Special backup protection device for lightning protection

Abstract

The utility model relates to a special backup protection device for lightning protection. Comprising a cabinet body with an openable cabinet door, an access wire pipe sleeve is installed at the top of the cabinet body, a grounding wire pipe sleeve is installed at the bottom of the cabinet body, a first installation guide rail is installed on the upper portion in the cabinet body, a second installation guide rail is installed on the lower portion in the cabinet body, a backup protector is installed on the first installation guide rail, and a surge protector is installed on the second installation guide rail. The access cable enters the cabinet body through the access cable pipe sleeve and is connected with the backup protector, the backup protector is connected with the surge protector through the connecting cable, and the grounding wire enters the cabinet body through the grounding wire pipe sleeve and is connected with the surge protector; each connecting cable is provided with a current transformer, the cabinet body is also internally provided with a state monitor, and each current transformer is connected with the state monitor. The utility model provides a lightning protection dedicated backup protection device, which improves the operation convenience of installation and use, and has the capability of state monitoring.

Description

Technical Field

[0001] The utility model belongs to the technical field of lightning protection and lightning driving equipment, and particularly relates to a special lightning protection backup protection device. Background Art

[0002] A lightning protection device is a protection device applied to a low-voltage power network to protect electrical appliances from lightning strikes. It can limit the instantaneous overvoltage in the system and discharge the surge current, and is widely used in power supply equipment for power supply and distribution in all walks of life of the national economy. A lightning protection backup protection device usually includes a surge protector and a backup protector. Among them, the surge protector, also called a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in an extremely short time, thereby avoiding damage to other devices in the circuit caused by the surge. The backup protector is installed in front of the surge protector. On the one hand, it can disconnect and trip when a continuous short-circuit current flows through, playing a protective role. On the other hand, it keeps the discharge path closed and does not trip when an instantaneous lightning current flows through.

[0003] The existing lightning protection backup protection devices have the following problems: First, the existing devices do not constitute a systematic facility and need to be constructed on site according to the installation requirements, involving a large amount of installation and wiring operations, resulting in cumbersome installation. Second, the existing lightning protection backup protection devices do not have the ability to monitor the status, neither can they record the lightning strike situation nor can they feedback the working status.

[0004] In summary, it is necessary to develop and design a new type of special lightning protection backup protection device to solve the above-mentioned technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a special lightning protection backup protection device, which improves the operation convenience of installation and use and has the ability of status monitoring.

[0006] The technical solution adopted by the utility model is: a special lightning protection backup protection device, including a cabinet body with an openable cabinet door. An access wire pipe sleeve is installed on the top of the cabinet body, and a grounding wire pipe sleeve is installed on the bottom of the cabinet body. A first installation guide rail is installed in the upper part of the cabinet body, and a second installation guide rail is installed in the lower part of the cabinet body. A backup protector is installed on the first installation guide rail, and a surge protector is installed on the second installation guide rail. The access cable enters the interior of the cabinet body through the access wire pipe sleeve and is connected to the backup protector. The backup protector is connected to the surge protector through a connection cable. The grounding wire enters the interior of the cabinet body through the grounding wire pipe sleeve and is connected to the surge protector. Current transformers are installed on each connection cable, and a status monitor is also installed in the cabinet body. Each current transformer is connected to the status monitor.

[0007] Preferably, a main switch is also installed inside the cabinet body. The backup protector is connected to the main switch through a connecting cable, the main switch is connected to the surge protector through a connecting cable, and each current transformer is installed on the connecting cable between the main switch and the surge protector.

[0008] Preferably, the status monitor includes a controller module and a plurality of analog-to-digital conversion modules connected to the controller module. Each current transformer is connected to each analog-to-digital conversion module, and it also includes a power supply module, a storage module, and a wireless transmission module connected to the controller module.

[0009] Preferably, a terminal block is also installed on the second installation rail, and the wire harnesses of each current transformer and the wire harness of the status monitor are connected through the terminal block.

[0010] Preferably, a display screen is also installed on the cabinet door, and the display screen is connected to the controller module of the status monitor through a wire harness.

[0011] Preferably, a "day"-shaped wiring groove composed of a wiring frame and a wiring housing is also installed inside the cabinet body, and the connecting cables and wire harnesses inside the cabinet body extend and are routed in the wiring groove.

[0012] Preferably, the cabinet door and the cabinet body are hinged and connected by a hinge, and a lock is also installed on the cabinet door.

[0013] The advantages and positive effects of the present utility model are:

[0014] The present utility model provides a lightning protection special backup protection device with a reasonable structural design. Compared with the existing lightning protection backup protection devices, the backup protection device in the present utility model is a complete set of facilities, which can be transported to the installation site as a whole and put into installation and use. Since the backup protector and the surge protector are pre-installed inside, it provides a standardized lightning protection function, gives full play to the functions of the backup protector and the surge protector, and improves the operation convenience of connecting the access wire and the grounding wire by setting an access wire pipe sleeve and a grounding wire pipe sleeve on the cabinet body.

