309results about "Resistor housing/enclosing/embedding" patented technology

The invention discloses an electric lightning arrester insulation shield capable of being installed without power outage and an installation method, and relates to the technical field of electric protection, the electric lightning arrester insulation shield comprises an insulation cover, an elastic automatic locking mechanism, an installation sheet and a reinforcing plate, the insulation cover is integrally formed, a turnover plate is connected to the lower ends of a left side plate and a right side plate, and the elastic automatic locking mechanism comprises a left locking module and a right locking module; the modules are connected through a pressure piece and a clamping piece through a connecting piece, a lock body part penetrates through a locking hole to achieve locking, during installation, the protective cover is driven by an insulating rod to be horizontally pushed into the top of the lightning arrester, a locking mechanism is extruded and triggered to achieve automatic locking, the protective cover is fixed to an exposed metal piece, and main insulation is not affected. Locking is reliable, the service life is long, operation is convenient, the device can be expanded to multiple fields, and safe operation of equipment is guaranteed.

The utility model provides a lightning impulse protection device for a transformer, and relates to the technical field of lightning arresters, the lightning impulse protection device for the transformer comprises a mounting plate, two ends of the mounting plate are respectively provided with a protection mechanism, the protection mechanism comprises two rectangular blocks, the inner walls of the two rectangular blocks are rotatably connected with a rotating shaft, and the rotating shaft is connected with the mounting plate. A rotating shaft is arranged on the outer side of the screw rod, a coil spring is arranged on one side of the rotating shaft, an L-shaped rod is fixedly connected to the outer surface of the rotating shaft, and a piston block is rotationally connected to one end of the screw rod. The piston block slides on the inner wall of the rectangular groove by rotating the screw rod, so that the airbag sheet deforms and expands outwards, the outer side of the joint of the lightning arrester body and the high-voltage line is wrapped and protected, the influence of rain and sun on the outer side of the joint of the high-voltage line and the lightning arrester body is reduced as much as possible, the service life of the lightning arrester body is prolonged, and the use effect of the lightning arrester body is improved.

The invention discloses an aluminum shell heat dissipation and heating tube resistor integrated structure which comprises a heat dissipation aluminum shell, a plurality of installation cavities are formed in the heat dissipation aluminum shell, heating assemblies are installed in the installation cavities, lead terminals are installed on the heating assemblies, a closed cooling cavity is formed in the heat dissipation aluminum shell, and a resistor is arranged in the closed cooling cavity. According to the aluminum shell heat dissipation and heating tube resistor integrated structure, through the integrated fusion design of the aluminum shell and the heating tube resistor and the combination of the phase change material cooling technology, the heat dissipation bottleneck problem of a high-power resistor is solved, and the aluminum shell heat dissipation and heating tube resistor integrated structure is compact in structure and efficient in heat dissipation; the resistor is particularly suitable for high-end industrial application such as robots and new energy equipment, and is expected to replace a traditional aluminum shell resistor and an independent cooling system, the reliability of equipment is enhanced, and meanwhile, the equipment cost and maintenance requirements are reduced.

The utility model relates to an air duct structure of a forced air cooling brake resistor. The air duct structure is arranged on a resistor box body, the resistor box body comprises a box body air duct and a resistor element arranged in the box body air duct, and the air duct structure comprises a conical air guide device, a fan, an air inlet mesh enclosure and an air outlet shell arranged at the outlet end of the box body air duct which are sequentially connected with the inlet end of the box body air duct; the air inlet mesh enclosure is a cuboid mesh enclosure, a fan receding hole is formed in one side of the air inlet mesh enclosure, and fan blades of the fan are rotationally arranged at the fan receding hole. Compared with the prior art, the air duct structure enables air flow to be evenly distributed in the air duct of the box body, prevents the air flow from generating a blind area in the air duct and causing local over-temperature of a brake resistor, can effectively reduce the adverse effect of walking wind generated when a train travels on heat dissipation of the resistor, and improves heat dissipation efficiency.

