High-reliability live replacement of signal light device and method

Abstract

This invention relates to the field of live-line replacement technology for power installations, and discloses a highly reliable live-line replacement device and method for signal lights, aiming to improve the safety and reliability of signal light replacement operations. The device includes a covered enclosure with an integrated display screen, positive and negative terminals and grounding wiring sockets, an audible and visual alarm, and an operating panel for a miniature air switch. Inside the enclosure are a control unit and a power supply unit, along with a dedicated connecting cable assembly. The control circuit board of the control unit integrates voltage detection and display modules. The power supply unit adopts a dual power supply mode combining a battery and a charging management module. The fully insulated alligator clips of the connecting cable assembly are conductive only at the clamping points, with the rest insulated. The method completes the operation through the steps of starting the device, constructing a grounding protection circuit, establishing and verifying the voltage monitoring circuit pole by pole, replacing the signal light while it is energized, restoring the wiring in sequence, and finally storing the device. The voltage is monitored in real time throughout the process, and abnormal audible and visual alarms are set.

Description

Technical Field

[0001] This invention relates to the field of live-line replacement technology for power equipment, and more specifically, to a highly reliable live-line replacement device and method for signal lights. Background Technology

[0002] The DC feeder panel is the core power distribution equipment in the DC power supply system of a substation. It is responsible for safely and reliably distributing the stable DC power output from battery banks or charging modules to various secondary loads such as protection, control, and signaling systems throughout the substation. DC feeder circuit breakers are installed on each outgoing circuit of the DC feeder panel and are the core protection components of the DC power distribution network. Their reliable operation directly affects whether a local fault will escalate into a substation-wide DC power outage. DC feeder indicator lights are installed on the DC feeder panel panel and are associated with the status of the corresponding feeder circuit breaker, providing operators with intuitive indication of circuit continuity.

[0003] When a signal light on a DC feeder panel malfunctions, there are two traditional options: First, disconnect the DC feeder circuit breaker for a planned power outage replacement. This involves disconnecting the relevant DC feeder circuit breaker or shutting down the upstream primary equipment. While this method ensures operational safety, it causes a short-term power outage to critical loads, reducing power supply reliability and affecting user power consumption. Furthermore, some DC feeders power protection devices or control circuits; disconnecting the circuit breaker will cause these devices to lose power, leaving the equipment unprotected. This situation violates electrical safety regulations and is therefore not permitted. Second, replace the signal light directly without interrupting power. Operating in a confined space greatly increases the risk of accidental contact with tools or wire ends, causing short circuits between positive and negative terminals, or between terminals. The instantaneous short-circuit current will trip the DC circuit breaker in this circuit. If this circuit powers a protection device, it will cause a protection failure, putting the corresponding primary equipment at significant risk of unprotected operation. In this case, if a system failure occurs, it could trigger a power grid safety incident. Therefore, existing technologies face a dilemma: power outages disrupt power supply for replacement; direct live replacement carries extremely high risks and lacks reliable safety isolation measures. Thus, there is an urgent need to provide a highly reliable live-line replacement device and method to solve these problems. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a technical solution for safely and reliably replacing feeder panel indicator lights without interrupting power to the DC system. Through innovative design, it fundamentally eliminates the risk of short circuits caused by human error or accidental contact during the replacement process, ensuring continuous and stable DC power supply during operation and preventing abnormal power loss of protection devices. This significantly improves the operational safety, power supply reliability, and maintenance efficiency of the substation's DC system.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A highly reliable live-line signal light replacement device includes a housing with a cover, an operation panel on the housing, a control unit and a power supply unit built into the housing, and a connecting cable assembly.

[0007] The operation panel integrates a display screen, a positive terminal socket, a negative terminal socket, a grounding terminal socket, an audible and visual alarm, and a miniature air switch. The audible and visual alarm is equipped with a reset button, which is used to manually deactivate the alarm. The miniature air switch serves as the power switch for the device.

[0008] The control unit includes a control circuit board, which integrates a voltage detection module, a display module, a control module, and an audible and visual alarm module. The voltage detection module is electrically connected to the positive and negative terminal terminals and is used to collect the voltage to ground of the positive and negative terminals of the signal light. The display module is electrically connected to the display screen. The control module is electrically connected to the voltage detection module, the display module, and the audible and visual alarm module, respectively.

[0009] The power supply unit includes a battery and a charging management module. The battery is electrically connected to the charging management module, and the charging management module is also electrically connected to a power interface located on the operation panel.

[0010] The connecting wire assembly includes one positive test wire, one negative test wire, and one ground test wire. One end of each test wire is a fully insulated alligator clip. Only the inside of the clip is a conductive area, while the rest of the conductive parts are fully wrapped with heat-shrink tubing.

[0011] As a preferred embodiment of the present invention, the miniature air switch is connected in series between the charging management module and the control circuit board.

[0012] In a preferred embodiment of the present invention, the control unit and the power supply unit are separated by an insulating shielding partition.

[0013] As a preferred embodiment of the present invention, the connecting wire assembly can be stored in the accessory storage area provided inside the box cover. The plug-in connector of the positive test wire is adapted to the positive wiring socket, the plug-in connector of the negative test wire is adapted to the negative wiring socket, and the plug-in connector of the grounding test wire is adapted to the grounding wiring socket. The positive test wire is a brown test wire, the negative test wire is a blue test wire, and the grounding test wire is a black test wire.

[0014] This invention also provides a highly reliable method for replacing signal lights while they are powered on, comprising the following steps:

[0015] S1. Start the live-line replacement device, so that the voltage detection module, display module and audible and visual alarm module of the live-line replacement device enter the working ready state;

[0016] S2. Connect the plug-in connector of the grounding test line to the grounding wiring socket, and firmly clamp the fully insulated alligator clip of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs.

[0017] S3. Connect the plug-in connector of the positive test lead to the positive wiring socket, disconnect the positive wiring terminal of the fault indicator light, and immediately clamp the fully insulated alligator clip of the positive test lead firmly to the conductive part of the positive wire of the indicator light that is detached from the terminal plate. Observe the positive voltage value to ground through the display screen. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, confirm that the positive monitoring circuit is reliably connected.

[0018] S4. After the positive monitoring circuit is reliably connected, connect the plug-in connector of the negative test line to the negative wiring socket, disconnect the negative wiring terminal of the fault indicator light, and immediately clamp the fully insulated alligator clip of the negative test line firmly to the conductive part of the negative wire of the indicator light that is detached from the terminal plate. Observe the negative voltage value to ground through the display screen. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, confirm that the negative monitoring circuit is reliably connected.

[0019] S5. After the positive and negative monitoring circuits are reliably connected, remove the fault indicator light and install a new indicator light. During the replacement process, the device monitors the voltage of the positive and negative poles to ground in real time. If the voltage is abnormal, the audible and visual alarm will be triggered immediately.

