A double-sided pin type high-voltage photovoltaic fuse

Abstract

The application relates to the field of electrical protection, in particular to a double-sided pin type high-voltage photovoltaic fuse. The fuse comprises a plug and a socket, the plug is used for plugging into the socket for electrical conduction; the plug comprises a first shell, a fuse body assembly, a plug-in part and a cover body, one end of the first shell is provided with a port, the fuse body assembly is accommodated in the first shell, the plug-in part is provided with two parts which are respectively connected to the two sides of the fuse body assembly and are bent and attached to the outer side of the first shell, and the cover body is embedded in the first shell through the port and abuts against the fuse body assembly; the socket comprises a second shell, a lock catch assembly and a clamping piece, the second shell is provided with a plug slot for inserting the plug, and is provided with an accommodation groove for accommodating the lock catch assembly on the two sides of the plug slot, and the clamping piece is provided with two parts which are respectively fixed in the two lock catch assemblies, wherein when the plug is inserted into the socket through the plug slot, the two clamping pieces respectively abut against the plug-in part for electrical conduction.

Description

Technical Field

[0001] This application relates to the field of electrical protection, and in particular to a double-pronged high-voltage photovoltaic fuse. Background Technology

[0002] In the electrical field, with the rapid development of industries such as solar power generation and high-voltage power distribution, the application of high-voltage electrical systems is becoming increasingly widespread. As an important component of clean energy, solar power generation is seeing its high-voltage direct current (HVDC) systems continuously increasing in voltage, and high-voltage power distribution systems are also developing towards higher voltage levels. The stable operation of these high-voltage systems is crucial for the entire energy supply and power distribution system, and fuses, as key components protecting circuit safety, directly affect the reliability and operational efficiency of the system through their performance and ease of installation and maintenance.

[0003] To address the challenges of fuse installation and replacement in solar high-voltage direct current (HVDC) and high-voltage power distribution systems, existing technologies employ various methods. In solar HVDC systems, built-in fuses were commonly used. These were integrated within specific electrical equipment, requiring disassembly of the equipment casing for installation and replacement, a cumbersome process. In high-voltage power distribution systems, some fuses use plug-in type fuses. While relatively convenient, precise alignment is crucial to avoid poor contact. Additionally, some fuses use clip-on type fuses, fixed in the circuit by clips; however, the secure connection is sometimes difficult to guarantee.

[0004] However, these existing technologies have significant drawbacks. Traditional fuses are difficult to install and replace, requiring specialized knowledge and skills that ordinary consumers cannot perform on their own. Furthermore, traditional fuses are inadequate in terms of size and breaking capacity, failing to meet the requirements of high-voltage systems for miniaturization and high breaking capacity. Utility Model Content

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide a double-pronged high-voltage photovoltaic fuse, which allows ordinary consumers to directly replace the fuse by plugging and unplugging, reducing the difficulty and cost of maintenance and improving the ease of use. At the same time, the overall structural design of the fuse can meet the requirements of high-voltage systems for miniaturization and high breaking capacity.

[0006] This application discloses a double-pronged high-voltage photovoltaic fuse, which specifically adopts the following solution: A double-pronged high-voltage photovoltaic fuse includes: a plug and a socket. The plug is used to be inserted into the socket for electrical conduction. The plug includes: a first housing, a fusible element assembly, a plug-in, and a cover. One end of the first housing is provided with a port. The fusible element assembly is housed within the first housing. Two plug-ins are respectively connected to both sides of the fusible element assembly and bent and attached to the outside of the first housing. The cover is embedded in the first housing through the port and abuts against the fusible element assembly. The socket includes: a second housing, a locking assembly, and clips. The second housing is provided with a slot for inserting the plug, and receiving grooves for accommodating the locking assembly are respectively provided on both sides of the slot. Two clips are respectively fixed within the two locking assemblies. When the plug is inserted into the socket through the slot, the two clips abut against the plug-in for electrical conduction.

