0.4 kV bypass load switch device

Abstract

The invention relates to the technical field of operation and maintenance of a power distribution network, and discloses a 0.4 kV bypass load switch device which comprises a box body, a two-way change-over switch installed in the box body, an output cable fast-assembly interface, a generator cable fast-assembly interface and an input cable fast-assembly interface, and the output cable fast-assembly interface, the generator cable fast-assembly interface and the input cable fast-assembly interface are installed on the side wall of the box body and electrically connected with the two-way change-over switch. The 0.4 kV bypass load switch device is connected with a commercial power supply side cable through an input cable fast-assembly interface, is connected with a generator through a generator cable fast-assembly interface, and is connected with an electrical load side cable through an output cable fast-assembly interface. Through the function of establishing a bypass power supply channel by the 0.4 kV bypass load switch device, line power failure within an operation range and no power failure or less power failure of a low-voltage line without operation are realized; when a power failure section is in a key main line or is difficult to bridge due to a long distance, the device can realize access of other power supplies such as a generator car, and continuous power supply in a region without an operation line is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network operation and maintenance, and in particular to a 0.4kV bypass load switch device. Background Art

[0002] In a county's distribution network, there are 1,124 public distribution transformers, more than 160,000 low-voltage users, and more than 3,000 kilometers of low-voltage lines. Due to the wide distribution of the distribution network and complex operational requirements, operation and maintenance work faces huge challenges. In addition, about 360 safety hazard elimination and defect handling operations are performed on low-voltage lines each year. These operations usually require power outages on the low-voltage lines of public distribution transformers, resulting in power outages for all low-voltage users connected to the public distribution transformers.

[0003] The main problems

[0004] 1. Frequent power outages: Low-voltage line operations involve power outages that need to be performed frequently, making it impossible for users to use electricity stably, resulting in power outage complaints and customer dissatisfaction.

[0005] 2 Reduced power supply reliability: Each power outage may affect a large number of users, especially during peak power consumption hours, which has a negative impact on power supply reliability indicators.

[0006] 3. Large workload and low efficiency: For maintenance personnel, dealing with large-scale low-voltage faults and hidden dangers means a huge workload, and the operation and processing time before and after each power outage is long.

[0007] 4. Insufficient emergency response capabilities: In the event of a failure or emergency that requires a quick response, the existing power outage operation causes power outages for users, affecting the provision of emergency services.

[0008] In order to solve the above problems, it is urgent to develop a 0.4kV bypass load switch device. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a 0.4kV bypass load switch device, through which the function of establishing a bypass power supply channel is achieved, so that the lines within the operating range are powered off, and the low-voltage lines without operations are not powered off or have minimal power outages; when the power outage section is in a critical main line or the distance is long and difficult to bridge, the device can achieve access to other power sources such as power generation vehicles to ensure continuous power supply in areas without operating lines.

[0010] The technical solution adopted by the present invention is:

[0011] A 0.4kV bypass load switch device, the 0.4kV bypass load switch device comprising a box, a two-way switch installed in the box, an output cable quick-install interface, a generator cable quick-install interface and an input cable quick-install interface installed on a side wall of the box and electrically connected to the two-way switch;

[0012] The 0.4kV bypass load switch device is connected to the cable on the mains power supply side through the input cable quick-assembly interface, connected to the generator through the generator cable quick-assembly interface, and connected to the cable on the power load side through the output cable quick-assembly interface.

[0013] Furthermore, the box body is a rectangular sealed box body, and a box door is hingedly installed on the front side of the box body.

[0014] Furthermore, the box door is provided with a door lock.

[0015] Furthermore, universal wheels are provided at the four corners of the bottom of the box.

[0016] Furthermore, the universal wheel is provided with a wheel lock.

[0017] Furthermore, a handle is provided on the top of the box body for easy pushing and pulling of the box body.

[0018] Furthermore, the dual-way switch is an automatic dual-power conversion switch.

