TWM653443U - Low voltage switch automatic interlock controller - Google Patents

Abstract

This invention relates to a low-voltage switch automatic interlock controller, which aims to improve the stability of the existing power circuit to achieve a stable power supply quality. Additionally, it combines the function of power load distribution. This is achieved by supplying power through multiple power source circuits and utilizing interlock functions between multiple switches. However, it also aims to prevent accidents caused by unintentional closure of non-set operating switches.

Traditionally, it is known that low-voltage switches from the same brand and of the same size and model are interlocked. Whether it is interlocking with iron rods or steel cables for low-voltage air circuit breakers, the distance between them is limited to within two meters. Similarly, this problem persists with low-voltage molded case circuit breakers.

The above methods fail to meet the requirements of user equipment installation regulations and the regulations of the Ministry of Labor's Occupational Health and Safety Act, as they cannot address interlocking functions between switches of different brands, models, and sizes.

This invention presents a universal type of controller that can solve the aforementioned problems. It can be applied to interlock between low-voltage air circuit breakers and molded case circuit breakers, achieving the electrical and mechanical interlock function as required by regulations.

The main technical features of this controller include a power state input unit, a power state detection unit, a switch state point input unit, an operating sequence interlock logic circuit unit, and an interlock operating state output unit. All information is processed by a microprocessor in the operating sequence interlock logic circuit unit, and interlock operating state output signals are sent out according to the operating sequence logic requirements, achieving the function of automatic interlocking.

Description

Low voltage switch automatic interlock controller

This invention is a low-voltage switch automatic interlocking controller, which can improve the existing power circuit to achieve the stability of power supply quality, and has the function of power load distribution. It will be completed by multiple power circuits and multiple interlocking functions between switches, but it must prevent accidents caused by the closing of non-set action switches. In general known technologies, the low-voltage switches are all from the same brand. The same size type can only be interlocked. Whether the low-pressure air circuit breaker is interlocked by iron rods or steel cables, the distance is limited to two meters, or the low-pressure molded case circuit breaker also has the same problem that cannot be overcome. The above methods cannot meet the requirements of user electrical equipment installation rules and regulations and the requirements of the Ministry of Labor's occupational health and safety laws, and cannot solve the interlocking functions of different brands, models, and sizes of switches. This creation is a universal controller that can solve the above problems and can be applied to the interlocking between low-pressure air circuit breakers and molded case circuit breakers. A controller that achieves the regulations that the interlocking between switches must be electrical and mechanical interlocking. The main technical feature of this creation is that the controller is equipped with an electric state A state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, and an interlock action state output unit are provided. All information is transmitted through a microprocessor in the action sequence interlock logic circuit unit to send information to the interlock action state output unit according to the action sequence logic requirements, thereby achieving the function of automatic interlocking.

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. Therefore, 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. It cannot be effectively used, which 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 or more than three circuit breakers, the above difficulties cannot be overcome. Therefore, this creative low-voltage switch automatic interlocking controller can be used to solve the above problems.

When multiple circuit breakers must be locked, that is, multiple circuit breakers must be interlocked, that is, multiple circuit breakers must be able to set the operation sequence according to the needs. If the low-voltage switch automatic interlocking controller of this invention can be applied, the long-standing problem can be solved. Moreover, since the controller itself can detect the power state of the power circuit and the state of the switch itself, the reliability of its power consumption can be improved, and the convenience and safety of use can be increased. This invention also improves the inconvenience and shortcomings of the patent for the lock device of the non-fuse switch in 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. This invention also improves the problem that may be caused by the electrical locking function in the lock part of the improved patent for the switch safety interlocking method. For example, power outages, disconnections, etc. may cause the trouble of false action or inaction. 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 Kerkey. 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. More than four switches cannot be interlocked. Domestic and foreign operators have not been able to properly solve these problems to enhance 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 universal, and the specifications are limited. Similarly, the automatic switching switch 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 use programmable controllers (PLCs) to achieve the above functional requirements. 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 interlocking function between circuit breakers using the electrical and mechanical interlocking method has become marketable and urgent to improve industrial safety. This invention of low-voltage switch automatic interlocking controller can improve this deficiency.