[0020] S6. After the new traffic light is installed, first disconnect the fully insulated alligator clip of the negative test line from the negative wire, and immediately after disconnection, tighten the negative wire to the negative terminal of the new traffic light. Manually reset the audible and visual alarm using the reset button. Then disconnect the fully insulated alligator clip of the positive test line from the positive wire, and immediately after disconnection, tighten the positive wire to the positive terminal of the new traffic light. Manually reset the audible and visual alarm using the reset button.

[0021] S7. Disconnect and store the grounding test line, positive test line, and negative test line in sequence, turn off the miniature air switch, organize the work equipment, and complete the signal light replacement.

[0022] As a preferred embodiment of the present invention, S1 specifically includes the following steps:

[0023] S11. Close the miniature air switch to start the live replacement device. If an external power supply is available on site, the charging management module is connected to the external AC power supply to simultaneously power the control unit and charge the battery. If no external power supply is available on site, the battery serves as a backup power supply and powers the control unit through the output of the charging management module to ensure normal device startup.

[0024] S12. The control module automatically completes the initialization of the core parameters of the algorithm. First, it clarifies the specific definitions of each physical quantity parameter, including the rated voltage to ground of the DC feeder screen signal light circuit, the instantaneous value of the positive and negative pole real-time voltage to ground, the short-time average effective value of the positive and negative pole voltage to ground, the voltage fluctuation coefficient of the positive and negative pole, the voltage safety threshold, the positive and negative pole alarm trigger judgment value, and the relevant definitions of the on / off state of the grounding test line circuit.

[0025] S13. The control module calculates and stores the voltage safety threshold according to the preset standard. When calculating, the absolute value of the rated voltage to ground of the negative pole must be taken.

[0026] S14. The control module presets core judgment criteria, among which the judgment criteria for voltage stability is that the voltage fluctuation coefficients of both positive and negative poles do not exceed five percent. The alarm triggering logic is executed according to the relevant requirements in the subsequent steps. After all parameters are initialized, the voltage detection module, display module and audible and visual alarm module simultaneously enter the working ready state, and the display screen shows the prompt message "The device is ready and can be operated".

[0027] As a preferred embodiment of the present invention, S2 includes the following steps:

[0028] S21. Connect the plug-in connector of the grounding test lead to the grounding wiring socket on the device operation panel, ensuring that the connector is in tight contact and without looseness, so as to achieve a reliable electrical connection.

[0029] S22. Securely clamp the fully insulated alligator clip at the other end of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs. The clamping surfaces must be completely in contact, without any oxide layer obstruction, and without any looseness. Gently pull the test line to confirm that the mechanical connection is reliable.

[0030] S23. The control module detects the continuity status of the grounding test line loop in real time and executes the corresponding judgment logic. If the loop is determined to be on, the corresponding area of ​​the display screen will show a normal prompt, the grounding protection loop construction will be completed and the next operation will be carried out. If the loop is determined to be off or loose, the control module will immediately drive the audible and visual alarm module to trigger the alarm, the display screen will show an abnormal prompt, and the operator will need to readjust the alligator clip clamping status until the control module determines that the loop is on.

[0031] As a preferred embodiment of the present invention, S3 includes the following steps:

[0032] S31. Connect the plug-in connector of the positive test lead to the positive wiring socket on the device operation panel. After the control module receives the connection signal, it will automatically start the voltage detection module and enter the positive voltage acquisition mode.

[0033] S32. Carefully remove the positive terminal of the faulty signal light using insulated tools. After removal, immediately securely and completely clamp the fully insulated alligator clip of the positive test lead onto the conductive part of the positive wire of the signal light that has been removed from the terminal block, ensuring that there is no exposed conductive part in the clip to avoid accidental contact that could cause a short circuit.

[0034] S33. The voltage detection module continuously collects the real-time voltage of the positive terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time.

[0035] S34. The control module calculates the short-time average effective value of the positive terminal to ground voltage according to the preset logic to eliminate the instantaneous voltage fluctuations caused by electromagnetic interference on site and ensure the accuracy of the voltage judgment benchmark.

[0036] S35. The control module calculates the positive voltage fluctuation coefficient according to the preset logic, which represents the stability of the real-time positive voltage.

[0037] S36. The control module performs positive alarm trigger determination according to preset binary logic, and clarifies the determination conditions for alarm triggering and non-triggering.

[0038] S37. Perform the corresponding operation according to the judgment result. If no abnormality is judged, observe the positive terminal to ground voltage value through the display screen. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, the control module determines that the positive terminal monitoring circuit connection is reliable and proceeds to the next operation. If an abnormality is judged, the control module immediately drives the audible and visual alarm module to trigger the alarm. The operator must immediately check and reinforce the alligator clip clamping status until the control module determines that there is no abnormality.

[0039] As a preferred embodiment of the present invention, S4 includes the following steps:

[0040] S41. This step is a serial operation and can only be executed after the control module determines that the positive electrode monitoring circuit is reliably connected. Its quantitative calculation and judgment logic are completely consistent with the positive electrode monitoring circuit to ensure the standardization and safety of operation.

[0041] S42. Connect the plug-in connector of the negative test lead to the negative wiring socket on the device operation panel. The control module starts the voltage detection module and enters the negative voltage acquisition mode.

[0042] S43. Carefully remove the negative terminal of the faulty signal light using insulated tools. Immediately after removal, securely and completely clamp the fully insulated alligator clip of the negative test lead to the conductive part of the negative wire of the signal light that has been removed from the terminal block.

[0043] S44. The voltage detection module continuously collects the real-time voltage of the negative terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time.

[0044] S45. The control module calculates the short-time average effective value of the negative electrode voltage to ground and the negative electrode voltage fluctuation coefficient according to the same preset logic as the positive electrode monitoring circuit.

[0045] S46. The control module executes the negative alarm trigger determination according to the same preset binary logic as the positive monitoring circuit;

[0046] S47. Perform the corresponding operation according to the judgment result. If there is no abnormality, observe the negative terminal to ground voltage value through the display screen. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, the control module determines that the negative terminal monitoring circuit is reliably connected. If there is an abnormality, the control module immediately drives the audible and visual alarm module to trigger the alarm. The operator must immediately reinforce the alligator clip clamping state until the control module determines that there is no abnormality.

[0047] After both the positive and negative monitoring circuits (S48) are deemed reliable, the control module drives the device into a full-process dynamic monitoring mode, cyclically performing positive and negative voltage acquisition, related numerical calculations, and alarm judgments at a preset frequency, and refreshing the voltage data on the display screen in real time.

[0048] As a preferred embodiment of the present invention, the real-time monitoring of the positive and negative pole voltages to ground in S5 specifically involves:

[0049] Throughout the installation process, the device monitors the positive and negative voltages to ground in real time through the voltage detection module. The control module maintains dynamic monitoring throughout the process and works in conjunction with the voltage detection module to cyclically perform positive and negative voltage acquisition, related value calculation, and alarm trigger determination at a preset frequency.

