Current-leakage protection device and telecommunication network system

Abstract

The present application relates to a current-leakage protection device and a telecommunication network system. The current-leakage protection device comprises: a shell; and a first connector and a second connector, which are mounted on the shell and are configured to connect to an external apparatus. The current-leakage protection device further comprises a current-leakage protection module, wherein the current-leakage protection module is connected in series with the first connector and the second connector, and comprises a current-leakage protection assembly, the current-leakage protection assembly being configured in such a way that when a current is greater than a preset current, a circuit of the current-leakage protection assembly can be disconnected, thereby cutting off the path of a leakage current, which means that the leakage current cannot be conducted to the second connector, and thus a relatively large leakage current is prevented from causing damage to the external apparatus connected to the current-leakage protection device.

Description

Leakage protection device and telecommunication network system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 15, 2023, with application number 202322533687.2 and invention name “A leakage protection device and telecommunications network system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of communication technology, and in particular to a leakage protection device and a telecommunication network system. Background Art

[0003] Telecommunications network systems include telecommunications network equipment, such as switches. Switches are network devices used for forwarding electrical (or optical) signals, providing an electrical signal path between any two terminal devices connected to the switch. Specifically, a terminal device is connected to the telecommunications network equipment via a network cable. The terminal device may be a wireless access point (AP) or a camera. During the installation of telecommunications network systems, poor grounding of terminal devices is common. Low- or high-voltage leakage currents can pass through the terminal device or connect to the network cable, introducing abnormal energy into the network ports of the telecommunications network equipment. This can damage the equipment, interrupt Ethernet services, and affect normal device communications.

[0004] Application Contents

[0005] The present application provides a leakage protection device, which includes:

[0006] case;

[0007] A first connector and a second connector are mounted on the housing, and the first connector and the second connector are respectively used to connect to an external device;

[0008] In which, the leakage protection device also includes a leakage protection module, which is connected in series with the first connector and the second connector. The leakage protection module includes a leakage protection component, and the leakage protection component is configured so that the circuit of the leakage protection component can be disconnected when the current is greater than a preset current.

[0009] In this embodiment, when a leakage current greater than a preset current passes through the leakage protection device, the circuit of the leakage protection component is disconnected, thereby cutting off the leakage current path, that is, the leakage current cannot be transmitted to the second connector, preventing the large leakage current from causing damage to the external device connected to the leakage protection device. When the leakage protection device is used in a telecommunications network system, the embodiment of the present application can enable the telecommunications network system to have a network port leakage protection function without replacing the existing telecommunications network equipment by connecting the network port leakage protection device in series between the telecommunications network equipment and the terminal equipment. At the same time, the leakage protection device does not affect the transmission of Ethernet signals and Ethernet power supply (Power Over Ethernet, POE power supply), while also having a network port leakage protection function. When the leakage current is greater than the preset current, the leakage protection module of the network port leakage protection device will be quickly disconnected, thereby preventing the leakage energy from entering the telecommunications network equipment, thereby solving the problem of equipment damage caused by leakage in the telecommunications network equipment. Furthermore, since the leakage protection circuit is distributed inside the leakage protection device, rather than inside the telecommunications network equipment, the problem of the high-density layout of the electrode plates of the telecommunications network equipment and the inability to set up a leakage protection circuit is avoided.

[0010] In a specific embodiment, the leakage protection module also includes a network port transformer, the network port transformer has a primary winding and a secondary winding, the first connector is connected to the primary winding, the second connector is connected to the secondary winding, and the leakage protection component is connected to the path of the first connector, the network port transformer and the second connector. When the leakage protection device is used in a telecommunications network system, the network port transformer can not only realize signal transmission between the first connector and the second connector, but also enable the telecommunications network system to realize Ethernet signal transmission and POE power supply. In addition, the network transformer can also increase the transmission distance of the signal between the first connector and the second connector, and can also play a role of electrical isolation, reduce the impact of the external environment on the signal transmitted by the first connector and the second connector, and play a role in protecting the leakage protection device.