[0015] In the backup protection device of the present utility model, by installing current transformers on each connecting cable inside the cabinet body and setting a status monitor, the status of the backup protection device is monitored by monitoring the current in the connecting cable through the current transformer, and it can record the lightning strike situation and also give feedback on the working status. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view structural schematic diagram of the present utility model;

[0017] Figure 2 is the three-dimensional structure diagram of the main part of the present utility model;

[0018] Figure 3 is Figure 1 the structural block diagram of the status monitor in

[0019] In the figure:

[0020] 1. Lock; 2. Display screen; 3. Cabinet door; 4. Hinge; 5. Cabinet body; 6. Access wire pipe sleeve; 7. Main switch; 8. Backup protector; 9. First installation rail; 10. Current transformer; 11. Status monitor; 12. Wiring frame; 13. Wiring frame body; 14. Second installation rail; 15. Surge protector; 16. Terminal; 17. Ground wire pipe sleeve. Specific implementation manner

[0021] In order to further understand the invention content, characteristics and efficacy of the present utility model, the following embodiments are given for detailed description.

[0022] Please refer to Figure 1 and Figure 2 , the lightning protection special backup protection device of the present utility model includes a cabinet body 5 with an openable cabinet door 2. As shown in the figure, the cabinet door 3 and the cabinet body 5 are hinged and connected by a hinge 4, and a lock 1 is also installed on the cabinet door 3.

[0023] An access wire pipe sleeve 6 is installed on the top of the cabinet body 5, and a ground wire pipe sleeve 17 is installed at the bottom. The access wire pipe sleeve 6 is used for threading and connecting the access wire, and the ground wire pipe sleeve 17 is used for threading and connecting the ground wire.

[0024] A first installation rail 9 is installed in the upper part inside the cabinet body 5, and a second installation rail 14 is installed in the lower part inside. The first installation rail 9 and the second installation rail 14 are both used for installing internal components. A backup protector 8 is installed on the first installation rail 9, and a surge protector 15 is installed on the second installation rail 14. The access cable enters the inside of the cabinet body 5 through the access wire pipe sleeve 6 and is connected to the backup protector 8. The backup protector 8 is connected to the surge protector 15 through a connection cable. The ground wire enters the inside of the cabinet body 5 through the ground wire pipe sleeve 17 and is connected to the surge protector 15. Therefore, the backup protector 8 is located in front of the surge protector 15.

[0025] In this embodiment, a "day"-shaped wiring groove composed of a wiring frame 12 and a wiring frame body 13 is also installed inside the cabinet body 5. The connection cables and wire harnesses inside the cabinet body 5 extend and are routed in the wiring groove, which can make the wiring inside the cabinet body 5 neat and orderly.

[0026] The backup protector 8 refers to a special circuit breaker for surge protection devices, which is a backup protector designed specifically for surge protectors. It has characteristics such as high surge current tolerance, ultra-low residual voltage, and quick break of small power frequency current. It can cooperate with the surge protector to achieve the best lightning protection effect. The surge protector 15 is a device used to prevent lightning and other transient overvoltages from damaging electrical equipment. The backup protector 8 is installed at the front end of the surge protector 15 to break the fault current of the surge protector 15, prevent the surge protector 15 from catching fire or exploding, and at the same time ensure that the surge protector 15 does not open under the impact of lightning current, maintaining the effectiveness of the lightning protection. The backup protector 8 (SCB) and the surge protector 15 (SPD) in this patent are both existing components obtained by purchase, and this patent does not involve the improvement of the backup protector 8 and the surge protector 15.

[0027] Current transformers 10 are installed on each connecting cable, and a status monitor 11 is also installed inside the cabinet 5. Each current transformer 10 is connected to the status monitor 11. In this embodiment, a main switch 7 is also installed inside the cabinet 5. The backup protector 8 is connected to the main switch 7 through a connecting cable, the main switch 7 is connected to the surge protector 15 through a connecting cable, and each current transformer 10 is installed on the connecting cable between the main switch 7 and the surge protector 15. The function of setting the current transformer 10 is to monitor the current conditions in each connecting cable. By monitoring the current in each connecting cable, the working conditions of the backup protection device can be judged, lightning strike conditions can be monitored and recorded, so that the power supply status monitoring system can obtain the status information of this backup protection device.

[0028] In this embodiment, a terminal block 16 is also installed on the second mounting rail 14. The wire harnesses of each current transformer 10 and the wire harness of the status monitor 11 are connected through the terminal block 16. By setting the terminal block 16, the operation convenience of the connection between wire harnesses can be improved.