[0050] If the voltage becomes abnormal due to loose alligator clips or wire displacement during installation, the control module will immediately trigger the audible and visual alarm. The operator must immediately stop the replacement operation, first check and restore the clamping status of the test lead of the corresponding pole, and continue the operation until the voltage returns to normal and the audible and visual alarm is normal.

[0051] After the new traffic light is mechanically fixed, check that the installation position is unobstructed and the wires are not tangled. Confirm that the display screen still shows stable positive and negative voltages and no alarms. The replacement of the traffic light body is then complete.

[0052] The beneficial technical effects of this invention are:

[0053] By reliably clamping the bare wire ends and monitoring the voltage in real time, the device fundamentally eliminates the possibility of short circuits between the positive and negative poles or to ground during the replacement process. This avoids the risk of DC circuit breaker tripping and power failure of protection devices, thus eliminating potential power grid safety hazards. Structurally and procedurally, it eliminates various short circuit risks caused by human operation or accidental contact during the replacement process, preventing DC feeder circuit breaker tripping and power failure of protection devices, and eliminating potential power grid safety hazards. It successfully solves the problem of having to shut down the power supply to replace signal lights on critical DC feeder circuits, achieving truly safe, uninterrupted maintenance.

[0054] Through the integrated design of voltage detection module, control module, and audible and visual alarm module, high-precision, real-time acquisition and split-screen display of the positive and negative voltage of the signal light to ground are achieved. A safety threshold of 85% of the rated voltage is preset. When the connection is loose and the voltage drops, the audible and visual alarm is triggered immediately, realizing the immediate warning of abnormal conditions and turning passive protection into active warning.

[0055] By following a serialized procedure—first grounding, then establishing and confirming the positive monitoring circuit, and finally establishing and confirming the negative monitoring circuit—the risk of simultaneous exposure of both polar conductors is minimized. Reliable grounding also establishes a fundamental grounding protection barrier for the operation, preventing short circuits to ground from a procedural standpoint. Alarms triggered when disconnecting the test lead clamps require manual reset to be cleared, ensuring operators have a clear understanding of the operational status and preventing operational errors due to negligence. Attached Figure Description

[0056] Figure 1 This is a structural diagram of the live signal light replacement device of the present invention.

[0057] Figure 2 This is a block diagram of the module structure of the control circuit board in this invention.

[0058] Figure 3 This is a specific circuit diagram of the control circuit of the present invention.

[0059] Figure 4 This is a structural block diagram of the battery power supply module in this invention.

[0060] Figure 5 This is a schematic diagram of the test line structure in this invention.

[0061] Figure 6 This is a schematic diagram of the standard operating procedure of the present invention.

[0062] In the diagram: 10. Cabinet; 20. Cabinet lid; 21. Accessory storage area; 1. Power interface; 2. Miniature circuit breaker; 3. Positive terminal plug; 4. Negative terminal plug; 5. Grounding plug; 6. Display screen; 7. Warning light; 8. Buzzer; 9. Reset button. Detailed Implementation

[0063] In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0064] Combination Figure 1-6 The present invention provides the following embodiments:

[0065] Example 1:

[0066] A highly reliable live-line signal light replacement device includes a housing 10 with a cover 20, an operation panel on the housing 10, a control unit and a power supply unit built into the housing 10, and a connecting cable assembly.

[0067] The operation panel integrates a display screen 6, a positive terminal socket 3, a negative terminal socket 4, a grounding terminal socket 5, an audible and visual alarm, and a miniature air switch 2. The audible and visual alarm is equipped with a reset button 9, which is used to manually deactivate the alarm state of the audible and visual alarm. The miniature air switch 2 serves as the power switch for the device.

[0068] The control unit includes a control circuit board, which integrates a voltage detection module, a display module, a control module, and an audible and visual alarm module. The voltage detection module is electrically connected to the positive terminal 3 and the negative terminal 4 to collect the voltage to ground of the positive and negative terminals of the signal light. The display module is electrically connected to the display screen 6. The control module is electrically connected to the voltage detection module, the display module, and the audible and visual alarm module, respectively.

[0069] The power supply unit includes a battery and a charging management module. The battery is electrically connected to the charging management module, and the charging management module is also electrically connected to the power interface 1 located on the operation panel.

[0070] The connecting wire assembly includes one positive test wire, one negative test wire, and one ground test wire. One end of each test wire is a fully insulated alligator clip. Only the inside of the clip is a conductive area, while the rest of the conductive parts are fully wrapped with heat-shrink tubing.

[0071] Furthermore, the miniature air switch 2 is connected in series between the charging management module and the control circuit board. For example... Figure 4 As shown, the miniature air switch 2 is the power supply switch for the device, and it can control the device regardless of the power supply method.

[0072] Furthermore, the control unit and the power supply unit are separated by an insulating shielding partition. This insulating shielding partition is a structural design that physically isolates and electromagnetically shields the control circuit board area from the battery power supply area, aiming to ensure monitoring accuracy and avoid internal power supply interference.

[0073] Furthermore, the connecting cable assembly can be stored in the accessory storage area 21 provided inside the cover 20. The pluggable connector of the positive test cable is compatible with the positive wiring socket 3, the pluggable connector of the negative test cable is compatible with the negative wiring socket 4, and the pluggable connector of the grounding test cable is compatible with the grounding wiring socket 5. The positive test cable is brown, the negative test cable is blue, and the grounding test cable is black. Specifically, it is convenient to store and carry, the colors correspond and are not easily confused, and the test cables are pluggable connected to the sockets.

[0074] Example 2:

[0075] A highly reliable method for replacing traffic lights while they are powered on includes the following steps:

[0076] S1. Start the live-line replacement device, so that the voltage detection module, display module and audible and visual alarm module of the live-line replacement device enter the working ready state;

[0077] S2. Connect the plug-in connector of the grounding test line to the grounding wiring socket 5, and firmly clamp the fully insulated alligator clip of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs.

[0078] S3. Connect the plug-in connector of the positive test line to the positive wiring socket 3, disconnect the positive wiring terminal of the fault signal light, and immediately clamp the fully insulated alligator clip of the positive test line firmly to the conductive part of the positive wire of the signal light that is detached from the terminal plate. Observe the positive voltage value to ground through the display screen 6. When the voltage stabilizes near the rated voltage and the sound and light alarm does not alarm abnormally, confirm that the positive monitoring circuit is reliably connected.

[0079] S4. After the positive monitoring circuit is reliably connected, connect the plug-in connector of the negative test line to the negative wiring socket 4, disconnect the negative wiring terminal of the fault signal light, and immediately clamp the fully insulated alligator clip of the negative test line firmly to the conductive part of the negative wire of the signal light that is detached from the terminal plate. Observe the negative voltage value to ground through the display screen 6. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, confirm that the negative monitoring circuit is reliably connected.