[0011] In a specific embodiment, the primary winding has a primary center tap, the secondary winding has a secondary center tap, and two ends of the leakage protection component are respectively connected to the primary center tap and the secondary center tap.

[0012] In a specific embodiment, the leakage protection component is connected between the first connector and the primary winding, and / or the leakage protection component is connected between the second connector and the secondary winding.

[0013] In a specific embodiment, the primary winding has a primary center tap, the secondary winding has a secondary center tap, a first adjustment component is connected between the primary center tap and the ground, and / or a second adjustment component is connected between the secondary center tap and the ground, the first adjustment component and / or the second adjustment component is used to adjust the impedance of the primary winding and the secondary winding, thereby achieving impedance matching of the primary winding and the secondary winding of the network transformer and reducing signal interference.

[0014] In a specific embodiment, the first adjustment component includes at least one capacitor, and / or the second adjustment component includes at least one capacitor. In this embodiment, impedance adjustment is achieved through a ground capacitor. The ground capacitor can provide a stable grounding point for the leakage protection device, thereby ensuring the stability and reliability of the leakage protection device's circuit. At the same time, the ground capacitor can also be used to filter out clutter.

[0015] In a specific embodiment, the leakage protection component includes one of a fuse, a resistor, and a magnetic bead, or the leakage protection component includes two or more of a fuse, a resistor, and a magnetic bead connected in series or in parallel.

[0016] In one specific embodiment, the leakage protection device further includes a circuit board disposed within the housing, and the leakage protection module is integrated into the circuit board. The leakage protection circuit in this embodiment of the present application is integrated onto the circuit board of the leakage protection device, rather than onto the circuit board of the telecommunications network equipment, thus not subject to the space constraints of the circuit board of telecommunications network equipment. Furthermore, the integrated leakage protection device can improve the reliability of the connections between the various components of the leakage protection device.

[0017] In a specific embodiment, the leakage protection device includes a plurality of the first connectors, a plurality of the first connectors, and a plurality of the leakage protection modules.

[0018] An embodiment of the present application further provides a telecommunications network system, comprising:

[0019] telecommunications network equipment;

[0020] A leakage protection device, wherein the leakage protection device is the leakage protection device described above;

[0021] The telecommunication network device is connected to the first connector, and the second connector is used to connect to a terminal device.

[0022] In a specific embodiment, both the first connector and the second connector are network port connectors.

[0023] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of a telecommunications network system in the prior art;

[0025] FIG2 is a schematic structural diagram of a telecommunications network system provided by the present application in a specific embodiment;

[0026] FIG3 is a schematic structural diagram of the leakage protection device in FIG2 in a specific embodiment;

[0027] FIG4 is a schematic diagram of the principle of FIG3;

[0028] FIG5 is a schematic diagram showing the principle of the leakage protection module in FIG4 in a specific embodiment;

[0029] FIG6 is a schematic diagram showing the principle of the leakage protection module in FIG4 in another specific embodiment;

[0030] FIG7 is a schematic diagram showing the principle of the leakage protection module in FIG4 in another specific embodiment;

[0031] FIG8 is a schematic diagram showing the principle of the leakage protection module in FIG4 in another specific embodiment;

[0032] FIG9 is a schematic diagram showing the principle of the leakage protection module in FIG4 in another specific embodiment.

[0033] Description of reference numerals:

[0034] 1′-first terminal device, 2′-second terminal device, 3′-telecommunication network device, 4′-chip;

[0035] 1-Leakage protection device;

[0036] 11- housing;

[0037] 12-first connector;

[0038] 13- second connector;

[0039] 14-leakage protection module;

[0040] 141-Network port transformer;

[0041] 141a-primary winding;

[0042] 141b-secondary winding;

[0043] 142-leakage protection component;

[0044] 15-circuit board;

[0045] 16-first adjustment component;

[0046] 17- second adjustment component;

[0047] 2-First terminal device;

[0048] 3- Second terminal device;

[0049] 4- Telecommunications network equipment;

[0050] 5-Rack.

