Large-throughput large-current tolerance 1U surge protector

Abstract

The invention relates to a large-throughput and large-current tolerance 1U surge protector, and belongs to the technical field of surge protectors, the large-throughput and large-current tolerance 1U surge protector comprises an inner shell, a piezoresistor, a tripping cut-off assembly and an elastic element, the piezoresistor and the tripping cut-off assembly are respectively located at two opposite sides of the inner shell, and the elastic element is arranged in the inner shell. The piezoresistor is provided with a first electrode slice and a second electrode slice, the first electrode slice is used for being electrically connected with the pin elastic piece A. The tripping cut-off assembly is provided with a tripping electrode slice, the tripping electrode slice is located on the side, close to the plugging end of the surge protector, of the piezoresistor, and the second electrode slice and the tripping electrode slice are welded to form a tripping point. The tripping electrode slice is used for being electrically connected with the pin elastic piece B. A potting heat insulation area is arranged between the piezoresistor and the inner shell, and glue is poured into the potting heat insulation area. The surge protection device has the effect of ensuring safe tripping of the surge protection device under extreme working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surge protectors, in particular to a 1U surge protector with large current tolerance and large current capacity. BACKGROUND

[0002] A surge protector, also known as a lightning protector, is a device used to protect electrical equipment from damage caused by lightning or transient overvoltage fluctuations. The size of a 1U standard cabinet is specified by the American Electronics Association, and a 1U surge protector refers to a surge protection device with a standard rack height of 44.45 mm in unit height.

[0003] In related technologies, a B+C level 1U plug-in frame power surge protector is disclosed in Chinese patent document CN220821453U, which includes four protection modules arranged side by side. Each protection module includes an outer shell, an inner shell, a sliding block, a pin spring A, and a pin spring B. A pressure-sensitive resistor is arranged in the inner shell, and high-temperature electrodes and low-temperature electrodes are arranged on both sides of the pressure-sensitive resistor. The sliding block is provided with a welding piece and a spring A. The high-temperature electrodes are electrically connected to the pin spring A. The low-temperature electrodes are welded to the welding piece to form a trip point. The welding piece is electrically connected to the pin spring B. When tripping occurs, the sliding block is pulled by the spring A, causing the low-temperature electrodes to separate from the welding piece, thereby achieving tripping and power-off.

[0004] Currently, due to the small and tight space in the inner shell, the heat dissipation effect of the pressure-sensitive resistor is poor, and the surface temperature of the surge protector is high. In extreme working conditions, when the power frequency current is greater than 100A, the tripping and breaking capacity of the surge protector is poor, affecting the safety of the product. SUMMARY

[0005] To improve the heat dissipation effect of the pressure-sensitive resistor, reduce the surface temperature of the surge protector, ensure the safe tripping of the surge protector in extreme working conditions, and improve the safety of the product, the present application provides a 1U surge protector with large current tolerance and large current capacity.

[0006] The 1U surge protector with large current tolerance and large current capacity provided by the present application adopts the following technical solution: The utility model provides a kind of 1U surge protector of large traffic flow and large current resistance, including inner shell, pressure sensitive resistance, tripping cutout component and elastic element, the pressure sensitive resistance and tripping cutout component are located at opposite sides of inner shell respectively, the pressure sensitive resistance is provided with first electrode sheet and second electrode sheet, the first electrode sheet is used to be electrically connected with pin spring piece A, the tripping cutout component is provided with tripping electrode sheet, the tripping electrode sheet is located on the side of pressure sensitive resistance close to surge protector plug-in end, the second electrode sheet is welded with tripping electrode sheet, and constitutes tripping point, the tripping electrode sheet is used to be electrically connected with pin spring piece B, the elastic element is arranged between tripping cutout component and inner shell, the elastic element is used to pull tripping cutout component when tripping and drive tripping electrode sheet to move and separate from second electrode sheet, pressure sensitive resistance and inner shell have potting heat insulation zone, and glue is filled in potting heat insulation zone.

[0007] Preferably, the pressure sensitive resistance in the inner shell is provided with two, the second electrode sheet is arranged between the two pressure sensitive resistances, the first electrode sheet is provided with two, the first electrode sheet corresponds to the pressure sensitive resistance one by one, and the two first electrode sheets are located on the sides away from each other of the two pressure sensitive resistances respectively, and the two first electrode sheets are commonly connected with first electrode sheet pin, which is used to be electrically connected with pin spring piece A.

