TWI862203B - 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 oft his 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

The present invention discloses 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 can be completed by using multiple power circuits and multiple interlocking functions between switches, but it is also necessary to prevent accidents caused by the closing of non-set action switches. In the general known technology, the low-voltage switches are all of 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. The present invention is a universal controller that can solve the above problems and is applicable to the interlocking between low-pressure air circuit breakers and molded case circuit breakers. A controller that achieves the function of electrical and mechanical interlocking between regulations for interlocking between switches. The main technical feature of the present invention is that the controller is provided 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 new and old 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, the low-voltage switch automatic interlocking controller of the present invention 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 the present invention can be applied, the long-standing problem can be solved, and because 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. The present invention also improves the inconvenience and shortcomings of the patent for the non-fuse switch lockout device of the M318184 patent. Although it can only lock the tripped position, it meets the requirement of the lockout device that must be able to lock when the power is off during maintenance, but it is not universally applicable to the aforementioned other different functional requirements. The interlocking function cannot automatically lock/close the circuit breaker. 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 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 uses key management, which also raises concerns about misoperation. There has been 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, and it may not be able to operate if it is disabled. In addition, the electronic method is afraid of misoperation, and 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 breaker panels using electrical and mechanical interlocking methods has become marketable and urgent to improve industrial safety. The low-voltage switch automatic interlocking controller of the present invention 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 the requirements for power load distribution and power quality improvement in general power systems 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, the low-voltage switch automatic interlocking controller of the present invention can effectively solve the problem.

The main purpose of the present 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 is also necessary to prevent accidents caused by the closing of non-set action switches. 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 invention is a universal controller that can solve the above problem and can be applied to the interlocking between 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 the 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 the low-voltage switch automatic interlocking controller of the present invention must be reliable and safe, and it must be universal for any specifications, 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 for 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 previous technologies and the inconvenience in use, there is a product demand for the low-voltage switch automatic interlocking controller of the present invention.

To achieve the above purpose, the low-voltage switch automatic interlocking controller of the present invention can improve the conventional interlocking method of the circuit breaker panel, such as using an automatic transfer switch (ATS) to interlock two panels; or using a sheet metal method or a steel cable method for interlocking; two panels of the same brand, specification, and size can be interlocked and the circuit breaker structure must be destroyed, and more than three panels cannot be interlocked; and they must be in the same space. The present invention is not limited by brand specifications and sizes, and the circuit breaker panels can be interlocked electrically and mechanically, without space restrictions and can be interlocked across panels over long distances. It is easy to install, economical, and affordable, and improves the safety of electricity use. It is not affected by the different items or poles of the circuit breaker itself. 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, 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 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 plurality of resistor voltage dividers 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 voltage dividing rectifier element with resistors connected in series is used to sense the voltage signal of the power supply loop, and electrically connects the state signal of each phase sequence being energized or not to the actuation sequence interlocking logic circuit unit; the switch state point input unit electrically connects the dry contact points of each switch closing and opening state to the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit electrically connects the power state detection unit and the switch state point input unit, and a microprocessor is set according to the actuation sequence interlocking logic requirement, and the microprocessor is based on the detected indication. The voltage signal of each phase sequence of each switch power side is determined to determine the state of the circuit breaker and determine whether the power circuit is normal or abnormal, such as phase loss, reverse phase, high voltage, low voltage, etc. Then, according to the information of the switch state point input unit, according to the requirements of the corresponding actuation sequence interlock logic, the interlock between the two switches of the two power circuits or the interlock between the three switches of the two power circuits that allows the two switches to be actuated or the interlock between the four switches of the three power circuits that allows the two switches to be actuated is issued to activate the interlock actuation 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 action information; wherein the low-voltage switch automatic interlocking controller, each switch in the power circuit is actuated logically according to the action sequence set by the microprocessor, and the interlocking between the two switches of the two power circuits or the interlocking between the three switches of the two power circuits to allow the two switches to be actuated or the interlocking between the four switches of the three power circuits to allow the two switches to be actuated is achieved.