[0007] By adopting the above technical solution, the plug and socket connection structure design of this double-pronged high-voltage photovoltaic fuse allows ordinary consumers to easily replace fuses in fields such as photovoltaics, wind power, charging piles, and inverters, where frequent starts and large current changes occur, without the need for professional personnel or special tools. This simplifies operation, significantly reduces maintenance costs, and improves ease of use. The fuse element assembly inside the plug is housed within the first housing, the plug is bent and attached to the outside of the first housing, and the cover is embedded with abutting the fuse element assembly, ensuring structural stability and safety. In the socket, the clip is fixed within the locking assembly; when the plug is inserted, the clip abuts against the plug to achieve electrical conduction, effectively ensuring stable circuit connection and normal operation, reducing faults and maintenance needs caused by unstable connections. Furthermore, compared to existing photovoltaic fuses, this fuse has a smaller size, higher rated voltage and breaking force, and can achieve electrical conduction under high-voltage conditions, meeting the requirements of high-voltage power distribution systems.

[0008] Optionally, the melt assembly includes: an overload protection component, one end of which is electrically connected to one of the plug-in components; a melt component, one end of which is electrically connected to the other end of the overload protection component and the other end of which is electrically connected to another plug-in component; an indicator light, one end of which is electrically connected to one of the plug-in components, and a slot is provided on the first housing corresponding to the indicator light for the indicator light to be exposed; and a resistor component, one end of which is electrically connected to the indicator light and the other end of which is electrically connected to another plug-in component.

[0009] By adopting the above technical solutions, one end of the overload protection component is electrically connected to the plug-in, which can cut off the circuit in time when the circuit is overloaded, thus playing the role of overload protection; one end of the fuse is electrically connected to the other end of the overload protection component, and the other end is electrically connected to another plug-in. When a short circuit or other high current occurs in the circuit, the fuse can quickly melt and cut off the circuit, protecting the entire circuit system; one end of the indicator light is electrically connected to the plug-in, and the first housing is provided with a hole slot for the indicator light to be exposed, which can intuitively display the working status of the fuse and facilitate users to understand the circuit status in a timely manner; one end of the resistor is electrically connected to the indicator light, and the other end is electrically connected to another plug-in, which can limit the current of the indicator light and ensure that the indicator light works normally.

[0010] Optionally, the socket further includes: two cover plates, each covering one of the two receiving slots, and a first through hole provided on the cover plate; two insulating pads, each receiving in the first through hole; wherein, the locking assembly includes a locking member and a first screw, one end of the clip is located inside the locking member, one end of the first screw passes through the locking member to fix the clip, and the other end abuts against the insulating pad.

[0011] By adopting the above technical solutions, the safety and stability of the locking assembly are improved. A first through hole is provided on the cover plate to accommodate an insulating pad, preventing the first screw from contacting an external conductor and causing leakage or other safety issues, thus enhancing the insulation performance of the fuse. The locking component of the locking assembly has a fixed clamping piece inside, ensuring the clamping piece's stable position and guaranteeing good electrical conductivity with the plug-in. One end of the first screw passes through the locking component to fix the clamping piece, while the other end abuts against the insulating pad, making the clamping piece more secure. The insulating pad also provides insulation protection, improving the overall performance and safety of the fuse.

[0012] Optionally, the inner side of the first housing is provided with a raised edge, and the outer side of the cover is provided with a snap-fit ​​groove corresponding to the raised edge.

[0013] By adopting the above technical solution, a protruding edge is provided on the inner side of the first housing, and a corresponding snap-fit ​​groove is provided on the outer side of the cover, which enables the cover to be stably connected to the first housing, prevents the cover from easily detaching from the first housing, ensures the stability of the internal structure of the fuse, and thus improves the overall reliability and safety of the fuse.