[0019] Furthermore, the input cable quick-install interface and the output cable quick-install interface can be connected via a dual-way switch, and an ammeter is provided on the conducting circuit, and the ammeter is electrically connected to a current display screen installed on the side wall of the box.

[0020] Furthermore, the generator cable quick-install interface and the output cable quick-install interface can be connected via a dual-way switching switch, and a voltmeter is provided on the conducting circuit, and the voltmeter is electrically connected to a voltage display screen installed on the side wall of the box.

[0021] Furthermore, the input cable quick-connect interface, the generator cable quick-connect interface and the output cable quick-connect interface all include ABCN three-item four-wire interfaces.

[0022] The beneficial effects of the present invention are:

[0023] Technical Effect of 0.4kV Bypass Load Switchgear

[0024] 1. Improve power supply reliability

[0025] The device can realize bypass power supply when operating low-voltage lines, ensuring that power is maintained in non-operating areas, significantly improving the reliability of power supply. By quickly switching power supplies, the impact caused by line power outages is avoided.

[0026] 2. Convenient access method

[0027] The device is equipped with a quick-install interface, which makes the connection and switching process of the AC power, generator and load-end cables simple and efficient, reducing the time and labor costs required for access and improving operational efficiency.

[0028] 3. Enhanced operational safety

[0029] The box is designed with a sealed structure to effectively protect the internal components, waterproof and dustproof, and increase the safety of the equipment. At the same time, the setting of the box door lock further enhances the safety protection of the equipment and prevents misoperation.

[0030] 4. Mobility and flexibility

[0031] The universal wheels and wheel locks installed at the bottom make the movement of the device in different working environments more convenient and flexible. It can be quickly deployed to the required location and adapt to a variety of working scenarios.

[0032] 5. Real-time monitoring function

[0033] By installing ammeters and voltmeters between the input and output cable quick-release interfaces and equipping them with corresponding display screens, operators can monitor current and voltage in real time, understand the operating status of the equipment in a timely manner, and ensure safe use.

[0034] 6. Intelligent automatic switching

[0035] The application of automatic dual power transfer switch realizes the intelligent management of equipment, which can switch freely under various power supply conditions, reduces the risk of manual operation and improves the reliability of power supply switching.

[0036] 7. Strong adaptability

[0037] It supports the access of external power sources such as generator trucks to ensure continuous power supply to important loads even in special circumstances (such as main power failure). It is particularly suitable for places with high requirements for power supply security, such as industry, construction and critical infrastructure.

[0038] 8. Structural optimization

[0039] The rectangular sealed box is reasonably designed, making full use of the space, while facilitating information display and operation, improving the overall user experience.

[0040] In summary, the 0.4kV bypass load switch device performs outstandingly in ensuring safety, improving power supply stability and operating convenience. It is an innovative device with high practical value in low-voltage power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0042] Figure 1 and Figure 2 This is a structural diagram of a 0.4kV bypass load switch device of the present invention;

[0043] Figure 3 It is a line connection diagram of the utility power supply side cable, generator cable, power load side cable, and double-way switch of the present invention;

[0044] In the figure: 1. Box body; 2. Two-way switching switch; 3. Output cable quick-install interface; 4. Generator cable quick-install interface; 5. Input cable quick-install interface; 6. Box door; 7. Door lock; 8. Universal wheel; 9. Wheel lock; 10. Handle; 11. Current display screen; 12. Voltage display screen. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0046] At present, in the operation and maintenance of public distribution transformers in the distribution network, there are many problems such as wide working areas, huge workload, frequent power outages for low-voltage users, and long power outages. There are many public transformers, a large number of low-voltage users, and long spans of low-voltage lines. Every year, many low-voltage line safety hazard elimination and line extension operations are carried out. Basically, all low-voltage line operations require power outages on the public distribution transformer low-voltage lines, that is, pull out the public distribution transformer fuse or disconnect the circuit breaker in the JP cabinet, and all users below the public distribution transformer are out of power. Not only does it seriously affect the power supply reliability index, but it also has a high risk of user power outage complaints. It is urgent to find an effective solution.