[0008] Preferably, the second electrode sheet is arranged between the two pressure sensitive resistances by face welding, the second electrode sheet is provided with second electrode sheet pin, the second electrode sheet pin is located outside the two pressure sensitive resistances, and the second electrode sheet pin is welded with tripping electrode sheet to constitute tripping point.

[0009] Preferably, the tripping cutout component includes sliding plate slidingly arranged on the side of inner shell away from pressure sensitive resistance, the sliding direction of the sliding plate is parallel to the length direction of inner shell, the tripping electrode sheet is connected with the sliding plate, and the elastic element is arranged between the sliding plate and inner shell to pull the sliding plate when tripping and drive tripping electrode sheet to move and separate from second electrode sheet pin.

[0010] Preferably, when the tripping electrode sheet and second electrode sheet pin are tripped, the distance from the tripping electrode sheet to the second electrode sheet pin is greater than 9 mm.

[0011] Preferably, the height of single-piece surge protector is 40 mm, the thickness of single-piece surge protector is 20 mm, the width of pressure sensitive resistance is 33 mm, the thickness of pressure sensitive resistance is 4.5 mm, the length of pressure sensitive resistance is greater than 46 mm, the width of first electrode sheet pin and second electrode sheet pin is greater than 9 mm, and the welding area between second electrode sheet pin and tripping electrode sheet is greater than 60 mm 2 .

[0012] Preferably, the surge protector further includes a housing, wherein the inner housing, the varistor, and the tripping cutoff assembly are all located inside the housing, and the suspension distance between the tripping electrode and the inner wall of the housing is greater than 2 mm.

[0013] Preferably, the tripping electrode is provided with braided copper wire, which is used for electrical connection with the pin spring B. The braided copper wire is a tightly braided copper wire, and the cross-section of the braided copper wire is greater than 5mm. 2 The braided copper wire has more than 16 turns and the mass of 1m of braided copper wire is greater than 50g.

[0014] Preferably, the braided copper wire is welded to the trip electrode and the pin spring B respectively with a welding flux.

[0015] Preferably, the inner wall of the inner shell near the varistor is provided with multiple heat-dissipating adhesive strips, the varistor is located between the multiple heat-dissipating adhesive strips on the inner wall of the inner shell, and the heat-dissipating adhesive strips are provided with strip-shaped holes for the flow of potting compound.

[0016] In summary, the present invention has the following beneficial technical effects: By adjusting the size of the varistor, a potted thermal insulation zone is formed between the varistor and the inner shell. By potting the thermal insulation zone with adhesive, on the one hand, uniform heat dissipation is ensured around the varistor 2, greatly improving heat dissipation efficiency and effectively extending the thermal breakdown time of the varistor 2. The heat transfer from the varistor 2 to the tripping point is more effective, preventing thermal runaway and ensuring safe tripping before the varistor 2 thermally breaks down and catches fire. Tests show that it can safely trip when the power frequency tripping current is greater than 100A. On the other hand, it ensures that the varistor... 2. The instantaneous heat generated is promptly and evenly released to the surroundings, preventing the tripping point from going out of control due to the instantaneous heat generated on the varistor 2 by the lightning current. Through testing, compared with conventional products under the same conditions, the surge protector of this invention is more stable in the action load test, i.e., in an environment where the lightning impulse is greater than 80kA. Therefore, the surge protector of this invention not only ensures its use in environments with high lightning intensity, high lightning density, and lightning current greater than 80kA, but also ensures safe tripping under extreme conditions where the fault current generated by power frequency overvoltage is greater than 100A, thus improving product safety. Attached Figure Description

[0017] Figure 1 This is an exploded view of the overall structure of Embodiment 1 of the present invention.

[0018] Figure 2 This is a cross-sectional view of the overall structure of the inner shell in Embodiment 1 of the present invention, mainly used to show the positional relationship between the varistor and the inner shell.

[0019] Figure 3This is a partial exploded view of the structure of Embodiment 1 of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure after the tripping point is tripped in Embodiment 1 of the present invention.