[0014] Optionally, the plug further includes a blocking element located inside the first housing, and a blocking hole is provided on the cover corresponding to the blocking element, wherein the first housing is filled with arc-extinguishing quartz sand, and the blocking element blocks in the blocking hole to prevent leakage of the arc-extinguishing quartz sand.

[0015] By adopting the above technical solution, after the arc-extinguishing quartz sand is filled into the first housing, the blocking component will be squeezed to block the blocking hole, preventing the arc-extinguishing quartz sand from leaking out of the blocking hole. This ensures the amount of arc-extinguishing quartz sand inside the fuse, improves the arc-extinguishing performance of the fuse, ensures that the arc-extinguishing quartz sand plays a normal arc-extinguishing role in the fuse, and improves the safety and reliability of the fuse.

[0016] Optionally, the second housing is provided with a track groove and an abutment component at one end away from the slot. The abutment component passes through one side of the second housing, and a second through hole is provided on the corresponding side of the second housing. One end of the abutment component extends into the track groove through the second through hole to fix the second housing on the external track.

[0017] By adopting the above technical solution, a track groove is provided at the end of the second housing away from the slot, which can provide a structural basis for cooperation with the external track; an abutment component is provided, and the abutment component passes through one side of the second housing, and one end of the component extends into the track groove through the second through hole on the side of the second housing, which can stably fix the second housing on the external track, realize the reliable installation of the double-pronged high-voltage photovoltaic fuse on the external track, improve the convenience and stability of fuse installation, and reduce the installation difficulty.

[0018] Optionally, the abutting assembly includes: a second screw and a spring member, the spring member being located in the second through hole, one end of the second screw passing through the second through hole from the outside of the second housing and connecting to the spring member, for pushing the spring member to move into the track groove.

[0019] By adopting the above technical solution, the spring component is placed in the second through hole, which allows the spring component to be stably placed within the limitation range of the second through hole; the spring component is connected by the second screw passing through the second through hole from the outside of the second housing, which enables effective control of the spring component; the second screw pushes the spring component to move into the track groove, which can firmly fix the second housing on the external track.

[0020] Optionally, the second housing is provided with through slots on both sides, which pass through the receiving slot and the locking member.

[0021] By adopting the above technical solution, through the through slots of the receiving slot and the locking element on both sides of the second housing, gas can be connected between the receiving slot and the locking element, which facilitates heat dissipation inside the socket and makes it easier to inspect and maintain the clip.

[0022] Optionally, the first housing, the second housing, the cover, and the cover plate are all made of plastic.

[0023] By adopting the above technical solution, the first housing and cover of the plug, and the second housing and cover of the socket are made of plastic material, which can ensure the insulation performance of the double-pronged high-voltage photovoltaic fuse and improve the safety of use.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The plug and socket design of this double-pronged high-voltage photovoltaic fuse allows ordinary consumers to easily replace the fuse without professional personnel or special tools. The operation is simple, greatly reducing maintenance costs and improving ease of use. Moreover, compared with existing photovoltaic fuses, this fuse has a smaller size, higher rated voltage and breaking force, and can achieve electrical conduction in high-voltage environments, meeting the needs of high-voltage power distribution systems.

[0025] 2. The design of housing the fuse assembly inside the plug within the first housing, bending the plug and attaching it to the outside of the first housing, and embedding the cover to abut the fuse assembly ensures the stability and safety of the structure, as well as improves the electrical withstand capability of the fuse. 3. The clip in the socket is fixed inside the locking assembly. When the plug is inserted, the clip abuts against the plug to achieve electrical conduction, which can effectively ensure the stable connection and normal operation of the circuit and reduce the failure and maintenance needs caused by unstable connection.