[0047] Therefore, this embodiment provides a 0.4kV bypass load switch device, through which the low-voltage line operation in the substation area can be completed while ensuring safety, and power outages for users can be reduced or avoided, thereby achieving the goal of improving power supply reliability and improving customer satisfaction with power supply services.

[0048] Specifically, Figure 1 and Figure 2As shown, the 0.4kV bypass load switch device includes a box body 1, a two-way switch 2 installed in the box body 1, and an output cable quick-install interface 3, a generator cable quick-install interface 4, and an input cable quick-install interface 5 installed on the side wall of the box body 1 and electrically connected to the two-way switch 2. The 0.4kV bypass load switch device can be connected to the cable on the mains power supply side through the input cable quick-install interface 5, can be connected to the generator through the generator cable quick-install interface 4, and can be connected to the cable on the power load side through the output cable quick-install interface 3.

[0049] The input cable quick-assembly interface 5, the generator cable quick-assembly interface 4 and the output cable quick-assembly interface 3 all include three-item four-wire interfaces, ABCN, and each interface is an aviation socket; the AC power supply side cable, the generator cable, and the load side cable are all installed with aviation plugs that can be quickly plugged in.

[0050] like Figure 3 As shown, the function of the two-way switch 2 is to enable conduction between the input cable quick-install interface 5 and the output cable quick-install interface 3 through the two-way switch 2, or to enable conduction between the generator cable quick-install interface 4 and the output cable quick-install interface 3 through the two-way switch 2.

[0051] The dual-circuit switch 2 can be a manual switch, such as a circuit breaker, an isolating switch, etc. When a manual switch is used, the dual-circuit switch 2 is manually controlled to be on or off at the corresponding position after selecting the cable power supply or the generator power supply on the bypass mains power supply side.

[0052] The dual-way switch 2 can also use a commercially available automatic dual-power transfer switch, such as the ATS dual-power automatic switch / conversion switch for the dual-circuit power supply of the Lingdong generator. The advantage of the automatic dual-power transfer switch is that it is more intelligent and can monitor whether there is voltage on the bypass mains power supply side and the generator power supply side;

[0053] If there is voltage on both the bypass mains power supply side and the generator power supply side, the bypass mains power supply is preferentially used to supply power to the load side; if there is no voltage on the bypass mains power supply side, the generator is used to supply power to the load side.

[0054] The 0.4kV bypass load switch device can avoid power outages for users below the public distribution transformer when operating low-voltage lines without pulling out the public distribution transformer fuse or disconnecting the circuit breaker in the JP cabinet. This significantly improves the continuity and reliability of power supply.

[0055] The 0.4kV bypass load switch device reduces the frequency of power outages for users and significantly shortens the outage time, which can improve customers' overall satisfaction with power supply services and reduce the pressure of complaints from users due to power outages.

[0056] The 0.4kV bypass load switch device can flexibly select the mains power supply or the generator power supply through the dual-way switch 2, thereby improving the flexibility and adaptability of the power supply. When the mains power fails, the system can quickly switch to the backup power supply to ensure the continuous power supply of the power load.

[0057] The 0.4kV bypass load switch device can operate under the premise of ensuring safety, reducing the potential safety hazards caused by power outages. At the same time, the design of the aviation socket makes connection and disconnection safer and more convenient.

[0058] The 0.4kV bypass load switch device can reduce the number and duration of power outages for low-voltage users, reduce the economic losses caused by complaints and failures due to power outages, and thus reduce operation and maintenance costs.

[0059] The 0.4kV bypass load switch device adopts an automatic dual power transfer switch with intelligent monitoring function. It can dynamically sense the power status and automatically switch power supply, improving system management efficiency and stability.

[0060] Since the 0.4kV bypass load switch device can be used to perform line operations without power outage, the efficiency of operation and maintenance work is further improved and the time cost caused by power outage operations is reduced.

[0061] The 0.4kV bypass load switch device can be seamlessly integrated with the existing network architecture, achieving compatibility with existing low-voltage lines, allowing the existing distribution network to adapt to new operational requirements without interfering with operation.

