Automatic running-in fault monitoring method and device for switching mechanism

Abstract

The invention discloses an automatic running-in fault monitoring method and device for a switching mechanism, relates to the technical field of electrical equipment testing and monitoring, and aims to solve the problems of fault missing detection, low accuracy and high cost caused by the fact that an existing service life running-in test of the switching mechanism depends on manual monitoring. A delay relay and an auxiliary relay are connected in parallel in the loop to monitor the action state of the contactor, and delay time is set to identify anomalies such as power-on timeout and the like; when a fault occurs, an alarm signal is triggered and uploaded to a cloud platform through an Internet of Things protocol, and remote alarm and recording are realized. According to the method, automatic online monitoring and fault protection in the running-in process of the switching mechanism are realized, the test accuracy and reliability are remarkably improved, and the labor cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment testing and monitoring technology, and in particular relates to a method and device for monitoring automatic break-in faults in switch mechanisms. Background Technology

[0002] In the research, development, testing, and production of power switchgear, life break-in testing is an essential step. This test is required for products such as 10kV pole-mounted switches, 35kV switchgear, and 110kV gas-insulated metal-enclosed switchgear circuit breakers. Currently, the industry commonly uses manual monitoring to complete the testing process, with professionals on duty day and night throughout the test period, drawing conclusions through manual observation and judgment. However, this method has several significant drawbacks in practical application. First, because the test period lasts nearly a month, and the operation is repetitive and has a single frequency, personnel are prone to inattention during long hours, making it difficult to effectively detect intermittent abnormalities. For example, during the test, the contactor inside the switchgear may fail to operate and then immediately recover on certain occasions. If such transient faults are not detected in time, the test conclusions will be inaccurate, creating potential problems for subsequent product operation.

[0003] Secondly, during the long-term break-in process, components such as relays and circuit breaker coils may experience abnormalities such as failure to disengage after engagement or prolonged energization of the coil due to thermal expansion or mechanical transmission issues. If not addressed promptly, these abnormalities can lead to a chain reaction of failures, including component burnout. Since there is often an indirect relationship between the fault symptoms and their causes, accurate tracing is difficult through manual observation alone, increasing the difficulty and cost of troubleshooting. Furthermore, the instantaneous noise level during the break-in process approaches 90 decibels, and prolonged exposure to high noise levels can damage the hearing health of test personnel. Simultaneously, full-time manual involvement significantly increases testing costs. In conclusion, existing manual monitoring methods are not only inaccurate and unreliable but also inefficient and pose occupational health risks. Therefore, a technical solution capable of automated monitoring and timely fault alarms is urgently needed. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a method and device for monitoring automatic break-in faults in switching mechanisms, thereby resolving the issues present in the prior art.

[0005] In a first aspect, to achieve the above objectives, the present invention provides a method for monitoring automatic break-in faults in switching mechanisms, comprising the following steps: S1. Analyze the control circuit of the switching mechanism and identify the operating cycle of the opening and closing contactor; S2. A time-delay relay and an auxiliary relay are connected in parallel in the control circuit to monitor the energized and de-energized states of the contactor. S3. Set the delay time of the delay relay to be greater than the normal opening and closing operation time or the opening and closing interval time; S4. When the contactor is energized for longer than the delay time, an alarm signal is triggered; S5. Upload the alarm signal to the cloud platform via the Internet of Things protocol to achieve remote alarm.

[0006] Optionally, the process of analyzing the control circuit of the switching mechanism includes: performing electrical circuit analysis of the GIS switching mechanism according to the GB / T 5094 standard drawings, identifying the AC contactor KMD or KME as a component of the electrical circuit of the mechanism body, wherein the contactor controls the opening and closing of the isolating switch or the grounding switch, wherein KMD1 controls the isolating switch opening, KMD2 controls the isolating switch closing, and when the KM coil is energized, the corresponding auxiliary points in the control circuit and the motor circuit self-lock, the motor circuit is connected, and the mechanism moves.

