TWI843166B - An improved device for automatically toggle interlocking modules with three switches - Google Patents

Abstract

The present invention is an improved device for the automatic toggle interlocking module of three switches, which can improve the limitation of conventional automatic toggel switches that the interlocking between circuit breakers must be of the same brand and size. The improved device of the three switches automatically switches the interlocking module, which has the function of locking and closing protection and the function of electric closing. Using the detection of the power status and the automatic blocking/closing function of the circuit breaker, the electrical and mechanical functional interlocking between the circuit breakers can be performed, and the long-distance interlocking can be performed across the switchpanel. It is easy to install and economical. Electrical safety, suitable for applications that are not limited by distance, to avoid malfunction or no action due to electrical faults. The main functions are 1) to prevent the electrical and mechanical interlocking of three circuit breakers at the same time, 2) the application of electrical and mechanical interlocking between multiple circuit breakers, and to provide an interlock with a simple structure and easy installation. The device can prevent the occurrence of malfunction and improve the safety performance of electrical equipment.

Description

Improved device for three-switch automatic switching interlocking module

The invention discloses an improved device for an automatic switching interlocking module of three switches, which can improve the conventional automatic switching switch, and the interlocking mode between the circuit breakers is not limited by the brand specifications and size. The improved device for the automatic switching interlocking module of three switches has a protection lock-on/off function and an electric closing function. The power state of the power circuit is detected and the circuit breaker automatically locks/closes. The circuit breakers can be interlocked electrically and mechanically, and It can interlock across long distances, is easy to install and economical, improves the safety of electricity use, and is suitable for applications that are not limited by distance. It avoids false operation or non-operation due to electrical faults. The main function of the invention is to prevent the electrical and mechanical interlocking of three circuit breakers at the same time, and provides a simple structure and easy installation interlocking device to prevent false operation and improve the safety performance of electrical equipment.

In the traditional technology, the interlocking method between circuit breakers in automatic switching switches, such as world-renowned brands such as Schneider and Siemens, is generally connected by a similar steel cable between the circuit breakers (the mechanism on the back of the circuit breaker locks the actuating mechanism of the circuit breaker) to achieve an interlocking relationship, so there are special requirements in specifications, models, and sizes. If they are not of the same model and specification, the interlocking function cannot be performed, and the entire set must be replaced and cannot be effectively used. This is a common problem faced by the current market.

In the conventional technology, there are occasions where circuit breakers must be interlocked. In the power circuit system, there is an interlocking requirement for power supply systems with more than two circuits, such as power interlocking between two power circuits. In order to consider the reliability and stability of the power supply quality, the above power circuit systems use multi-circuit power supply, so there must be an interlocking mechanism between circuit breakers. At present, the market generally uses automatic transfer switches (ATS) as interlocking control panels. The automatic transfer switches are large in size, expensive, and take a long time to manufacture. In addition, the circuit breakers of the device must be of the same brand, specification, size, and accessories, which results in considerable restrictions in actual use and cannot be changed. Therefore, this problem has not been solved, especially when the load changes or the equipment changes its shape and size, the existing equipment cannot be used, and the capacity equipment cannot be changed, the old and new models cannot be matched, and the on-site space cannot be coordinated..., which will cause many troubles. If there are three circuit breakers, the above difficulties cannot be overcome. Therefore, the present invention is an improved device for the automatic switching interlocking module of three switches that can be used to solve the above problems.