To achieve the above-mentioned purpose, a low-voltage switch automatic interlocking controller includes: a power state input unit, a power state detection unit, a switch state point input unit, an action sequence interlocking logic circuit unit, an interlocking 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-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected 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, so as to sense The voltage signal of the power supply circuit is measured, and the state signal of each phase sequence being energized or de-energized is electrically connected 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 to the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit A circuit unit is electrically connected to the power state detection unit and the switch state point input unit, and a microprocessor is provided according to the interlocking logic requirements of the actuation sequence. The microprocessor determines the state of the circuit breaker and determines the power loop according to the voltage signal of each phase sequence of each switch power side detected. The circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., and then according to the information of the switch state point input unit, according to the requirements of the corresponding actuation sequence interlock logic, the interlock between the two switches of the two power circuits or the interlock between the three switches of the two power circuits that allows the two switches to be actuated or the interlock between the four switches of the three power circuits that allows the two switches to be actuated is sent out to activate the interlock actuation state output unit and the display unit; the interlock actuation state output unit is actuated according to the information sent by the microprocessor in the actuation sequence interlock logic circuit unit, so that each switch is closed 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, the switches in the power circuit are actuated according to the actuation sequence logic set by the microprocessor, and the interlocking between the two switches of the two power circuits or the interlocking between the three switches of the two power circuits to allow the two switches to actuate or the interlocking between the four switches of the three power circuits to allow the two switches to actuate is achieved 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: Each phase power supply 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: Spare switch four electric closing and starting device

60: Display unit

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

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

The present invention discloses 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 connection switch 3 7, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 2 3 is electrically connected to a backup power switch 2 6, the power switch 1 5 and the power switch 2 6 are electrically connected to a connection switch 3 7, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power loop 3 4 is electrically connected to a backup power switch 1 5, the backup power switch 1 5 ... The switch 4 8, the standby switch 4 8 is electrically connected to the connection switch 3 7; the low-voltage switch automatic interlocking controller 1 includes: the power state input unit 10 is composed of three separate power loops, each phase power 11 of the power loop 1 is such as R1, S1, T1, N, each phase power 12 of the power loop 2 is such as R2, S2, T2, N, and each phase power 13 of the standby power loop 3 is such as R3, S3, T3, N, and each phase power is electrically connected to the power state input unit 10; A 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 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 power state of the switch power side in each power circuit. The voltage signal electrically connects the state signals of each phase sequence with or without power 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, the closing and opening state dry contact 31 of the power switch 1, the closing and opening state dry contact 32 of the power switch 2, the closing and opening state dry contact 33 of the connection switch 3 and the closing and opening state dry contact 34 of the backup switch 4. The switch state point input unit 30 is connected to the actuation sequence interlocking logic circuit unit 40; the switch state point input unit 30 is ... The interlocking logic circuit unit 40 is electrically connected; a microprocessor 41 is provided inside the actuation sequence interlocking 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 state of 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 power switch 1 5, the power switch 2 6, the contact switch 3 7 and the spare switch 4 8 above each switch 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 interlocking 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 circuit 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.

The present invention discloses 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 FIG2. The actuation principle shown in FIG2 is as described in the above description [0012].

The second embodiment of the low-voltage switch automatic interlocking controller 1 of the present invention is a schematic diagram of a two-power-loop three-switch interlocking configuration as shown in FIG3. A power state input unit 10 is electrically connected to two power loop circuits, power loop 1 2 and power loop 2 3. 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 power switch 1 5. The contact switch 3 7 is electrically connected; the low-voltage switch automatic interlock controller 1 includes: the power state input unit 10 has two separate power circuits, the power phases 11 of the power circuit 1 are such as R1, S1, T1, N, and the power phases 12 of the power circuit 2 are such as R2, S2, T2, N, and the above power phases are electrically connected to the power state input unit 10; a power state detection unit 20, the power state detection 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 circuit breaker 40. The program inside 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 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 The microprocessor 41 is electrically connected to the microprocessor 41, and the microprocessor 41 activates an interlocking actuation state output unit 50 according to a set actuation logic diagram; the interlocking actuation state output unit 50 activates 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 starting device 52 of the power switch 1 5 activate the power switch 1 5, the power switch 2 6 The switch 2 electric lock device 53 and the switch 2 electric closing and opening device 54 actuate the power switch 2 6, 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 circuit 1 2 and the power 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.