[0026] 4. A first through hole is provided on the cover plate to accommodate an insulating pad, which can prevent the first screw from contacting an external conductor and causing safety problems such as leakage, thus enhancing the insulation performance of the fuse; 5. The locking component of the locking assembly has a fixed clamping piece inside, which can ensure the stability of the clamping piece and ensure good electrical conduction with the plug-in; one end of the first screw passes through the locking component to fix the clamping piece, and the other end is connected to the insulating pad, which can make the clamping piece more firmly fixed, and the insulating pad can play an insulating protection role, improving the overall performance and safety of the fuse. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a plug insertion socket for a dual-pronged high-voltage photovoltaic fuse disclosed in an embodiment of this application. Figure 2 This is a three-dimensional structural diagram of a dual-pronged high-voltage photovoltaic fuse with a separate plug and socket, as disclosed in an embodiment of this application. Figure 3 for Figure 1 A schematic cross-sectional structure diagram of a double-pin type high-voltage photovoltaic fuse is disclosed. Figure 4 for Figure 1 A schematic diagram of the internal structure of a double-pronged high-voltage photovoltaic fuse when the plug and socket are connected; Figure 5 for Figure 2 A schematic diagram of the exploded structure of a socket for a double-pronged high-voltage photovoltaic fuse; Figure 6 for Figure 2 A schematic diagram of the exploded plug structure of a double-pin high-voltage photovoltaic fuse is disclosed. Figure 7 This is a three-dimensional structural diagram of the plug insertion socket of a double-pronged high-voltage photovoltaic fuse disclosed in this application embodiment, from another angle.

[0028] Explanation of reference numerals in the attached figures: 10. Plug; 11. First housing; 111. Port; 112. Groove; 113. Lug; 12. Fusible element assembly; 121. Overload protection element; 122. Fusible element; 123. Indicator light; 124. Resistor; 13. Insert; 14. Cover; 141. Snap-in groove; 142. Blocking hole; 15. Blocking element; 20. Socket; 21. Second housing; 211. Slot; 212. Receiving groove; 213. Second through hole; 214. Through groove; 22. Locking assembly; 221. Locking element; 222. First screw; 23. Clip element; 24. Cover plate; 241. First through hole; 25. Insulating pad; 26. Track groove; 27. Abutment assembly; 271. Second screw; 272. Spring element. Detailed Implementation

[0029] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0030] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0031] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0032] See Figure 1 and Figure 2The present application discloses a double-pronged high-voltage photovoltaic fuse, including a plug 10 and a socket 20. The plug 10 is used to plug into the socket 20 to conduct electricity. This plug-in connection method can facilitate the installation and removal of the fuse, greatly improving the convenience of operation and reducing the reliance on professional personnel and special tools.

[0033] For details, see Figure 3 and Figure 4 The plug 10 includes a first housing 11, a molten metal assembly 12, a plug 13, and a cover 14. One end of the first housing 11 is provided with a port 111 to form a container-like structure with a certain space. The first housing 11 is made of plastic material, which has good insulation performance and a certain strength, and can protect the internal molten metal assembly 12 and other components.

[0034] The fuse assembly 12 is housed within the first housing 11 and is the core component of the fuse for overload protection and other functions. The fuse assembly 12 includes an overload protector 121, a fuse element 122, an indicator light 123, and a resistor 124. One end of the overload protector 121 is electrically connected to a plug-in 13 on one side, and the other end is electrically connected to the fuse element 122, for example, by welding. The overload protector 121 is designed to ensure the product meets UL electrical performance standards and can guarantee that all fuse ratios can be broken normally. The fuse element 122 is made of a low-melting-point alloy material such as copper or silver. The ends of the overload protector 121 and the fuse element 122 that are far apart from each other are electrically connected to two plug-ins 13, for example, by welding, to enable current conduction.

[0035] When current enters the fuse through plug 13, it first passes through fuse assembly 12. If the current is normal, fuse assembly 12 remains conductive. In case of overload or short circuit, overload protection device 121 or fuse assembly 122 will activate accordingly, cutting off the circuit and protecting the motor. With its pluggable design, fuse assembly 12 can be directly replaced by unplugging plug 10 after damage.