Furthermore, when the three circuit breakers must be in the opposite locked state, that is, the three circuit breakers have the function of interlocking, that is, only two of the three circuit breakers are allowed to be closed at the same time. If the improved device of the three switch automatic switching interlocking module of the present invention can be applied, the long-standing problem can be solved. Moreover, since the circuit breaker itself can detect the power state of the power circuit and automatically lock/close, the reliability of its power use can be improved, and the convenience and safety of use can be increased. The present invention also improves the inconvenience and shortcomings of the patent for the non-fuse switch lock device of the M318184 patent. Although it can only lock the tripped position, it meets the requirement of the lock device that must be locked when the power is off during maintenance, but it is not universally applicable to the aforementioned other different functional requirements. The function that must be interlocked cannot make the circuit breaker automatically lock/close. The present invention also improves the problem that may be caused by the electrical locking function of the locking part in the improved patent of the switch safety interlocking method. For example, the power outage, disconnection, etc. may cause the trouble of false action or no action. In the knowledge and technology, countries around the world generally use traditional locks for interlocking. Different methods require different locks and components, resulting in multiple security lock implementations, and there is no actual mechanical locking function for easy identification. This will increase production costs, increase the burden on product management, and cause trouble for owners. In the knowledge and technology, countries around the world have interlocking devices. Professional manufacturers have manufactured a kind of lock that is commonly known as Kirkey. The key in the lock is used to do the locking work. If there are two locks, only one key is placed on it. The other lock must have a key. The key must be pulled out before it can be placed on the other lock, and the key is used for control. Similarly, when there are three locks, two keys are attached, so that the locking function can be achieved by key control. Its advantages are simple universal structure and easy installation. The disadvantage is that when the spare key appears, it will cause misoperation and even industrial safety hazards. The above problems have existed for a long time, and domestic and foreign operators have not been able to properly solve these problems to improve the safety of electrical equipment and operations. The size of the circuit breaker of the general mechanical interlocking device must be the same. If the size is different, it cannot be compatible and the specifications are limited. Similarly, ATS has the same trouble. Because of the above problems, it cannot be changed and the flexibility is limited. There are problems such as mechanical devices, locks, keys, etc. that are inconvenient to manage. KerKey is managed with keys, which may cause misoperation. There is no perfect solution to the above problems, especially the inability to automatically close the circuit breaker electrically.

In the existing technology, the interlocking method between multiple circuit breakers is limited by the limitations of the circuit breaker equipment itself. For example, the two different switches of air circuit breakers and modular circuit breakers cannot be mechanically interlocked, which is difficult to implement in practice. Therefore, the current practice is to achieve the above functional requirements by controlling the programmable controller PLC. However, the programmable controller PLC itself must be powered by electricity. If it is disabled, it may not be able to operate. In addition, the electronic method is afraid of misoperation. It cannot perform the interlocking function between circuit breakers like the mechanical method. This is a common problem when executing this function. Therefore, the use of mechanical methods to perform interlocking functions between circuit breaker panels has become marketable and urgent to improve industrial safety. The improved device of the three-switch automatic switching interlocking module of the present invention can improve this deficiency.

三台斷路器之間防止三台同時投入的電氣與機械性互鎖、

多台斷路器之間的電氣與機械性互鎖應用。提供一種構造簡單、安裝方便的開關互鎖裝置，包含不同類型規格的斷路器如空氣斷路器與模殼式斷路器之間。可以全方位的使用在上述各種功能需求的解決方案，並且利用偵測電力迴路的狀態達到確實可靠的電氣與機械性方面相互結合的做法，防止誤動作的狀況產生，可以提高電氣設備使用上的安全性能。 The main purpose of the present invention is to provide an interlocking device for use between circuit breakers, a mechanical interlocking device that can achieve the function of electrical and mechanical interlocking, especially suitable for long-distance applications, to avoid erroneous operation or non-operation due to electrical faults. The main problem that can be solved is

Electrical and mechanical interlocks between the three circuit breakers to prevent all three from being switched on simultaneously.

Electrical and mechanical interlocking applications between multiple circuit breakers. Provides a switch interlocking device with simple structure and easy installation, including between circuit breakers of different types and specifications, such as air circuit breakers and modular circuit breakers. It can be used in all aspects of the above-mentioned functional requirements, and by detecting the state of the power circuit to achieve a reliable combination of electrical and mechanical aspects, prevent the occurrence of false actions, and improve the safety performance of electrical equipment.

