Single-phase bypass load switch and control system thereof

Abstract

The invention relates to the technical field of hot-line work, in particular to a single-phase bypass load switch and a control system thereof. Comprising a data acquisition module used for acquiring current data, environment parameters, a single-phase bypass load switch state and phase sequence parameters in real time; the data judgment module is used for acquiring current data abnormity, environment parameter abnormity and phase sequence parameter abnormity based on the current data, the environment parameters, the state of the single-phase bypass load switch and the phase sequence parameters which are acquired in real time; the display control module is used for receiving and displaying the current data, the environment parameters, the bypass switch state and the phase sequence parameters which are acquired in real time, receiving current data abnormity, environment parameter abnormity and phase sequence abnormity and generating a control instruction in combination with the bypass switch state; and the switch control module receives the control instruction and controls the single-phase bypass load switch to perform opening or closing operation. The intelligence and automation degree of the system reduce the manual intervention demand, reduce the labor cost, and provide powerful support for the efficient and stable operation of a power system.

Description

Technical Field

[0001] The invention relates to the technical field of live working, and in particular to a single-phase bypass load switch and a control system thereof. Background Art

[0002] In the actual work of non-stop power supply operation in the distribution network, emergency defects such as single-phase line break or contact heating are often encountered. In order to avoid the risk of load disconnection and connection, it is often necessary to disable the rear-end load of the fault point before live processing. When dealing with this problem, a three-phase bypass load switch will be used for live operation.

[0003] The existing three-phase bypass load switch is heavy, and the bypass cable is inconvenient to transport. Due to its weight, it is inconvenient to operate the switch on the pole on site. Multiple people are required to use lifting equipment to complete the three-phase bypass load switch operation. At the same time, the existing bypass switch has three outgoing lines that need to be used with 6 cables. The workload and time cost of laying cables are very high. In the actual processing process, most of the faults are single-phase faults, which do not require three outgoing lines. In addition, the existing three-phase bypass load switches are mostly manually operated.

[0004] The problem caused by this is that it will cause repeated local power outages and expand the scope of outage. Bypass operation can handle the emergency defect without stopping the load, but the emergency defect has a high time limit for handling, and bypass operation requires more manpower and time due to on-site arrangement, so the application of bypass operation is limited. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a single-phase bypass load switch and a control system thereof to solve the above-mentioned technical problems.

[0006] In a first aspect, the present invention provides a single-phase bypass load switch control system, comprising: Data acquisition module, real-time acquisition of current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; The data judgment module obtains abnormal current data, abnormal environmental parameters and abnormal phase sequence parameters based on the real-time collected current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; Display control module, receiving and displaying real-time collected current data, environmental parameters, bypass switch status and phase sequence parameters, receiving abnormal current data, abnormal environmental parameters and abnormal phase sequence and generating control instructions in combination with bypass switch status; The switch control module receives control instructions and controls the single-phase bypass load switch to perform opening or closing operations.

[0007] In an optional implementation, the data determination module specifically includes: Abnormal current data includes safety data that exceeds the set safety upper limit or has unstable fluctuations; When the current data is abnormal, an opening control instruction is generated, and when the current data is normal, a closing control instruction is generated; The abnormal environmental parameters include temperature data exceeding a temperature threshold and / or humidity data exceeding a humidity threshold; When the environmental parameters are abnormal, an opening control command is generated, and when the environmental parameters are normal, a closing control command is generated; Abnormal phase sequence parameters include phase sequence parameters of the backup power supply and the main power supply being out of phase; When the phase sequence parameters are abnormal, an opening control command is generated, and when the phase sequence parameters are normal, a closing control command is generated.

[0008] In an optional implementation, the display control module further displays warning information, where the warning information is obtained based on the current data abnormality and / or the environmental parameter abnormality and / or the phase sequence parameter abnormality.

