A small intelligent circuit breaker with reclosing function

Abstract

The present invention discloses a small intelligent circuit breaker with a reclosing function, comprising a housing, inlet and outlet terminals installed at both ends of the length of the housing, and a moving contact, a static contact, an electric control component, an electronic release, and a lock release mechanism installed in the housing; the moving contact and the static contact are installed and matched in the middle position in the housing; the inlet terminal is electrically connected to the static contact, and the outlet terminal is electrically connected to the moving contact; the electric control component is installed at a position close to the outlet terminal; the circuit breaker also includes an electric signal taking line for monitoring the voltage of the power grid; one end of the electric signal taking line is connected to the electrical connection path between the inlet terminal and the static contact in the housing, and the other end of the electric signal taking line is connected to the electric control component; the middle part from one end to the other end of the electric signal taking line is arranged outside the housing. The present invention can avoid the disadvantage of the electric arc generated by the moving and static contacts burning the electric signal taking line, and has the characteristics of easy assembly and high degree of automation.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a small intelligent circuit breaker with a reclosing function. Background Art

[0002] A circuit breaker is a switch device that can close, carry and break the current under normal circuit conditions and can close, carry and break the current under abnormal circuit conditions within a specified time. Intelligent circuit breaker is a type of circuit breaker. Intelligent circuit breaker uses microelectronics, computer technology and new sensors to establish a new circuit breaker secondary system. During the use of intelligent circuit breakers, the mechanism is always in the pre-energy storage position. As long as the circuit breaker receives a closing command, the circuit breaker can be closed instantly. Intelligent circuit breaker is an intelligent control unit introduced on the basis of existing circuit breakers. It consists of three basic modules: data acquisition, intelligent identification and adjustment device. The intelligent identification module is the core of the intelligent control unit. The microcomputer control system composed of a microprocessor can automatically identify the grid working state of the circuit breaker during operation according to the grid information collected before the operation and the operation signal sent by the main control room, determine the appropriate opening and closing movement characteristics according to the results of the circuit breaker simulation analysis, and send adjustment information to the actuator. After the adjustment is completed, the opening and closing signal is sent. The prior art intelligent circuit breaker usually connects an electric signal wire to the electric control component in the connection path from the incoming terminal to the static contact, so that the electric control component can monitor the voltage signal of the power grid. When the power grid voltage is in an abnormal condition such as overvoltage or undervoltage, the electric control component can control the electric operating device to realize remote opening and closing. In the prior art intelligent circuit breaker, the electric signal wire is installed in the housing. Since the electric control component is usually installed near the outgoing terminal, the electric signal wire will inevitably pass through the matching area of ​​the moving and static contacts when it is routed in the housing. In this way, the electric arc generated by the moving and static contacts can easily burn the electric signal wire, making the electric signal wire unusable. At the same time, it also causes the disadvantages of inconvenient assembly and low degree of automation. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a small intelligent circuit breaker with a reclosing function. Through structural improvement, the disadvantage of the electric arc generated by the moving and static contacts burning the electric signal taking wires can be avoided, and the invention has the characteristics of easy assembly and high degree of automation.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a small intelligent circuit breaker with a reclosing function, comprising a housing, inlet and outlet terminals installed at both ends of the length of the housing, and a moving contact, a static contact, an electric control component, an electronic release and a lock release mechanism installed in the housing; the moving contact and the static contact are installed and matched in the middle position of the housing; the inlet terminal is electrically connected to the static contact through the electronic release, the outlet terminal is electrically connected to the moving contact, and the moving contact is linked to the lock release mechanism; the electric control component is installed near the housing The circuit breaker further comprises an electric signal taking wire for monitoring the grid voltage, one end of the electric signal taking wire is connected to the electrical connection path between the incoming terminal and the static contact in the shell, and the other end of the electric signal taking wire is connected to the electric control component; the middle part from one end to the other end of the electric signal taking wire is arranged outside the shell, so as to utilize the shell wall to block the matching area between the electric signal taking wire and the moving contact and the static contact, so as to avoid the electric arc generated by the moving and static contacts from burning the electric signal taking wire.

[0005] A first through hole is provided in the shell wall on one side of the thickness of the shell at the connection between one end of the electric signal taking-in wire and the electrical connection path between the incoming terminal and the stationary contact, and a second through hole is provided at the connection between the other end of the electric signal taking-in wire and the electrical control component. The two ends of the electric signal taking-in wire are connected to the electrical connection path between the incoming terminal and the stationary contact and the electrical control component outside the shell through the first through hole and the second through hole respectively.

