Device for live short circuit of low-voltage master switch

Abstract

The invention provides a device for live short circuit of a low-voltage master switch. Comprising an inlet wire quick-connection socket, an outlet wire quick-connection socket, a three-phase bus, an intelligent circuit breaker, an inlet wire flexible cable, an inlet wire quick-connection plug, an inlet wire confluence clamp, an outlet wire flexible cable, an outlet wire quick-connection plug, an outlet wire confluence clamp, an intelligent phase detector, a temperature sensor, an alarm and a mobile cabinet body. The device can realize electrified short circuit of the low-voltage main switch under the condition of uninterruptible power supply, current monitoring and control are carried out through the intelligent circuit breaker, phase verification is carried out through the intelligent phase checking device, the temperature sensor monitors the temperature of a bus, and the alarm gives an abnormal alarm. All the components are fixedly mounted on the movable cabinet body, so that field operation and movement are facilitated. According to the invention, the power recovery speed when the power grid fails is effectively improved, the power failure time is reduced, and the operation safety and the stability of the power grid are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of electric power maintenance, and in particular to a device for short-circuiting a live low-voltage main switch. Background Art

[0002] The power quality in various regions has reached the international advanced level, and the low voltage problem has been basically eliminated. However, the undervoltage release device of the low-voltage main switch still exists, which makes it impossible to quickly restore power when the power grid fails. The removal of this device requires power outage operation, which has a large impact and is difficult to power outage. In addition, after the low-voltage main switch fails, it cannot be replaced in time due to the variety of models, and the repair cycle is long. Although the use of low-voltage generators can provide temporary power supply, users will still feel multiple power outages, affecting the user experience. Summary of the invention

[0003] The purpose of the present invention is to provide a device for short-circuiting a low-voltage main switch under power to solve the above-mentioned problem.

[0004] To achieve the above object, the present invention provides a device for short-circuiting a low-voltage main switch under power, comprising an incoming line quick-connect socket, an outgoing line quick-connect socket, a three-phase busbar, an intelligent circuit breaker, an incoming line flexible cable, an incoming line quick-connect plug, an incoming line bus clamp, an outgoing line flexible cable, an outgoing line quick-connect plug, and an outgoing line bus clamp;

[0005] One end of the three-phase busbar is connected to the incoming line quick-connect socket, and the other end is connected to the outgoing line quick-connect socket, and an intelligent circuit breaker is arranged on the three-phase busbar;

[0006] One end of the incoming line flexible cable is connected to the incoming line bus clamp, and the other end is connected to the incoming line quick-connect plug;

[0007] One end of the outlet flexible cable is connected to the outlet bus clamp, and the other end is connected to the outlet quick-connect plug;

[0008] The incoming line bus clamp is used to connect the incoming line end of the low-voltage main switch, and the outgoing line bus clamp is used to connect the outgoing line end of the low-voltage main switch;

[0009] The incoming line quick-connect plug is used to be inserted into the incoming line quick-connect socket, and the outgoing line quick-connect plug is used to be inserted into the outgoing line quick-connect socket;

[0010] When the intelligent circuit breaker is opened, the device is connected to or disconnected from the low-voltage main switch;

[0011] When the intelligent circuit breaker is closed, the low-voltage main switch is short-circuited under power, and the current is monitored in real time during the short-circuiting process. If an abnormality occurs, the circuit breaker is automatically opened.

[0012] Preferably, it also includes an intelligent phase checker, the detection end of the intelligent phase checker is connected to the incoming line quick-connect socket and the outgoing line quick-connect socket, and the intelligent phase checker is used to perform phase verification and phase sequence verification when the incoming line quick-connect plug is inserted into the incoming line quick-connect socket and the outgoing line quick-connect plug is inserted into the outgoing line quick-connect socket, and control the indicator light to indicate according to the verification result.

[0013] Preferably, the rated current of the incoming flexible cable and the outgoing flexible cable is greater than the rated current of the low-voltage main switch.

[0014] Preferably, it also includes an opening switch button, a closing switch button, an opening indicator light and a closing indicator light;

[0015] When the opening switch button is pressed, the intelligent circuit breaker is controlled to open, and the opening indicator light indicates that the circuit breaker is in an open state;

[0016] When the closing switch button is pressed, the intelligent circuit breaker is controlled to close, and the closing indicator light prompts that the circuit breaker is in the closed state.