[0009] In an optional embodiment, the single-phase bypass load switch state includes the switch opening or closing state, the local or remote operation trigger state, When the opening or closing state of the switch is consistent with the opening instruction or closing instruction, the single-phase bypass load switch will no longer perform opening or closing operations; When the single-phase bypass load switch is in the local operation trigger state, the user manually or electrically controls the opening or closing command of the single-phase bypass load switch locally; When the single-phase bypass load switch is in the remote operation trigger state, the user remotely controls the opening or closing command of the single-phase bypass load switch based on the remote controller.

[0010] In a second aspect, a single-phase bypass load switch is provided, which executes the above-mentioned single-phase bypass load switch control system when implemented, and the single-phase bypass load switch includes: a single-phase bypass load switch body, a switching switch, a local operating mechanism, and a remote operating mechanism. The switching switch, the local operating mechanism and the remote operating mechanism are all arranged on the single-phase bypass load switch body, and the switching switch connects the single-phase bypass load switch body with the local operating mechanism or the remote operating mechanism.

[0011] In an optional embodiment, the single-phase bypass load switch body includes: a gas box, an operating handle, a spring mechanism, a data acquisition device and a quick plug connector. The spring mechanism and the quick-plug head are both arranged in the gas box. The quick-plug head connects the external cable and the single-phase bypass load switch. The gas box is filled with SF6 gas. The data acquisition device is used to collect data related to the gas box. The operating handle is connected to the spring mechanism inside the gas box through a reserved interface on the gas box.

[0012] In an optional embodiment, the local operating mechanism includes a four-bar linkage, and the four-bar linkage includes an upper crank arm and a lower crank arm. The upper crank arm and the lower crank arm, as well as the lower crank arm and the handle are fixedly connected by pins.

[0013] In an optional embodiment, the four-bar linkage further includes a motor, and one end of the upper crank arm is fixedly connected to the motor for transmitting the force of the motor to the four-bar linkage.

[0014] In an optional embodiment, it also includes a battery and a motor mechanism, which are arranged in the single-phase bypass load switch body and connected to the motor.

[0015] In an optional embodiment, the remote operating mechanism includes a 4G unit, a remote control unit and a control circuit arranged on the single-phase bypass load switch body, the 4G unit sends data to the client, the remote control unit receives control instructions, and controls the single-phase bypass load switch to open or close through the control circuit.

[0016] The beneficial effect of the present invention is that the single-phase bypass load switch control system obtains comprehensive operating data in real time through the data acquisition module, the data judgment module accurately analyzes various abnormal situations, and the display control module not only intuitively presents the equipment status and parameters, but also generates intelligent control instructions based on the abnormal situation and the switch status, and finally the switch control module executes the opening and closing operations. This series of collaborative work greatly improves the safety, reliability and operating efficiency of the system, effectively guarantees the stability of power supply, and reduces the risk of equipment failure. At the same time, its intelligence and automation reduce the need for manual intervention, improve the convenience of operation, and reduce labor costs, providing strong support for the efficient and stable operation of the power system.

[0017] In addition, the invention has a reliable design principle, a simple structure and a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 The figure is a schematic block diagram of a single-phase bypass load switch control system according to an embodiment of the present invention.

[0020] Figure 2 It is a structural diagram of a single-phase bypass load switch provided in an embodiment of the present invention.

[0021] Among them, 1. 4G unit; 2. Upper crank arm; 3. Remote / local; 4. Closing indication; 5. Switch; 6. Opening indication; 7. Counter; 8. Operating handle; 9. Single-phase bypass load switch body; 10. Lower crank arm; 11. Remote and local operating mechanism body; 12. Built-in current sensor; 13. Shielded soft wire; 14. External current sensor. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] like Figure 1 As shown, a single-phase bypass load switch control system includes: Data acquisition module, real-time acquisition of current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; The data acquisition module collects current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters in real time, and its beneficial effects are remarkable. By collecting current data in real time, it is possible to accurately monitor the load size and current change trend in the power system, provide key basis for the stable operation of the system, and help to timely discover potential electrical faults such as overload and short circuit, so as to take measures in advance to avoid equipment damage and power outages. The collection of environmental parameters (such as temperature, humidity, etc.) can understand the operating environment of the equipment in real time, because environmental factors have a great impact on the performance and life of electrical equipment. For example, high temperature may cause equipment heat dissipation difficulties, accelerate component aging, and abnormal humidity may cause insulation problems. By collecting these data, environmental conditions can be adjusted in time or corresponding protective measures can be taken to ensure the normal operation of the equipment. The collection of the status of the single-phase bypass load switch allows the operator to clearly grasp the current opening and closing status of the switch, ensure the accuracy and safety of the operation, and avoid system failures caused by misoperation. The collection of phase sequence parameters is crucial to the normal operation of the power system. The correct phase sequence is the basis for the normal operation of three-phase equipment. The collection of phase sequence parameters can effectively prevent problems such as equipment reversal and damage caused by incorrect phase sequence, and ensure the three-phase balance and stable operation of the power system.