[0080] S5. After the positive and negative monitoring circuits are reliably connected, remove the fault indicator light and install a new indicator light. During the replacement process, the device monitors the voltage of the positive and negative poles to ground in real time. If the voltage is abnormal, the audible and visual alarm will be triggered immediately.

[0081] S6. After the new traffic light is installed, first disconnect the fully insulated alligator clip of the negative test line from the negative wire, and immediately after disconnection, tighten the negative wire to the negative terminal of the new traffic light. Manually reset the audible and visual alarm using the reset button 9. Then disconnect the fully insulated alligator clip of the positive test line from the positive wire, and immediately after disconnection, tighten the positive wire to the positive terminal of the new traffic light. Manually reset the audible and visual alarm using the reset button 9.

[0082] S7. Disconnect and store the grounding test line, positive test line, and negative test line in sequence, turn off the miniature air switch 2, organize the work equipment, and complete the signal light replacement.

[0083] Furthermore, S1 specifically includes the following steps:

[0084] S11. Close the miniature air switch 2 to start the live replacement device. If there is an external power supply on site, the charging management module is connected to the external AC power supply to simultaneously power the control unit and charge the battery. If there is no external power supply on site, the battery serves as a backup power supply and powers the control unit through the output of the charging management module to ensure the device starts normally.

[0085] S12. The control module automatically completes the initialization of the core parameters of the algorithm. First, it clarifies the specific definitions of each physical quantity parameter, including the rated voltage to ground of the DC feeder screen signal light circuit, the instantaneous value of the positive and negative pole real-time voltage to ground, the short-time average effective value of the positive and negative pole voltage to ground, the voltage fluctuation coefficient of the positive and negative pole, the voltage safety threshold, the positive and negative pole alarm trigger judgment value, and the relevant definitions of the on / off state of the grounding test line circuit.

[0086] S13. The control module calculates and stores the voltage safety threshold according to the preset standard. When calculating, the absolute value of the rated voltage to ground of the negative pole must be taken.

[0087] S14. The control module presets core judgment criteria, among which the judgment criteria for voltage stability is that the voltage fluctuation coefficients of both positive and negative poles do not exceed five percent. The alarm triggering logic is executed according to the relevant requirements in the subsequent steps. After all parameters are initialized, the voltage detection module, display module and audible and visual alarm module simultaneously enter the working ready state, and the display screen 6 displays the prompt message "The device is ready and can be operated".

[0088] The device's power supply reliability is ensured under different field conditions by using a dual power supply mode of external power supply and battery, providing continuous equipment power support for live-line work; the control module completes algorithm parameter initialization, voltage safety threshold calculation and stability judgment standard preset, establishing a unified quantitative judgment benchmark for subsequent voltage acquisition, fluctuation analysis and abnormal alarm, eliminating the subjectivity of manual judgment; the ready prompt on display screen 6 provides operators with a clear operation start signal, ensuring that all subsequent voltage monitoring and alarm actions are supported by accurate parameter logic, ensuring the scientific nature of operation judgment.

[0089] Furthermore, S2 includes the following steps:

[0090] S21. Connect the plug-in connector of the grounding test lead to the grounding wiring socket 5 on the device operation panel, ensuring that the connector is in tight contact and without looseness, so as to achieve a reliable electrical connection.

[0091] S22. Securely clamp the fully insulated alligator clip at the other end of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs. The clamping surfaces must be completely in contact, without any oxide layer obstruction, and without any looseness. Gently pull the test line to confirm that the mechanical connection is reliable.

[0092] S23. The control module detects the continuity status of the grounding test line circuit in real time and executes the corresponding judgment logic. If the circuit is determined to be on, the corresponding area of ​​the display screen 6 will display a normal prompt, and the grounding protection circuit will be constructed and the next operation will be carried out. If the circuit is determined to be off or loose, the control module will immediately drive the audible and visual alarm module to trigger the alarm, and the display screen 6 will display an abnormal prompt. The operator needs to readjust the alligator clip clamping status until the control module determines that the circuit is on.

[0093] The grounding protection circuit is the basic safety protection structure for live-line work of electrical equipment. This step ensures the continuity of the grounding circuit from both electrical and mechanical dimensions through the reliable electrical connection of the plug-in connector and the grounding wiring socket 5, and the firm mechanical connection of the fully insulated alligator clip and the dedicated grounding copper busbar. The control module detects the continuity of the circuit in real time and sets an abnormal alarm mechanism, which can promptly detect and eliminate safety hazards such as poor grounding contact and circuit disconnection from the source, and avoid accidents such as electric shock and equipment short circuit caused by grounding failure during subsequent live-line operations, thus laying a solid foundation for safety protection during the entire live-line operation.

[0094] Furthermore, S3 includes the following steps:

[0095] S31. Connect the plug-in connector of the positive test lead to the positive wiring socket 3 on the device operation panel. After the control module receives the connection signal, it will automatically start the voltage detection module and enter the positive voltage acquisition mode.

[0096] S32. Carefully remove the positive terminal of the faulty signal light using insulated tools. After removal, immediately securely and completely clamp the fully insulated alligator clip of the positive test lead onto the conductive part of the positive wire of the signal light that has been removed from the terminal block, ensuring that there is no exposed conductive part in the clip to avoid accidental contact that could cause a short circuit.

[0097] S33. The voltage detection module continuously collects the real-time voltage of the positive terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time.

[0098] S34. The control module calculates the short-time average effective value of the positive terminal to ground voltage according to the preset logic to eliminate the instantaneous voltage fluctuations caused by electromagnetic interference on site and ensure the accuracy of the voltage judgment benchmark.

[0099] S35. The control module calculates the positive voltage fluctuation coefficient according to the preset logic, which represents the stability of the real-time positive voltage.

[0100] S36. The control module performs positive alarm trigger determination according to preset binary logic, and clarifies the determination conditions for alarm triggering and non-triggering.

[0101] S37. Perform the corresponding operation according to the judgment result. If there is no abnormality, observe the positive voltage value to ground through the display screen 6. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, the control module determines that the positive monitoring circuit is reliably connected and proceeds to the next operation. If there is an abnormality, the control module immediately drives the audible and visual alarm module to trigger the alarm. The operator must immediately check and reinforce the alligator clip clamping status until the control module determines that there is no abnormality.