[0062] In summary, the implementation of the 0.4kV bypass load switch device can effectively solve the problem of frequent power outages for low-voltage users, improve the reliability and flexibility of power supply, and thus improve user satisfaction.

[0063] Further, as the preferred technical solution of this embodiment:

[0064] like Figure 1 and Figure 2 As shown, the box body 1 is a rectangular sealed box body 1, and a box door 6 is hingedly installed on the front side; a door lock 7 is provided on the box door 6. Universal wheels 8 are provided at the four corners of the bottom of the box body 1; wheel locks 9 are provided on the universal wheels 8. A handle 10 is provided on the top of the box body 1 for easy pushing and pulling of the box body 1.

[0065] The 0.4kV bypass load switch device adopts the above box 1 structure, which is convenient for moving in different locations. The operation and maintenance personnel can flexibly adjust the equipment position to improve work efficiency. The design of the sealed box 1 and the door lock 7 can protect the internal equipment, prevent unauthorized operation by non-staff, and improve the safety of the operation. In addition to facilitating the movement of the 0.4kV bypass load switch device, the handle 10 on the box 1 can also cooperate with hoisting, so that the 0.4kV bypass load switch device can be quickly loaded and unloaded for easy transportation.

[0066] Furthermore, as the preferred technical solution of this embodiment:

[0067] like Figure 1 and Figure 3 As shown, the input cable quick-install interface 5 and the output cable quick-install interface 3 can be connected through a two-way switch 2, and an ammeter is provided on the conductive circuit, and the ammeter is electrically connected to a current display screen 11 installed on the side wall of the box 1. The generator cable quick-install interface 4 and the output cable quick-install interface 3 can be connected through a two-way switch 2, and a voltmeter is provided on the conductive circuit, and the voltmeter is electrically connected to a voltage display screen 12 installed on the side wall of the box 1.

[0068] The ammeter and voltmeter can monitor the current and voltage data of the system in real time. This can provide necessary real-time operation information for engineers and operation and maintenance personnel, helping them understand the status of the equipment and load changes. Through the current display screen 11 and the voltage display screen 12, operators can easily view the current and voltage data without manual measurement on site, thereby improving work efficiency.

[0069] By monitoring current and voltage in real time, any abnormal conditions, such as overload, short circuit or voltage instability, can be detected in time, so that timely measures can be taken to ensure the safety of equipment and users. When performing inspection or maintenance operations, operators can confirm the electrical status through the display screen to ensure that they will not operate when the equipment is not completely disabled, reducing the risk of accidents.

[0070] In the event of a fault, the data from the ammeter and voltmeter can help maintenance personnel quickly and accurately locate the problem and reduce the time for troubleshooting. This is crucial for improving emergency response capabilities and reducing power outages. The recorded historical data can also analyze the interaction between generators and loads, help identify potential failure modes, and develop more effective maintenance plans.

[0071] Through more accurate current and voltage monitoring, operation and maintenance personnel can reasonably allocate resources according to load conditions and power supply requirements, avoid power outages caused by excessive load, and improve overall power supply reliability. Reducing the number and duration of power outages for users will also improve customer satisfaction.

[0072] Based on the above 0.4kV bypass load switch device, this embodiment also proposes an operation method for a low-voltage line in an area, and the operation method for a low-voltage line in an area specifically includes the following steps:

[0073] Step 1: Use the handle 10 on the top of the 0.4kV bypass load switch device box 1 to hoist the 0.4kV bypass load switch device onto a transport vehicle, and use the transport vehicle to transport the 0.4kV bypass load switch device to the low-voltage line operation site of the substation area.

[0074] Step 2: Use the handle 10 on the top of the 0.4kV bypass load switch device box 1 to lift the 0.4kV bypass load switch device to the ground, and move it to a designated position through the handle 10 on the top of the 0.4kV bypass load switch device box 1.