[0036] In addition, in order to enable users to intuitively understand the working status of the fuse, the fuse assembly also includes an indicator light 123 and a resistor 124. The indicator light 123 is electrically connected to the resistor 124, and the ends of the two that are far apart from each other are respectively connected to two plugs 13. Correspondingly, a slot 112 adapted to the indicator light 123 is provided on the first housing 11 so that the indicator light 123 can be exposed.

[0037] The indicator light 123 is a light-emitting diode used to display the working status of the fuse. The corresponding resistor 124 has a relatively high resistance, which can limit the current passing through the indicator light 123 and prevent the indicator light 123 from being damaged due to excessive current. When the fuse is working normally, the current will preferentially conduct through the fuse assembly 12. When the current is too large and causes the fuse element 122 in the fuse assembly 12 to melt, the current will flow through the resistor 124 and the indicator light 123, causing the indicator light 123 to light up, indicating that the fuse element 122 has melted, thereby reminding the user to replace the plug 10 in time.

[0038] The plug-in 13 is configured as two symmetrical ones, which are respectively connected to both sides of the melt assembly 12 and bent and attached to the outside of the first housing 11 (see its structure). Figure 4 The plug-in 13 is made of a metal sheet with good conductivity, such as a copper sheet. Its shape is bent, with one end located inside the first housing 11 and the other end attached to the outside of the first housing 11. This allows it to better contact the clip 23 in the socket 20, achieve electrical conduction, and improve the withstand voltage of the fuse.

[0039] See Figure 3 and Figure 5 The cover 14 is made of plastic and is embedded in the first housing 11 through the port 111 to abut against the molten component 12. The inner side of the first housing 11 is provided with a protruding edge 113, and the outer side of the cover 14 is provided with a snap-fit ​​groove 141 corresponding to the protruding edge 113. In this way, through the cooperation of the protruding edge 113 and the snap-fit ​​groove 141, the cover 14 can be firmly fixed in the first housing 11 to prevent the molten component 12 from loosening.

[0040] See Figure 6 The plug 10 also includes a blocking member 15 located inside the first housing 11. A blocking hole 142 is provided on the cover 14 corresponding to the blocking member 15. The first housing 11 is filled with arc-extinguishing quartz sand, and the blocking member 15 blocks the blocking hole 142 to prevent the arc-extinguishing quartz sand from leaking.

[0041] The blocking element 15 can be made of elastic materials such as rubber, and can tightly plug the blocking hole 142. The combination logic of the blocking element 15 and the blocking hole 142 is as follows: when the first housing 11 is filled with arc-extinguishing quartz sand, it will compress the blocking element 15 to block the blocking hole 142, preventing the arc-extinguishing quartz sand from leaking out of the blocking hole 142. This can ensure the amount of arc-extinguishing quartz sand inside the fuse and improve the arc-extinguishing performance of the fuse.

[0042] For details, see Figure 5The socket 20 includes a second housing 21, a locking assembly 22, and a clip 23. The second housing 21 is provided with a slot 211 for inserting a plug 10, and receiving grooves 212 for accommodating the locking assembly 22 are provided on both sides of the slot 211. It is constructed as a structure with a slot 211 and receiving grooves 212, which facilitates the insertion of the plug 10 and the installation of the locking assembly 22.

[0043] The second housing 21 is made of plastic and is a one-piece structure. The locking assembly 22 includes a locking member 221 and a first screw 222. One end of the clamping piece 23 is located inside the locking member 221, and its structure is described in [reference needed]. Figure 5 One end of the first screw 222 passes through the locking member 221 to fix the clamping member 23, and the other end of the first screw 222 abuts against the insulating pad 25. The first screw 222 and the clamping member 23 are fixed by abutting, for example, or the clamping member 23 is welded to the first screw 222.