[0017] Preferably, it also includes a temperature sensor and an alarm, wherein the temperature sensor is used to monitor the operating temperature of the three-phase busbar, and when the operating temperature of the three-phase busbar exceeds a set threshold, the alarm sounds an alarm.

[0018] Preferably, it also includes a mobile cabinet, and the incoming quick-connect socket, outgoing quick-connect socket, three-phase busbar, intelligent circuit breaker and intelligent nuclear phase device are fixedly installed on the mobile cabinet; the mobile cabinet is provided with a storage space for storing the incoming flexible cable, incoming quick-connect plug, incoming bus clamp, outgoing flexible cable, outgoing quick-connect plug and outgoing bus clamp.

[0019] The present invention has the following beneficial effects:

[0020] The present invention can short-circuit the low-voltage main switch without cutting off the power supply, thus avoiding the power-off operation required for removing the under-voltage release device, and greatly reducing the impact of the power outage on users; when a power grid fails, the low-voltage main switch can be quickly short-circuited using the device of the present invention, so that power can be quickly restored, thereby improving the reliability of the power grid; since the device of the present invention can be operated under power, emergency repair personnel do not need to worry about the problem of various models, and can quickly replace the faulty low-voltage main switch, thereby shortening the emergency repair cycle; the device of the present invention can monitor the current in real time during the short-circuiting process under power, and once an abnormality occurs, the intelligent circuit breaker automatically opens, thereby ensuring the power safety of users, reducing the number of power outages perceived by users, and improving the user experience; the real-time monitoring and automatic opening functions of the intelligent circuit breaker ensure the safety of the short-circuiting operation under power, and reduce the safety risks of operators; the device of the present invention has a simple structure, is easy to operate, is applicable to various types of low-voltage main switches, and has strong versatility and flexibility; by reducing the number of power outages and shortening the emergency repair cycle, the present invention helps to reduce the operation and maintenance costs of the power grid and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The schematic diagram of a device for short-circuiting a low-voltage main switch under power in an embodiment of the present invention is shown in FIG. DETAILED DESCRIPTION

[0023] The detailed description of the accompanying drawings is intended as an illustration of the current embodiments of the present invention and is not intended to represent the only form in which the present invention can be implemented. It should be understood that the same or equivalent functions can be accomplished by different embodiments that are intended to be included in the spirit and scope of the present invention.

[0024] See also Figure 1 , an embodiment of the present invention provides a device for live short-circuiting a low-voltage main switch, comprising an incoming line quick-connect socket, an outgoing line quick-connect socket, a three-phase busbar, an intelligent circuit breaker, an incoming line flexible cable, an incoming line quick-connect plug, an incoming line bus clamp, an outgoing line flexible cable, an outgoing line quick-connect plug, and an outgoing line bus clamp;

[0025] One end of the three-phase busbar is connected to the incoming line quick-connect socket, and the other end is connected to the outgoing line quick-connect socket, and an intelligent circuit breaker is arranged on the three-phase busbar;

[0026] One end of the incoming line flexible cable is connected to the incoming line bus clamp, and the other end is connected to the incoming line quick-connect plug;

[0027] One end of the outlet flexible cable is connected to the outlet bus clamp, and the other end is connected to the outlet quick-connect plug;

[0028] The incoming line bus clamp is used to connect the incoming line end of the low-voltage main switch, and the outgoing line bus clamp is used to connect the outgoing line end of the low-voltage main switch;

[0029] The incoming line quick-connect plug is used to be inserted into the incoming line quick-connect socket, and the outgoing line quick-connect plug is used to be inserted into the outgoing line quick-connect socket;

[0030] When the intelligent circuit breaker is opened, the device is connected to or disconnected from the low-voltage main switch;

[0031] When the intelligent circuit breaker is closed, the low-voltage main switch is short-circuited under power, and the current is monitored in real time during the short-circuiting process. If an abnormality occurs, the circuit breaker is automatically opened.