[0051] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0052] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0053] In a specific embodiment, the present application is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0054] FIG1 is a schematic diagram of a telecommunications network system module. In FIG1 , the telecommunications network system includes a telecommunications network device 3′, a first terminal device 1′, and a second terminal device 2′ connected to a network port of the telecommunications network device 3′. The telecommunications network system also includes a port physical layer (PHY). The Ethernet PHY is a chip responsible for receiving electrical (optical) analog signals, demodulating and converting analog-to-digital signals, and then passing the signals to a memory for processing. The network port (e.g., an RJ45 port) of the telecommunications network device 3′ and the PHY chip can be connected via a network transformer. This network transformer can be used to amplify the signal, extending the transmission distance of the telecommunications network system. Furthermore, the network transformer can isolate the PHY chip from the outside world, improving its anti-interference capabilities and protecting the PHY chip (e.g., from lightning strikes). Furthermore, when the PHY chip is connected to network ports of different voltage levels, it will not affect terminal devices connected to different network ports.

[0055] When leakage current occurs in the first terminal device 1′ due to poor grounding or other reasons, the leakage current enters the network port of the telecommunication network device 3′ connected to the first terminal device 1′ along the network cable. Since the network ports of the telecommunication network device 3′ are usually short-circuited, the leakage current enters the second terminal device 2′ through the network port connected to the second terminal device 2′, forming a first leakage current path (as shown by the dotted line in Figure 1).

[0056] At the same time, when the leakage current exceeds the current capacity of the network transformer windings, the primary and secondary windings of the network transformer will burn out, causing a short circuit, which will direct the leakage current into the PHY chip, forming a secondary leakage current path (as shown by the dotted line in Figure 1). When the leakage current enters the PHY chip, it will damage the PHY chip and the telecommunications network system will not work.

[0057] Currently, to address the issue of excessive leakage current in telecommunications network equipment causing the network transformer windings to burn out and short-circuit, and PHY chips to be damaged, a fuse is typically connected in series between the center tap of the primary winding of the network transformer and the power supply in the telecommunications network equipment. The fuse's current carrying capacity is configured to be smaller than that of the network transformer winding. When the leakage current exceeds the fuse's current carrying capacity, the fuse will blow before the network transformer winding, thereby cutting off the leakage current path and preventing the leakage current from burning the network transformer windings. Furthermore, this prevents the leakage current from being introduced into the PHY chip and causing damage to the chip.

[0058] However, the above solution adds fuses to the circuit board of the telecommunications network equipment. When the network ports of the telecommunications network equipment are densely packed, the space on the circuit board is limited and the fuses cannot be arranged. In addition, the above solution cannot provide leakage protection for telecommunications network equipment that has already been shipped.

[0059] To address this technical problem, embodiments of the present application provide a leakage protection device equipped with a leakage protection circuit that can cut off the leakage current path between telecommunications network equipment and terminal devices, thereby protecting the telecommunications network equipment and reducing the risk of excessive leakage current burning out the windings of the network transformer and causing leakage current to enter the PHY chip. Furthermore, the leakage protection device and the telecommunications network equipment are two relatively independent components. This means that the leakage protection circuit does not need to be installed on the telecommunications network equipment's circuit board, eliminating the problem of placement problems within the telecommunications network equipment and preventing it from affecting the layout of the telecommunications network equipment's circuit boards. Furthermore, this independently installed leakage protection device can also be used with telecommunications network equipment that has already shipped.