[0006] The electrical signal taking wire is a hard conductive strip, both ends of which are bent and inserted into the corresponding first through hole and second through hole, and are respectively connected to the electrical connection path between the incoming terminal and the static contact and the electrical control component.

[0007] The two ends of the electrical signal taking wire are interference fit with the first through hole and the second through hole.

[0008] A concave channel is provided between the first through hole and the second through hole in the shell wall of one side of the thickness of the shell, and the middle part from one end to the other end of the electrical signal taking line is embedded in the concave channel.

[0009] The electronic release comprises a yoke, the yoke is connected to the electrical connection path between the incoming terminal and the static contact, and one end of the electrical signal taking line is electrically connected to the yoke.

[0010] The electronic release is located at the upper part of the shell and is biased towards the incoming terminal in the length direction of the shell; the electric control component is located at the bottom of the shell; the middle part of the electrical signal taking line is provided with multiple bends to bend from the upper part of one side of the length of the shell to the bottom of the other side of the length of the shell.

[0011] The yoke is provided with a small slot, and one end of the electric signal taking wire matches with the small slot of the yoke; the electric control component includes a circuit board, and the other end of the electric signal taking wire is plugged into the circuit board.

[0012] The incoming terminal and the outgoing terminal are also provided with temperature sensors respectively, and the outputs of the temperature sensors of the incoming terminal and the outgoing terminal are respectively connected to the MCU in the electric control component.

[0013] The circuit breaker further comprises a current detection component, the outlet terminal is sleeved in the current detection component, and the current detection component is a current transformer or a Hall sensor.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The present invention connects one end of the electric signal wire to the electrical connection path between the incoming terminal and the static contact in the shell, and connects the other end of the electric signal wire to the electric control component; the middle part from one end to the other end of the electric signal wire is arranged outside the shell, so as to use the shell wall to block the matching area between the electric signal wire and the moving contact and the static contact, so as to avoid the electric arc generated by the moving and static contacts from burning the electric signal wire. The present invention arranges the middle part of the electric signal wire used to monitor the grid voltage outside the shell, avoiding the matching area of ​​the moving contact and the static contact, so that the electric arc generated by the moving and static contacts cannot affect the electric signal wire, ensuring the effective monitoring of the grid voltage by the electric signal wire, and has the characteristics of easy assembly and high degree of automation.

[0016] 2. Since the present invention adopts temperature sensors installed on the incoming terminal and the outgoing terminal respectively, the two temperature sensors can be used to monitor the temperature of the two wiring terminals, thereby ensuring the normal use of the circuit breaker.

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the small intelligent circuit breaker with a reclosing function of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view of an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional shape of an embodiment of the present invention (the electric signal taking wire is ready to be inserted);

[0020] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0021] Figure 4is a front view of an embodiment of the present invention (without the front housing);

[0022] Figure 5 It is a three-dimensional schematic diagram of the state in which the electric signal taking wire, the electronic trip device and the electric control component cooperate with each other in an embodiment of the present invention;

[0023] Figure 6 It is a front view of the state in which the electric signal taking wire, the electronic release and the electric control component cooperate with each other in the embodiment of the present invention. DETAILED DESCRIPTION

[0024] Example

[0025] See also Figures 1 to 6 As shown, a small intelligent circuit breaker with a reclosing function of the present invention comprises a housing 1, an incoming terminal 21 and an outgoing terminal 22 installed at both ends of the length of the housing, and a moving contact 31, a stationary contact 32, an electronic release 4, a lock and release mechanism 5 and an electric control component 6 installed in the housing 1; the housing 1 is composed of a front housing 11 and a rear housing 12, and the front housing 11 and the rear housing 12 are fixed together to form a cavity for installing the moving contact 31, the stationary contact 32, the electronic release 4, the lock and release mechanism 5 and the electric control component 6; the moving contact 31 and the stationary contact 32 are installed and matched in the middle position of the housing 1; the incoming terminal 21 is electrically connected to the stationary contact 32 through the electronic release 4, and the outgoing terminal 22 is electrically connected to the moving contact 31. The moving contact 31 is linked with the lock release mechanism 5; the electric control component 6 is installed at a position close to the outlet terminal 22; the circuit breaker also includes an electric signal wire 7 for monitoring the grid voltage, one end 71 of the electric signal wire 7 is connected to the electrical connection path between the incoming terminal 21 and the static contact 32 in the shell 1, and the other end 72 of the electric signal wire 7 is connected to the electric control component 6; the middle part 73 from one end 71 to the other end 72 of the electric signal wire 7 is arranged outside the shell 1, so as to use the shell wall of the shell 1 to block the matching area between the electric signal wire 7 and the moving contact 31 and the static contact 32, so as to avoid the arc generated by the moving and static contacts from burning the electric signal wire.