[0032] The working principle of the present invention can be divided into the following steps:

[0033] Device preparation: The incoming line quick-connect socket and the outgoing line quick-connect socket are connected to the two ends of the three-phase busbar respectively, forming a circuit path that can be quickly connected and disconnected; an intelligent circuit breaker is installed on the three-phase busbar, which has the functions of closing and opening, and can monitor the current in the circuit in real time; the incoming line flexible cable and the outgoing line flexible cable are connected to the incoming line busbar clamp and the outgoing line busbar clamp respectively, and the other ends are connected to the incoming line quick-connect plug and the outgoing line quick-connect plug respectively;

[0034] Connection device: When it is necessary to short-circuit the low-voltage main switch, first ensure that the intelligent circuit breaker is in the off state. At this time, the circuit is disconnected and safe operation can be performed; use the incoming line bus clamp and the outgoing line bus clamp to clamp the incoming line end and the outgoing line end of the low-voltage main switch respectively. The two clamps are connected to the quick-connect plug through a flexible cable;

[0035] Live short-circuit operation: insert the incoming line quick-connect plug into the incoming line quick-connect socket, and insert the outgoing line quick-connect plug into the outgoing line quick-connect socket, so that the incoming and outgoing lines of the low-voltage main switch are connected through the three-phase busbar and the intelligent circuit breaker; after confirming that the connection is correct, operate the intelligent circuit breaker to close the switch, and the three-phase busbar will short-circuit the incoming and outgoing lines of the low-voltage main switch, thus realizing live short-circuit;

[0036] Real-time monitoring and protection: After the intelligent circuit breaker is closed, the current in the circuit will be monitored in real time; if the current is within the normal range, the device will continue to supply power; if an abnormal current (such as overload, short circuit, etc.) is detected, the intelligent circuit breaker will automatically open and quickly cut off the circuit to protect the low-voltage main switch and the power grid from damage;

[0037] Disassembly and connection: When there is no need to short-circuit the low-voltage main switch or maintenance is required, first operate the intelligent circuit breaker to open the switch to ensure that the circuit is disconnected; then remove the outgoing line quick-connect plug and the incoming line quick-connect plug in turn, and finally remove the incoming line bus clamp and the outgoing line bus clamp to complete the disassembly of the device;

[0038] Through the above steps, the present invention can safely and quickly short-circuit the low-voltage main switch without power outage, and quickly restore power when necessary, while ensuring the safety of operators and power grids.

[0039] Furthermore, it also includes an intelligent phase checker, whose detection end is connected to the incoming line quick-connect socket and the outgoing line quick-connect socket. The intelligent phase checker is used to perform phase verification and phase sequence verification when the incoming line quick-connect plug is inserted into the incoming line quick-connect socket and the outgoing line quick-connect plug is inserted into the outgoing line quick-connect socket, and control the indicator light to indicate according to the verification result.

[0040] Specifically, the role of the intelligent phase checker in the present invention is to ensure that the phase and phase sequence in the live short-circuit operation are correct to avoid electrical accidents caused by phase errors.

[0041] Here is how the Smart Phaser works:

[0042] Connect the detection end: The detection end of the intelligent phase detector is connected to the incoming line quick-connect socket and the outgoing line quick-connect socket respectively. In this way, when the incoming line quick-connect plug and the outgoing line quick-connect plug are inserted into the corresponding sockets, the intelligent phase detector can detect the electrical signals from the incoming and outgoing lines of the low-voltage main switch;

[0043] Phase check: When the incoming and outgoing quick-connect plugs are correctly inserted, the intelligent phase detector starts to work and first performs phase check. The purpose of phase check is to confirm whether the corresponding phases (A phase, B phase, C phase) of the incoming and outgoing lines correspond correctly, that is, whether the A phase of the incoming line corresponds to the A phase of the outgoing line, and so on.

[0044] Phase sequence check: After completing the phase check, the intelligent phase checker will then perform phase sequence check; phase sequence check is to confirm whether the phase sequence of the incoming and outgoing lines is consistent, that is, whether the phase sequence of the incoming line (such as ABC) is the same as the phase sequence of the outgoing line; wrong phase sequence may cause faults such as motor reversal;

[0045] Control indicator light: The intelligent phase checker controls the indicator light according to the verification results; if the phase and phase sequence are correct, the indicator light will show green or other colors indicating "pass", indicating that the next step of live short-circuit operation can be carried out safely; if the phase or phase sequence is wrong, the indicator light will show red or other colors indicating "warning", prompting the operator that there is a problem and needs to recheck and adjust the connection until the indicator light shows "pass";

[0046] Operation confirmation: The operator makes judgments based on the indications of the indicator lights. Only when the indicator lights show "pass" can the intelligent circuit breaker be closed to achieve live short circuit. If the indicator lights show "warning", the operator must first solve the phase or phase sequence problem, and then re-check until it is confirmed to be correct.

[0047] Through this series of checks by the intelligent phase detector, the present invention ensures safe and reliable electrical connection when short-circuiting the low-voltage main switch under power, avoids potential dangers caused by phase or phase sequence errors, and improves operational safety and grid stability.