[0025] The data judgment module obtains abnormal current data, abnormal environmental parameters and abnormal phase sequence parameters based on the real-time collected current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; The data judgment module obtains abnormal current data, abnormal environmental parameters and abnormal phase sequence parameters based on multiple parameters collected in real time, which is of great significance. In terms of current data, it can quickly analyze whether the current exceeds the normal range or has unstable fluctuations. Once an abnormality is found, it can immediately prompt the system to have risks such as overload and short circuit, so that the staff can promptly check the source of the fault, take measures such as current limiting and circuit cutting to prevent the fault from expanding, protect the safety of equipment and lines, and reduce the losses caused by electrical accidents. For the judgment of abnormal environmental parameters, when the ambient temperature is too high and close to the heat resistance limit of the equipment or the humidity is too high to affect the insulation performance, the module can issue an alarm in time, prompting the operation and maintenance personnel to take measures such as cooling and dehumidification to ensure that the equipment operates in a suitable environment, extend the service life of the equipment, and reduce the equipment failure rate caused by environmental factors. The judgment of abnormal phase sequence parameters can effectively avoid the wrong connection of different phase sequence power supplies to the power system, prevent three-phase equipment from being damaged due to phase sequence errors, ensure the normal operation of three-phase equipment in the power system, maintain the stability of power supply, and avoid large-scale power outages caused by phase sequence problems.

[0026] Display control module, receiving and displaying real-time collected current data, environmental parameters, bypass switch status and phase sequence parameters, receiving abnormal current data, abnormal environmental parameters and abnormal phase sequence and generating control instructions in combination with bypass switch status; The display control module receives and displays various real-time acquisition parameters and generates control instructions in combination with abnormal conditions and bypass switch status, which brings many benefits. It intuitively presents the collected current data, environmental parameters, bypass switch status and phase sequence parameters to the operator, so that the staff can understand the key information such as the operating status, environmental conditions and switch position status of the equipment in real time without complex detection, which is convenient for remote monitoring and on-site operation guidance. When receiving abnormal current data, abnormal environmental parameters and abnormal phase sequence information, it can quickly generate control instructions based on the pre-set logic and the current status of the bypass switch, realizing intelligent control of equipment operation. For example, when the current is overloaded, it is combined with the switch status to determine whether it is necessary to open the switch immediately to protect the equipment; when the phase sequence is wrong, the closing operation is prohibited to prevent accidents. This automatic control instruction generation mechanism improves the response speed and accuracy of the system, reduces the risk of errors caused by manual judgment and operation, and at the same time improves the safety and reliability of the entire power system, ensuring that the equipment can be properly controlled and protected under various working conditions.

[0027] The switch control module receives control instructions and controls the single-phase bypass load switch to perform opening or closing operations.