[0021] Figure 5 This is a partial structural schematic diagram of Embodiment 2 of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Inner shell; 2. Varistor; 3. First electrode plate; 4. Second electrode plate; 5. Tripping electrode plate; 51. Welding piece; 52. Connecting piece; 6. Encapsulated heat insulation area; 7. First electrode plate pin; 71. First pin portion; 72. Second pin portion; 8. Second electrode plate pin; 81. First connecting portion; 82. Second connecting portion; 83. Third connecting portion; 9. Sliding plate; 10. Outer shell; 11. Braided copper wire; 12. Heat dissipation strip; 13. Strip hole; 14. Varistor mounting cavity; 15. Tripping cut-off assembly mounting groove; 16. Spring. Detailed Implementation

[0023] The following combination Figures 1-5 The present invention will be described in further detail below.

[0024] Example 1: This invention discloses a surge protector with high current and high flow rate, capable of withstanding a 1µF surge. (Refer to...) Figure 1 and Figure 2 The 1U surge protector with high current and high flow rate includes a housing 10, an inner housing 1, a varistor 2, a tripping assembly, and an elastic element. The housing 10 is composed of two housings assembled together, with the inner housing 1 fixedly installed inside the housing 10. A varistor mounting cavity 14 is provided on one side of the inner housing 1, and a tripping assembly mounting slot 15 is provided on the other side. The varistor 2 is installed in the varistor mounting cavity 14, which extends through the inner housing 1 to the side near the surge protector's connector to facilitate the installation of the varistor 2. The connector of the surge protector refers to the end where the spring contacts A and B are located. The tripping assembly is slidably installed in the tripping assembly mounting slot 15, with the sliding direction of the tripping assembly parallel to the length of the inner housing 1. The tripping assembly mounting slot 15 extends through the inner housing 1 to the side away from the varistor 2 to facilitate the installation of the tripping assembly, thus positioning the varistor 2 and the tripping assembly on opposite sides of the inner housing 1.

[0025] Reference Figure 2 and Figure 3The varistor 2 is provided with a first electrode 3 and a second electrode 4. Specifically, the first electrode 3 is a high-temperature electrode and the second electrode 4 is a low-temperature electrode. The first electrode 3 is used to electrically connect with the pin spring A. A tripping electrode 5 is fixedly connected to the side of the tripping cut-off assembly near the surge protector's plug-in end. The tripping electrode 5 is located on the side of the varistor 2 near the surge protector's plug-in end, so that the tripping electrode 5 is located outside the varistor 2. The second electrode 4 is soldered to the tripping electrode 5 to form a tripping point. The tripping electrode 5 is used to electrically connect with the pin spring B. An elastic element is provided between the tripping cut-off assembly and the inner wall of the tripping cut-off assembly mounting groove 15. The elastic element is used to pull the tripping cut-off assembly to move the tripping electrode 5 and separate it from the second electrode 4 when tripping.

[0026] Reference Figure 2 There is a potting and heat insulation zone 6 between the varistor 2 and the inner wall of the varistor mounting cavity 14. The potting and heat insulation zone 6 is filled with glue, specifically, the potting glue in the potting and heat insulation zone 6 is heat-dissipating silicone.

[0027] When the varistor 2 deteriorates or the power frequency fault current continues to occur, the varistor 2 continues to heat up. When the temperature rises to the point that the solder between the second electrode plate 4 and the trip electrode plate 5 is molten, under the traction of the elastic element, the tripping component moves the trip electrode plate 5 toward the direction closer to the surge protector plug-in terminal, so that the trip electrode plate 5 is separated from the second electrode plate 4, thereby realizing tripping and power disconnection. In this invention, by setting the tripping point outside the varistor 2 and adjusting the size of the varistor 2, a potting insulation zone 6 is formed between the varistor 2 and the inner shell 1. By potting adhesive into the potting insulation zone 6 between the varistor 2 and the inner wall of the varistor mounting cavity 14, on the one hand, uniform heat dissipation around the varistor 2 is ensured, greatly improving the heat dissipation effect and effectively extending the thermal breakdown time of the varistor 2. The heat transfer from the varistor 2 to the tripping point is more effective, avoiding thermal runaway and ensuring safe tripping before the varistor 2 thermally breaks down and catches fire. Through testing, it has been shown that safe tripping is possible when the power frequency tripping current is greater than 100A. On the other hand… This invention ensures that during normal lightning current discharge, the instantaneous heat generated by the varistor 2 is promptly and evenly released to the surrounding environment, preventing the tripping point from going out of control due to the instantaneous heat generated by the lightning current on the varistor 2. Through testing, compared to conventional products under the same conditions, the surge protector of this invention is more stable in the operating load test, i.e., in an environment with a lightning impulse greater than 80kA. Furthermore, the surge protector of this invention ensures safe use in environments with high lightning intensity, high lightning density, and lightning currents greater than 80kA, and also ensures safe tripping under extreme conditions of power frequency overvoltage with fault currents greater than 100A, improving product safety. Simultaneously, fixing the varistor 2 with potting compound effectively prevents the solder joints from cracking due to current surges or transportation vibrations.