[0048] Furthermore, the rated current of the incoming flexible cable and the outgoing flexible cable is greater than the rated current of the low-voltage main switch.

[0049] Specifically, flexible cables with a rated current greater than that of the low-voltage main switch can provide a greater safety margin. This means that even under maximum load conditions, the cable can safely carry current without overloading. Since the rated current of the cable is higher than the rated current of the switch, the cable generates less heat when carrying the maximum current of the switch, thereby reducing the heat loss of the cable and extending the service life of the cable. This design enables the device to adapt to low-voltage main switches with different rated currents, increasing the versatility of the device. The device can maintain good working performance even when switching between low-voltage main switches of different specifications. The use of cables with high rated currents can reduce the risk of failures caused by cable overload and improve the reliability and stability of the entire system. Since the rated current of the cable is higher than that of the switch, it is not necessary to replace the cable immediately during maintenance. Only the status and performance of the low-voltage main switch need to be paid attention to, which simplifies the maintenance process. If the load demand of the power grid increases in the future, the existing low-voltage main switch may need to be upgraded to a model with a higher rated current. At this time, the existing flexible cables can still be used without replacement, saving costs.

[0050] Furthermore, it also includes an opening switch button, a closing switch button, an opening indicator light and a closing indicator light;

[0051] When the opening switch button is pressed, the intelligent circuit breaker is controlled to open, and the opening indicator light indicates that the circuit breaker is in an open state;

[0052] When the closing switch button is pressed, the intelligent circuit breaker is controlled to close, and the closing indicator light prompts that the circuit breaker is in the closed state.

[0053] Specifically, the opening switch button, closing switch button, opening indicator light and closing indicator light provide operators with an intuitive and convenient way to control the status of the smart circuit breaker and obtain real-time status feedback.

[0054] When the operator needs to disconnect the circuit, he can press the disconnect switch button. After pressing the disconnect switch button, the control signal will be sent to the intelligent circuit breaker, causing it to perform the disconnection operation, thereby disconnecting the circuit. Linked with the disconnect switch button, when the intelligent circuit breaker is in the disconnected state, the disconnection indicator light will light up. The function of the disconnection indicator light is to intuitively tell the operator that the circuit breaker has been disconnected and the circuit is in the disconnected state, so that other operations can be safely performed, such as connecting or removing the device.

[0055] When the operator needs to connect the circuit, he can press the closing switch button. After pressing the closing switch button, the control signal will be sent to the intelligent circuit breaker, causing it to perform the closing operation, thereby connecting the circuit. Linked with the closing switch button, when the intelligent circuit breaker is in the closed state, the closing indicator light will light up. The function of the closing indicator light is to intuitively tell the operator that the circuit breaker has been closed and the circuit is in the connected state. At this time, it should be ensured that all safety measures are in place to avoid misoperation. Furthermore, it also includes a temperature sensor and an alarm. The temperature sensor is used to monitor the operating temperature of the three-phase busbar. When the operating temperature of the three-phase busbar exceeds the set threshold, the alarm will sound an alarm.

[0056] Specifically, the temperature sensor is installed near the three-phase bus to monitor the operating temperature of the bus in real time; the temperature sensor can be contact or non-contact, such as thermocouples, thermistors or infrared sensors, all of which can accurately measure temperature and convert it into electrical signals; during the operation of the device, the temperature sensor continuously detects the temperature of the three-phase bus; when the bus temperature rises due to long-term operation or overload, the sensor will capture this change; the system will preset a temperature threshold, which is set based on comprehensive consideration of factors such as the material, rated current, and environmental conditions of the three-phase bus; the setting of the threshold is intended to ensure that the bus operates within a safe temperature range to prevent damage or fire caused by overheating; when the bus temperature detected by the temperature sensor exceeds the set threshold, it will send a signal to the alarm; after receiving the signal, the alarm will immediately emit an audible and visual alarm to alert the operator; after receiving the alarm, the operator should immediately take measures, such as opening the circuit breaker to disconnect the circuit, checking the bus condition, eliminating the cause of the fault, or starting the backup power supply, to ensure the safe operation of the system.

[0057] Furthermore, it also includes a mobile cabinet, and the incoming line quick-connect socket, outgoing line quick-connect socket, three-phase busbar, intelligent circuit breaker and intelligent nuclear phase device are fixedly installed on the mobile cabinet; the mobile cabinet is provided with a storage space for storing the incoming line flexible cable, incoming line quick-connect plug, incoming line junction clamp, outgoing line flexible cable, outgoing line quick-connect plug and outgoing line junction clamp.