[0028] The switch control module receives control instructions and controls the single-phase bypass load switch to open or close the switch, playing a key execution role. Its beneficial effect is that it can accurately and quickly respond to the instructions issued by the display control module to realize remote or automatic control of the single-phase bypass load switch. When opening the switch is required, for example, when the system detects overload, short circuit, phase sequence error, or receives a remote shutdown instruction, it can timely and reliably disconnect the switch, cut off the fault circuit or stop the equipment from running, effectively protect the power system and equipment from further damage, prevent the expansion of the fault, and ensure the safety of personnel and equipment. During the closing operation, ensure that the closing action is accurately executed when all system conditions meet the normal operating requirements (such as normal current, correct phase sequence, suitable environment, etc.), restore power supply or perform load transfer operations, and ensure the stable operation of the power system. The existence of this module enables the control decision of the entire control system to be effectively implemented, improves the convenience and automation of power system operation, reduces the risk and workload of manual on-site operation, and enhances the flexibility and controllability of power system operation.

[0029] Optionally, as an embodiment of the present invention, the data judgment module specifically includes: Abnormal current data includes safety data that exceeds the set safety upper limit or has unstable fluctuations; When the current data is abnormal, an opening control instruction is generated, and when the current data is normal, a closing control instruction is generated; The current data is collected in real time through built-in or external current sensors. When the current exceeds the set safety upper limit or fluctuates unstably, it may indicate that the system is at risk of overload, short circuit or other faults. At this time, it may be necessary to close the switch to protect the safety of the equipment and lines and avoid further damage to the equipment; conversely, when the current is within the normal range and the system needs to restore normal power supply or perform load transfer operations, it may be determined that the switch needs to be closed.

[0030] The abnormal environmental parameters include temperature data exceeding a temperature threshold and / or humidity data exceeding a humidity threshold; When the environmental parameters are abnormal, an opening control command is generated, and when the environmental parameters are normal, a closing control command is generated; The data collected by the ambient temperature and humidity sensors will also affect the judgment of closing or shutting the switch. If the ambient temperature is too high, close to or exceeding the temperature threshold for normal operation of the equipment, it may cause difficulty in heat dissipation of the equipment, affecting its performance and life. At this time, you may consider shutting down the switch to avoid overheating and damage to the equipment; when the environmental conditions return to normal and the system has power supply needs, you can close the switch to restore power. A high humidity environment may affect the insulation performance of the equipment. If the humidity reaches a level that may cause insulation failure, the switch may also be closed for precautionary measures. After the humidity drops to a safe range, decide whether to close the switch based on the actual situation.

[0031] Abnormal phase sequence parameters include phase sequence parameters of the backup power supply and the main power supply being out of phase; When the phase sequence parameters are abnormal, an opening control command is generated, and when the phase sequence parameters are normal, a closing control command is generated; The phase detector will detect the phase sequence of the circuit. When the phase detector detects different phases, in order to prevent serious consequences caused by wrong phase connection, the remote closing circuit and the local closing circuit will be disconnected by relay dry node mode, and the mobile phone APP will issue a warning and prohibit closing. Only when the phase detector detects the correct phase sequence, the closing operation is allowed to ensure the normal operation of the power system.

[0032] Optionally, as an embodiment of the present invention, the display control module further displays warning information, and the warning information is obtained based on the current data abnormality and / or the environmental parameter abnormality and / or the phase sequence parameter abnormality.

[0033] Optionally, as an embodiment of the present invention, the single-phase bypass load switch state includes an open or closed state of the switch, a local or remote operation trigger state, When the opening or closing state of the switch is consistent with the opening instruction or closing instruction, the single-phase bypass load switch will no longer perform opening or closing operations; When the single-phase bypass load switch is in the local operation trigger state, the user manually or electrically controls the opening or closing command of the single-phase bypass load switch locally; When the single-phase bypass load switch is in the remote operation trigger state, the user remotely controls the opening or closing command of the single-phase bypass load switch based on the remote controller. Optionally, as an embodiment of the present invention, the control system includes a data acquisition module, a mobile phone APP, a remote control, an on-site control module, etc. The data acquisition module includes current acquisition, environmental parameter acquisition, bypass switch status acquisition, automatic phase verification, etc. The main function is to complete data acquisition and send data to the mobile phone APP end, which is convenient for subsequent control and bypass load switch status monitoring. Environmental parameters include ambient temperature acquisition and humidity acquisition. The bypass load switch state includes a disconnected state and a connected state. The phase verification function mainly prevents the different phase circuits from being connected to the loop on site. The mobile phone APP can find it in time and prohibit closing while issuing a warning. When the on-site phase detector detects different phases, the remote closing circuit and the on-site closing circuit are disconnected by a relay dry node. The main function of the mobile phone APP end is to obtain the status of the bypass load switch, the surrounding environmental parameters, the phase detector parameters, the current parameters, the battery offline alarm, and the battery status in real time, which is convenient for remote supervision. The main function of the remote control is to remotely control the bypass load switch to open and close, and the remote control distance is 1km.