[0060] Specifically, FIG2 shows a schematic diagram of the structure of a telecommunications network system in a specific embodiment. The telecommunications network system includes a rack 5 and telecommunications network equipment 4 (e.g., a switch), which is mounted on the rack 5. In this embodiment, a first terminal device 2 and a second terminal device 3 are connected to the telecommunications network system. The first terminal device 2 and telecommunications network equipment 4 are connected via a leakage protection device 1, and the second terminal device 3 and telecommunications network equipment 4 are connected via a leakage protection device 1. When a small leakage current occurs in the first terminal device 2 due to poor grounding or other reasons, the leakage current is transmitted to the leakage protection device 1. When the leakage current is small, it does not cause the leakage protection circuit of the leakage protection device 1 to fuse, and the small leakage current is transmitted to the network port of the telecommunications network equipment 4 connected to the first terminal device 2 (connected via the leakage protection device 1). Due to the short circuit of the network ports of the telecommunications network equipment 4, the leakage current is transmitted to the network port connected to the second terminal device 3, and then transmitted to the second terminal device 3 through the leakage protection device 1 for discharge. The leakage current path of this small leakage current is shown by the dotted line in FIG2. When a large leakage current occurs in the first terminal device 2 due to poor grounding or other reasons, the large leakage current is transmitted to the leakage protection device 1, causing the leakage protection circuit of the leakage protection device 1 to melt, thereby disconnecting the leakage current path and preventing the leakage current from being transmitted to the telecommunications network device 4 through the leakage current path shown in Figure 2, thereby preventing the large leakage current from damaging the PHY chip.

[0061] In a specific embodiment, FIG3 shows a schematic structural diagram of a leakage protection device in a specific embodiment. As shown in FIG3, the leakage protection device 1 includes a housing 11, a first connector 12, and a second connector 13, wherein the first connector 12 and the second connector 13 are arranged on the housing 11, and the first connector 12 and the second connector 13 are used to connect to an external device. In the embodiment shown in FIG2, the first connector 12 and the second connector 13 are used to connect to a terminal device and a telecommunications network device 4, respectively. The first connector 12 and the second connector 13 can be connectors commonly used in the art. For example, when the leakage protection device 1 is used in a telecommunications network system, the first connector 12 and the second connector 13 can be network port connectors. This application does not limit the type and structure of the first connector 12 and the second connector 13.

[0062] As shown in FIG3 , the leakage protection device further includes a leakage protection module 14 , which is connected in series with the first connector 12 and the second connector 13 and is configured to disconnect the circuit of the leakage protection module 14 when the current is greater than a preset current.

[0063] Specifically, FIG4 shows a circuit diagram of a leakage protection module in a specific embodiment. The leakage protection module 14 includes a coupling device, through which the first connector 12 and the second connector 13 are connected. The coupling device is used to enable signal transmission between the first connector 12 and the second connector 13. Therefore, the connection between the coupling device and the first connector 12 and the second connector 13 can be an electrical connection, a signal connection, or a coupling connection, as long as it can achieve signal transmission between the first connector 12 and the second connector 13. In this embodiment, the two ends of the coupling device are respectively connected to the two ends of the leakage protection component 142. The circuit of the leakage protection component 142 is configured to disconnect when the current is greater than a preset current, thereby disconnecting the circuit between the coupling device and the leakage protection component 142, and further disconnecting the signal transmission between the first connector 12 and the second connector 13 connected to the coupling device, thus cutting off the leakage current path of the telecommunications network system shown in FIG2, and preventing large leakage currents from being transmitted to the telecommunications network equipment and causing damage to the PHY chip.

[0064] In this embodiment, the coupling device connecting the first connector 12 and the second connector 13 can be selected according to the application scenario of the leakage protection device.

[0065] In one specific embodiment, a leakage protection module 14 may be provided between the first connector 12 and the second connector 13, thereby simplifying the structure of the leakage protection device. In other embodiments, as shown in FIG3 , the first connector 12 and the second connector 13 may each include multiple network ports. The leakage protection device may include multiple leakage protection modules 14 provided between the first connector 12 and the second connector 13. When leakage current passes through any leakage protection module 14, its leakage protection circuit can be fused, thereby quickly cutting off the leakage current path and protecting the telecommunications network device 4.

[0066] In the embodiment shown in FIG4 , when the telecommunications network system is a gigabit Ethernet port, four sets of leakage protection modules 14 are provided between a pair of first connectors 12 and second connectors 13. Therefore, when the leakage protection device is used in a telecommunications network system, the number of leakage protection modules 14 can be adjusted based on actual needs.