[0028] Reference Figure 2 and Figure 4 To facilitate the disengagement of the tripping electrode 5 from the second electrode 4 during tripping, the tripping cutoff assembly includes a sliding plate 9. The sliding plate 9 is slidably installed in the installation groove 15 of the tripping cutoff assembly. The sliding direction of the sliding plate 9 is parallel to the length direction of the inner shell 1. The side of the sliding plate 9 near the surge protector plug-in end protrudes from the inner shell 1. The tripping electrode 5 is fixedly connected to the side of the sliding plate 9 near the surge protector plug-in end. An elastic element is disposed between the sliding plate 9 and the inner shell 1 to pull the sliding plate 9 to move the tripping electrode 5 and separate it from the second electrode 4 during tripping. Specifically, the elastic element is the same as in related technologies, using a spring 16 connected between the side of the sliding plate 9 away from the tripping electrode 5 and the side of the inner shell 1 near the tripping electrode 5. When the tripping electrode 5 is welded to the second electrode 4, the spring 16 is in a stretched state, causing the sliding plate 9 to tend to move towards the surge protector plug-in end.

[0029] When the surge protector is operating normally, the second electrode 4 and the trip electrode 5 are soldered together to fix the sliding plate 9 relatively. At this time, the spring 16 is in a stretched state, so that the sliding plate 9 always tends to move towards the surge protector's plug-in end. When the temperature of the second electrode 4 rises to the point that the solder between it and the trip electrode 5 melts, the stretched spring 16 pulls the sliding plate 9, causing the sliding plate 9 to move the trip electrode 5 towards the surge protector's plug-in end, thereby separating the trip electrode 5 from the second electrode 4 and achieving tripping and power disconnection. The tripping is achieved by the sliding plate 9 moving the trip electrode 5 to disengage from the second electrode 4.

[0030] Reference Figure 2 and Figure 3Two varistors 2 are provided in the varistor mounting cavity 14. The two varistors 2 are arranged sequentially along the thickness direction of the surge protector to improve the protection capability of the surge protector. The two varistors 2 share a second electrode plate 4, which is soldered between the two varistors 2. A second electrode plate lead 8 is integrally formed on the side of the second electrode plate 4 near the surge protector's insertion terminal. The second electrode plate lead 8 is located outside the two varistors 2 and is soldered to the trip electrode plate 5 to form a tripping point. Specifically, to facilitate soldering connection with the trip electrode plate 5, the second electrode plate... Pin 8 includes a first connecting part 81, a second connecting part 82, and a third connecting part 83 integrally formed in sequence. The first connecting part 81 is integrally formed on the side of the second electrode plate 4 near the surge protector plug-in terminal. The length direction of the inner shell 1 is parallel to the plane where the first connecting part 81 is located. The plane where the second connecting part 82 is located is perpendicular to the plane where the first connecting part 81 is located. The side of the second connecting part 82 away from the varistor 2 is soldered to the trip electrode plate 5, thereby expanding the soldering station area. The plane where the third connecting part 83 is located is parallel to the plane where the first connecting part 81 is located. The third connecting part 83 is fixedly fastened to the inner shell 1.

[0031] By using two varistors 2 sharing the second electrode plate 4 and employing a surface-to-surface welding process, they are connected in parallel in the circuit to form a common trip point. This increases the current carrying capacity without the need for multiple trip points, helps reduce the introduced impedance of external welding, further reduces the node voltage generated during high current surges, and achieves complete current sharing among the internal varistors 2. This ensures that the B+C level surge protector has no decoupling inductance while meeting the current carrying capacity requirements of Class B and the residual voltage requirements of Class C.