[0007] Optionally, the process of setting time delay relays and auxiliary relays in parallel in the control circuit includes: connecting time delay relays KT1, KT2, KT3, KT4 and auxiliary relays KA1 and KA2 in parallel across the coils of contactors KMD1 and KMD2. The voltage of the relays and contactors is equal and they operate independently. When the contactors are energized or de-energized, the relays will act accordingly or reset. When the auxiliary relays are energized, their auxiliary points will immediately switch states.

[0008] Optionally, the process of setting the delay time of the delay relay includes: adjusting the time parameters of the delay relay according to the normal opening and closing action time and the opening and closing interval time, so that Time1 and Time2 are greater than the opening and closing action time, Time3 is greater than the alarm signal response time, and Time4 is greater than the opening and closing interval time of the running-in equipment. The time parameters are manually set by adjusting the adjustment key on the delay relay.

[0009] Optionally, the process of triggering the alarm signal includes: when the contactor is energized for more than a set delay time, the normally open contact of the delay relay closes, the alarm circuit is connected, the alarm circuit is connected to the alarm signal input, the alarm receives the closed signal and verifies it through internal logic to prevent false activation, and outputs a valid alarm when the response time exceeds 1 second.

[0010] Optionally, the process of uploading the alarm signal to the cloud platform via the Internet of Things (IoT) protocol includes: the alarm transmitting the signal to the IoT cloud platform via the MQTT protocol, and the cloud platform generating a telephone call, WeChat or SMS alarm based on the received signal, and recording the alarm time, test subject and location information.

[0011] Secondly, the present invention also provides a device for monitoring automatic break-in faults in a switching mechanism, used to implement a method for monitoring automatic break-in faults in a switching mechanism, the device comprising: Power input circuit, used to provide AC power; The switching mechanism control circuit, connected to the power input circuit, includes a trip contactor coil and a closing contactor coil; The fault monitoring circuit, connected to the switch mechanism control circuit, includes multiple time-delay relays and auxiliary relays, used to monitor the energization status of the opening contactor coil and the closing contactor coil. An alarm circuit, connected to the fault monitoring circuit, is used to output an alarm signal when the fault monitoring circuit detects a fault. A protection control circuit, connected to the fault monitoring circuit and the switching mechanism control circuit, is used to disconnect the switching mechanism control circuit when the fault monitoring circuit detects a fault.

[0012] Thirdly, the present invention also provides a computer terminal device, comprising: One or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the method for monitoring automatic break-in faults of switching mechanisms in the first aspect described above.

[0013] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements the steps of the method for monitoring automatic break-in faults of a switching mechanism described in the first aspect above.

[0014] Fifthly, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method for monitoring automatic break-in faults of a switching mechanism described in the first aspect.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects: This invention provides an automated break-in fault monitoring method for switch mechanisms. By automating the monitoring of faults during the break-in process, this invention effectively overcomes the limitations of manual monitoring, achieving accurate data acquisition and improved reliability. The system can detect electrical faults in real time, such as contactor failure to trip or power interruption, and mechanical faults, such as broken gear teeth or malfunctioning limit switches, and promptly triggers alarm signals via relay logic. Alarm information is uploaded to a cloud platform via an Internet of Things (IoT) protocol, enabling remote notification and fault recording without the need for personnel on-site supervision, significantly reducing labor costs. Simultaneously, the device can quickly disconnect the circuit upon fault occurrence, protecting the test object from cascading damage, thereby enhancing the quality and stability of life testing. Furthermore, the entire solution is simple in structure and low in cost, and can be widely applied to break-in tests of various switch mechanisms, possessing good versatility and promotional value. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a circuit connection diagram of the fault monitoring and protection system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the control circuit of the switching mechanism according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the alarm logic triggering in an embodiment of the present invention.