[0102] Following the safety principles of sequential operation and step-by-step verification during live-line work, priority is given to monitoring the positive circuit to avoid the risk of short circuits caused by simultaneous operation of both positive and negative poles. Insulated tools are used to eliminate the risk of electric shock to personnel, and the fully insulated alligator clips with no exposed conductors prevent accidental contact and short circuits between the wires and surrounding equipment. The continuous acquisition of voltage data by the voltage detection module and the calculation of the average effective value by the control module effectively filter out instantaneous voltage fluctuations caused by electromagnetic interference, improving the accuracy of voltage detection. The voltage fluctuation coefficient provides a quantitative representation of voltage stability. Pre-set alarm judgment logic accurately identifies problems such as loose connections and poor contact in the positive monitoring circuit, promptly triggering alarms and requiring reinforcement to ensure the reliability of the positive monitoring circuit and establishing a safe and standardized operational foundation for subsequent monitoring of the negative circuit.

[0103] Furthermore, S4 includes the following steps:

[0104] S41. This step is a serial operation and can only be executed after the control module determines that the positive electrode monitoring circuit is reliably connected. Its quantitative calculation and judgment logic are completely consistent with the positive electrode monitoring circuit to ensure the standardization and safety of operation.

[0105] S42. Connect the plug-in connector of the negative test lead to the negative wiring socket 4 on the device operation panel. The control module starts the voltage detection module and enters the negative voltage acquisition mode.

[0106] S43. Carefully remove the negative terminal of the faulty signal light using insulated tools. Immediately after removal, securely and completely clamp the fully insulated alligator clip of the negative test lead to the conductive part of the negative wire of the signal light that has been removed from the terminal block.

[0107] S44. The voltage detection module continuously collects the real-time voltage of the negative terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time.

[0108] S45. The control module calculates the short-time average effective value of the negative electrode voltage to ground and the negative electrode voltage fluctuation coefficient according to the same preset logic as the positive electrode monitoring circuit.

[0109] S46. The control module executes the negative alarm trigger determination according to the same preset binary logic as the positive monitoring circuit;

[0110] S47. Perform the corresponding operation according to the judgment result. If there is no abnormality, observe the negative terminal to ground voltage value through the display screen 6. When the voltage stabilizes near the rated voltage and the audible and visual alarm does not alarm abnormally, the control module determines that the negative terminal monitoring circuit is reliably connected. If there is an abnormality, the control module immediately drives the audible and visual alarm module to trigger the alarm. The operator must immediately reinforce the alligator clip clamping state until the control module determines that there is no abnormality.

[0111] After both the positive and negative monitoring circuits (S48) are deemed reliable, the control module drives the device into a full-process dynamic monitoring mode, cyclically performing positive and negative voltage acquisition, related value calculation, and alarm judgment at a preset frequency, and refreshing the voltage data on the display screen 6 in real time.

[0112] The system adopts a serialized operation mode, performing negative operation only after the positive monitoring circuit is confirmed to be reliable. This avoids the risk of short circuits caused by simultaneously disconnecting the positive and negative terminals from the terminal blocks, complying with safety regulations for live-line work. It uses unified quantitative calculation and alarm judgment logic with the positive monitoring circuit, ensuring consistency in positive and negative monitoring standards and improving operational standardization and the accuracy of judgment results. After both positive and negative monitoring circuits are verified to be reliable, the system enters a full-process dynamic monitoring mode, switching from step-by-step static monitoring to full-process dynamic monitoring. This enables real-time acquisition, calculation, judgment, and updating of positive and negative voltage data to ground, allowing operators to monitor the circuit voltage status in real time. This provides continuous and comprehensive voltage monitoring support for subsequent live-line replacement of signal lights, and timely identification of potential voltage anomalies during the replacement process.

[0113] Furthermore, the real-time monitoring of the positive and negative voltages to ground in S5 specifically includes:

[0114] Throughout the installation process, the device monitors the positive and negative voltages to ground in real time through the voltage detection module. The control module maintains dynamic monitoring throughout the process and works in conjunction with the voltage detection module to cyclically perform positive and negative voltage acquisition, related value calculation, and alarm trigger determination at a preset frequency.

[0115] If the voltage becomes abnormal due to loose alligator clips or wire displacement during installation, the control module will immediately trigger the audible and visual alarm. The operator must immediately stop the replacement operation, first check and restore the clamping status of the test lead of the corresponding pole, and continue the operation until the voltage returns to normal and the audible and visual alarm is normal.

[0116] After the new traffic light is mechanically fixed, check that the installation position is unobstructed and the wires are not tangled. Confirm that the display screen 6 still shows stable positive and negative voltages and no alarms. The replacement of the traffic light body is then complete.

[0117] Replacing the signal light itself is the core operation of live-line work. At this time, both the positive and negative wires are disconnected from the original signal light, and the circuit is in a temporary monitoring state. Dynamic monitoring throughout the process can achieve continuous safety protection for this critical link. The linkage between the voltage detection module and the control module allows voltage anomalies to be quickly collected, judged, and triggered with audible and visual alarms, realizing the safety management of alarming and stopping work immediately upon alarm. This avoids problems such as voltage drops and short circuits caused by loose alligator clips or wire displacement, which may lead to feeder panel circuit failures or equipment damage. Work can continue only after the fault is rectified and the voltage is restored to normal, which can eliminate real-time safety hazards during the replacement process. After installation, the inspection of the installation position and the secondary confirmation of the voltage stability can verify that the signal light replacement operation has not caused mechanical or electrical damage to the original circuit, ensuring that the voltage status of the replaced circuit meets the normal operation requirements and ensuring the normal operation of subsequent equipment.

[0118] In summary, the applications of this invention are as follows:

[0119] S1. Initialization of algorithm parameters for device startup and control module

[0120] Close the miniature air switch to start the live replacement device: If there is an external AC power supply on site, the charging management module connects to the external AC power supply to simultaneously power the control unit and charge the battery; if there is no external AC power supply on site, the battery serves as a backup power source, supplying power to the control unit through the output of the charging management module to ensure normal device startup.

[0121] The control module automatically initializes the core parameters of the algorithm, first defining the parameters of each physical quantity:

[0122] Rated voltage to ground of the DC feeder panel signal light circuit, rated voltage to ground of the positive terminal. The rated voltage to ground of the negative pole ;

[0123] , : These are the instantaneous values ​​of the positive and negative pole voltages to ground, respectively;

[0124] , These are the short-time average effective values ​​of the positive and negative pole voltages to ground, respectively, which serve as the basis for determining the voltage state.

[0125] , : These are the voltage fluctuation coefficients for the positive and negative poles, respectively. They are dimensionless and characterize the real-time voltage stability.

[0126] Voltage safety threshold, which is the critical value for alarm triggering;

[0127] , : These are the positive and negative alarm trigger judgment values, respectively. They are binary logic values, where 0 = no alarm and 1 = alarm triggered.

[0128] Grounding test line loop continuity status, no unit, binary logic, 1 = loop is on, 0 = loop is off.

[0129] The control module calculates and stores the voltage safety threshold according to the following professional formula:

[0130]

[0131] The negative terminal rated voltage is calculated using the absolute value. Example: When hour, .