Based on the above-mentioned knowledge and skills, if the distance between three switch circuit breakers of the same brand, model and size exceeds two meters, it will be difficult to manufacture and cannot meet the electrical and mechanical interlocking functions required by regulations. Moreover, the interlocking requirements of three power circuits and four switches are not met in actual power system applications. Circuit breakers are generally used, and the distance is generally more than two meters, which leads to the fact that there are requirements for power load distribution and power quality improvement in general power systems that cannot be achieved due to the lack of appropriate interlocking control methods. In order to solve the actual needs and problems of the above customers, this creative low-voltage switch automatic interlocking controller can effectively solve the problem.

The main purpose of this invention is to provide an interlocking controller used between circuit breakers, which can improve the existing power circuit to achieve the stability of power supply quality and has the function of power load distribution. It will be completed by multiple power circuits and multiple switches interlocking functions, but it must prevent accidents caused by the closing of non-set action switches. General knowledge and technology Among them, low-voltage switches are all of the same brand and size for interlocking. Whether it is the interlocking of low-pressure air circuit breakers with iron rods or steel cables, the distance is limited to two meters. Low-voltage molded case circuit breakers also have the same problem that cannot be overcome. The above methods cannot meet the requirements of user electrical equipment installation rules and regulations and the Ministry of Labor's occupational health and safety laws. The requirements cannot solve the interlocking functions of different brands, models and sizes of switches. This invention is a universal controller that can solve the above problems and can be applied to the interlocking of low-pressure air circuit breakers and modular circuit breakers. It meets the regulations that the interlocking between switches must be electrical and mechanical. The main technical feature of this invention is that the controller is set There is a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, and an interlock action state output unit. All information is sent to the interlock action state output unit according to the action sequence logic requirements by a microprocessor in the action sequence interlock logic circuit unit, thereby achieving the function of automatic interlocking.

To achieve the above purpose, the electrical and mechanical interlocking of this creative low-voltage switch automatic interlocking controller must be reliable and safe. It must be universal for any specifications, can be interlocked at will, 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 to meet the specifications. If the problem of being able to be used in any specification can be solved, the product can be standardized and standardized. This problem has always existed in the power system and cannot be effectively solved. For the problems that cannot be overcome by previous technologies and the inconvenience in use, there is a product demand for this creative low-voltage switch automatic interlocking controller.

To achieve the above purpose, this invention of low-voltage switch automatic interlocking controller can improve the conventional interlocking method of circuit breaker panels, such as using automatic transfer switch (ATS) to interlock two units; or using sheet metal method or steel cable method for interlocking; two units of the same brand, specification and size can be interlocked and the circuit breaker structure must be destroyed, and more than three units cannot be interlocked; and they must be in the same space. This invention is not limited by brand, specification and size, etc. Circuit breaker panels can be interlocked electrically and mechanically, without space restrictions and can be interlocked across long distances, easy to install, economical and affordable, and improve the safety of electricity use. It is not affected by the different items or poles of the circuit breaker itself. The purpose of solving the problem is not only novelty and progress, but also the focus of this creation must consider market issues. In addition to the functionality of the solution, the market issue is 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, a low-voltage switch automatic interlock controller includes: a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, and an interlock action state output unit; the power state input unit electrically connects each phase power of the power loop with the power state detection unit; the power state detection unit, according to each phase power of the power loop in the power state input unit, A resistor voltage divider rectifier element or a voltage divider rectifier element having a plurality of resistors connected in series is connected between the phase sequence and the ground terminal to sense the voltage signal of the power supply loop, and electrically connect the state signal of each phase sequence being energized or de-energized to the actuation sequence interlocking logic circuit unit; the switch state point input unit electrically connects the dry contacts of each switch closing and starting state to the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit The power state detection unit is electrically connected to the switch state point input unit, and a microprocessor is provided according to the interlocking logic requirements of the actuation sequence. The microprocessor determines and calculates the state of the circuit breaker according to the voltage signal of each phase sequence of each switch power side detected to determine whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., and then reads the information of the switch state point input unit and determines the corresponding state. The interlocking action state output unit is activated according to the action sequence interlocking logic requirement; the interlocking action state output unit is activated according to the information sent by the microprocessor in the action sequence interlocking logic circuit unit, so that each switch performs the closing and locking functions according to the action information; wherein the low-voltage switch automatic interlocking controller, each switch in the power supply circuit is activated according to the action sequence logic set by the microprocessor to achieve the interlocking function.