[0017] The attached diagram includes the following reference numerals: 1. Coil of time-delay relay KT1; 2. Normally open and normally closed contact of KT1; 3. Coil of auxiliary relay KA1; 4. Normally open and normally closed contact of KA1; 5. Coil of KT3; 6. Normally closed contact of KA1; 7. Normally open contact of KT1; 8. Alarm signal input; 9. 220V AC power supply; 10. Isolation closing operation circuit of switch mechanism; 11. Main control circuit of switch mechanism (power input); 12. Alarm point connection; 13. Normally closed contact of KT3; 14. AC contactor KMD2; 15. Motor circuit of mechanism power supply (power input); 16. Motor M; Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0020] The technical solution of this invention is a method for automated break-in fault monitoring of switching mechanisms. Based on this method, and with the assistance of corresponding components and other devices, it fully utilizes electrical technology, electronic technology, Internet of Things technology, etc., as required. The specific solution is as follows: 1. Perform electrical circuit analysis of the GIS switch mechanism according to the GB / T 5094 standard drawings: In the switch mechanism control circuit, the AC contactor KMD or KME is a component of the mechanism's electrical circuit, used for motor start-stop control, and has multiple sets of normally open and normally closed contacts. KMD controls the opening and closing of the isolating switch, and KME controls the opening and closing of the grounding switch. Specifically, KMD1 controls the isolating switch opening, and KMD2 controls the isolating switch closing. When the KM coil is energized, the corresponding auxiliary points in the control circuit and motor circuit self-lock, the motor circuit is connected, and the mechanism operates; this applies to both opening and closing. Taking our automatic break-in equipment as an example, when the equipment is controlled to open or close, the control circuit maintains an AC 220V input. Therefore, the following solutions are based on this. If the power supply methods of different break-in equipment are different, according to the main idea, only slight modifications to the control system are needed.

[0021] 2. Anticipate potential failures: Electrical faults: power outage (including break-in end alarm), overheating and burning of components, open circuit, excessive opening and closing time, contactor failure to trip after engaging; Mechanical failures: broken gear teeth, jamming during meshing, fatigue fracture of bearings, and malfunction of limit switches.

[0022] 3. Solution approach: Based on the above fault analysis, a protection alarm system is designed without affecting the automatic break-in of the original mechanism. The alarm point is the fault signal receiving point, which can be divided into two groups according to the fault type: electrical and mechanical. Taking the power supply interruption due to electrical fault as an example, based on the cyclical nature of the break-in operation, it is known that after a certain number of seconds, the contactors KMD1 and KMD2 alternate between the states of being energized and de-energized, following the pattern of "KMD1 energized and de-energized, KMD2 energized and de-energized" as one cycle. This indicates that the contactors KMD1 and KMD2 are regularly energized and de-energized within a certain time. As long as a relay circuit is combined with the faulty areas as alarm points, a closing signal is sent to the alarm when a fault occurs. At the same time, the relay is used to set up a protection function to protect the break-in test object and prevent small faults from causing big problems.

[0023] Once the alarm receives a closing signal, it will upload it to an IoT cloud platform (Tencent Cloud, Alibaba Cloud, etc.) via the MQTT protocol, and then send an alarm via telephone call, WeChat, SMS, etc. The alarm will also be recorded, specifying the time, location, and test object. The alarm point can be connected via a wire from the device's own connector, or directly to the monitored object during break-in monitoring.

[0024] Example 1 This embodiment provides a method for monitoring automatic break-in faults in switching mechanisms, including: S1. Analyze the control circuit of the switching mechanism and identify the operating cycle of the opening and closing contactor; S2. A time-delay relay and an auxiliary relay are connected in parallel in the control circuit to monitor the energized and de-energized states of the contactor. S3. Set the delay time of the delay relay to be greater than the normal opening and closing operation time or the opening and closing interval time; S4. When the contactor is energized for longer than the delay time, an alarm signal is triggered; S5. Upload the alarm signal to the cloud platform via the Internet of Things protocol to achieve remote alarm.

[0025] Optionally, the process of analyzing the control circuit of the switching mechanism includes: performing electrical circuit analysis of the GIS switching mechanism according to the GB / T 5094 standard drawings, identifying the AC contactor KMD or KME as a component of the electrical circuit of the mechanism body, wherein the contactor controls the opening and closing of the isolating switch or the grounding switch, wherein KMD1 controls the isolating switch opening, KMD2 controls the isolating switch closing, and when the KM coil is energized, the corresponding auxiliary points in the control circuit and the motor circuit self-lock, the motor circuit is connected, and the mechanism moves.