To achieve the above purpose, the electrical and mechanical interlocking of the improved device of the three-switch automatic switching interlocking module of the present invention must be reliable and safe, and can be used in any specification, can be interlocked arbitrarily, will not cause erroneous operation, and is not limited by distance. It is best to have mechanical and electrical contacts and meet the requirements of permanent components in compliance with specifications. If the problem of being usable in any specification can be solved, the product can be standardized and standardized, and this problem has always existed in the power system and cannot be effectively solved. For the problems that cannot be overcome by the previous technology and the inconvenience in use, there is a product demand for the improved device of the three-switch automatic switching interlocking module of the present invention.

To achieve the above-mentioned purpose, the present invention provides an improved device for a three-switch automatic switching interlocking module, which can improve the conventional interlocking method of circuit breaker panels, such as using an automatic switching switch (ATS) to interlock two switches; or using a sheet metal method or a steel cable method for interlocking; two switches of the same brand, specification, and size can be interlocked and the circuit breaker structure must be destroyed, while three switches cannot interlock; and they must be placed in the same space. The present invention is not limited by brand specifications and sizes. The circuit breaker panel has a self-protection locking function and can automatically close the circuit breaker. The circuit breaker panels can be electrically and mechanically interlocked with each other. They are not limited by space and can be interlocked over long distances across panels. They are easy to install and economical. The safety of electricity use is improved and is not affected by the different items or pole numbers of the circuit breakers themselves. The purpose of solving the problem, in addition to novelty and progress, the focus of this invention must also consider marketability. In addition to the functionality of the solution, marketability also includes whether it is in an appropriate position or can comply with world regulations such as NEC, IEC, JIS, BS, CCC, CNS, etc. As mentioned above, the purpose and functionality that can be achieved by the solution method and means can meet the requirements of the regulations, so that the product will meet the market demand.