To achieve the above-mentioned purpose, a low-voltage switch automatic interlock controller includes: a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, an interlock action state output unit, and a display unit; the power state input unit electrically connects each phase power supply of the power loop with the power state detection unit; the power state detection unit connects a resistor voltage divider in series between each phase power supply of the power loop in the power state input unit and the ground terminal according to each phase sequence. The rectifier element or the voltage-dividing rectifier element having a plurality of resistors connected in series is used to sense the voltage signal of the power supply loop, and electrically connect the state signal of each phase sequence being energized or de-energized to the actuation sequence interlocking logic circuit unit; the switch state point input unit electrically connects the dry contacts of each switch closing and opening state with the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit electrically connects the power state detection unit with the switch state point input unit, and according to the actuation sequence interlocking logic requirements, A microprocessor is provided. The microprocessor determines the state of the circuit breaker and determines whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., according to the voltage signal of each phase sequence of each switch power supply side under inspection. Then, according to the information reading of the switch state point input unit, according to the requirements of the corresponding action sequence interlock logic, information is sent to activate the interlock action state output unit and the display unit; the interlock action state output unit, according to the action sequence interlock logic circuit unit The information sent by the microprocessor is actuated to make each switch close and lock according to the actuation information: the display unit displays the status of the low-voltage switch automatic interlocking controller according to the information sent by the microprocessor in the actuation sequence interlocking logic circuit unit, and can display whether the actuation sequence interlocking logic table is correct on the display unit; wherein the low-voltage switch automatic interlocking controller, each switch in the power supply circuit is actuated according to the actuation sequence logic set by the microprocessor, to achieve the interlocking actuation and display functions.

1: Low voltage switch automatic interlock controller

2: Power circuit 1

3: Power circuit 2

4: Backup power circuit three

5: Power switch 1

6: Power switch 2

7: Contact switch three

8: Backup switch 4

10: Power status input unit

11: Power supply of each phase of power loop 1

12: Power supply of each phase of power loop 2

13: Each phase power supply of backup power circuit 3

20: Power status detection unit

30: Switch status point input unit

31: Dry contact for the closed and open state of power switch 1

32: Dry contact for the closed and open state of power switch 2

33: Dry contact for connecting the closed and opened status of switch 3

34: Dry contact for the closed and opened state of standby switch 4

40: Actuation sequence interlocking logic circuit unit

41: Microprocessor

50: Interlocking action status output unit

51: Switch-electric locking device

52: Switch-electric closing and opening device

53: Switch 2 electric locking device

54: Switch 2 electric closing and starting device

55: Contact switch three electric locking device

56: Contact switch three electric closing and starting device

57: Spare switch four electric locking device

58: Backup switch four electric closing and starting devices

60: Display unit

[Figure 1] is a schematic diagram of the configuration of the four switches in the three power circuits and the interlocking of the first embodiment of a low-voltage switch automatic interlocking controller created by this invention.

[Figure 2] is a schematic diagram of the circuit and actuation logic configuration of the first embodiment of a low-voltage switch automatic interlocking controller created by this invention.

[Figure 3] is a schematic diagram of the configuration of two power supply loops and three switches interlocking in the second embodiment of a low-voltage switch automatic interlocking controller of this invention

[Figure 4] is a schematic diagram of the circuit and actuation logic configuration of the second embodiment of a low-voltage switch automatic interlocking controller of this invention

[Figure 5] is a schematic diagram of the configuration of two power supply circuits and two switches of the third embodiment of a low-voltage switch automatic interlocking controller of this invention

[Figure 6] is a schematic diagram of the circuit and actuation logic configuration of the third embodiment of a low-voltage switch automatic interlocking controller created by this invention.