[0026] As one implementation method in this embodiment, the process of setting time delay relays and auxiliary relays in parallel in the control circuit includes: connecting time delay relays KT1, KT2, KT3, KT4 and auxiliary relays KA1 and KA2 in parallel across the coils of contactors KMD1 and KMD2. The voltage of the relays and contactors is equal and they work independently. When the contactors are energized or de-energized, the relays act accordingly or reset. When the auxiliary relays are energized, their auxiliary points immediately change state.

[0027] As one implementation method in this embodiment, the process of setting the delay time of the delay relay includes: adjusting the time parameters of the delay relay according to the normal opening and closing action time and the opening and closing interval time, so that Time1 and Time2 are greater than the opening and closing action time, Time3 is greater than the alarm signal response time, and Time4 is greater than the opening and closing interval time of the running-in equipment. The time parameters are manually set by adjusting the adjustment key on the delay relay.

[0028] As one implementation method in this embodiment, the process of triggering the alarm signal includes: when the contactor is energized for more than a set delay time, the normally open contact of the delay relay closes, and the alarm circuit is connected to the alarm signal input. After receiving the closed signal, the alarm is verified by internal logic to prevent false activation. When the response time exceeds 1 second, a valid alarm is output.

[0029] As one implementation method in this embodiment, the process of uploading the alarm signal to the cloud platform via the Internet of Things (IoT) protocol includes: the alarm transmitting the signal to the IoT cloud platform via the MQTT protocol; the cloud platform generating a telephone call, WeChat, or SMS alarm based on the received signal, and recording the alarm time, test subject, and location information.

[0030] Combined with appendix Figure 1 , Figure 2 , Figure 3 Further explanation of the present invention: The invention will be illustrated below with specific examples: In the control circuit of the above switching mechanism, as shown in the appendix Figure 2 As shown, circuits 101-102 have a power input of AC 220V, so the relays are also selected with the same voltage rating. Two sets of normally open and normally closed auxiliary contacts are selected as needed, with an adjustable time range of 0.01~59.99S, which meets the requirements. The core hardware layer of the alarm device uses the Air724UG 4G full network module, mainly combined with the PCB circuit board, antenna, SIM card, and alarm terminals (also known as alarm signal receivers, which are divided into multiple groups, such as...) Figure 1 The circuits 401-402 (with "1-GND" as a group) and others together constitute the alarm logic, as shown in the attached diagram. Figure 3 As shown. The contactor coils KMD1 and KMD2 are attached. Figure 2 At circuits 105-107, time delay relays KT1 and KT2 coils and KA1 and KA2 coils are connected in parallel. The voltages at both ends of the parallel connection are equal, and each component operates independently without affecting the others. If KMD1 and KMD2 fail and disconnect, relays KT1 and KT2, KA1 and KA2 can still work normally. Unlike time delay relays, once the auxiliary relay is energized, the corresponding auxiliary point immediately changes state.

[0031] Normal break-in process has two states: State 1: KMD2 in the closing control circuit 101-113 is energized, the circuit is connected, the auxiliary point changes, the motor circuit is connected, the motor M is energized (rotating forward), and the closing action is performed. After the action is completed, the SL limit switch changes accordingly (open in the opening circuit, closed in the closing circuit). State 2: Contactor KMD1 in the opening control circuit 101-107 is energized, the motor M is energized (reversing), and the opening action is performed. During the break-in period, the engagement and disengagement states of the mechanism change according to a fixed time rhythm. The alarm relays KA1, KA2, KT1, and KT2 follow the energization and de-energization of KMD1 and KMD2.

[0032] If the contactor KMD1 or KMD2 auxiliary points become stuck when the mechanism opens or closes (due to factors such as a faulty reset spring), and the coil remains energized and cannot trip, the delay times Time1 and Time2 of the time delay relays KT1 and KT2 are set according to the rated operating time plus the redundancy time of the mechanism. Time2 = Time1 > the opening and closing time. Otherwise, an erroneous alarm will be triggered during the opening and closing process. When the set time is exceeded, the state of the auxiliary points of the time delay relays KT1 and KT2 will change, the normally open point will close, and the alarm circuit 401-402 will receive a closing signal to trigger the alarm.