[0032] Reference Figure 2 and Figure 3 Two first electrode plates 3 are provided, and each first electrode plate 3 corresponds one-to-one with a varistor 2. The two first electrode plates 3 are respectively welded to the sides of the two varistor 2 that are far apart from each other. The two first electrode plates 3 are connected to a first electrode plate pin 7, which is located on the side of the first electrode plate 3 near the surge protector's plug-in terminal. The first electrode plate pin 7 is used for electrical connection with the pin spring A. To facilitate the common lead-out of the two first electrode plates 3, the first electrode plate pin 7 includes a first pin portion 71 and a second pin portion 72. The first pin portion 71 is integrally formed with the first electrode plate 3 on the side away from the sliding plate 9, and the second pin portion 72 is integrally formed with the first electrode plate 3 on the side near the sliding plate 9. The first pin portion 71 and the second pin portion 72 are welded together, and the second pin portion 72 is used for electrical connection with the pin spring A.

[0033] Reference Figure 3 and Figure 4When the tripping electrode 5 is tripped from the second connection part 82 of the second electrode pin 8, the distance between the tripping electrode 5 and the second connection part 82 is greater than 9mm to ensure sufficient electrical safety distance and prevent arcing hazards caused by incomplete tripping such as solder melting and wire pulling, adhesion, etc.

[0034] Reference Figure 1 and Figure 2 The suspension distance between the trip electrode 5 and the inner wall of the outer shell 10 is greater than 2mm, so that the trip electrode 5 has gaps with both the inner shell 1 and the outer shell 10, forming a suspended state. This can avoid the influence of electric arc creep during the tripping process, thereby ensuring the safety of the surge protector; at the same time, it is conducive to the heat dissipation of the trip electrode 5.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The single surge protector has a height of 40mm and a thickness of 20mm. Two varistor 2s are connected in parallel. The width of each varistor 2 is 33mm, the thickness is 4.5mm, and the length is greater than 46mm. A 1mm thick potting insulation zone 6 is provided around each varistor 2 for encapsulating thermal silicone for uniform heat dissipation. Increasing the length of the varistor 2 effectively improves its current carrying capacity, given the 20mm thickness of the single surge protector. The width of both the first electrode pin 7 and the second electrode pin 8 is greater than 9mm, and the welding area between the second electrode pin 8 and the tripping electrode 5 is greater than 60mm². 2 It helps to improve the flow of lightning current and meets the requirements for use in environments with high lightning intensity, high lightning density, and lightning current greater than 80kA.

[0036] Reference Figure 1 and Figure 3 The trip electrode 5 is connected to a braided copper wire 11. To facilitate the connection of the braided copper wire 11, the trip electrode 5 includes a welding piece 51 and a connecting piece 52. The welding piece 51 is fixed to the side of the sliding plate 9 near the surge protector's plug-in end, and the plane of the welding piece 51 is parallel to the plane of the second connecting part 82. The welding piece 51 and the second connecting part 82 are soldered together. The connecting piece 52 is fixed to the side of the welding piece 51 away from the varistor 2. The length direction of the inner shell 1 is parallel to the plane of the connecting piece 52. The braided copper wire 11 is fixedly connected to the connecting piece 52. The end of the braided copper wire 11 away from the connecting piece 52 is used for electrical connection with the pin spring B. The braided copper wire 11 is a tightly braided copper wire, and the cross-section of the braided copper wire 11 is greater than 5mm. 2The braided copper wire 11 has more than 16 turns, and the weight of a 1m long braided copper wire 11 is greater than 50g. By using braiding technology to tightly braid the copper wire, the cross-section and density of the braided copper wire 11 are increased, which helps to improve the flow of lightning current and weaken the repulsive force between the copper wires inside the copper wire.

[0037] Reference Figure 2 Furthermore, a welding flux is provided between the braided copper wire 11 and the trip electrode piece and the pin spring piece B, respectively. The welding flux strengthens the connection strength at both ends of the braided copper wire 11, making the welding point of the braided copper wire 11 less likely to fall off due to lightning current impact.