The utility model relates to a high-power box-type liquid-cooled brake resistor, the resistor takes away heat through cooling liquid, the resistor comprises a shell, a resistor unit and a mounting plate, the mounting plate is mounted in the shell, the resistor unit is mounted on the mounting plate, the resistor further comprises a water inlet, a water outlet, a water passing plate and a water channel, the water inlet and the water outlet are installed on the shell, the water passing plate and the water channel are installed inside the shell, the water channel is connected with the water passing plate, one end of the resistor unit is placed in the water channel, and the cooling liquid sequentially passes through the water inlet, the water passing plate, the water channel and the water outlet. According to the utility model, the water channel is arranged, the integrated flow guide (anti-backflow design) design is adopted in the shell, the cooling liquid passes through the tubular resistor from bottom to top, and the temperature controller and the pressure monitoring instrument are arranged, so that the heat dissipation function is exerted to the utmost extent; by arranging the reinforcing ribs, the pressure bearing capacity of the shell can be enhanced, and the deformation amount of the shell in the working pressure bearing process is reduced.

A system includes an inverter configured to convert DC power from a battery to AC power to drive a motor, wherein the inverter includes: a power module, the power module including a thermistor assembly, the thermistor assembly including: a conductive layer including a trench; a thermistor connected to the conductive layer and disposed across the trench; and a first height control feature between the conductive layer and the thermistor.

The utility model discloses a modularized load, which comprises a box body, two longitudinal ends of the box body are provided with openings, one opening of the box body is fixedly connected with a fan, a plurality of resistor units are sequentially arranged in the box body along the longitudinal direction, and each resistor unit comprises a frame body and a resistance tape wound in the frame body in a snake shape. Air blown out by the fan blows through the frame body, the frame body is detachably connected with the box body, and two wiring terminals are fixedly arranged on the frame body. According to the requirement of a load, the resistor units with corresponding resistance values are inserted into the box body from the jacks at the top of the box body, and the resistor units can be connected in series or in parallel so as to obtain the required resistance value. Therefore, when the resistance value required by the load is changed, the whole modularized load does not need to be replaced, and only the corresponding resistor unit needs to be replaced or the wiring mode of the resistor unit needs to be changed, so that the manpower can be saved, the working efficiency is improved, the equipment investment can be saved, and the aim of reducing the cost is fulfilled.

The present application relates to the technical field of high-power resistor, conductive connection, electrothermal technology, and provides a production method of a high-power resistor with separated resistor sheets and the high-power resistor. The method comprises: processing a metal material through a laser device to make a resistor shell with convection heat dissipation holes; processing a plurality of cuboid-shaped resistor sheets, each resistor sheet being provided with an insulating support at an end portion and being capable of being connected in series and parallel according to resistance requirements as an independent resistance unit; and installing the resistor sheets into the shell at intervals to form a convection space of a preset height between adjacent resistor sheets, which is communicated with an external environment through the convection heat dissipation holes. The method of the present application obtains a high-power resistor composed of independent resistance units through a separated design and convection heat dissipation, effectively reduces the thermal load and energy consumption of the high-power resistor, and prolongs the service life.

The application provides a double-row lead frame resistance. The double-row lead frame resistance comprises a lead frame, a resistance, and the two ends of the first coil and the second coil are respectively installed with the lead wires; a protective cover; a cooling mechanism, the inside of the protective cover is fixedly connected with the supporting rod, the bottom end of the supporting rod is installed with the air bag; the top end of the supporting rod is internally installed with the fixed block and the fixed frame, the inside of the fixed block is slidably connected with the piston, the inside of the piston and the fixed block is respectively installed with the magnetic ring, the magnetic rings are attracted to each other; the inside of the fixed frame is slidably connected with the sliding rod, the sliding rod is fixedly connected with the piston, the side wall of the sliding rod is sleeved with the spring, and the two ends of the spring are respectively connected with the fixed frame and the piston; a cooling mechanism; a connecting mechanism. The double-row lead frame resistance provided by the application has the advantages of eliminating the self-induction of the coil, reducing the eddy current, and facilitating the dissipation of the heat inside the coil.

The present invention relates to a sensor comprising a ceramic substrate (1) and two metallization layers (2) applied on opposite surfaces of the ceramic substrate (1), each having an adhesion layer (2A) applied directly onto the ceramic substrate (1) and a gold layer (2B) applied on each adhesion layer (2A). Furthermore, the present invention relates to a method for manufacturing the sensor.