To achieve the above-mentioned purpose, an improved device of a three-switch automatic switching interlocking module is provided, which is electrically connected to a power circuit, and the power circuit has at least three circuit breakers with electric operators, each of which includes: a circuit breaker and an electric operator, the circuit breaker is connected to the power circuit, and a trip mechanism, an operating handle, a closing and opening device, and an auxiliary contact are installed inside the circuit breaker. The electric operator is connected to the operating handle to actuate the circuit breaker to close or open; it has three automatic locking modules with electric operators to prevent action, each with an electric operator circuit breaker The invention discloses an automatic locking module for preventing misoperation of a circuit breaker, comprising: a power circuit state detection device, a power circuit fault automatic locking device, and a power circuit automatic closing device; the power circuit state detection device comprises: a control circuit component for detecting the voltage signal state of the power supply side and load side contact points of the switch, the control circuit component has an electronic circuit, the electronic circuit is electrically connected to the power supply side and the load side of the circuit breaker, and a resistor voltage-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected in series is connected between each phase sequence and the ground terminal to sense the power supply side of the circuit breaker. The voltage signal on the load side sends the state signal of whether each phase sequence of the electronic circuit is energized or not to the microprocessor in the control circuit assembly. The program in the microprocessor determines and calculates the state of the internal contacts of the circuit breaker according to the voltage signal of each phase sequence on the power side and the load side of the circuit breaker under inspection, and determines whether the state of each phase contact in the circuit breaker is closed or open, and determines the abnormal state of the power side and the load side in the power circuit, such as phase loss, reverse phase, reverse power supply, high voltage, low voltage, etc.; the power circuit fault automatic locking device detects the power circuit state according to the power circuit state. When the device determines that the power circuit is in a fault state, the power circuit fault automatic locking device has a linkage mechanism that can lock the trip mechanism inside the circuit breaker, or disconnect the circuit loop of the circuit breaker with the electric operator and interconnect with the trip mechanism inside the circuit breaker to achieve the locking function; when the power circuit automatic closing device determines that the power circuit is in a normal state according to the power circuit state detection device, the circuit loop of the circuit breaker with the electric operator is turned on, so that the electric operator mechanism connects the transmission mechanism to drive the circuit breaker operating handle to close the circuit breaker; the circuit breaker with the electric operator is prevented from The false action automatic locking module is configured such that when the power circuit status detection device detects a phase loss or reverse phase power supply or other faulty power supply at the power supply side through the internal voltage sensing device, or detects a reverse phase power supply at the load side through the internal voltage sensing device, the internal circuit of the power circuit status detection device is tripped. A message is sent to drive the power circuit fault automatic locking device to start the circuit breaker, and the locking device is actuated to lock. When the power status detection device detects a no-voltage state at the load side through the internal voltage sensing device, and detects that the power circuit is positive through the internal voltage sensing device at the power supply side, In the normal state, the internal circuit of the power circuit state detection device sends a message to release the power circuit fault automatic locking device of the circuit breaker and electrically drive the electric operator device to close the circuit breaker, so as to achieve the function that the circuit breaker is automatically locked when the power circuit fails, and the circuit breaker is automatically closed and energized when the power circuit is normal; the improved device of the three-switch automatic switching interlocking module, in which two circuit breakers are when the power state detection device detects a phase loss or reverse phase power supply or other faulty power supply through the internal voltage sensing device on the power supply side, or detects a phase loss or reverse phase power supply or other faulty power supply through the internal voltage sensing device on the load side When the reverse power source is detected, the internal circuit of the power status detection device sends a message to drive the electric device to start the circuit breaker, and the locking device is actuated to lock. When the power status detection device detects a no-voltage state at the load side through the internal voltage sensing device, the internal circuit of the power status detection device sends a message to release the locking device of the circuit breaker and drive the electric device to close the circuit breaker to achieve the function of interlocking the two circuit breakers. One of the circuit breakers is electrically connected to the load side of the other two circuit breakers as a connecting switch. When the power status detection device is at the power side, When the internal voltage sensing device detects a phase loss or reverse power supply or other faulty power supply, or when the internal voltage sensing device detects a reverse power supply at the load side, the internal circuit of the power status detection device sends a message to drive the electric device to start the circuit breaker, and the locking device is actuated to lock. When the power status detection device detects a no-voltage state at the power side or the load side through the internal voltage sensing device, the internal circuit of the power status detection device sends a message to release the locking device of the circuit breaker and drive the electric device to close the circuit breaker to achieve the function of interlocking the three circuit breakers.

1: Improved device for three-switch automatic switching interlocking module

31: The first module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

32: The second module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

33: The third module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

10: Equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

11: Circuit breaker with electric operator

12: Circuit breaker

13: Electric operator

14: Escape mechanism

15: Operating handle

16: Auxiliary contact

17: Power circuit status detection device

18: Automatic locking device for power circuit fault

19: Power circuit automatic closing device

20: Circuit breaker trip button switch

21: Control circuit components

22: Power side

23: Load side

24: Electronic circuits

25: Microprocessor

[Figure 1] is a schematic diagram of an improved device of the present invention for an automatic switching interlocking module of three switches, which is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module.

[Figure 2] is a schematic diagram of the configuration of the first embodiment of an improved device for the three-switch automatic switching interlocking module of the present invention