The invention provides a schematic diagram of a low-voltage switch automatic interlocking controller 1, as shown in FIG1 , a power state input unit 10, which is electrically connected to three power loop circuits, power loop 1 2, power loop 2 3 and backup power loop 3 4, the power loop 1 2 is electrically connected to a power switch 1 5, the power loop 2 3 is electrically connected to a power switch 2 6, the power switch 1 5 and the power switch 2 6 are electrically connected to a connecting switch 3 7, the backup power loop 3 4 is electrically connected to a backup The four-phase power supply 8 is connected to the four-phase power supply 8 of the low-voltage switch, and the four-phase power supply 8 is electrically connected to the three-phase power supply 7 of the low-voltage switch; the low-voltage switch automatic interlocking controller 1 includes: the power state input unit 10 is composed of three power supply loops, the phase power supply 11 of the power supply loop 1 is such as R1, S1, T1, N, the phase power supply 12 of the power supply loop 2 is such as R2, S2, T2, N, and the phase power supply 13 of the three-phase power supply loop is such as R3, S3, T3, N, and the above phase power supplies are all electrically connected to the power state input unit 10. A power state detection unit 20, the power state detection unit 20 detects the power state of each phase of the power supply 11 of the power supply circuit 1 of the power supply circuit 1 2, the power supply 12 of the power supply circuit 2 of the power supply circuit 2 of the power supply circuit 3, and the power state of each phase of the power supply 13 of the backup power supply circuit 3 of the backup power supply circuit 3 of the backup power supply circuit 4, and connects a resistor voltage-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected in series between each phase sequence and the ground terminal to sense the switching power supply side of each power circuit. The voltage signal electrically connects the state signals of each phase sequence, whether it is powered or not, to an actuation sequence interlocking logic circuit unit 40; a switch state point input unit 30, which is composed of four switch state point inputs, a closed and opened state dry contact 31 of the power switch 1, a closed and opened state dry contact 32 of the power switch 2, a closed and opened state dry contact 33 of the connection switch 3 and a closed and opened state dry contact 34 of the backup switch 4. The switch state point input unit 30 is interlocked with the actuation sequence. The logic circuit unit 40 is electrically connected; a microprocessor 41 is provided inside the actuation sequence interlock logic circuit unit 40, and the program of the keys in the microprocessor 41 determines and calculates the state of the circuit breaker according to the voltage signal of each phase sequence of each switch power side detected to determine whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc. The switch of each switch above the power switch 1 5, the power switch 2 6, the contact switch 3 7 and the spare switch 4 8 is determined. The switch state point input unit 30 is also electrically connected to the microprocessor 41. The microprocessor 41 activates an interlocking state output unit 50 according to the set actuation logic diagram; the interlocking state output unit 50 activates the four switches in the low-voltage switch automatic interlock controller 1 according to the information of the microprocessor 41. The switch 1 electric locking device 51 and the switch 1 electric closing and opening device 52 of the power switch 1 activate the power switch 1 5, and the switch 2 electric locking device 53 of the power switch 2 activates the power switch 1 5. The switch 2 electric closing and opening device 54 activates the power switch 2 6, the link switch 3 electric closing and locking device 55 and the link switch 3 electric closing and opening device 56 activate the link switch 3 7, and the standby switch 4 electric closing and locking device 57 and the standby switch 4 electric closing and opening device 58 activate the standby switch 4 8; a display unit 60, the microprocessor 41 electrically connects all status information to the display unit 60; wherein the low-voltage switch automatic interlocking controller 1 connects the power circuit 1 2 and the power circuit The power status information of the second 3 and the backup power loop three 4, the switch status information of each switch status point of the power switch one 5, the power switch two 6, the contact switch three 7 and the backup switch four 8 are electrically connected to the microprocessor 41 through the actuation sequence interlocking logic circuit unit 40. The microprocessor 41 sends the actuation information to the interlocking actuation status output unit 50 and the display unit 60 according to the actuation requirements of the sequence logic diagram, so as to achieve the actuation function requirements of the low-voltage switch automatic interlocking controller 1.