[0026] This embodiment is a single-pole circuit breaker, and can also be applied to a multi-pole circuit breaker.

[0027] In this embodiment, a first through hole 13 is provided in the shell wall on one side of the thickness of the shell 1, i.e., the front shell 11, at the connection position of one end of the electric signal taking-in wire 7 and the electric connection path between the incoming terminal 21 and the static contact 32, and a second through hole 14 is provided at the connection position of the other end of the electric signal taking-in wire 7 and the electric control component 8. The two ends of the electric signal taking-in wire 7 are connected to the electric connection path between the incoming terminal 21 and the static contact 32 and the electric control component 6 outside the shell 1 through the first through hole 13 and the second through hole 14 respectively.

[0028] In this embodiment, the electrical signal collecting wire 7 is a hard conductive strip, one end 71 of the hard conductive strip 7 is bent and inserted into the first through hole 13 to be connected to the electrical connection path between the incoming terminal 21 and the static contact 32, and the other end 72 of the hard conductive strip 7 is bent and inserted into the second through hole 14 to be connected to the electronic control component.

[0029] In this embodiment, two ends of the electrical signal taking line 7 are interference fit with the first through hole 13 and the second through hole 14 .

[0030] In this embodiment, a recess 15 is provided between the first through hole 13 and the second through hole 14 in the shell wall of one side of the thickness of the shell 1, i.e., the front shell 11, and the middle part 73 from one end 71 to the other end 72 of the electrical signal taking line 7 is embedded in the recess 15.

[0031] In this embodiment, the electronic release 4 includes a yoke 41 , the yoke 41 is connected to the electrical connection path between the incoming terminal 21 and the static contact 32 , and one end of the electrical signal taking line 7 is electrically connected to the yoke 41 .

[0032] In this embodiment, the electronic release 4 is located at the upper part of the shell 1 and is biased towards the incoming terminal 21 in the length direction of the shell 1; the electronic control component 6 is located at the bottom of the shell 1; the middle part of the electrical signal taking line 7 is provided with multiple bends to bend from the upper part of one side of the length of the shell to the bottom of the other side of the length of the shell.

[0033] The limitations of the upper and lower directions in the present invention only indicate the relative positional relationship between components or structures in the components, and the length of the housing refers to the dimension from the inlet to the outlet of the single-pole circuit breaker.

[0034] In this embodiment, the yoke 41 is provided with a small slot 411, and one end 71 of the electrical signal taking-in wire 7 cooperates with the small slot 411 of the yoke 4; the electric control component 6 includes a circuit board 61, and the other end 72 of the electrical signal taking-in wire 7 is plugged into the circuit board 61.

[0035] In this embodiment, the input terminal 21 and the output terminal 22 are respectively provided with a temperature sensor 81 , and the outputs of the temperature sensors 81 of the input terminal 21 and the output terminal 22 are respectively connected to the MCU in the electric control component 6 .

[0036] In this embodiment, the circuit breaker also includes a current detection component. The current detection component in this embodiment is a Hall sensor 82. The output terminal 22 is inserted into the middle of the magnetic ring 821 of the Hall sensor 82. The Hall sensor 82 consists of the magnetic ring 821 and the Hall element 822. The output of the Hall element 822 is connected to the MCU in the electronic control component 6.

[0037] In this embodiment, the circuit breaker also includes a handle 83 and an arc extinguishing chamber 84. The handle 83 is installed in the middle of the top of the housing 1. The handle 83 is connected to the lock release mechanism 5 through a connecting rod 85. The arc extinguishing chamber 84 is installed in the housing 1 and is located below the electronic release 4.

[0038] The present invention is a small intelligent circuit breaker with a reclosing function, which adopts the method of connecting one end 71 of the electric signal wire 7 to the electrical connection path between the incoming terminal 21 and the static contact 32 in the housing 1, and connecting the other end 72 of the electric signal wire 7 to the electric control component 6; the middle part 73 from the one end 71 to the other end 72 of the electric signal wire 7 is arranged outside the housing 1, so as to use the shell wall of the housing 1 to block the matching area between the electric signal wire 7 and the moving contact 31 and the static contact 32, so as to avoid the electric arc generated by the moving and static contacts from burning the electric signal wire. The present invention arranges the middle part of the electric signal wire used to monitor the grid voltage outside the housing, avoiding the matching area of ​​the moving contact and the static contact, so that the electric arc generated by the moving and static contacts cannot affect the electric signal wire, ensuring the effective monitoring of the grid voltage by the electric signal wire, and has the characteristics of easy assembly and high degree of automation.