[0038] The implementation principle of Embodiment 1 of the present invention is as follows: When the varistor 2 deteriorates or the power frequency fault current continues to occur, the varistor 2 continues to heat up, causing the temperature of the second electrode plate 4 and the second electrode plate pin 8 to rise; when the temperature rises to the point that the solder joint between the second connection part 82 of the second electrode plate pin 8 and the solder piece 51 of the trip electrode plate 5 is in a molten state, the stretched spring 16 pulls the sliding plate 9 to move the trip electrode plate 5 toward the direction close to the surge protector plug end, so that the solder piece 51 of the trip electrode plate 5 separates from the second connection part 82 of the second electrode plate pin 8, thereby realizing tripping and power disconnection.

[0039] In this invention, by reducing the width of the varistor 2, a potting insulation zone 6 can be formed between the varistor 2 and the inner shell 1 without changing the surge protector thickness of 20mm. By potting adhesive into the potting insulation zone 6 between the varistor 2 and the inner wall of the varistor mounting cavity 14, uniform heat dissipation around the varistor 2 is ensured, greatly improving heat dissipation efficiency and effectively extending the thermal breakdown time of the varistor 2. The heat transfer from the varistor 2 to the tripping point is more effective, preventing thermal runaway and ensuring safe tripping before the varistor 2 thermally breaks down and catches fire. Tests show that safe tripping is achieved when the power frequency tripping current is greater than 100A. On the other hand, it ensures that during normal lightning current release, the instantaneous heat generated by the varistor 2 is promptly and evenly released to the surroundings, preventing the tripping point from going out of control due to the instantaneous heat generated by the lightning current on the varistor 2. Through testing, compared with conventional products under the same conditions, the surge protector of this invention is more stable in the operating load test, i.e., in an environment with a lightning impulse greater than 80kA. Furthermore, the surge protector of this invention not only ensures its use in environments with high lightning intensity, high lightning density, and lightning current greater than 80kA, but also ensures safe tripping under extreme conditions of power frequency overvoltage with a fault current greater than 100A, improving product safety. At the same time, fixing the varistor 2 with potting compound effectively avoids the situation where the solder joints of the surge protector crack due to current surge or transportation vibration.

[0040] This invention effectively increases the surge protection current carrying capacity by increasing the length of the varistor 2, the width of the second electrode pin 8, the width of the first electrode pin 7, and the soldering area at the trip point, enabling the surge protection device of this invention to be used in environments with high thunderstorm intensity, high thunderstorm density, and lightning current greater than 80kA.

[0041] Example 2: Reference Figure 5 The difference between this embodiment and Embodiment 1 is that multiple heat-dissipating adhesive strips 12 are bonded at intervals on each side of the inner wall of the varistor mounting cavity 14 near the varistor 2. The heat-dissipating adhesive strips 12 are heat-dissipating silicone strips, and the length direction of the heat-dissipating adhesive strips 12 is parallel to the length direction of the inner shell 1. The arrangement direction of the multiple heat-dissipating adhesive strips 12 on each side of the inner wall of the varistor mounting cavity 14 is perpendicular to the length direction of the inner shell 1. The varistor 2, the second electrode plate 4, and the first electrode plate 3 are all located between the multiple heat-dissipating adhesive strips 12 in the varistor mounting cavity 14 and abut against the multiple heat-dissipating adhesive strips 12, thereby facilitating the positioning of the varistor 2. The heat-dissipating adhesive strips 12 are provided with strip-shaped holes 13 for the flow of potting compound.

[0042] The implementation principle of Embodiment 2 of the present invention is as follows: the varistor 2 is positioned by multiple heat dissipation strips 12, so that the varistor 2 is not easy to move when the glue is poured between the varistor 2 and the inner wall of the inner shell 1, thus ensuring the glue pouring effect; and the potting glue flows through the strip hole 13, which can fix the heat dissipation strips 12 together, thereby improving the fixing effect of the varistor 2.

[0043] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A surge protector of high current capacity and high current tolerance of 1 U, comprising an inner housing (1), a varistor (2), a tripping cut-off assembly and a resilient element, characterized in that: The pressure sensitive resistor (2) and the tripping cut-off assembly are respectively located on opposite sides of the inner shell (1), the pressure sensitive resistor (2) is provided with a first electrode sheet (3) and a second electrode sheet (4), the first electrode sheet (3) is used for electrically connecting with the pin spring sheet A, the tripping cut-off assembly is provided with a tripping electrode sheet (5), the tripping electrode sheet (5) is located on the side of the pressure sensitive resistor (2) close to the surge protector plug end, the second electrode sheet (4) is welded with the tripping electrode sheet (5) to form a tripping point, the tripping electrode sheet (5) is used for electrically connecting with the pin spring sheet B, the elastic element is arranged between the tripping cut-off assembly and the inner shell (1), and the elastic element is used for pulling the tripping cut-off assembly to drive the tripping electrode sheet (5) to move away from the second electrode sheet (4) during tripping, the pressure sensitive resistor (2) and the inner shell (1) have a pouring heat insulation area (6) therebetween, and the pouring heat insulation area (6) is filled with glue.