[0132] The control module has a preset core judgment standard: the voltage stability judgment standard is as follows. The alarm triggering logic is executed according to the subsequent formula. After initialization is completed, the voltage detection module, display module, and audible and visual alarm module simultaneously enter the working ready state, and the display screen shows "Device ready, operation can be carried out".

[0133] S2. Construct a grounding protection circuit and complete the continuity test.

[0134] Connect the plug-in connector of the grounding test lead to the grounding socket on the device's operation panel, ensuring a tight and secure connection for reliable electrical connection.

[0135] Securely clamp the fully insulated alligator clip at the other end of the grounding test lead onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs. The clamping surfaces must be completely in contact, without any oxide layer obstruction, and without any looseness. Gently pull the test lead to confirm that the mechanical connection is reliable.

[0136] The control module monitors the continuity status of the grounding test line loop in real time. The following decision logic will be executed:

[0137] If the judgment This means the circuit is connected, and the grounding status area of ​​the display shows "grounding normal", completing the grounding protection circuit construction and proceeding to the next step.

[0138] If the judgment If the circuit is disconnected or loose, the control module immediately activates the audible and visual alarm module, and the display shows "Grounding abnormality, please re-clamp." The operator needs to readjust the alligator clip's clamping position until the control module determines the fault. .

[0139] S3. Connect the positive electrode monitoring circuit; the control module quantifies and determines reliability.

[0140] Connect the plug-in connector of the positive test lead to the positive terminal wiring socket on the device's operation panel. After receiving the connection signal, the control module will automatically start the voltage detection module and enter the positive voltage acquisition mode.

[0141] Carefully remove the positive terminal of the faulty signal light using insulated tools. After removal, immediately and securely clamp the fully insulated alligator clip of the positive test lead onto the conductive part of the positive wire of the signal light that has been removed from the terminal block, ensuring that there is no exposed conductive part in the clamp to avoid accidental contact that could cause a short circuit.

[0142] The voltage detection module continuously collects the real-time voltage of the positive terminal to ground at a frequency of 10 sets per second. The system then transmits the collected instantaneous voltage data to the control module in real time.

[0143] The control module calculates the short-time average effective value of the positive-to-ground voltage for 50 sets of instantaneous voltage data over 5 consecutive seconds using the following formula. :

[0144]

[0145] This formula is used to eliminate instantaneous voltage fluctuations caused by electromagnetic interference in the field, ensuring the accuracy of the voltage determination benchmark.

[0146] The control module calculates the positive voltage fluctuation coefficient using the following formula. :

[0147]

[0148] The control module executes the positive alarm trigger determination according to the following binary logic formula:

[0149]

[0150] Execution of the judgment result:

[0151] like The display screen shows in real time. The specific values ​​show that the audible and visual alarms have no abnormal alarms, and the control module determines that the positive monitoring circuit connection is reliable, so the next step can be performed.

[0152] like The control module immediately activates the audible and visual alarm module, triggering an alarm. The display shows "Positive test line is loose, please tighten." The operator must immediately check and tighten the alligator clips until the control module determines the issue. .

[0153] S4. Connect the negative monitoring circuit; the control module uses standard quantitative judgment to determine reliability.

[0154] This step is a serial operation and can only be executed after the control module determines that the positive electrode monitoring circuit is reliably connected. Its quantitative calculation and judgment logic are completely consistent with those of the positive electrode monitoring circuit, ensuring operational standardization and safety.

[0155] Connect the plug-in connector of the negative test lead to the negative wiring socket on the device's operation panel. The control module will then activate the voltage detection module and enter the negative voltage acquisition mode.

[0156] Carefully remove the negative terminal of the faulty signal light using insulated tools. Immediately after removal, securely and completely clamp the fully insulated alligator clips of the negative test lead onto the conductive part of the negative wire of the signal light that has been removed from the terminal block.

[0157] The voltage detection module continuously collects the real-time voltage of the negative terminal to ground at a frequency of 10 sets per second. It also transmits instantaneous voltage data to the control module in real time.

[0158] The control module calculates the short-time average effective value of the negative terminal-to-ground voltage for 50 consecutive sets of instantaneous voltage data over 5 seconds using the following formula. :

[0159]

[0160] The control module calculates the negative electrode voltage fluctuation coefficient using the following formula. :

[0161]

[0162] The control module performs the negative pole alarm trigger determination according to the following binary logic formula:

[0163]

[0164] Execution of the judgment result:

[0165] If is true, the display screen will display the specific value in real time, the acoustic-optic alarm will not give an abnormal alarm, and the control module determines that the negative pole monitoring circuit is reliably connected;

[0166] If is true, the control module will immediately drive the acoustic-optic alarm module to trigger an alarm, the display screen will prompt "The negative pole test wire is loose, please reinforce it", and the operator needs to immediately reinforce the clamping state of the alligator clip until it is determined to be qualified.

[0167] Both the positive and negative pole monitoring circuits are determined to be reliable and after that, the control module drives the device to enter the full-process dynamic monitoring mode, and at a frequency of once per second, it cyclically executes the collection of the positive and negative pole voltages, calculation, calculation and judgment, and the voltage data on the display screen is refreshed in real time.

[0168] S5. Replace the signal lamp, and the control module monitors and alarms for abnormalities throughout the process

[0169] When the control module determines that the positive and negative pole monitoring circuits are reliably connected, the voltage is stable, there is no alarm, and on the premise that the grounding circuit is normal, use insulating tools to disassemble the fixing structure of the faulty signal lamp and remove the faulty signal lamp from the feeder panel.

[0170] Install the new signal lamp to the corresponding installation position on the feeder panel, complete the mechanical fixation, and ensure that the installation is firm and there is no looseness.

[0171] During the whole installation process, the control module maintains full-process dynamic monitoring and executes the following logic:联动 with the voltage detection module, and at a frequency of once per second, it cyclically collects 、 , calculates 、 , and executes the alarm trigger judgment according to the judgment formula.

[0172] Abnormal handling: If during the installation process, due to the loosening of the alligator clip, wire displacement, etc., the control module determines that any one pole or , then an acoustic-optic alarm will be immediately triggered, and the operator needs to immediately stop the replacement operation, first check and restore the clamping state of the test wire of the corresponding pole until the control module determines 、 , and then the operation can continue.

[0173] After the new traffic light is mechanically fixed, check that the installation position is unobstructed and the wires are not tangled. Confirm that the control module display still shows stable positive and negative voltages and no alarms. The replacement of the traffic light body is then complete.

[0174] S6. Restore the wiring, tighten the connections in sequence, and complete the manual alarm reset.