This invention provides a low-voltage switch automatic interlocking controller 1. The first implementation example of the three-power circuit four-switch interlocking circuit diagram and actuation logic schematic diagram is shown in Figure 2. The actuation principle shown in Figure 2 is as described in [0012] above.

The invention discloses a low-voltage switch automatic interlocking controller 1. The second embodiment of the two power circuits and three switches interlocking configuration is shown in FIG3. A power state input unit 10 is electrically connected to two power circuits, power circuit 1 2 and power circuit 2 3. The power circuit 1 2 is electrically connected to a power switch 1 5. The power circuit 2 3 is electrically connected to a power switch 2 6. The power switch 1 5 and the power switch 2 6 are connected to a The low voltage switch automatic interlocking controller 1 comprises: the power state input unit 10 is composed of two separate power circuits, each phase power 11 of the power circuit 1 is such as R1, S1, T1, N, and each phase power 12 of the power circuit 2 is such as R2, S2, T2, N, and each phase power is electrically connected to the power state input unit 10; a power state detection unit 20, the power state detection unit The detection unit 20 connects a resistor voltage-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected in series between each phase sequence and the ground terminal of each phase power source 11 of the power loop 1 2 and each phase power source 12 of the power loop 2 3 to sense the voltage signal of the switch power side in each power loop, and electrically connects the state signal of power on and power off of each phase sequence to an actuation sequence mutual A lock logic circuit unit 40; a switch state point input unit 30, which has three switch state point inputs, a closed and open state dry contact 31 of the power switch 1, a closed and open state dry contact 32 of the power switch 2 and a closed and open state dry contact 33 of the connection switch 3, the switch state point input unit 30 is electrically connected to the actuation sequence interlock logic circuit unit 40; the actuation sequence interlock logic circuit unit A microprocessor 41 is provided inside the microprocessor 41. The program in the microprocessor 41 determines the state of the circuit breaker and determines whether the power circuit is in a normal state or an abnormal state, such as phase failure, reverse phase, high voltage, low voltage, etc., according to the voltage signal of each phase sequence of each switch power side under the detection. The switch state point input unit 30 of the power switch 1 5, the power switch 2 6 and the connection switch 3 7 above is also electrically connected to the power switch 1 5, the power switch 2 6 and the connection switch 3 7. The microprocessor 41 is connected to the microprocessor 41, and the microprocessor 41 activates an interlocking actuation state output unit 50 according to the set actuation logic diagram; the interlocking actuation state output unit 50 activates the three switches in the low-voltage switch automatic interlocking controller 1 according to the information of the microprocessor 41, and the switch-one electric locking device 51 and the switch-one electric closing and opening device 52 of the power switch 1 5 and the power switch 2 6 respectively. The switch 2 electric lock device 53 and the switch 2 electric closing and opening device 54 actuate the power switch 2 6, and the contact switch 3 electric lock device 55 and the contact switch 3 electric closing and opening device 56 actuate the contact switch 3 7; a display unit 60, the microprocessor 41 electrically connects all status information to the display unit 60; wherein the low-voltage switch automatic interlocking controller 1 connects the power supply circuit 1 2 and the power supply circuit 2 3 The switch status information of each switch status point of the power switch 1 5, the power switch 2 6 and the contact switch 3 7 is electrically connected to the microprocessor 41 through the actuation sequence interlocking logic circuit unit 40. The microprocessor 41 sends the actuation information to the interlocking actuation status output unit 50 and the display unit 60 according to the actuation requirements of the sequence logic diagram, thereby achieving the actuation function requirements of the low-voltage switch automatic interlocking controller 1.

This invention provides a low-voltage switch automatic interlocking controller 1 second implementation example. The circuit diagram and actuation logic schematic diagram of two power supply loops and three switches interlocking are shown in Figure 4. The actuation principle shown in Figure 4 is as described in [0014] above.