[0044] The locking element 221 is made of metal and has a certain strength. Together with the first screw 222, it can firmly fix the clamping piece 23. In addition, the first screw 222 can adjust the position of the clamping piece 23 within the locking element 221 by rotating its height relative to the locking element 221. It can also be used for clamping pieces 23 of different thicknesses, thereby adjusting the contact area between the clamping piece 23 and the plug-in 13.

[0045] Two clips 23 are provided corresponding to the locking assemblies 22, and are respectively fixed in the two locking assemblies 22. The clips 23 are made of a metal with good electrical conductivity, such as copper, and their shape design can be as follows: Figure 3 As shown, it can make tight contact with the plug 13 to achieve good electrical conduction. Specifically, when the plug 10 is inserted into the socket 20 through the slot 211, the two clips 23 respectively abut against the two plugs 13 to achieve electrical conduction.

[0046] Further, see Figure 3 and Figure 5 The socket 20 also includes a cover plate 24 and an insulating pad 25. There are two cover plates 24, which are respectively covered on two receiving grooves 212, and a first through hole 241 is provided on the cover plate 24 for receiving the insulating pad 25.

[0047] The cover plate 24 is made of plastic and serves to protect the locking assembly 22. Two insulating pads 25 are provided, each housed in one of the two first through holes 241. The insulating pads 25 are made of insulating materials such as rubber or silicone and can prevent the first screw 222 from conducting electricity, ensuring safe use.

[0048] Furthermore, to facilitate the fixing of the second housing 21, and thus the installation of the fuse, see [reference needed]. Figure 3 , Figure 5 and Figure 7 A track groove 26 and an abutment component 27 are provided at the end of the second housing 21 away from the slot 211. The abutment component 27 passes through one side of the second housing 21, and a second through hole 213 is provided on the corresponding side of the second housing 21. One end of the abutment component 27 extends into the track groove 26 through the second through hole 213 to fix the second housing 21 on the external track.

[0049] The abutment assembly 27 includes a second screw 271 and a spring member 272. The spring member 272 is located in the second through hole 213. One end of the second screw 271 passes through the second through hole 213 from the outside of the second housing 21 and connects to the spring member 272, thereby pushing the spring member 272 to move into the track groove 26. In this way, the abutment assembly 27 allows the socket 20 to be easily installed on an external track, and its abutment firmness can be adjusted as needed.

[0050] Additionally, see Figure 7 On both sides of the second housing 21, there are through grooves 214 for the through receiving groove 212 and the locking member 221, respectively. The through grooves 214 facilitate heat dissipation inside the second housing 21 and facilitate inspection and maintenance of the clamping member 23.

[0051] It is worth mentioning that, based on the above structural design, this double-pronged high-voltage photovoltaic fuse has a higher rated voltage and breaking capacity compared to existing technologies. For example, the existing 1500VDC 30A 10*85mm photovoltaic fuse has a breaking capacity of only 10KA. By replacing it with this double-pronged high-voltage photovoltaic fuse of the same size, the rated voltage can be increased to 2000VDC and the breaking capacity can be increased to 50KA, thus meeting the requirements of high-voltage systems for miniaturization and high breaking capacity.