[0058] Specifically, the mobile cabinet fixes key components such as the incoming quick-connect socket, the outgoing quick-connect socket, the three-phase busbar, the intelligent circuit breaker and the intelligent nuclear phase device in a unified cabinet. This integrated design makes the entire device compact and easy to move and deploy. The mobile cabinet is equipped with wheels or other mobile devices, so that operators can easily move the entire system between different work locations. There is a special storage space on the mobile cabinet for storing accessories such as incoming flexible cables, incoming quick-connect plugs, incoming bus clamps, outgoing flexible cables, outgoing quick-connect plugs and outgoing bus clamps. This design helps to keep the work site clean and tidy, and it is convenient for operators to quickly find and use the required tools and accessories. Since all the necessary components and tools are concentrated in a mobile cabinet, operators can quickly start work when performing live short-circuiting operations on site without having to find or carry additional tools. The reasonable layout of the storage space also makes it more convenient to store and retrieve items, improving work efficiency. The mobile cabinet can also provide protection for internal electronic equipment and circuit components to prevent external factors such as dust and moisture from damaging the equipment.

[0059] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A device for short-circuiting a low-voltage main switch under power, characterized in that: Including incoming line quick-connect socket, outgoing line quick-connect socket, three-phase busbar, intelligent circuit breaker, incoming line flexible cable, incoming line quick-connect plug, incoming line bus clamp, outgoing line flexible cable, outgoing line quick-connect plug and outgoing line bus clamp; One end of the three-phase busbar is connected to the incoming line quick-connect socket, and the other end is connected to the outgoing line quick-connect socket, and an intelligent circuit breaker is arranged on the three-phase busbar; One end of the incoming line flexible cable is connected to the incoming line bus clamp, and the other end is connected to the incoming line quick-connect plug; One end of the outlet flexible cable is connected to the outlet bus clamp, and the other end is connected to the outlet quick-connect plug; The incoming line bus clamp is used to connect the incoming line end of the low-voltage main switch, and the outgoing line bus clamp is used to connect the outgoing line end of the low-voltage main switch; The incoming line quick-connect plug is used to be inserted into the incoming line quick-connect socket, and the outgoing line quick-connect plug is used to be inserted into the outgoing line quick-connect socket; When the intelligent circuit breaker is opened, the device is connected to or disconnected from the low-voltage main switch; When the intelligent circuit breaker is closed, the low-voltage main switch is short-circuited under power, and the current is monitored in real time during the short-circuiting process. If an abnormality occurs, the circuit breaker is automatically opened.

2. The device according to claim 1, characterized in that It also includes an intelligent phase checker, whose detection end is connected to the incoming line quick-connect socket and the outgoing line quick-connect socket. The intelligent phase checker is used to perform phase verification and phase sequence verification when the incoming line quick-connect plug is inserted into the incoming line quick-connect socket and the outgoing line quick-connect plug is inserted into the outgoing line quick-connect socket, and control the indicator light to indicate according to the verification result.

3. The device according to claim 2, characterized in that The rated current of the incoming flexible cable and the outgoing flexible cable is greater than the rated current of the low-voltage main switch.

4. The device according to claim 3, characterized in that It also includes an opening switch button, a closing switch button, an opening indicator light and a closing indicator light; When the opening switch button is pressed, the intelligent circuit breaker is controlled to open, and the opening indicator light indicates that the circuit breaker is in an open state; When the closing switch button is pressed, the intelligent circuit breaker is controlled to close, and the closing indicator light prompts that the circuit breaker is in the closed state.

5. The device according to claim 4, characterized in that It also includes a temperature sensor and an alarm. The temperature sensor is used to monitor the operating temperature of the three-phase bus. When the operating temperature of the three-phase bus exceeds a set threshold, the alarm sounds an alarm.

6. The device according to claim 5, characterized in that It also includes a mobile cabinet, on which the incoming quick-connect socket, outgoing quick-connect socket, three-phase busbar, intelligent circuit breaker and intelligent nuclear phase device are fixedly installed; the mobile cabinet is provided with a storage space for storing the incoming flexible cable, incoming quick-connect plug, incoming bus clamp, outgoing flexible cable, outgoing quick-connect plug and outgoing bus clamp.

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