[0175] When restoring wiring, follow the principle of negative first, then positive, and immediately tighten the clamps after disconnecting them. After disconnecting the alligator clips on the test leads, the control module will automatically determine the corresponding pole. This will trigger an alarm. After the operator tightens the wires, they can manually deactivate the alarm using the alarm reset button. The specific steps are as follows:

[0176] Using an insulated tool, pinch the fully insulated alligator clip on the blue negative test lead and quickly disconnect it from the negative lead. After disconnection, immediately tighten the conductive part of the negative lead to the negative terminal of the new signal light, ensuring a secure connection and no exposed conductors.

[0177] After the negative electrode wire is tightened, press the audible and visual alarm reset button on the device panel. Upon receiving the reset signal, the control module will force the alarm status to 0. The audible and visual alarm stops sounding, and the display shows "Negative wiring restored."

[0178] Following the same procedure described above, quickly disconnect the alligator clip from the brown positive test lead and immediately tighten the positive lead to the positive terminal of the new indicator light. Afterward, press the reset button again. The control module will... Forced to 0, the audible and visual alarm returned to normal, and the display showed "Positive wiring restored."

[0179] After both the positive and negative wires are tightened, observe the illumination status of the new indicator light to confirm that it matches the feeder panel circuit status. The control module display should then show the positive and negative terminals. No abnormal alarms were detected within the rated voltage range.

[0180] S7. Finishing work, resetting equipment and storing supplies.

[0181] Disconnect the grounding test leads from the clamps of the DC feeder panel's dedicated grounding copper busbar in sequence, unplug the plug-in connector at the device end, the control module detects that the grounding loop is broken, and the display screen prompts "Grounding loop is broken", then organize and store the grounding test leads.

[0182] Disconnect the device terminals of the positive and negative test leads in the order of negative first, then positive. The control module will then stop the voltage acquisition and calculation of the corresponding poles. After organizing all the special test leads, place them in the accessory storage area of ​​the device box cover.

[0183] Disconnect the miniature air switch on the device housing, turn off the main power supply of the device, unplug the external AC power plug of the device, and the control module will complete the saving of voltage data and alarm records for this operation and reset the module status.

[0184] Inspect the DC feeder panel work area to confirm that no tools or wire ends are left behind and that the new signal lights are working properly. Organize and store the live replacement device and all work equipment to complete this high-reliability live replacement signal light operation.

[0185] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-reliability live-line signal light replacement device, comprising a housing (10) with a cover (20), an operation panel disposed on the housing (10), a control unit and a power supply unit built into the housing (10), and a connecting cable assembly; characterized in that, The operation panel integrates a display screen (6), a positive terminal socket (3), a negative terminal socket (4), a grounding terminal socket (5), an audible and visual alarm, and a miniature air switch (2). The audible and visual alarm is equipped with a reset button (9), which is used to manually deactivate the alarm state of the audible and visual alarm. The miniature air switch (2) serves as the power switch for the device. The control unit includes a control circuit board, which integrates a voltage detection module, a display module, a control module, and an audible and visual alarm module. The voltage detection module is electrically connected to the positive terminal connection socket (3) and the negative terminal connection socket (4) to collect the voltage to ground of the positive and negative terminals of the signal lamp. The display module is electrically connected to the display screen (6). The control module is electrically connected to the voltage detection module, the display module, and the audible and visual alarm module, respectively. The power supply unit includes a storage battery and a charging management module. The storage battery is electrically connected to the charging management module, and the charging management module is also electrically connected to the power interface (1) located on the operation panel. The connecting wire assembly includes one positive test wire, one negative test wire, and one ground test wire. One end of each test wire is a fully insulated alligator clip. Only the inside of the clip is a conductive area, while the rest of the conductive parts are fully wrapped with heat-shrink tubing.

2. The high-reliability live-line signal light replacement device according to claim 1, characterized in that, The miniature air switch (2) is connected in series between the charging management module and the control circuit board.

3. The high-reliability live-line signal light replacement device according to claim 1, characterized in that, The control unit and the power supply unit are separated by an insulating shielding partition.

4. The high-reliability live-line signal light replacement device according to claim 1, characterized in that, The connecting wire assembly can be stored in the accessory storage area (21) provided inside the box cover (20). The plug-in connector of the positive test wire is compatible with the positive wiring socket (3), the plug-in connector of the negative test wire is compatible with the negative wiring socket (4), and the plug-in connector of the grounding test wire is compatible with the grounding wiring socket (5). The positive test wire is a brown test wire, the negative test wire is a blue test wire, and the grounding test wire is a black test wire.

5. A highly reliable method for replacing traffic lights while they are powered on, characterized in that, Includes the following steps: S1. Start the live-line replacement device, so that the voltage detection module, display module and audible and visual alarm module of the live-line replacement device enter the working ready state; S2. Connect the plug-in connector of the grounding test line to the grounding wiring socket (5), and firmly clamp the fully insulated alligator clip of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs; S3. Connect the plug-in connector of the positive test line to the positive wiring socket (3), remove the positive wiring terminal of the fault signal light, and immediately clamp the fully insulated alligator clip of the positive test line firmly to the conductive part of the positive wire of the signal light that is detached from the terminal plate. Observe the positive voltage value to ground through the display screen (6). When the voltage is stable near the rated voltage and the sound and light alarm does not alarm abnormally, confirm that the positive monitoring circuit is reliably connected. S4. After the positive monitoring circuit is reliably connected, connect the plug-in connector of the negative test line to the negative wiring socket (4), remove the negative wiring terminal of the fault signal light, and immediately clamp the fully insulated alligator clip of the negative test line firmly to the conductive part of the negative wire of the signal light that is detached from the terminal plate. Observe the negative voltage value to ground through the display screen (6). When the voltage is stable near the rated voltage and the sound and light alarm does not alarm abnormally, confirm that the negative monitoring circuit is reliably connected. S5. After the positive and negative monitoring circuits are reliably connected, remove the fault indicator light and install a new indicator light. During the replacement process, the device monitors the voltage of the positive and negative poles to ground in real time. If the voltage is abnormal, the audible and visual alarm will be triggered immediately. S6. After the new signal light is installed, first disconnect the connection between the fully insulated alligator clip of the negative test line and the negative wire, and immediately after disconnection, tighten the negative wire to the negative terminal of the new signal light. Manually reset the sound and light alarm by using the reset button (9); then disconnect the connection between the fully insulated alligator clip of the positive test line and the positive wire, and immediately after disconnection, tighten the positive wire to the positive terminal of the new signal light. Manually reset the sound and light alarm by using the reset button (9). S7. Disconnect and store the grounding test line, positive test line, and negative test line in sequence, turn off the miniature air switch (2), organize the work equipment, and complete the signal light replacement.