[0052] The implementation principle of this embodiment is as follows: The plug-and-play design of the plug 10 and socket 20 allows ordinary consumers to easily replace the fuse without specialized tools or expertise. The overload protection component 121 and the fuse element 122 in the fuse assembly 12 can melt in time during circuit overload or short circuit, protecting the safety of electrical equipment. The locking assembly 22 and clip 23 of the socket 20 ensure good contact with the plug 13 of the plug 10, achieving stable electrical conduction; simultaneously, the location of the plug 13 on both sides of the plug 10 improves the overall electrical withstand capability, thereby increasing the breaking capacity of the fuse. The indicator light 123 allows users to intuitively understand the working status of the fuse. The abutment component 27 allows the socket 20 to be easily installed on an external rail, improving installation flexibility.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-pronged high-voltage photovoltaic fuse, characterized in that, include: A plug (10) and a socket (20), wherein the plug (10) is used to be inserted into the socket (20) for electrical conduction; The plug (10) includes: a first housing (11), a molten metal assembly (12), a plug (13), and a cover (14). One end of the first housing (11) is provided with a port (111). The molten metal assembly (12) is housed in the first housing (11). Two plugs (13) are provided, which are respectively connected to the two sides of the molten metal assembly (12) and bent and attached to the outside of the first housing (11). The cover (14) is embedded in the first housing (11) through the port (111) and abuts against the molten metal assembly (12). The socket (20) includes: a second housing (21), a locking assembly (22), and a clip (23). The second housing (21) is provided with a slot (211) for inserting the plug (10), and receiving grooves (212) for accommodating the locking assembly (22) are provided on both sides of the slot (211). The clip (23) is provided in two parts and is fixed in the two locking assemblies (22). When the plug (10) is inserted into the socket (20) through the slot (211), the two clips (23) abut against the plug (13) to conduct electricity.

2. The double-pronged high-voltage photovoltaic fuse according to claim 1, characterized in that, The melt assembly (12) includes: Overload protection device (121), one end of which is electrically connected to a plug-in (13); The melt component (122) is electrically connected at one end to the other end of the overload protection component (121) and at the other end to another plug-in (13); An indicator light (123) is electrically connected to a plug-in (13) at one end. A slot (112) is provided on the first housing (11) corresponding to the indicator light (123) for the indicator light (123) to be exposed. The resistor (124) is electrically connected at one end to the indicator light (123) and at the other end to another plug-in (13).

3. The double-pronged high-voltage photovoltaic fuse according to claim 1, characterized in that, The socket (20) also includes: Two cover plates (24) are provided, which are respectively covered on the two receiving grooves (212), and a first through hole (241) is provided on the cover plate (24). Two insulating pads (25) are provided, each housed in the first through hole (241); The locking assembly (22) includes a locking member (221) and a first screw (222). One end of the clamping piece (23) is located inside the locking member (221). One end of the first screw (222) passes through the locking member (221) to fix the clamping piece (23), and the other end abuts against the insulating pad (25).

4. The double-pronged high-voltage photovoltaic fuse according to claim 1, characterized in that, The inner side of the first housing (11) is provided with a protruding edge (113), and the outer side of the cover (14) is provided with a snap-fit ​​groove (141) corresponding to the protruding edge (113).

5. The double-pronged high-voltage photovoltaic fuse according to claim 1, characterized in that, The plug (10) further includes a blocking element (15) located inside the first housing (11). A blocking hole (142) is provided on the cover (14) corresponding to the blocking element (15). The first housing (11) is filled with arc-extinguishing quartz sand, and the blocking element (15) blocks the blocking hole (142) to prevent the arc-extinguishing quartz sand from leaking.

6. The double-pronged high-voltage photovoltaic fuse according to claim 1, characterized in that, The second housing (21) is provided with a track groove (26) and an abutment component (27) at one end away from the slot (211). The abutment component (27) is inserted through one side of the second housing (21), and a second through hole (213) is provided on the corresponding side of the second housing (21). One end of the abutment component (27) extends into the track groove (26) through the second through hole (213) to fix the second housing (21) on the external track.

7. The double-pronged high-voltage photovoltaic fuse according to claim 6, characterized in that, The abutment assembly (27) includes a second screw (271) and a spring (272), the spring (272) being located in the second through hole (213), one end of the second screw (271) being inserted from the outside of the second housing (21) into the second through hole (213) to connect the spring (272) and to push the spring (272) into the track groove (26).

8. The double-pronged high-voltage photovoltaic fuse according to claim 3, characterized in that, The second housing (21) has through slots (214) on both sides that pass through the receiving slot (212) and the locking member (221).

9. The double-pronged high-voltage photovoltaic fuse according to claim 3, characterized in that, The first housing (11), the second housing (21), the cover (14) and the cover plate (24) are all made of plastic.

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