The utility model relates to a porcelain jacket lightning arrester, and relates to the technical field of lightning arresters, the porcelain jacket lightning arrester comprises a porcelain shell and a core body located in the porcelain shell, the outer circumferences of the two ends of the porcelain shell are fixedly sleeved with an upper flange and a lower flange respectively, the upper flange is fixedly provided with an upper pressing plate used for fixing one end of the core body, and the lower flange is fixedly provided with a lower pressing plate used for fixing the other end of the core body. A lower pressing plate for fixing the other end of the core body is fixedly arranged on the lower flange; an anti-explosion plate is fixedly arranged on the end face, away from the porcelain shell, of the upper pressing plate, a scribing groove is formed in the end face, facing a cavity opening of the porcelain shell, of the anti-explosion plate, a through hole is formed in the upper pressing plate, and closed gas in the porcelain shell can directly penetrate through the through hole to impact the scribing groove; according to the lightning arrester, when a short-circuit fault occurs in the operation process of the lightning arrester, the closed gas in the ceramic shell is sharply expanded, and the expanded gas applies pressure to the explosion-proof plate, so that the explosion-proof plate is torn at the scribed line groove, the internal pressure is released in time from the torn part, the possibility of comminuted explosion is reduced, and the service life of the lightning arrester is prolonged. And the safety performance of the lightning arrester in application is improved.

The present invention relates to a resistance unit, a resistance assembly, and a battery pack, and more particularly, to a connectable and separable resistance unit, a resistance assembly connected with a plurality of resistance units, and a battery pack mounted with the resistance assembly. A resistance unit according to one embodiment of the present invention comprises: a first resistance portion formed to extend in a first direction; a second resistance portion formed to extend in a second direction; a housing for accommodating the first resistive portion and the second resistive portion therein; and a terminal portion coupled with one or more of one end of the first resistance portion and one end of the second resistance portion and having a portion protruding out of the housing, in which an opening is formed through a portion of the housing facing the other end of the first resistance portion and a portion of the housing facing the other end of the second resistance portion, and the plurality of resistor units can be connected and separated in the first direction and the second direction, so that resistors of various specifications can be provided without being limited by the installation space of the resistors.

The application provides an intelligent packaging equipment for a pressure-sensitive resistor, a packaging process and the pressure-sensitive resistor. The intelligent packaging equipment for the pressure-sensitive resistor comprises a man-machine interface, a plurality of clamps and, sequentially arranged along the transmission direction of the clamps, a feeding rack, an oven, a packaging device and a discharging rack. The feeding rack, the oven and the discharging rack accommodate the clamps in a layered manner. The oven is provided with a constant temperature device for constant temperature adjustment of the pressure-sensitive resistor on the clamp. The packaging device comprises a packaging mechanical arm, a heat preservation box, a heating assembly and a powder tank assembly. The powder tank assembly is filled with packaging powder. The heating assembly comprises a heating door, a leveling rack and a sliding seat. The leveling rack is provided with a scraper extending into the powder tank assembly. The heat preservation box, the heating assembly and the powder tank assembly are sequentially distributed from top to bottom to make the packaging process of the pressure-sensitive resistor continuous and orderly, improve the packaging efficiency and the packaging yield, and reduce the volume of the packaging equipment and improve the space utilization.

The utility model provides a chip resistor. The chip resistor comprises a substrate, a back electrode, a front electrode, a resistive layer, a protective layer and a side electrode, the protective layer comprises a first protective layer and a second protective layer; the first protective layer is made of a glass material, and the second protective layer is made of at least two layers of epoxy resin materials; a third protective layer is formed on the left electrode and the right electrode which are not covered, and the third protective layer is made of a resin silver material; through a multi-layer protection structure formed by the first protection layer made of the glass material and the second protection layer made of the epoxy resin material, invasion of moisture, chemical corrosion and mechanical damage is effectively prevented, the service life of the resistor in a severe environment is remarkably prolonged, and particularly, through the third protection layer made of the resin silver material, the service life of the resistor is prolonged. The anti-corrosion performance of the electrode part is enhanced, so that the resistor can keep stable electrical performance during long-time work.

The invention relates to a composite jacket gapless metal oxide lightning arrester, which comprises an umbrella skirt protection cover and a gapless lightning arrester body, the gapless lightning arrester body is movably arranged in the umbrella skirt protection cover, the center of the gapless lightning arrester body is provided with an axial through central hole channel, a working medium pipe is arranged in the central hole channel in a penetrating manner, and the working medium pipe is connected with the umbrella skirt protection cover. The working medium pipe comprises an evaporation section positioned at the bottom and a condensation section positioned at the top, and the end part of the condensation section extends to a top cavity above the gapless lightning arrester body; a capillary pipeline is attached to the inner wall of a pipe cavity of the working medium pipe, and a low-boiling-point working medium is contained in the capillary pipeline. And the outer wall of the condensation section at the top of the working medium pipe is also provided with a heat guide assembly, so that the interior of the umbrella skirt protection cover can be cooled, and the normal work of the gapless lightning arrester body is effectively ensured.