6. The high-reliability live-line replacement method for signal lights according to claim 5, characterized in that, S1 specifically includes the following steps: S11. Close the miniature air switch (2) to start the live replacement device; if there is an external power supply on site, the charging management module is connected to the external AC power supply to simultaneously power the control unit and charge the battery; if there is no external power supply on site, the battery serves as a backup power supply and powers the control unit through the output of the charging management module to ensure the device starts normally. S12. The control module automatically completes the initialization of the core parameters of the algorithm. First, it clarifies the specific definitions of each physical quantity parameter, including the rated voltage to ground of the DC feeder screen signal light circuit, the instantaneous value of the positive and negative pole real-time voltage to ground, the short-time average effective value of the positive and negative pole voltage to ground, the voltage fluctuation coefficient of the positive and negative pole, the voltage safety threshold, the positive and negative pole alarm trigger judgment value, and the relevant definitions of the on / off state of the grounding test line circuit. S13. The control module calculates and stores the voltage safety threshold according to the preset standard. When calculating, the absolute value of the rated voltage to ground of the negative pole must be taken. S14. The control module presets the core judgment criteria, among which the judgment criteria for voltage stability is that the voltage fluctuation coefficients of both the positive and negative poles do not exceed five percent. The alarm trigger logic is executed according to the relevant requirements in the subsequent steps. After all parameters are initialized, the voltage detection module, display module and sound and light alarm module enter the working ready state simultaneously. The display screen (6) displays the prompt message "The device is ready and can be operated".

7. The high-reliability live-line signal light replacement method according to claim 5, characterized in that, S2 includes the following steps: S21. Connect the plug-in connector of the grounding test line to the grounding wiring socket (5) on the device operation panel to ensure that the connector is in tight contact and without looseness, so as to achieve a reliable electrical connection. S22. Securely clamp the fully insulated alligator clip at the other end of the grounding test line onto the dedicated grounding copper busbar of the DC feeder panel to which the signal light to be replaced belongs. The clamping surfaces must be completely in contact, without any oxide layer obstruction, and without any looseness. Gently pull the test line to confirm that the mechanical connection is reliable. S23. The control module detects the continuity status of the grounding test line circuit in real time and executes the corresponding judgment logic. If the circuit is connected, the corresponding area of ​​the display screen (6) will display a normal prompt, and the grounding protection circuit will be constructed and the next operation will be carried out. If the circuit is disconnected or loose, the control module will immediately drive the sound and light alarm module to trigger the alarm, and the display screen (6) will display an abnormal prompt. The operator needs to readjust the alligator clip clamping status until the control module determines that the circuit is connected.

8. The high-reliability live-line replacement method for signal lights according to claim 5, characterized in that, S3 includes the following steps: S31. Connect the plug-in connector of the positive test line to the positive wiring socket (3) on the device operation panel. After the control module receives the connection signal, it will automatically start the voltage detection module and enter the positive voltage acquisition mode. S32. Carefully remove the positive terminal of the faulty signal light using insulated tools. After removal, immediately securely and completely clamp the fully insulated alligator clip of the positive test lead onto the conductive part of the positive wire of the signal light that has been removed from the terminal block, ensuring that there is no exposed conductive part in the clip to avoid accidental contact that could cause a short circuit. S33. The voltage detection module continuously collects the real-time voltage of the positive terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time. S34. The control module calculates the short-time average effective value of the positive terminal to ground voltage according to the preset logic to eliminate the instantaneous voltage fluctuations caused by electromagnetic interference on site and ensure the accuracy of the voltage judgment benchmark. S35. The control module calculates the positive voltage fluctuation coefficient according to the preset logic, which represents the stability of the real-time positive voltage. S36. The control module performs positive alarm trigger determination according to preset binary logic, and clarifies the determination conditions for alarm triggering and non-triggering. S37. Perform the corresponding operation according to the judgment result. If there is no abnormality, observe the positive voltage value to ground through the display screen (6). When the voltage stabilizes near the rated voltage and the sound and light alarm does not alarm abnormally, the control module determines that the positive monitoring circuit is reliably connected and proceeds to the next step. If there is an abnormality, the control module immediately drives the sound and light alarm module to trigger the alarm. The operator must immediately check and reinforce the alligator clip clamping status until the control module determines that there is no abnormality.

9. The high-reliability live-line replacement method for signal lights according to claim 5, characterized in that, S4 includes the following steps: S41. This step is a serial operation and can only be executed after the control module determines that the positive electrode monitoring circuit is reliably connected. Its quantitative calculation and judgment logic are completely consistent with the positive electrode monitoring circuit to ensure the standardization and safety of operation. S42. Connect the plug-in connector of the negative test line to the negative wiring socket (4) on the device operation panel. The control module starts the voltage detection module and enters the negative voltage acquisition mode. S43. Carefully remove the negative terminal of the faulty signal light using insulated tools. Immediately after removal, securely and completely clamp the fully insulated alligator clip of the negative test lead to the conductive part of the negative wire of the signal light that has been removed from the terminal block. S44. The voltage detection module continuously collects the real-time voltage of the negative terminal to ground at a preset frequency and transmits the collected voltage data to the control module in real time. S45. The control module calculates the short-time average effective value of the negative electrode voltage to ground and the negative electrode voltage fluctuation coefficient according to the same preset logic as the positive electrode monitoring circuit. S46. The control module executes the negative alarm trigger determination according to the same preset binary logic as the positive monitoring circuit; S47. Perform the corresponding operation according to the judgment result. If there is no abnormality, observe the negative pole to ground voltage value through the display screen (6). When the voltage stabilizes near the rated voltage and the sound and light alarm does not alarm abnormally, the control module determines that the negative pole monitoring circuit is reliably connected. If there is an abnormality, the control module immediately drives the sound and light alarm module to trigger the alarm. The operator needs to immediately reinforce the alligator clip clamping state until the control module determines that there is no abnormality. After S48 and the positive and negative monitoring circuits are both determined to be reliable, the control module drives the device to enter the full-process dynamic monitoring mode, and performs positive and negative voltage acquisition, related numerical calculation and alarm judgment in a cycle at a preset frequency, and refreshes the voltage data on the display screen (6) in real time.

10. The high-reliability live-line replacement method for signal lights according to claim 5, characterized in that, The real-time monitoring of the positive and negative voltages to ground in S5 specifically involves: Throughout the installation process, the device monitors the positive and negative voltages to ground in real time through the voltage detection module. The control module maintains dynamic monitoring throughout the process and works in conjunction with the voltage detection module to cyclically perform positive and negative voltage acquisition, related value calculation, and alarm trigger determination at a preset frequency. If the voltage becomes abnormal due to loose alligator clips or wire displacement during installation, the control module will immediately trigger the audible and visual alarm. The operator must immediately stop the replacement operation, first check and restore the clamping status of the test lead of the corresponding pole, and continue the operation until the voltage returns to normal and the audible and visual alarm is normal. After the new signal light is mechanically fixed, check that the installation position is unobstructed and the wires are not tangled. Confirm that the display screen (6) still shows that the positive and negative voltages are stable and there is no alarm. The replacement of the signal light body is then completed.

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