The second embodiment of the low-voltage switch automatic interlocking controller 1 of the present invention includes a circuit diagram and an actuation logic diagram of two power supply circuits and three switches interlocking, as shown in FIG4. The actuation principle shown in FIG4 is as described in the above description [0014].

The third embodiment of the low-voltage switch automatic interlocking controller 1 of the present invention is a schematic diagram of the interlocking configuration of two power circuits and two switches as shown in Figure 5. A power state input unit 10 is electrically connected to the 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, and 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 The power switch 2 6 is electrically connected; the low-voltage switch automatic interlock 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 each phase power is 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 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 power state signal of each phase sequence is electrically connected to an actuation sequence interlocking logic circuit unit 40; a switch state point input unit 30 has two switch state point input components, a closed and open state dry contact 31 of the power switch 1 and a closed and open state dry contact 32 of the power switch 2. 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 loss, 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, 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 status 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.

The third implementation example of the low-voltage switch automatic interlocking controller 1 of the present invention, the circuit diagram and the actuation logic schematic diagram of the two power circuits and two switches interlocking 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 the present invention further improves the stability and safety of the circuit breaker panel in the power supply system, and has great industrial applicability. 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 advancement. 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: 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: Each phase power supply 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 opening 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 supply of a power loop with the power state detection unit; the power state detection unit connects 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, or has a plurality of resistors connected in series with each other. The voltage dividing rectifier element connected is used to sense the voltage signal of the power supply loop, and electrically connects the state signal of each phase sequence being energized or not to the action sequence interlocking logic circuit unit; the switch state point input unit electrically connects each switch closing and opening state dry contact point to 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 a microprocessor is set according to the action sequence interlocking logic requirements, and the microprocessor is based on each of the detected indications. The voltage signal of each phase sequence on the power side of the switch is used to determine the state of the circuit breaker and judge whether the power circuit is in a normal state or an abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc. Then, according to the information of the switch state point input unit, according to the requirements of the corresponding actuation sequence interlock logic, the interlock between the two switches of the two power circuits or the interlock between the three switches of the two power circuits that allows the two switches to be actuated or the interlock between the four switches of the three power circuits that allows the two switches to be actuated is sent out to activate the interlock actuation 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 action information; wherein the low-voltage switch automatic interlocking controller, each switch in the power circuit is actuated logically according to the action sequence set by the microprocessor, and the interlocking between the two switches of the two power circuits or the interlocking between the three switches of the two power circuits to allow the two switches to be actuated or the interlocking between the four switches of the three power circuits to allow the two switches to be actuated is achieved. 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-dividing rectifier element or a voltage-dividing rectifier element having a plurality of resistors connected 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, so as to sense the power supply. The voltage signal of the loop electrically connects 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 to the actuation sequence interlocking logic circuit unit; the actuation sequence interlocking logic circuit unit , electrically connect the power state detection unit and the switch state point input unit, and set a microprocessor according to the action sequence interlock logic requirements. The microprocessor determines the state of the circuit breaker and determines whether the power loop is positive or negative according to the voltage signal of each phase sequence of each switch power side detected. Normal state or abnormal state, such as phase loss, reverse phase, high voltage, low voltage, etc., and then according to the information of the switch state point input unit, according to the requirements of the corresponding actuation sequence interlock logic, the interlock between the two switches of the two power circuits or the interlock between the three switches of the two power circuits that allows the two switches to be actuated or the interlock between the four switches of the three power circuits that allows the two switches to be actuated is sent out to activate the interlock actuation state output unit and the display unit; the interlock actuation state output unit is actuated according to the information sent by the microprocessor in the actuation sequence interlock logic circuit unit, so that each switch is closed and opened 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, the switches in the power circuit are actuated according to the actuation sequence logic set by the microprocessor, and the interlocking between the two switches of the two power circuits or the interlocking between the three switches of the two power circuits to allow the two switches to actuate or the interlocking between the four switches of the three power circuits to allow the two switches to actuate is achieved, so as to achieve the interlocking actuation and display functions.

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