[0033] In the event of a power outage or the completion of the break-in period, the delay time Time4 of KT4 is set based on the time required between the start of the opening action and the start of the closing action. The delay time of KT4 must be greater than the opening / closing interval of the break-in equipment; otherwise, an incorrect alarm will occur during the opening / closing transition. KA1 and KA2 serve as status detection relays, and their normally closed contacts are connected in series with the coil of the delay relay KT4. The entire system is connected to a 220V power supply circuit, as shown in the attached diagram. Figure 1 Because under normal running-in conditions, coils KA1 and KA2 will be regularly energized and de-energized, the normally closed contacts of KA1 and KA2 in the circuit will be opened, and the energization delay of KT4 will be continuously reset. When the set number of running-in cycles ends or the power supply to the mechanism action circuit is interrupted, the energization delay of KT4 will not be reset. After the set time is reached, its normally open contact in alarm circuits 401-402 will close, thus triggering an alarm.

[0034] Of course, the entire control circuit also needs to be designed with protection functions, using a time-delay relay KT3 for total timeout protection. The alarm signal reception has an anti-false alarm function with a response time of 1 second, therefore the delay time of KT3, Time3, is greater than 1 second. However, the time should not be too long; setting it to 2-3 seconds is sufficient. This achieves the goal of alarming first and then disconnecting. (See attached image) Figure 1 In circuits 201-202, the normally open contacts of KT1 and KT2 are connected in parallel and then connected in series with coil KT3, whose normally closed contact is connected in series at point 119 in circuit 101-102. When the energization of KT1 and KT2 in circuits 101-102 exceeds the timeout period, the normally open contacts of KT1 and KT2 act as switches, closing circuits 201-202 and triggering the KT3 delay. After the KT3 delay exceeds the timeout period, the entire mechanism control circuit is disconnected, KT1 and KT2 are de-energized and disconnected, circuits 201-202 are disconnected, and the time-delay relay KT3 is de-energized and reset.

[0035] Regarding the alarm time setting, it has an anti-false alarm function when receiving a closed signal. The signal response time is 1 second or longer and is not adjustable. The time to receive a closed signal must exceed 1 second for an effective alarm to sound. The response time test method involves connecting two sets of contacts (A and B) of the switch, the digital display KT coil, and the normally closed contact of the KT in series in an independent 220V AC power circuit. Another set of normally closed contacts of the KT is connected in series with the contacts of the switch (B) and the alarm signal receiving point "1-GND". The time delay relay KT is set to either more than 1 second or less than 1 second. The test procedure is as follows: 1. If the response time is more than 1 second, press the switch and the contacts of switch A and B groups will be connected at the same time (both circuits will be connected at the same time). Observe whether the terminal receives a signal (SMS or telephone alarm).

[0036] 2. Response time less than 1 second, same operation as above.

[0037] The precise action time of the mechanism can be obtained visually using a digital display delay relay or by timing with a stopwatch. For example, after timing, the separation and engagement action time is found to be 1.68 seconds, and the separation and engagement interval of the break-in equipment is 30 seconds. For different mechanisms and break-in equipment, the KT setting time can be manually adjusted according to the actual time cycle using the adjustment key on the delay relay.

[0038] In summary, the following relationship is obtained: Time2 = Time1 > Time of separation and combination (Time2 = Time1 = 3s > 1.68s) Time3>1s (Time3=2s>1s) Time4 > the break-in interval of the equipment (Time4 = 32s > 30s) The specific time settings are as described above, which will satisfy the requirements.

[0039] Through the invention and design of the above-described device, unmanned online monitoring has been achieved in the automated break-in fault monitoring of switching mechanisms. When electrical or mechanical faults occur in the break-in test object, the device immediately sends a message to a mobile phone alarm via the network, accurately identifying the problem and protecting the test object, greatly increasing the quality and reliability of the life test. In terms of cost, labor costs are almost eliminated, and the total material cost for relays, alarms, switches, power supplies, etc., is only a thousand yuan.