[0075] Step 3, connect the 0.4kV bypass load switch device to the cable on the mains power supply side through the input cable quick-assembly interface 5, connect it to the generator through the generator cable quick-assembly interface 4, and connect it to the cable on the power load side through the output cable quick-assembly interface 3.

[0076] Step 4, monitor whether there is voltage on the bypass mains power supply side and the generator power supply side through the automatic dual power supply conversion switch of the 0.4kV bypass load switch device; if there is voltage on both the bypass mains power supply side and the generator power supply side, the bypass mains power supply is preferentially used to supply power to the power load side; if there is no voltage on the bypass mains power supply side, the generator is used to supply power to the power load side.

[0077] The above steps can be used to complete the operation of the low-voltage lines in the substation area, reducing or avoiding power outages for users.

[0078] By using the bypass load switch device, it is ensured that in the event of a city power outage, the generator can switch power supply in time, reducing the power outage time for users and improving the reliability of power supply.

[0079] Clear step-by-step guidance enables operators to get started quickly, reduces complexity and uncertainty during operation, and improves work efficiency.

[0080] The application of automatic dual power transfer switch can monitor the power supply status in real time and automatically switch the power supply, reducing the risk of human error and enhancing operation safety.

[0081] This method allows the flexible use of multiple power sources (mains power and generators), improves the adaptability of the system, and can effectively respond to different work sites and power requirements.

[0082] By designing a reasonable lifting and transportation solution, the need for heavy tools and manpower is reduced, thereby reducing labor costs and improving work efficiency.

[0083] In the event of a mains power failure, it can quickly switch to generator power supply to ensure that the user's normal electricity needs are not affected by the power outage.

[0084] The clear interface design makes equipment installation and maintenance more convenient, which helps to extend the service life of the equipment and reduce maintenance costs.

[0085] Through the above method, the operation of low-voltage lines in the substation area can effectively improve the reliability and flexibility of the overall power supply, and provide users with more efficient and stable power services.

[0086] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 0.4kV bypass load switch device, characterized in that: The 0.4kV bypass load switch device comprises a box, a dual-way switch installed in the box, an output cable quick-install interface, a generator cable quick-install interface and an input cable quick-install interface installed on the side wall of the box and electrically connected to the dual-way switch; The 0.4kV bypass load switch device is connected to the cable on the mains power supply side through the input cable quick-assembly interface, connected to the generator through the generator cable quick-assembly interface, and connected to the cable on the power load side through the output cable quick-assembly interface.

2. The 0.4kV bypass load switch device according to claim 1, characterized in that: The box body is a rectangular sealed box body, and a box door is hingedly installed on the front side of the box body.

3. The 0.4kV bypass load switch device according to claim 2, characterized in that: The box door is provided with a door lock.

4. The 0.4kV bypass load switch device according to claim 1, characterized in that: Universal wheels are arranged at the four corners of the bottom of the box.

5. The 0.4kV bypass load switch device according to claim 4, characterized in that: The universal wheel is provided with a wheel lock.

6. The 0.4kV bypass load switch device according to claim 1, characterized in that: The top of the box body is provided with a handle which is convenient for pushing and pulling the box body.

7. The 0.4kV bypass load switch device according to claim 1, characterized in that: The dual-way switching switch is an automatic dual-power conversion switch.

8. The 0.4kV bypass load switch device according to claim 1, characterized in that: The input cable quick-install interface and the output cable quick-install interface can be connected via a dual-way switch, and an ammeter is provided on the conducting circuit, and the ammeter is electrically connected to a current display screen installed on the side wall of the box.

9. The 0.4kV bypass load switch device according to claim 1, characterized in that: The generator cable quick-install interface and the output cable quick-install interface can be connected via a dual-way switching switch, and a voltmeter is provided on the conducting circuit, and the voltmeter is electrically connected to a voltage display screen installed on the side wall of the box.

10. The 0.4kV bypass load switch device according to claim 1, characterized in that: The input cable quick-assembly interface, the generator cable quick-assembly interface and the output cable quick-assembly interface all include three-item four-wire interfaces, ABCN.

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