The invention discloses a low-voltage switch automatic interlocking controller 1. The schematic diagram of the interlocking configuration of two power circuits and two switches is shown in FIG5. A power state input unit 10 is electrically connected to two power circuits, power circuit 1 2 and power circuit 2 3. The power circuit 1 2 is electrically connected to a power switch 1 5. The power circuit 2 3 is electrically connected to a power switch 2 6. The power switch 1 5 is electrically connected to the power circuit 2 3. The switch 2 6 is electrically connected; the low-voltage switch automatic interlocking controller 1 includes: the power state input unit 10 has two separate power loops, each phase power 11 of the power loop 1 such as R1, S1, T1, N and each phase power 12 of the power loop 2 such as R2, S2, T2, N, and the above phase power is electrically connected to the power state input unit 10; a power state detection unit 2 0, the power state detection unit 20 detects the power state of each phase of the power supply 11 of the power supply circuit 1 of the power supply circuit 1 2, the power supply 12 of the power supply circuit 2 of the power supply circuit 2 3, and each phase, and connects a resistor voltage-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected in series between each phase sequence and the ground terminal to sense the voltage signal of the switch power side in each power circuit. , the state signals of each phase sequence being energized or de-energized are electrically connected to an actuation sequence interlocking logic circuit unit 40; a switch state point input unit 30 is composed of two switch state point inputs, a closing and opening state dry contact 31 of the power switch 1 and a closing and opening state dry contact 32 of the power switch 2, and the switch state point input unit 30 is electrically connected to the actuation sequence interlocking logic circuit unit 40. The actuation sequence interlocking logic circuit unit 40 is internally provided with a microprocessor 41. The program in the microprocessor 41 determines the state of the circuit breaker and determines whether the power circuit is in a normal state or an abnormal state, such as phase failure, reverse phase, high voltage, low voltage, etc., according to the voltage signal of each phase sequence of each switch power side detected. The power switch 1 5 and the power switch 2 6 are connected to each other. The switch state point input unit 30 of each switch is also electrically connected to the microprocessor 41. The microprocessor 41 activates an interlocking state output unit 50 according to the set action logic diagram; the interlocking state output unit 50 activates two switches in the low-voltage switch automatic interlock controller 1 according to the information of the microprocessor 41, and the switch-electric locking device 51 of the power switch 1 and the switch 1 are respectively activated. An electric closing and opening device 52 actuates the power switch 1 5, and the switch 2 electric closing and opening device 53 and the switch 2 electric closing and opening device 54 of the power switch 2 actuate the power switch 2 6; a display unit 60, and the microprocessor 41 electrically connects all status information to the display unit 60; wherein the low-voltage switch automatic interlocking controller 1 connects the power state of the power circuit 1 2 and the power circuit 2 3 The switch state information of each switch state point of the power switch 1 5 and the power switch 2 6 is electrically connected to the microprocessor 41 through the actuation sequence interlocking logic circuit unit 40. The microprocessor 41 sends actuation information to the interlocking actuation state output unit 50 and the display unit 60 according to the actuation requirements of the sequence logic diagram, thereby achieving the actuation function requirements of the low-voltage switch automatic interlocking controller 1.

This invention provides a low-voltage switch automatic interlocking controller 1. The third implementation example of the two power supply circuits and two switches interlocking circuit diagram and actuation logic schematic diagram are shown in Figure 6. The actuation principle shown in Figure 6 is as described in [0016] above.

In summary, the low-voltage switch automatic interlock controller of this invention further improves the stability and safety of the circuit breaker panel in the power supply system, and has great industrial application value. 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 actual creation, 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 implementation example of this creation, and it cannot be used to limit the scope of rights of this creation. All equivalent changes or modifications made in accordance with the spirit of this creation are still covered by the scope of the patent application of this creation.