The present invention discloses an improved device 1 for automatic switching and interlocking of three switches, which is provided with an electric operator circuit breaker to prevent misoperation and automatic locking module 10. The schematic diagram of the embodiment is shown in FIG1. The electric operator circuit breaker to prevent misoperation and automatic locking module 10 is electrically connected to a power circuit, and the power circuit has at least one electric operator circuit breaker 11. The electric operator circuit breaker 11 includes: a circuit breaker 12 and an electric operator 13. The circuit breaker 12 is connected to the power circuit. The circuit breaker 12 is internally provided with a tripping mechanism 14, an operating handle 15, and an auxiliary contact 16. The electric operator 13 is connected to the operating handle 15 to actuate the circuit breaker 12 to close or open. The circuit breaker automatic locking module 10 with the electric operator to prevent misoperation includes: a power circuit state detection device 17, a power circuit fault automatic locking device 18, and a power circuit automatic closing device 19. The power circuit state detection device 17 includes: a control circuit component 21 for detecting the circuit breaker 12. The control circuit assembly 21 includes an electronic circuit 24, which is electrically connected to the power side 22 and the load side 23 of the circuit breaker 12. A resistor voltage divider rectifier element or a voltage divider rectifier element having a plurality of resistors connected in series is connected between each phase sequence and the ground terminal to sense the voltage signal of the power side 22 and the load side 23 of the circuit breaker 12, and the state signal of whether the electronic circuit 24 is energized or not is transmitted to the circuit breaker 12. , sent to the microprocessor 25 in the control circuit assembly 21. The program in the microprocessor 25 determines and calculates the internal contact state of the circuit breaker 12 according to the voltage signal of each phase sequence of the power side 22 and the load side 23 of the circuit breaker 12 under inspection, and determines whether the state of each phase contact in the circuit breaker 12 is closed or open, and determines the abnormal state of the power side 22 and the load side 23 in the power circuit, such as phase loss, reverse phase, reverse power, high voltage, low voltage, internal contact At least one of the following: welding, etc.; when the power circuit fault automatic locking device 18 determines the power circuit fault state according to the power circuit state detection device 17, the power circuit fault automatic locking device 18 can be actuated to lock the tripping mechanism 14 inside the circuit breaker 12, or disconnect the circuit loop closed by the circuit breaker 11 with the electric operator and interconnect with the tripping mechanism 14 inside the circuit breaker 12 to achieve the locking function; the power circuit automatic closing device 19 determines the power circuit fault state according to the power circuit state detection device 17. When the power circuit is judged to be in a normal state, the circuit breaker 11 with the electric operator closes the circuit of the automatic closing device 19 of the power circuit, so that the electric operator 13 actuates the circuit breaker 12 and the operating handle 15 closes the circuit breaker 12; the automatic closing lock module 10 with the electric operator circuit breaker to prevent misoperation uses the power circuit state detection device 17 to detect a faulty power source such as a phase failure or reverse power source through the internal voltage sensing device at the power side 22, or a faulty power source such as a phase failure or reverse power source through the internal voltage sensing device at the load side 23. When the voltage sensing device detects a reverse power supply or a faulty power supply, the internal circuit device of the power loop state detection device 17 sends a message, electrically connects the power loop fault automatic locking device 18 to enable the circuit breaker 12 to be opened, and the trip mechanism 14 is actuated to be locked. When the power loop state detection device 17 detects a no-voltage state at the load side 23 end through the internal voltage sensing device, and detects a normal state of the power loop at the power side 22 end through the internal voltage sensing device, the power loop state detection device 17 The internal circuit sends a message to release the power circuit fault automatic locking device 18 of the electric operator circuit breaker automatic locking module 10 and electrically drive the electric operator 13 to link the operating handle 15 to close the circuit breaker 12, so that the circuit breaker 12 is automatically locked when the power circuit fails, and the circuit breaker 12 is automatically closed and energized by the electric operator circuit breaker automatic locking module 10 through the power circuit automatic closing device 19 when the power circuit is normal.