[0034] Reference Figure 2A single-phase bypass load switch, which executes the above-mentioned single-phase bypass load switch control system when implemented, comprises: a single-phase bypass load switch body, a switching switch, a local operating mechanism, and a remote operating mechanism, wherein the switching switch, the local operating mechanism, and the remote operating mechanism are all arranged on the single-phase bypass load switch body, and the switching switch connects the single-phase bypass load switch body with the local operating mechanism or the remote operating mechanism.

[0035] Optionally, as an embodiment of the present invention, the single-phase bypass load switch body includes: a gas box, an operating handle, a spring mechanism, a data acquisition device and a quick plug-in connector. The spring mechanism and the quick plug-in head are both arranged in the gas box, the quick plug-in head is connected to the external cable and the single-phase bypass load switch, the gas box is filled with SF6 gas, the data acquisition device is used to collect data related to the gas box, and the operating handle is connected to the spring mechanism inside the gas box through a reserved interface on the gas box. The data acquisition device includes a counter, a phase detector, a built-in current sensor or an external current sensor.

[0036] The main function of the gas box is to combine the spring mechanism, moving and static contacts, and quick plug-in connectors to protect the internal SF6 gas from leakage. The main function of the operating handle and spring operating mechanism is to complete manual operation, and the spring mechanism provides part of the power, making the operation simple and lightweight. The counter realizes the mechanical counting of the number of opening and closing. The phase checker realizes the phase check function. The pressure gauge will display the gas box pressure. The quick plug-in connector realizes external cable connection and quick replacement. The built-in current sensor realizes current collection and measurement, which is repeated with the external current sensor and can be built-in or external according to needs.

[0037] Optionally, as an embodiment of the present invention, the local operating mechanism includes a four-bar linkage, and the four-bar linkage includes an upper crank arm and a lower crank arm, and the upper crank arm and the lower crank arm, as well as the lower crank arm and the handle are fixedly connected by pins.

[0038] Optionally, as an embodiment of the present invention, the four-bar linkage mechanism further includes a motor, and one end of the upper crank arm is fixedly connected to the motor for transmitting the force of the motor to the four-bar linkage mechanism.

[0039] Optionally, as an embodiment of the present invention, it also includes a battery and a motor mechanism, which are arranged in the single-phase bypass load switch body and connected to the motor. The main function is to provide power to the local electric operation module and provide power to it, realize the opening and closing of the bypass load switch, and upload the opening and closing state signal of the bypass load switch to the remote operation mechanism (control board) through the auxiliary contact.

[0040] Optionally, as an embodiment of the present invention, the remote operation mechanism (control board) is mainly composed of a current acquisition circuit, a 4G module, a remote control module, a temperature and humidity sensor, and a control circuit. The main function is to realize data acquisition and transmission, receive control instructions from the remote control, and send data to the mobile phone APP through the 4G module. Data acquisition mainly collects current, opening and closing status, temperature and humidity, battery power, etc.

[0041] Optionally, as an embodiment of the present invention, the switch realizes interlocking of local operation and remote operation to avoid misclosing or misopening the bypass load switch.

[0042] Therefore, the technical effects that can be achieved by this embodiment can be found in the description above and will not be repeated here.

