit Electrical connection, and the insulating driving part can drive the conductive elastic part to move against the elastic force under the action of the moving contact bracket of the circuit breaker, so that the second branch is far away from the main circuit, thereby disconnecting the overvoltage and undervoltage protection component from the main circuit electrical connection. 8. The circuit breaker according to claim 7, wherein the conductive elastic member is a metal torsion spring, wherein the metal torsion spring is rotatable around a pivot shaft arranged on the housing, and the insulating driving member is arranged on the metal torsion spring. sprung. 9. A circuit breaker as claimed in claim 7 or 8, characterized in that the insulating drive member is a plastic sheet. 10 . The circuit breaker according to claim 7 , wherein the break point assembly further comprises an electrical connector, and the first branch of the conductive elastic member is electrically connected to the overvoltage and undervoltage protection assembly through the electrical connector. 11 . 11. The circuit breaker according to claim 10, wherein the electrical connector comprises a straight wire with an insulating sheath and a helical wire fixed to the inner side of the housing by being wound on a column inside the housing, wherein the conductive The first branch of the elastic member is inserted into the cavity formed by the helical wire to be electrically connected to the helical wire, and then electrically connected to the overvoltage and undervoltage protection component through the straight wire.