[0067] In a specific embodiment, FIG5 shows a schematic diagram of the structure of the leakage protection module 14 in a specific embodiment. The coupling device in this embodiment can specifically be a network port transformer 141. When the leakage protection device is used in a telecommunications network system, the network port transformer 141 not only enables signal transmission between the first connector 12 and the second connector 13, enabling the telecommunications network system to implement Ethernet signal transmission and Power Over Ethernet (POE). In addition, the network transformer can also increase the transmission distance of the signal between the first connector 12 and the second connector 13, and can also provide electrical isolation, reducing the impact of the external environment on the signals transmitted by the first connector 12 and the second connector 13, and protecting the leakage protection device.

[0068] As shown in Figure 5, the network port transformer 141 includes a primary winding 141a and a secondary winding 141b. When the network port transformer 141 is operating, current flows through the primary winding 141a, generating an induced current in the secondary winding 141b under the action of electromagnetic induction, achieving coupling between the primary winding 141a and the secondary winding 141b. The primary winding 141a is connected to the first connector 12, and the secondary winding 141b is connected to the second connector 13. Therefore, the first connector 12, the network port transformer 141, and the second connector 13 are connected to form a pathway.

[0069] In this embodiment, the leakage protection component 142 is located on the path formed by the first connector 12, the network port transformer 141 and the second connector 13. When the leakage current passing through the leakage protection device is large and exceeds the current carrying capacity of the leakage protection component 142, the leakage protection component 142 melts, thereby disconnecting the leakage protection circuit, cutting off the leakage current path, and preventing the leakage current from being introduced into the telecommunications network equipment 4 through the leakage protection device 1.

[0070] In summary, the leakage protection device 1 of this embodiment, when used in telecommunications network equipment, can protect the telecommunications network equipment 4 by preventing leakage current from entering the PHY chip and causing signal transmission failure. Furthermore, the leakage protection device 1 and the telecommunications network equipment 4 are independent components. Therefore, the leakage protection circuit of the leakage protection device 1 does not occupy space on the circuit board of the telecommunications network equipment 4 and is not affected by the space requirements of the circuit board of the telecommunications network equipment 4. Furthermore, the leakage protection device 1 can ensure Ethernet signal transmission and Power over Ethernet in the telecommunications network system.

[0071] In one specific embodiment, as shown in Figure 5 , primary winding 141a has a primary center tap, and secondary winding 141b has a secondary center tap. The two ends of the leakage protection component 142 are connected to the primary center tap and the secondary center tap, respectively. Thus, leakage protection component 142, the primary center tap, and the secondary center tap form the aforementioned leakage protection circuit. In this embodiment, leakage protection component 142 can interrupt the induced current generated by primary winding 141a in secondary winding 141b, thereby cutting off the leakage current path.

[0072] In another specific embodiment, a leakage protection component 142 is provided between the first connector 12 and the primary winding 141 a , and / or a leakage protection component 142 is provided between the second connector 13 and the secondary winding 141 b .

[0073] In the embodiment shown in Figure 6, when a leakage protection component 142 is provided between the first connector 12 and the primary winding 141a, the first connector 12, the leakage protection component 142 and the primary winding 141a form the leakage protection circuit described above. When the leakage current is greater than the current carrying capacity of the leakage protection component 142, the leakage protection component 142 can cut off the leakage protection circuit, thereby disconnecting the connection between the first connector 12 and the primary winding 141a.

[0074] When a leakage protection component 142 is provided between the second connector 13 and the secondary winding 141b, the secondary winding 141b, the leakage protection component 142 and the second connector 13 form the leakage protection circuit described above. When the leakage current is greater than the current carrying capacity of the leakage protection component 142, the leakage protection component 142 can cut off the leakage protection circuit, thereby disconnecting the connection between the second connector 13 and the secondary winding 141b.

[0075] In the embodiment shown in Figure 7, a leakage protection component 142 is provided between the first connector 12 and the primary winding 141a, and between the primary center tap and the secondary center tap. The leakage protection component 142, the primary center tap, and the secondary center tap form a first leakage protection circuit, while the first connector 12, the leakage protection component 142, and the primary winding 141a form a second leakage protection circuit. The leakage protection device of this embodiment includes two leakage protection circuits. Disconnecting either leakage protection circuit can cut off the leakage current path, further improving the reliability of the leakage protection function of the leakage protection device.