2. A high surge protector according to claim 1, characterized in that: The pressure sensitive resistor (2) in the inner shell (1) is provided with two, the second electrode sheet (4) is arranged between the two pressure sensitive resistors (2), the first electrode sheet (3) is provided with two, the first electrode sheet (3) corresponds to the pressure sensitive resistor (2) one by one, the two first electrode sheets (3) are respectively located on the sides away from each other of the two pressure sensitive resistors (2), and the two first electrode sheets (3) are commonly connected with a first electrode sheet pin (7), the first electrode sheet pin (7) is used for electrically connecting with the pin spring sheet A.

3. A high surge protector according to claim 2, wherein: The second electrode sheet (4) is arranged between the two pressure sensitive resistors (2) by face welding, the second electrode sheet (4) is provided with a second electrode sheet pin (8), the second electrode sheet pin (8) is located outside the two pressure sensitive resistors (2), the second electrode sheet pin (8) is welded with the tripping electrode sheet (5) to form a tripping point.

4. A high-throughput high-current surge protector of claim 3, wherein: The tripping cut-off assembly comprises a sliding plate (9) slidingly arranged on the side of the inner shell (1) away from the pressure sensitive resistor (2), the sliding direction of the sliding plate (9) is parallel to the length direction of the inner shell (1), the tripping electrode sheet (5) is connected with the sliding plate (9), and the elastic element is arranged between the sliding plate (9) and the inner shell (1) and used for pulling the sliding plate (9) to drive the tripping electrode sheet (5) to move away from the second electrode sheet pin (8) during tripping.

5. A high-throughput high-current surge protector of claim 3, wherein: When the tripping electrode sheet (5) is tripped away from the second electrode sheet pin (8), the distance from the tripping electrode sheet (5) to the second electrode sheet pin (8) is greater than 9mm.

6. A high-throughput high-current surge protector of claim 3, wherein: The height of the single-chip surge protector is 40 mm, the thickness of the single-chip surge protector is 20 mm, the width of the varistor (2) is 33 mm, the thickness of the varistor (2) is 4.5 mm, the length of the varistor (2) is greater than 46 mm, the width of the first electrode sheet pin (7) and the second electrode sheet pin (8) is greater than 9 mm, and the welding area between the second electrode sheet pin (8) and the tripping electrode sheet (5) is greater than 60 mm 2 .

7. A high surge protector according to claim 1, wherein: The surge protector further comprises an outer shell (10), the inner shell (1), the pressure sensitive resistor (2) and the tripping cut-off assembly are located in the outer shell (10), and the distance from the tripping electrode sheet (5) to the inner wall of the outer shell (10) is greater than 2mm.

8. A high surge protector according to claim 1, wherein: The trip electrode piece (5) is provided with a braided copper wire (11) for electrically connecting with the pin spring B, the braided copper wire (11) is a tight braided copper wire, the cross section of the braided copper wire (11) is greater than 5mm 2 , the number of turns of the braided copper wire (11) is greater than 16, the mass of the braided copper wire (11) 1m wire length is greater than 50g.

9. A high-throughput high-current surge protector of claim 8, wherein: The welding agent is arranged between the welding of the braided copper wire (11) and the tripping electrode sheet (5) and the pin spring sheet B.

10. A high-throughput high-current surge protector of 1U according to any one of claims 1-9, characterized in that: A plurality of heat dissipation adhesive strips (12) are arranged on the inner wall of the inner shell (1) close to the pressure sensitive resistor (2), the pressure sensitive resistor (2) is located between the plurality of heat dissipation adhesive strips (12) of the inner wall of the inner shell (1), and strip-shaped holes (13) for flowing pouring glue are formed in the heat dissipation adhesive strips (12).

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