[0040] Based on this, the present invention provides a method for automated break-in fault monitoring of switching mechanisms. Through this method and device, users can obtain test data more conveniently and ensure the accuracy of test results, thereby improving quality and accuracy, significantly enhancing monitoring capabilities, reducing labor costs, and protecting the test objects. Furthermore, this method and device can be extended to life break-in tests of various products, making it suitable for most manufacturers and testing stations.

[0041] Example 2 In this embodiment, a computer terminal device is provided, including: One or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the steps of the above-described method for monitoring automatic break-in faults in switching mechanisms.

[0042] In this embodiment, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the above-described method for monitoring the automatic break-in fault of a switching mechanism.

[0043] In this embodiment, an electronic device is also provided, including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to perform the steps of the above-described method for monitoring the automatic break-in fault of a switching mechanism.

[0044] In this embodiment, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the above-described method for monitoring automatic break-in faults in a switching mechanism.

[0045] The aforementioned program can run on a processor or be stored in memory (or a computer-readable medium). Computer-readable media includes both permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random-access memory (SRAM), dynamic random-access memory (DRAM), other types of random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0046] These computer programs may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes can be implemented by different modules for different steps.

[0047] This embodiment provides such a device or system. The device, referred to as a device for monitoring automatic break-in faults in switching mechanisms, includes: Power input circuit, used to provide AC power; The switching mechanism control circuit, connected to the power input circuit, includes a trip contactor coil and a closing contactor coil; The fault monitoring circuit, connected to the switch mechanism control circuit, includes multiple time-delay relays and auxiliary relays, used to monitor the energization status of the opening contactor coil and the closing contactor coil. An alarm circuit, connected to the fault monitoring circuit, is used to output an alarm signal when the fault monitoring circuit detects a fault. A protection control circuit, connected to the fault monitoring circuit and the switching mechanism control circuit, is used to disconnect the switching mechanism control circuit when the fault monitoring circuit detects a fault.

[0048] As one implementation method in this embodiment, the fault monitoring circuit includes: The first time-delay relay has its coil connected in parallel with the coil of the trip contactor; The second time-delay relay has its coil connected in parallel with the closing contactor coil; The first auxiliary relay has its coil connected in parallel with the coil of the trip contactor; The second auxiliary relay has its coil connected in parallel with the closing contactor coil; The coil of the third time-delay relay is connected in parallel with the normally open contacts of the first and second time-delay relays; The fourth time-delay relay has its coil connected in series with the normally closed contacts of the first auxiliary relay and the second auxiliary relay.

[0049] As one implementation method in this embodiment, the alarm circuit includes: The alarm has multiple sets of alarm signal input terminals, each set of alarm signal input terminals including a positive terminal and a negative terminal; The positive terminal is connected to the normally open contacts of the first, second, and fourth time-delay relays in the fault monitoring circuit, and the negative terminal is grounded. The alarm also includes an Internet of Things (IoT) communication module, which is used to upload alarm signals to the cloud platform via IoT protocols.

[0050] As one implementation method in this embodiment, the protection control circuit includes: Third time-delay relay; The coil of the third time-delay relay is connected in parallel with the normally open contacts of the first and second time-delay relays in the fault monitoring circuit, so that the coil of the third time-delay relay is energized when the normally open contact of the first or second time-delay relay is closed. The normally closed contact of the third time-delay relay is connected in series in the power input circuit of the switching mechanism control circuit, and is used to disconnect the power input circuit when the third time-delay relay is energized for a timeout period.

[0051] As one embodiment of this invention, the switching mechanism control circuit includes: The tripping control circuit includes a tripping contactor coil. The closing control circuit includes a closing contactor coil. An electric motor is connected to the opening contactor coil and the closing contactor coil. When the opening contactor coil is energized, the motor reverses to perform the opening action, and when the closing contactor coil is energized, the motor rotates forward to perform the closing action. Limit switches, associated with the opening control circuit and the closing control circuit, are used to switch the circuit state after the opening or closing action is completed.

[0052] As one implementation method in this embodiment, the power input circuit provides AC 220V power and is connected to the control main circuit input point of the switching mechanism control circuit, the power supply terminals of all relay coils of the fault monitoring circuit, the power input terminal of the alarm circuit, and the power supply terminal of the third time-delay relay coil of the protection control circuit through a power distribution line.