[0043] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0044] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0045] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A single-phase bypass load switch control system, characterized in that: include: Data acquisition module, real-time acquisition of current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; The data judgment module obtains abnormal current data, abnormal environmental parameters and abnormal phase sequence parameters based on the real-time collected current data, environmental parameters, single-phase bypass load switch status and phase sequence parameters; Display control module, receiving and displaying real-time collected current data, environmental parameters, bypass switch status and phase sequence parameters, receiving abnormal current data, abnormal environmental parameters and abnormal phase sequence and generating control instructions in combination with bypass switch status; The switch control module receives control instructions and controls the single-phase bypass load switch to perform opening or closing operations.

2. The single-phase bypass load switch control system according to claim 1, characterized in that: The data judgment module specifically includes: Abnormal current data includes safety data that exceeds the set safety upper limit or has unstable fluctuations; When the current data is abnormal, an opening control instruction is generated, and when the current data is normal, a closing control instruction is generated; The abnormal environmental parameters include temperature data exceeding a temperature threshold and / or humidity data exceeding a humidity threshold; When the environmental parameters are abnormal, an opening control command is generated, and when the environmental parameters are normal, a closing control command is generated; Abnormal phase sequence parameters include phase sequence parameters of the backup power supply and the main power supply being out of phase; When the phase sequence parameters are abnormal, an opening control command is generated, and when the phase sequence parameters are normal, a closing control command is generated.

3. The single-phase bypass load switch control system according to claim 1, characterized in that: The display control module further displays warning information, where the warning information is obtained based on the current data abnormality and / or the environmental parameter abnormality and / or the phase sequence parameter abnormality.

4. The single-phase bypass load switch control system according to claim 2, characterized in that: The single-phase bypass load switch state includes the switch opening or closing state, the local or remote operation trigger state, When the opening or closing state of the switch is consistent with the opening instruction or closing instruction, the single-phase bypass load switch will no longer perform opening or closing operations; When the single-phase bypass load switch is in the local operation trigger state, the user manually or electrically controls the opening or closing command of the single-phase bypass load switch locally; When the single-phase bypass load switch is in the remote operation trigger state, the user remotely controls the opening or closing command of the single-phase bypass load switch based on the remote controller.

5. A single-phase bypass load switch, characterized in that: When implemented, the single-phase bypass load switch control system as described in any one of claims 1 to 4 is executed, and the single-phase bypass load switch includes: a single-phase bypass load switch body, a switching switch, a local operating mechanism, and a remote operating mechanism. The switching switch, the local operating mechanism, and the remote operating mechanism are all arranged on the single-phase bypass load switch body, and the switching switch connects the single-phase bypass load switch body with the local operating mechanism or the remote operating mechanism.

6. The single-phase bypass load switch according to claim 5, characterized in that: The single-phase bypass load switch body includes: a gas box, an operating handle, a spring mechanism, a data acquisition device and a quick plug-in connector. The spring mechanism and the quick-plug head are both arranged in the gas box. The quick-plug head connects the external cable and the single-phase bypass load switch. The gas box is filled with SF6 gas. The data acquisition device is used to collect data related to the gas box. The operating handle is connected to the spring mechanism inside the gas box through a reserved interface on the gas box.

7. The single-phase bypass load switch according to claim 6, characterized in that: The local operating mechanism comprises a four-bar linkage, and the four-bar linkage comprises an upper crank arm and a lower crank arm. The upper crank arm and the lower crank arm, as well as the lower crank arm and the handle are fixedly connected by latch pins.

8. The single-phase bypass load switch according to claim 7, characterized in that: The four-bar linkage also includes a motor, and one end of the upper crank arm is fixedly connected to the motor for transmitting the force of the motor to the four-bar linkage.

9. The single-phase bypass load switch according to claim 8, characterized in that: It also includes a battery and a motor mechanism, which are arranged in the single-phase bypass load switch body and connected to the motor.

10. The single-phase bypass load switch according to claim 5, characterized in that: The remote operation mechanism includes a 4G unit, a remote control unit and a control circuit arranged on the single-phase bypass load switch body. The 4G unit sends data to the client, the remote control unit receives control instructions, and controls the single-phase bypass load switch to open or close through the control circuit.

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