The invention discloses a lightning arrester with high protection performance, and particularly relates to the technical field of lightning arresters, the lightning arrester comprises a lightning arrester body, a rotating shell is arranged outside the lightning arrester body, an insulating pipe sleeve fixedly sleeves the exterior of a wiring end of the lightning arrester body, a rotating table is arranged on the bottom surface of the lightning arrester body, and the rotating table is fixedly connected with the rotating shell. Two rain baffles are fixedly mounted on the inner circular wall surface of the rotating shell; the protection assembly is arranged in the rotating shell and used for guaranteeing the protection effect of the lightning arrester body, the protection assembly comprises two connecting frames, the two connecting frames are both arranged in the rotating shell, flexible brushes are arranged outside the connecting frames, and the flexible brushes are arranged in the rotating shell. The flexible brush is attached to the curved surface of the lightning arrester body under the preset contact pressure, closed-loop spiral track motion is formed under driving of the connecting frame, automatic operation without a power source is achieved through a high-altitude continuous wind field, and therefore pollutants such as dust, salt crystals and bird droppings attached to the lightning arrester body can be conveniently stripped off.

The dustproof heat dissipation resistor cabinet comprises a cabinet main body, an inner cavity is formed in the front face of the cabinet main body, cabinet doors are connected to the two sides of the opening face of the front face of the cabinet main body through hinges, through grooves are formed in the two sides of the cabinet main body, fixing blocks are fixedly connected to the inner surfaces of the through grooves, and side heat dissipation mechanisms are arranged at the positions of the fixing blocks; the top of the inner cavity of the cabinet main body is fixedly connected with a heat dissipation fan shell, a heat dissipation fan is arranged in the heat dissipation fan shell, the heat dissipation port of the resistor cabinet is provided with the filter screen, the filter screen can be detached, and when the filter screen is dirty, the filter screen can be taken down and cleaned, so that the heat dissipation performance of the resistor cabinet is improved. According to the resistor cabinet, the filter screen is arranged, so that when the resistor cabinet exchanges internal and external environment air through the heat dissipation opening, the filter screen can block dust in the air, and the filter screen is frequently cleaned, so that the dust in the filter screen can be prevented from falling into the resistor cabinet in the use process, and devices in the resistor cabinet are protected.

The utility model relates to a resistor box body, in particular to a heat dissipation window for the resistor box body, which solves the problems that the open-air environment is not considered in the design of the heat dissipation window of the existing resistor box body, and sand and dust are easy to gather in an air duct of the heat dissipation window, so that the through-flow area is reduced, and the heat dissipation is influenced. The projection parts of the second vertical sections of the S-shaped shutter strips located at the top and the projection parts of the first vertical ends of the S-shaped shutter strips located at the bottom in the plane where the first vertical sections or the second vertical sections are located coincide; the two flow guide plates guide the hot air to enable the hot air to flow to the outside, if external sand and dust enter the resistance box, the sand and dust need to move upwards against the gravity, the flow guide plates block the sand and dust, part of the sand and dust can fall on the second flow guide plate, and the included angle between the first flow guide plate and the first vertical section is 100-170 degrees; and the included angle between the second guide plate and the second vertical section is 100-170 degrees, so that a large amount of dust cannot be gathered, and smooth through-flow is ensured.

The invention discloses a chip thermistor. The chip thermistor comprises a ceramic body, a coating layer, two external electrodes and a plurality of internal electrodes, the ceramic body comprises a plurality of ceramic layers which are stacked in the first direction, the outer surface of the ceramic body is coated with the coating layer, and the two external electrodes are arranged on the ceramic body. The internal electrode is disposed in the ceramic body, and the surface area S1 on the ceramic layer and the surface area S of the ceramic layer satisfy 0.1 S < = S1 < = 0.5 S. According to the area proportion design, the electrical yield is guaranteed, meanwhile, an enough ceramic matrix bonding area is reserved, and the cracking risk can be reduced. Meanwhile, the coating layer can serve as a protective barrier to block electroplating liquid and water vapor, the corrosion and overplating phenomena are effectively improved, and the structural strength of the device is improved. In addition, the invention also discloses electronic equipment with the chip thermistor.