The first embodiment of the improved device 1 of the three-switch automatic switching interlocking module of the present invention is shown in FIG2. It is electrically connected to the power circuit. First, three identical switch modules are set up. The first module has an electric operator circuit breaker to prevent erroneous operation and automatic locking module 31, the second module has an electric operator circuit breaker to prevent erroneous operation and automatic locking module 32, and the third module has an electric operator circuit breaker to prevent erroneous operation and automatic locking module 33. The arrangement and operation principle of the three modules are as follows: first, each module is provided with an electric operator circuit breaker to prevent misoperation and automatic locking module 10, which is electrically connected to a power circuit, and the power circuit has at least one electric operator circuit breaker 11, the electric operator circuit breaker 11 includes: a circuit breaker 12 and an electric operator 13, the circuit breaker 12 is connected to the power circuit, and a trip mechanism 14 and an operating handle 15 are installed inside the circuit breaker 12. , auxiliary contact 16, circuit breaker trip button switch 20, the electric operator 13 is connected to the operating handle 15 to actuate the circuit breaker 12 to close or open; the circuit breaker automatic locking module 10 with electric operator to prevent misoperation includes: a power circuit state detection device 17, a power circuit fault automatic locking device 18, and a power circuit automatic closing device 19; the power circuit state detection device 17 includes: a control circuit component 21 for The control circuit assembly 21 includes an electronic circuit 24, which is electrically connected to the power side 22 and the load side 23 of the circuit breaker 12. A resistor voltage divider rectifier element or a plurality of resistors connected in series are connected between each phase sequence and the ground terminal to sense the voltage signal state of the power side 22 and the load side 23 of the circuit breaker 12. The voltage signal is sent to the microprocessor 25 in the control circuit assembly 21 to determine the state of the internal contacts of the circuit breaker 12 according to the voltage signal of each phase sequence of the power supply side 22 and the load side 23 of the circuit breaker 12. The state of each phase contact of the circuit breaker 12 is determined to be closed or open, and the power loop is determined. The power circuit fault automatic locking device 18 can be externally mounted above the circuit breaker trip button switch 20. According to the instruction of the power circuit state detection device 17, when a fault is detected, the power circuit fault automatic locking device 18 is actuated to link the circuit breaker trip button switch 20 to the circuit breaker. The trip mechanism 14 inside the circuit breaker 12 is locked, or the circuit closed by the circuit breaker 11 with an electric operator is disconnected to achieve the locking function, or the power circuit fault automatic locking device 18 is actuated to lock the trip mechanism 14 inside the circuit breaker 12 to achieve the locking function; when the power circuit state detection device 17 determines that the power circuit is in a normal state, the power circuit fault automatic locking device 19 first releases the power circuit fault automatic locking device 18. 8, the circuit breaker 11 with electric operator closes the circuit of the automatic closing device 19 of the power circuit, so that the electric operator 13 is connected to the operating handle 15 to actuate the circuit breaker 12 to close the circuit breaker 12; the automatic closing module 10 with electric operator circuit breaker to prevent misoperation uses the power circuit state detection device 17 to detect the power supply side 22 through the internal voltage sensing device to detect the phase failure or reverse power supply or the negative When the load side 23 end detects a reverse power supply or a faulty power supply through the internal voltage sensing device, the internal circuit of the power loop status detection device 17 sends a message, electrically connected to the power loop fault automatic locking device 18 to enable the circuit breaker 12 to be opened, and the trip mechanism 14 is actuated to be locked. When the power loop status detection device 17 detects a no-voltage state at the load side 23 end through the internal voltage sensing device, and detects a voltage state at the power side 22 end through the internal voltage sensing device When the power circuit is in a normal state, the internal circuit of the power circuit state detection device 17 sends a message to release the power circuit fault automatic locking device 18 of the automatic locking module 10 with the electric operator to prevent the circuit breaker from misoperation and electrically drive the electric operator 13 to link the operating handle 15 to close the circuit breaker 12, so that the circuit breaker 12 is automatically locked when the power circuit fails, and the circuit breaker with the electric operator prevents misoperation when the power circuit is normal. The function of the automatic locking module 10 for preventing the circuit breaker 12 from being energized automatically through the automatic closing device 19 of the power circuit; the improved device 1 for the automatic switching interlocking module of three switches, wherein the first module has the automatic locking module 31 for preventing the circuit breaker from being energized by the electric operator and the second module has the power circuit state detection device 17 inside the automatic locking module 32 for preventing the circuit breaker from being energized by the electric operator, and the detection device 17 is connected to the power supply side 22 through the internal When the internal control circuit assembly 21 detects a phase loss or reverse phase power supply or other faulty power supply, or when the power loop state detection device 17 of the internal control circuit assembly 21 detects a reverse phase power supply at the load side 23, the internal circuit of the power loop state detection device 17 sends a message to drive the power loop fault automatic locking device 18 to open the circuit breaker 12, and the power loop fault automatic locking device 18 is actuated to lock. When the power loop state detection device When the power circuit state detection device 17 of the internal control circuit assembly 21 detects a no-voltage state at the load side 23, the internal circuit of the power circuit state detection device 17 sends a message to release the locking device of the automatic locking module 10 for preventing misoperation of the circuit breaker with an electric operator and drive the automatic closing device 19 of the power circuit to close the circuit breaker 12 to achieve the automatic closing module 10 for preventing misoperation of the circuit breaker with an electric operator. The third module has an electric operator circuit breaker interlocking function, wherein the third module has an automatic closing module 33 for preventing misoperation of the electric operator circuit breaker as a contact switch. When the power circuit state detection device 17 detects a faulty power source such as a phase loss or reverse power source at the power supply side 22 through the power circuit state detection device 17 of the internal control circuit component 21, or detects a reverse power source at the load side 23 through the power circuit state detection device 17 of the internal control circuit component 21 When the power circuit state detection device 17 sends a message to drive the power circuit fault automatic locking device 18 to open the circuit breaker 12, the power circuit fault automatic locking device 18 actuates to lock and make the circuit breaker 12 of the third module with an electric operator circuit breaker to prevent misoperation of the automatic locking module 33 disconnect and lock. When the power circuit state detection device 17 is at the power side 22 end or the load side 23 end through the internal control circuit component When the power circuit state detection device 17 of 21 detects a no-voltage state, the internal circuit of the power circuit state detection device 17 sends a message to release the locking device of the circuit breaker 12 of the third module with the automatic locking module 33 for preventing misoperation of the electric operator circuit breaker and drive the power circuit to automatically close. The device 19 closes the circuit breaker 12 to achieve the function of the improved device 1 of the automatic switching interlocking module of three switches for the interlocking of the three circuit breakers.