[0029] Please refer to Figure 3 , it can be seen that:

[0030] The status monitor 11 includes a controller module and a plurality of analog-to-digital conversion modules connected to the controller module. Each current transformer 10 is connected to each analog-to-digital conversion module, and it also includes a power module, a storage module, and a wireless transmission module connected to the controller module.

[0031] The analog-to-digital conversion module is used to convert the analog signal generated by the current transformer 10 into a digital signal. The power module includes a lithium-ion battery and a management circuit, which is used to provide power for the status monitor 11. The storage module is used to store status information data, and the wireless transmission module is used to wirelessly transmit the status information to the background management system, enabling the background management personnel to timely know the current status of this lightning protection special backup protection device and go to the site for processing when necessary.

[0032] In this embodiment, a display screen 2 is further installed on the cabinet door 3. The display screen 2 is connected to the controller module of the status monitor 11 through a wire harness. The status monitor 11 displays the status information on the display screen 2 on-site, and the on-site operation and maintenance personnel can obtain the current status information of the device through the status monitor 11.

[0033] Operating principle: When the power supply system is struck by lightning, an instantaneous lightning current is generated in the discharge path. At this time, the backup protector 8 keeps the discharge path closed without tripping. When the lightning current passes through the surge protector 15, the surge protector 15 can conduct and shunt in an extremely short time, thus avoiding damage to other devices in the circuit by the surge. When the current transformer 10 monitors the aforementioned instantaneous lightning current, the status monitor 11 records a lightning strike and the magnitude of the lightning current. When a short-circuit problem occurs in the power supply system, a continuous short-circuit current will flow through the discharge path. At this time, the backup protector 8 should trip to open the discharge path to prevent the subsequent surge protector 15 from continuously passing current and causing the temperature to rise or even burn out. In this case, the current transformer 10 monitors that there is no current passing through the connection cable. The continuous absence of current represents an open-circuit state, and this status information is sent to the background management system through the status monitor 11. The operation and maintenance personnel can operate the backup protector 8 to re-close after eliminating the short-circuit fault.

Claims

1. A dedicated lightning protection backup protection device, characterized in that: It includes a cabinet body (5) with an openable cabinet door (3). An access wire tube sleeve (6) is installed at the top of the cabinet body (5), and a grounding wire tube sleeve (17) is installed at the bottom. A first installation guide rail (9) is installed in the upper part inside the cabinet body (5), and a second installation guide rail (14) is installed in the lower part inside. A backup protector (8) is installed on the first installation guide rail (9), and a surge protector (15) is installed on the second installation guide rail (14). The access cable enters the inside of the cabinet body (5) through the access wire tube sleeve (6) and is connected to the backup protector (8). The backup protector (8) is connected to the surge protector (15) through a connection cable. The grounding wire enters the inside of the cabinet body (5) through the grounding wire tube sleeve (17) and is connected to the surge protector (15). Current transformers (10) are installed on each connection cable, and a status monitor (11) is also installed inside the cabinet body (5). Each current transformer (10) is connected to the status monitor (11).

2. The lightning protection dedicated backup protection device according to claim 1, characterized in that: in A main switch (7) is also installed inside the cabinet body (5). The backup protector (8) is connected to the main switch (7) through a connection cable. The main switch (7) is connected to the surge protector (15) through a connection cable. Each current transformer (10) is installed on the connection cable between the main switch (7) and the surge protector (15).

3. The lightning protection dedicated backup protection device according to claim 2, characterized in that: The status monitor (11) includes a controller module and multiple analog-to-digital conversion modules connected to the controller module. Each current transformer (10) is connected to each analog-to-digital conversion module. It also includes a power module, a storage module, and a wireless transmission module connected to the controller module.

4. The lightning protection dedicated backup protection device according to claim 3, wherein: A terminal block (16) is also installed on the second installation guide rail (14). The wire harnesses of each current transformer (10) and the status monitor (11) are connected through the terminal block (16).

5. The lightning protection dedicated backup protection device according to claim 4, characterized in that: in A display screen (2) is also installed on the cabinet door (3). The display screen (2) is connected to the controller module of the status monitor (11) through a wire harness.

6. The lightning protection dedicated backup protection device according to any one of claims 1 to 5, characterized in that: at An "H"-shaped wiring groove composed of a wiring frame (12) and a wiring frame body (13) is also installed inside the cabinet body (5). The connection cables and wire harnesses inside the cabinet body (5) extend and are routed in the wiring groove.

7. The lightning protection dedicated backup protection device according to any one of claims 1 to 5, characterized in that: The cabinet door (3) is hingedly connected to the cabinet body (5) by a hinge (4). A lock (1) is also installed on the cabinet door (3).

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