Disclosed in the present invention is a short-range optical potentiometer module, comprising a potential base body provided with a key slot, and a potential key which is mounted inside the key slot and can be displaced up and down, wherein a reset member for resetting the potential key is also arranged inside the key slot, an optical pair transistor composed of a photosensitive element and a light-emitting element is arranged inside the potential key, the optical pair transistor can be displaced up and down along with the potential key, a key base is internally provided with a fixed grating corresponding to the optical pair transistor, the reset member is sleeved on the grating, and the grating is configured such that the flux of light received by the photosensitive element from the light-emitting element changes along with the up-and-down displacement of the potential key, thereby causing an electrical signal generated by the photosensitive element to change along with the displacement of the potential key. The module of the solution uses non-contact photoelectric elements, thereby greatly increasing the service life; when the change in flux of light at the same distance is adjusted, the overall height of the module is close to or the same as the height of a potential base body; and the module has a skillful overall structure layout, can be conveniently assembled and replaced, and has strong practicality.

The invention discloses low-temperature curing slurry for a thick film hybrid circuit and a preparation method of the low-temperature curing slurry, and relates to the technical field of electronic slurry. Wherein the organic carrier comprises 35 to 55 weight percent of thermosetting resin and 45 to 65 weight percent of solvent; the thermosetting resin comprises at least two of epoxy resin, modified epoxy resin and organosilicon modified polyester resin, the epoxy resin is bisphenol A type solid resin, and the modified epoxy resin is an alkoxy siloxane modified product with an epoxy functional group. According to the invention, at least two of epoxy resin, modified epoxy resin and organosilicon modified polyester resin are adopted as matrix resin, the epoxy resin is bisphenol A type solid resin, a body network structure is formed after curing and crosslinking, the crosslinking density is high, the modified epoxy resin is an alkoxy siloxane modified product with an epoxy functional group, and the curing strength is high. Alkoxy siloxane contained in the resin can improve the adhesive force in the curing process, and in addition, the leveling property of the slurry can be improved.

A surge protective device (SPD) module (100) includes a printed circuit board (PCB) (150), a first electrode (122), a second electrode (124), and a disc varistor (140) electrically connected between the first and second electrodes. The SPD module forms a housing assembly (121) defining a chamber (123) containing the varistor. The PCB forms a portion of the housing assembly.

This method for manufacturing an electronic component unit (1) is provided with: a first step for manufacturing a base member (2); and a second step for assembling, to the base member (2), either a connector-type housing (3A) integrally and additionally molded on the base member (2) or a housing-type housing (3B) assembled so as to engage with the base member (2). When the connector-type housing (3A) is selected, the connector-type housing (3A) is additionally integrally formed on the base member (2) so as to fill the engagement portion (23) of the base member (2) and form the fitting opening (91), and when the housing-type housing (3B) is selected, after the pair of electric wires (6) and the pair of terminals (30) are connected, the connector-type housing (3A) is integrally formed on the base member (2). Then, the housing-type housing (3B) is assembled to the base member (2) in such a manner that the housing-type housing (3B) is engaged with the engagement section (23) of the base member (2) and the pair of electric wires (6) are inserted through the inside and outside of each of the pair of accommodating chambers (78).

The utility model discloses a PT anti-harmonic protection device which comprises three harmonic eliminator bodies arranged in an inner cavity of a box body, the inner cavity of the box body is fixedly connected with a mounting frame, the top of the mounting frame is fixedly connected with three pairs of same limiting sleeves, the bottom of each harmonic eliminator body is fixedly connected with a mounting plate, and the mounting plate is fixedly connected with a power supply. And first sliding grooves are formed in the front face and the back face of the mounting plate correspondingly, inner cavities of the first sliding grooves are slidably connected with clamping plates, and the clamping plates are clamped with the limiting sleeves. The resonance eliminator body is placed at the top of the mounting frame, the shifting block is pressed to enable the clamping plate to enter the inner cavity of the first sliding groove, at the moment, the spring shrinks, when the mounting plate reaches a proper position, the shifting block is loosened to enable the spring to stretch, and the clamping plate is clamped with the limiting sleeve, so that the resonance eliminator is fixed. Therefore, the purposes that the resonance eliminator can be quickly disassembled and assembled through the fixing structure, it is avoided that much time needs to be consumed for disassembling and assembling the resonance eliminator, and the disassembling and assembling efficiency of the resonance eliminator is improved are achieved.