[0076] In the embodiment shown in Figure 8, a leakage protection component 142 is provided between the first connector 12 and the primary winding 141a, between the primary center tap and the secondary center tap, and between the second connector 13 and the secondary winding 141b. The leakage protection component 142, the primary center tap, and the secondary center tap form a first leakage protection circuit. The first connector 12, the leakage protection component 142, and the primary winding 141a form a second leakage protection circuit. The secondary winding 141b, the leakage protection component 142, and the second connector 13 form a third leakage protection circuit. The leakage protection device of this embodiment includes three leakage protection circuits. Disconnecting any leakage protection circuit can cut off the leakage current path, thereby further improving the reliability of the leakage protection function of the leakage protection device.

[0077] In summary, in the embodiment of the present application, the leakage protection component 142 only needs to be arranged on the connection path between the first connector 12 and the second connector 13 and be able to disconnect the leakage current path, and the specific setting position and setting number are not limited.

[0078] In the above embodiments, the leakage protection component 142 includes one of a fuse, a resistor, and a magnetic bead, or the leakage protection component 142 includes two or more of the fuses, resistors, and magnetic beads connected in series or in parallel. This application does not limit the device type and series-parallel relationship of the leakage protection component 142, as long as it can achieve the effect of melting when the current exceeds the preset current.

[0079] In a specific embodiment, as shown in FIG6 , the leakage protection device further includes a first adjustment component 16 and / or a second adjustment component 17. The first adjustment component 16 is connected between the primary center tap of the network transformer and ground, and / or the second adjustment component 17 is connected between the secondary center tap of the network transformer and ground. The first adjustment component 16 is used to adjust the impedance of the primary winding 141a of the network transformer, and / or the second adjustment component 17 is used to adjust the impedance of the secondary winding 141b of the network transformer, thereby achieving impedance matching between the primary winding 141a and the secondary winding 141b of the network transformer and reducing signal interference.

[0080] The first adjustment component 16 may include a capacitor having one end connected to the primary winding 141a and the other end grounded, and / or the second adjustment component 17 may include a capacitor having one end connected to the secondary winding 141b and the other end grounded. Therefore, in this embodiment, impedance adjustment is achieved through a grounded capacitor. The grounded capacitor can provide a stable grounding point for the leakage protection device, thereby ensuring the stability and reliability of the leakage protection device's circuit. Furthermore, the grounded capacitor can be used to filter out clutter.

[0081] Specifically, as shown in FIG6 , the first adjustment component 16 and / or the second adjustment component 17 may include, in addition to the capacitor, one or more of a resistor, a fuse, and a magnetic bead in series or parallel.

[0082] In the embodiment shown in FIG6 , the leakage protection device includes a first adjustment component 16 and a second adjustment component 17 , and both the first adjustment component 16 and the second adjustment component 17 include capacitors.

[0083] In each of the above embodiments, as shown in FIG3 , the leakage protection device 1 further includes a circuit board 15 disposed within the housing 11. The circuit board 15 may be a printed circuit board (PCB), and the leakage protection module 14 is integrated into the circuit board 15. Specifically, the coupling device, leakage protection assembly 142, first adjustment assembly 16, and second adjustment assembly 17 are all integrated into the circuit board 15.

[0084] Therefore, the leakage protection circuit in the embodiment of the present application is integrated on the circuit board 15 of the leakage protection device 1, rather than on the circuit board of the telecommunications network equipment 4, and is not subject to the space constraints of the circuit board of the telecommunications network equipment 4. Furthermore, the integrated leakage protection device can improve the connection reliability between the various components of the leakage protection device 1.

[0085] In addition, as shown in Figure 4, when the leakage protection device 1 is used in a telecommunications network system, the first connector 12 and the second connector 13 are both network port connectors, which can be various network port connectors in the field, and the number of network ports in the network port connector can be set according to actual needs.