[0039] A small intelligent circuit breaker with a reclosing function of the present invention adopts temperature sensors 81 installed on the incoming terminal 21 and the outgoing terminal 22 respectively. The two temperature sensors 81 can be used to monitor the temperature of the two terminals, thereby ensuring the normal use of the circuit breaker.

[0040] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A small intelligent circuit breaker with a reclosing function, comprising a housing, an incoming terminal and an outgoing terminal installed at both ends of the length of the housing, and a moving contact, a static contact, an electric control component, an electronic release, and a lock release mechanism installed in the housing; the moving contact and the static contact are installed and matched in the middle position of the housing; the incoming terminal is electrically connected to the static contact through the electronic release, the outgoing terminal is electrically connected to the moving contact, and the moving contact is linked to the lock release mechanism; the electric control component is installed at a position close to the outgoing terminal; the circuit breaker also includes an electric signal acquisition line for monitoring the grid voltage; characterized in that: One end of the electrical signal wire is connected to the electrical connection path between the incoming terminal and the static contact in the shell, and the other end of the electrical signal wire is connected to the electronic control component; the middle part from one end to the other end of the electrical signal wire is arranged outside the shell, so as to use the shell wall to block the electrical signal wire and the matching area between the moving contact and the static contact, so as to avoid the arc generated by the moving and static contacts from burning the electrical signal wire.

2. The small intelligent circuit breaker with reclosing function according to claim 1 is characterized in that: A first through hole is provided in the shell wall on one side of the thickness of the shell at the connection between one end of the electric signal taking-in wire and the electrical connection path between the incoming terminal and the stationary contact, and a second through hole is provided at the connection between the other end of the electric signal taking-in wire and the electrical control component. The two ends of the electric signal taking-in wire are connected to the electrical connection path between the incoming terminal and the stationary contact and the electrical control component outside the shell through the first through hole and the second through hole respectively.

3. The small intelligent circuit breaker with reclosing function according to claim 2 is characterized in that: The electrical signal taking wire is a hard conductive strip, both ends of which are bent and inserted into the corresponding first through hole and second through hole, and are respectively connected to the electrical connection path between the incoming terminal and the static contact and the electrical control component.

4. The small intelligent circuit breaker with reclosing function according to claim 3 is characterized in that: The two ends of the electrical signal taking wire are interference fit with the first through hole and the second through hole.

5. The small intelligent circuit breaker with reclosing function according to claim 3 is characterized in that: A concave channel is provided between the first through hole and the second through hole in the shell wall of one side of the thickness of the shell, and the middle part from one end to the other end of the electrical signal taking line is embedded in the concave channel.

6. The small intelligent circuit breaker with reclosing function according to claim 3 or 4, characterized in that: The electronic release comprises a yoke, the yoke is connected to the electrical connection path between the incoming terminal and the static contact, and one end of the electrical signal taking line is electrically connected to the yoke.

7. The small intelligent circuit breaker with reclosing function according to claim 6 is characterized in that: The electronic release is located in the upper part of the housing and is biased towards one side of the incoming terminal in the length direction of the housing; The electric control component is located at the bottom of the shell; the middle part of the electric signal taking line is provided with multiple bends to bend from the upper part of one side of the shell length to the bottom of the other side of the shell length.

8. The small intelligent circuit breaker with reclosing function according to claim 7 is characterized in that: The yoke is provided with a small slot, and one end of the electrical signal receiving wire matches with the small slot of the yoke; The electric control component comprises a circuit board, and the other end of the electric signal taking line is plugged into the circuit board.

9. The small intelligent circuit breaker with reclosing function according to claim 1, characterized in that: The incoming terminal and the outgoing terminal are also provided with temperature sensors respectively, and the outputs of the temperature sensors of the incoming terminal and the outgoing terminal are respectively connected to the MCU in the electric control component.

10. The small intelligent circuit breaker with reclosing function according to claim 1, characterized in that: The circuit breaker further comprises a current detection component, the outlet terminal is sleeved in the current detection component, and the current detection component is a current transformer or a Hall sensor.

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