[0053] The system or apparatus is used to implement the functions of the methods in the above embodiments. Each module in the system or apparatus corresponds to each step in the method, as has been described in the method and will not be repeated here.

[0054] The above-described implementation method solves the problem of automatic break-in fault monitoring of switching mechanisms in related technologies, thereby ensuring that the problems existing in the prior art are resolved.

[0055] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for monitoring automatic break-in faults in switching mechanisms, characterized in that, Includes the following steps: S1. Analyze the control circuit of the switching mechanism and identify the operating cycle of the opening and closing contactor; S2. A time-delay relay and an auxiliary relay are connected in parallel in the control circuit to monitor the energized and de-energized states of the contactor. S3. Set the delay time of the delay relay to be greater than the normal opening and closing operation time or the opening and closing interval time; S4. When the contactor is energized for longer than the delay time, an alarm signal is triggered; S5. Upload the alarm signal to the cloud platform via the Internet of Things protocol to achieve remote alarm.

2. The method according to claim 1, characterized in that, The process of analyzing the control circuit of the switching mechanism includes: analyzing the electrical circuit of the GIS switching mechanism according to the GB / T 5094 standard drawings, identifying the AC contactor KMD or KME as a component of the electrical circuit of the mechanism body, the contactor controlling the opening and closing of the isolating switch or the grounding switch, wherein KMD1 controls the isolating switch opening, KMD2 controls the isolating switch closing, when the KM coil is energized, the corresponding auxiliary points in the control circuit and the motor circuit self-lock, the motor circuit is connected, and the mechanism moves.

3. The method according to claim 1, characterized in that, The process of setting time delay relays and auxiliary relays in parallel in the control circuit includes: connecting time delay relays KT1, KT2, KT3, KT4 and auxiliary relays KA1 and KA2 in parallel across the coils of contactors KMD1 and KMD2. The voltage of the relays and contactors is equal and they work independently. When the contactors are energized or de-energized, the relays will act or reset accordingly. When the auxiliary relays are energized, their auxiliary points will immediately change state.

4. The method according to claim 1, characterized in that, The process of setting the delay time of the delay relay includes: adjusting the time parameters of the delay relay according to the normal opening and closing action time and the opening and closing interval time, so that Time1 and Time2 are greater than the opening and closing action time, Time3 is greater than the alarm signal response time, and Time4 is greater than the opening and closing interval time of the break-in equipment. The time parameters are manually set by adjusting the adjustment key on the delay relay.

5. The method according to claim 1, characterized in that, The process of triggering the alarm signal includes: when the contactor is energized for more than the set delay time, the normally open contact of the delay relay closes, and the alarm circuit is connected. The alarm circuit is connected to the alarm signal input. After receiving the closed signal, the alarm is verified by internal logic to prevent false activation. When the response time exceeds 1 second, a valid alarm is output.

6. The method according to claim 1, characterized in that, The process of uploading alarm signals to the cloud platform via IoT protocol includes: the alarm transmitting signals to the IoT cloud platform via MQTT protocol, the cloud platform generating telephone call, WeChat or SMS alarms based on the received signals, and recording the alarm time, test subject and location information.

7. A device for monitoring automatic break-in faults in switching mechanisms, characterized in that, The apparatus for implementing the method according to any one of claims 1-6 comprises: Power input circuit, used to provide AC power; The switching mechanism control circuit, connected to the power input circuit, includes a trip contactor coil and a closing contactor coil; The fault monitoring circuit, connected to the switch mechanism control circuit, includes multiple time-delay relays and auxiliary relays, used to monitor the energization status of the opening contactor coil and the closing contactor coil. An alarm circuit, connected to the fault monitoring circuit, is used to output an alarm signal when the fault monitoring circuit detects a fault. A protection control circuit, connected to the fault monitoring circuit and the switching mechanism control circuit, is used to disconnect the switching mechanism control circuit when the fault monitoring circuit detects a fault.

8. A computer terminal device, characterized in that, include: One or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the steps of the method as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

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