[0086] The concept of the present application is as follows: Current telecommunications network equipment generally does not have the ability to protect against network port leakage, or requires the integration of leakage protection circuits on the circuit boards of telecommunications network equipment. Due to the limited space on the circuit boards of telecommunications network equipment, there is a risk that this cannot be arranged. In the embodiment of the present application, by connecting a network port leakage protection device in series between the telecommunications network equipment and the terminal equipment, the telecommunications network system can have a network port leakage protection function without having to replace the existing telecommunications network equipment. At the same time, the leakage protection device does not affect the transmission of Ethernet signals and POE power supply, while also having a network port leakage protection function. When the leakage current is greater than the preset current, the leakage protection module of the network port leakage protection device will be quickly cut off, thereby preventing leakage energy from entering the telecommunications network equipment, thereby solving the problem of equipment damage caused by leakage in the telecommunications network equipment. Furthermore, since the leakage protection circuit is distributed inside the leakage protection device, rather than inside the telecommunications network equipment, the problem of the high-density layout of the electrode plates of the telecommunications network equipment and the inability to set up a leakage protection circuit is avoided.

[0087] It should be noted that the leakage protection device in the above embodiments can be used in telecommunication network systems as well as other systems. The leakage protection device can be used in any field where leakage protection is required. For example, the leakage protection device can be used for leakage protection of electrical equipment.

[0088] The above description is merely a specific implementation of the embodiments of the present application, but the scope of protection of the embodiments of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present application shall be included in the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the embodiments of the present application shall be based on the scope of protection of the claims.

Claims

1. A leakage protection device, characterized in that: The leakage protection device comprises: case; A first connector and a second connector are mounted on the housing, and the first connector and the second connector are respectively used to connect to an external device; Wherein, the leakage protection device also includes a leakage protection module, which is connected in series with the first connector and the second connector. The leakage protection module includes a leakage protection component, and the leakage protection component is configured so that the circuit of the leakage protection component can be disconnected when the current is greater than a preset current.

2. The leakage protection device according to claim 1, characterized in that: The leakage protection module also includes a network port transformer, which has a primary winding and a secondary winding. The first connector is connected to the primary winding, the second connector is connected to the secondary winding, and the leakage protection component is connected to the path of the first connector, the network port transformer and the second connector.

3. The leakage protection device according to claim 2, characterized in that: The primary winding has a primary center tap, the secondary winding has a secondary center tap, and two ends of the leakage protection component are respectively connected to the primary center tap and the secondary center tap.

4. The leakage protection device according to claim 2, characterized in that: The leakage protection component is connected between the first connector and the primary winding, and / or the leakage protection component is connected between the second connector and the secondary winding.

5. The leakage protection device according to claim 2, characterized in that: The primary winding has a primary center tap, the secondary winding has a secondary center tap, a first adjustment component is connected between the primary center tap and ground, and / or a second adjustment component is connected between the secondary center tap and ground, the first adjustment component and / or the second adjustment component are used to adjust the impedance of the primary winding and the secondary winding.

6. The leakage protection device according to claim 5, characterized in that: The first adjustment component at least includes a capacitor, and / or the second adjustment component at least includes a capacitor.

7. The leakage protection device according to any one of claims 1 to 6, characterized in that: The leakage protection component includes one of a fuse, a resistor, and a magnetic bead, or the leakage protection component includes two or more of the fuse, the resistor, and the magnetic bead connected in series or in parallel.

8. The leakage protection device according to any one of claims 1 to 6, characterized in that: The leakage protection device further includes a circuit board arranged on the housing, and the leakage protection module is integrated with the circuit board.

9. The leakage protection device according to any one of claims 1 to 6, characterized in that: The leakage protection device includes a plurality of the first connectors, a plurality of the first connectors, and a plurality of the leakage protection modules.

10. A telecommunication network system, characterized in that: The telecommunication network system comprises: Telecommunications network equipment; A leakage protection device, wherein the leakage protection device is the leakage protection device according to any one of claims 1 to 9; The telecommunication network device is connected to the first connector, and the second connector is used to connect to a terminal device.

11. The telecommunication network system according to claim 10, characterized in that: The first connector and the second connector are both network port connectors.

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