In summary, the improved device of the three-switch automatic switching interlocking module of the present invention further improves the stability and safety of the circuit breaker panel in the power supply system, and has great industrial application. In addition, the relevant products on the market and the approved patent announcements have not been found to have the same technical features as the present invention, and it also meets the statutory patent application requirements of novelty and progress. Based on the patent application filed in accordance with the law, I sincerely request the review committee to grant the patent for this case as soon as possible to ensure the rights and interests of the applicant. However, what is disclosed in this case is only a better embodiment of the present invention, and it cannot be used to limit the scope of the rights of the present invention. All equivalent changes or modifications made according to the spirit of the present invention are still covered by the scope of the patent application of the present invention.

1: Improved device for three-switch automatic switching interlocking module

31: The first module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

32: The second module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

33: The third module is equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

10: Equipped with an electric operator circuit breaker to prevent misoperation and automatic locking module

11: Circuit breaker with electric operator

12: Circuit breaker

13: Electric operator

14: Escape mechanism

15: Operating handle

16: Auxiliary contact

17: Power circuit status detection device

18: Automatic locking device for power circuit fault

19: Power circuit automatic closing device

20: Circuit breaker trip button switch

21: Control circuit components

22: Power side

23: Load side

24: Electronic circuits

25: Microprocessor

Claims (1)