1: Low voltage switch automatic interlock controller

2: Power circuit 1

3: Power circuit 2

4: Backup power circuit three

5: Power switch 1

6: Power switch 2

7: Contact switch three

8: Backup switch 4

10: Power status input unit

11: Power supply of each phase of power loop 1

12: Power supply of each phase of power loop 2

13: Each phase power supply of backup power circuit 3

20: Power status detection unit

30: Switch status point input unit

31: Dry contact for the closed and open state of power switch 1

32: Dry contact for the closed and open state of power switch 2

33: Dry contact for connecting the closed and opened status of switch 3

34: Dry contact for the closed and opened state of standby switch 4

40: Actuation sequence interlocking logic circuit unit

41: Microprocessor

50: Interlocking action status output unit

51: Switch-electric locking device

52: Switch-electric closing and opening device

53: Switch 2 electric locking device

54: Switch 2 electric closing and starting device

55: Contact switch three electric locking device

56: Contact switch three electric closing and starting device

57: Spare switch four electric locking device

58: Backup switch four electric closing and starting devices

60: Display unit

Claims (2)

A low-voltage switch automatic interlock controller includes: a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, and an interlock action state output unit; the power state input unit electrically connects each phase power of a power loop with the power state detection unit; the power state detection unit detects each phase power of the power loop in the power state input unit according to each phase sequence and the connected state. A resistor voltage divider rectifier element or a voltage divider rectifier element having a plurality of resistors connected in series is connected in series between the ground terminals to sense the voltage signal of the power supply circuit, and electrically connect the state signal of power on and power off of each phase sequence to the actuation sequence interlocking logic circuit unit; the switch state point input unit electrically connects the dry contact points of the closing and opening states of each switch to the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit electrically The power state detection unit is connected to the switch state point input unit, and a microprocessor is provided according to the interlocking logic requirements of the actuation sequence. The microprocessor determines and calculates the state of the circuit breaker according to the voltage signal of each phase sequence of each switch power side detected to determine whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., and then reads the information of the switch state point input unit and performs the corresponding operation. According to the needs of the action sequence interlocking logic, information is sent to activate the interlocking action state output unit; the interlocking action state output unit is actuated according to the information sent by the microprocessor in the action sequence interlocking logic circuit unit, so that each switch performs the closing and locking functions according to the actuation information; wherein the low-voltage switch automatic interlocking controller, each switch in the power supply circuit is actuated according to the action sequence logic set by the microprocessor to achieve the interlocking function. A low-voltage switch automatic interlock controller includes: a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlock logic circuit unit, an interlock action state output unit, and a display unit; the power state input unit electrically connects each phase power supply of a power loop with the power state detection unit; the power state detection unit connects a resistor voltage divider rectifier element or a resistor voltage divider rectifier element in series between each phase power supply of the power loop in the power state input unit and a ground terminal according to each phase sequence. The first is a voltage-dividing rectifier element having a plurality of resistors connected in series, which is used to sense the voltage signal of the power supply circuit, and electrically connect the state signal of each phase sequence being energized or de-energized to the action sequence interlocking logic circuit unit; the switch state point input unit electrically connects the dry contacts of each switch closing and opening state and the action sequence interlocking logic circuit unit; the action sequence interlocking logic circuit unit electrically connects the power state detection unit and the switch state point input unit, and sets a A microprocessor, the microprocessor determines the state of the circuit breaker and determines whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., according to the state of the voltage signal of each phase sequence of each switch power supply side detected. Then, according to the information reading of the switch state point input unit, according to the requirements of the corresponding action sequence interlock logic, the microprocessor sends information to activate the interlock action state output unit and the display unit; the interlock action state output unit, according to the action sequence interlock logic circuit unit, The information sent by the microprocessor is actuated to make each switch close and lock according to the actuation information; the display unit displays the status of the low-voltage switch automatic interlocking controller according to the information sent by the microprocessor in the actuation sequence interlocking logic circuit unit, and can display whether the actuation sequence interlocking logic table is correct on the display unit; wherein the low-voltage switch automatic interlocking controller, each switch in the power supply circuit is actuated according to the actuation sequence logic set by the microprocessor, to achieve the interlocking actuation and display functions.

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