The present invention relates to an electrical resistance (1) extending between a first end (2) and a second end (4), comprising a plurality of modules (10) made of an electrically insulating material and a winding (11) wound in turns around the modules (10), each of the modules (10) having an outer peripheral surface (12) and an inner peripheral surface, the modules (10) being arranged side-by-side from the first end (2) to the second end (4) of the electrical resistance (1), thereby defining a volume (44) configured for the circulation of a cooling fluid.

The invention belongs to the technical field of overvoltage protection, and particularly relates to an overvoltage protector which comprises a base, the base and a shell form a communicated sealing cavity, the sealing cavity is filled with inert gas, a flexible retaining sleeve is arranged outside a resistor disc set, a positioning pressing plate is arranged on the lower portion of the flexible retaining sleeve, and the resistor disc set is arranged on the positioning pressing plate. A low-voltage power connection column connected with the resistor disc set is arranged in the middle of the positioning pressing plate, an air exhaust assembly used for supplying inert gas to the resistor disc set is arranged outside the low-voltage power connection column, a control module in the air exhaust assembly is connected with the low-voltage power connection column in parallel, and a gas loop communicated with an inner cavity of the base is formed in the shell; through cooperation of the structure, resistance sheet mechanical stress damage caused by external force is avoided, meanwhile, inert gas circulation is triggered through voltage signals through the air exhaust assembly, the heat dissipation efficiency is improved, and resistance sheet damage caused by heat accumulation is avoided.

A ceramic thermosensitive element comprises a ceramic body, an inner electrode layer, an interconnection structure and a packaging layer. The inner electrode layer is provided with a first inner electrode layer and a second inner electrode layer which respectively cover the upper surface and the lower surface of the ceramic body. The interconnection structure is provided with a first interconnection structure and a second interconnection structure which are respectively connected with the first inner electrode layer and the second inner electrode layer and extend to the lower part of the second inner electrode layer. The packaging layer wraps the ceramic body, the inner electrode layer and the interconnection structures, so that part of the first interconnection structures and part of the second interconnection structures are located on the lower side of the packaging layer.

The invention relates to a sensor comprising a ceramic substrate (1) and two metallization layers (2) applied on opposite surfaces of the ceramic substrate (1), in which the two metallization layers (2) each comprise an adhesive layer (2A) applied directly on the ceramic substrate (1) and the two metallization layers each comprise a gold layer (2B) applied directly on the ceramic substrate (1). And the gold layer is coated on the corresponding bonding layer (2A). The invention also relates to a manufacturing method for the sensor.

The invention provides a lightning arrester core fixed based on an insulating rod and an assembly method thereof, which are used for solving various problems of a traditional metal oxide lightning arrester core. According to the lightning arrester core body fixed based on the insulating rods, the first groove and the second groove are matched and clamped with the Y-shaped clamping heads at the two ends of the insulating rods, and the core body is fixed through the plurality of insulating rods, so that the additional arrangement of structures such as an insulating cylinder is avoided, and the volume of the lightning arrester core body is reduced; meanwhile, the axial displacement of the insulating rod in the assembling and using processes is effectively avoided, so that the close contact among a plurality of resistor discs is ensured; compared with the prior art, the resistor discs pressed in a Y-shaped clamping mode are higher in stability, the plurality of resistor discs are in closer contact and do not generate gaps, and when the outer sides of the resistor discs are directly wrapped with the rubber jackets, rubber is not prone to permeating into the space between every two adjacent resistor discs.

The invention relates to the technical field of lightning arresters, and discloses a vehicle direct current lightning arrester with a built-in separation device, the vehicle direct current lightning arrester comprises an outer sleeve and a core body, the core body comprises an insulating tube, an electrode is arranged in the insulating tube, the electrode divides the interior of the insulating tube into an upper cavity and a lower cavity, the upper cavity is provided with a functional module, the functional module is used for realizing an overvoltage protection function, and the lower cavity is provided with a power supply. A separating device is arranged in the lower cavity and located on the upper portion of the lower cavity, a connecting hole communicated with the lower cavity is formed in the core body, a grounding end is arranged in the connecting hole, and the grounding end is connected with the separating device; according to the lightning arrester, when the insulating property of the upper cavity is completely lost due to a short-circuit fault, the accurate and reliable action of the separating device of the lower cavity can still be ensured when the fault occurs, the disconnection of a circuit is realized, the insulating property of the lower cavity can be kept after the action, and the risk of a secondary fault is avoided; as the disengagement device is limited in the lightning arrester, the adverse effect of scattered objects generated when the external disengagement device acts on the vehicle can be avoided.