An improved device of a three-switch automatic switching interlocking module is electrically connected to a power circuit, and the power circuit has at least three circuit breakers with electric operators. The three circuit breakers with electric operators each include: a circuit breaker and an electric operator. The circuit breaker is connected to the power circuit. A trip mechanism, an operating handle, a closing and opening device, and an auxiliary contact are installed inside the circuit breaker. The electric operator is connected to the operating handle to actuate the circuit breaker to close or open. It has three automatic locking modules with electric operators to prevent the circuit breaker from operating inadvertently. The automatic closing module includes: a power circuit state detection device, a power circuit fault automatic closing device, and a power circuit automatic closing device; the power circuit state detection device includes: a control circuit component for detecting the voltage signal state of the power supply side and load side contact points of the switch, the control circuit component has an electronic circuit, the electronic circuit is electrically connected to the power supply side and the load side of the circuit breaker, and a resistor voltage-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected in series is connected between each phase sequence and the ground terminal to sense the power supply side and the load side of the circuit breaker. The voltage signal is used to send the state signal of the power or no power of each phase sequence of the electronic circuit to the microprocessor in the control circuit assembly. The program in the microprocessor determines and calculates the state of the internal contacts of the circuit breaker according to the state of the voltage signal of each phase sequence on the power side and the load side of the circuit breaker under inspection, and determines whether the state of each phase contact in the circuit breaker is closed or open, and determines the abnormal state of the power side and the load side in the power circuit, such as phase loss, reverse phase, reverse power supply, high voltage, low voltage, etc.; the power circuit fault automatic locking device determines the power circuit state detection device according to the power circuit state detection device. When the power circuit fault state is detected, the power circuit fault automatic locking device has a linkage mechanism that can lock the trip mechanism inside the circuit breaker, or disconnect the circuit loop of the circuit breaker with the electric operator and interconnect with the trip mechanism inside the circuit breaker to achieve the locking function; when the power circuit automatic closing device determines that the power circuit is in a normal state according to the power circuit state detection device, the circuit loop of the circuit breaker with the electric operator is connected, so that the electric operator mechanism connects the transmission mechanism to drive the circuit breaker operating handle to close the circuit breaker; the circuit breaker with the electric operator is prevented from being misoperated. The automatic locking module is activated. When the power loop status detection device detects a phase loss or reverse phase power or other faulty power at the power side through the internal voltage sensing device, or detects a reverse phase power at the load side through the internal voltage sensing device, the internal circuit of the power loop status detection device sends a message to drive the power loop fault automatic locking device to start the circuit breaker. The locking device is activated to lock. When the power loop status detection device detects a no-voltage state at the load side through the internal voltage sensing device, and detects the power loop at the power side through the internal voltage sensing device In a normal state, the internal circuit of the power circuit state detection device sends a message to release the power circuit fault automatic locking device of the circuit breaker and electrically drive the electric operator device to close the circuit breaker, so as to achieve the function that the circuit breaker is automatically locked when the power circuit fails, and the circuit breaker is automatically closed and energized when the power circuit is normal; the improved device of the three-switch automatic switching interlocking module, in which two circuit breakers are switched off when the power state detection device detects a phase loss or reverse phase power supply or other faulty power supply through the internal voltage sensing device on the power supply side, or when the internal voltage sensing device is detected on the load side. When the power state detection device detects the reverse power supply, the internal circuit of the power state detection device sends a message to drive the electric device to start the circuit breaker, and the locking device is actuated to lock. When the power state detection device detects the no-voltage state at the load side through the internal voltage sensing device, the internal circuit of the power state detection device sends a message to release the locking device of the switch and drive the electric device to close the circuit breaker to achieve the function of interlocking the two circuit breakers. One of the circuit breakers is electrically connected to the load side of the other two circuit breakers as a connecting switch. When the power state detection device, at the power supply When the internal voltage sensing device detects a phase loss or reverse power supply or a faulty power supply at the power supply side, or detects a reverse power supply at the load side, the internal circuit of the power status detection device sends a message to drive the electric device to start the circuit breaker, and the locking device is actuated to lock. When the power status detection device detects a no-voltage state at the power supply side or the load side through the internal voltage sensing device, the internal circuit of the power status detection device sends a message to release the locking device of the switch and drive the electric device to close the circuit breaker to achieve the interlocking function of the three circuit breakers.

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