72results about How to "Avoid short circuit failure" patented technology

The invention belongs to the technical field of power system protection and control, particularly relates to a short-circuit simulation test method and system for a subway direct-current power supply system, and aims to solve the technical problems of insufficient flexibility, difficulty in adapting to complex actual working conditions and lack of adaptivity in the prior art. The method comprises the following steps: presetting and adjusting various short-circuit fault parameters to generate a short-circuit working condition; determining a transient fluctuation separation result based on the short-circuit working condition; constructing a system topology model by utilizing a graph neural network, generating a long-term protection plan in combination with an optimized double-Q learning strategy, and generating an initial risk assessment result by adopting a neural network based on physical information and Monte Carlo simulation; constructing a hybrid risk assessment model in combination with a Bayesian network and fuzzy logic to obtain a target risk assessment result, and generating an emergency response plan based on the target risk assessment result by using a natural language generation technology and a planning algorithm; according to the invention, the precision and reliability of the short-circuit simulation test of the subway direct-current power supply system are improved.

The utility model discloses a liquid level float switch, which comprises a shell, a liquid level switch, a liquid level switch and a liquid level switch, the anti-reverse groove is formed in the shell; the fixing frame is inserted into the anti-reverse groove, and a storage area is arranged in the fixing frame; the steel balls are arranged in the storage area; the ballasting iron sand is arranged in the shell; the microswitch is arranged at the top of the fixing frame, and a cable of the microswitch sequentially penetrates through the ballasting iron sand and the bottom of the shell; the waterproof cover covers the fixing frame and the microswitch and is inserted into the ballasting iron sand; the epoxy resin fixes the waterproof cover, the ballasting iron sand, the fixing frame and the shell together. According to the utility model, the transparent special-shaped positioning waterproof cover is additionally arranged, so that water and gas can be prevented, a short-circuit fault caused by tin whiskers can be prevented, the top of the waterproof cover can be prevented from pressing a circuit through the positioning design of the waterproof cover, and the installation consistency is realized. And the problem of switch failure caused by reverse installation of the float switch is also solved.

The invention provides a shield pump. The shield pump comprises a pump head; the shielding sleeve is matched with the pump head, and a main cavity is defined by the shielding sleeve and the pump head; the stator structure comprises a stator body and an injection molding layer, the injection molding layer wraps at least part of the stator body, and a rotor mounting hole penetrating through the stator structure in the preset direction is formed in the stator structure; the rotor structure is mounted in the rotor mounting hole, and the stator structure and the rotor structure are isolated by the shielding sleeve; the impeller is arranged in the main cavity, and the impeller is connected with the rotor structure; the control box is fixedly connected with the stator structure in the preset direction, and an electrical element in the control box is electrically connected with the stator body through a connecting terminal; and the first sealing element is arranged between the stator structure and the control box, and the first sealing element is used for sealing and isolating the connecting terminal. According to the embodiment of the shield pump, the technical problem that the fault rate of a shield pump in the related technology is high is solved.

The invention provides a vision-based real-time monitoring and early warning method for abnormal postures of a holding pole. Comprising the following steps: (1) acquiring a field real-time video of a suspended derrick tower; (2) extracting picture data from the video for preprocessing; (3) detecting and positioning the derrick in the image by using an image segmentation algorithm to obtain derrick image information; (4) applying an attitude estimation algorithm to the detected derrick to estimate attitude parameters of the derrick; and (5) setting a reasonable attitude range, comparing and analyzing the attitude parameters of the holding pole, and judging whether an abnormal attitude exists or not. By means of the method, posture abnormity of the suspension derrick can be rapidly and accurately monitored and early warned, potential risks are recognized in advance, and reliability and stability of the derrick are ensured. And meanwhile, whether foreign matters are attached or not can be detected while the posture abnormity of the holding pole is detected, and the problems of insulation short circuit and the like are avoided.

The utility model discloses a totally-enclosed breast pump, which comprises a collecting assembly, a liquid blocking driving part and a negative pressure assembly, the collecting assembly comprises a breast sucking shield and a milk storage container, the breast sucking shield is used for fitting a breast, the milk storage container is used for collecting milk, and the breast sucking shield is communicated with the milk storage container; the liquid blocking driving piece is integrally formed on the collecting assembly and connected with the collecting assembly in a sealed mode. The negative pressure assembly is pneumatically or mechanically or electrically connected with the collecting assembly, negative pressure is applied to the collecting assembly through the liquid blocking driving piece, and the breast pump is divided into two gas-liquid separation parts through the liquid blocking driving piece. The technical scheme of the utility model provides a totally-closed breast pump capable of preventing milk from being sucked into an air path.

A short circuit detection circuit before closing of a charging pile relay relates to the field of electric vehicle charging piles, driving voltage drives a light emitting diode of an isolation optocoupler to be lightened, so that a detection signal of an MCU of a charging pile is changed from a high level to a low level, and the MCU of the charging pile forbids the relay to be closed according to a low level signal of short circuit detection. And equipment tripping or equipment damage is avoided. When the load end of the relay is connected with the charger and the battery of the electric vehicle, the resistance of the load end is increased, so that the voltage of the input side of the isolation optocoupler 6 is reduced, the light emitting diode in the driver cannot be lightened, and the detection signal of the MCU is always kept at a high level. Before the relay of the charging pile is closed, whether the output end of the relay is short-circuited can be detected, so that short-circuit faults are avoided, the maintenance cost is reduced, the service life of equipment is prolonged, and major fire disasters are avoided.

The invention belongs to the technical field of corneal contact lens cleaning, and discloses a corneal contact lens cleaning control circuit and control method. The cleaning control circuit comprises an electrode slice output circuit, and a power supply circuit, a current limiting circuit, a waveform control circuit and a monitoring circuit which are connected in series with the electrode slice output circuit, wherein the waveform control circuit and the monitoring circuit are in signal connection with a single chip microcomputer; the power supply circuit is used for supplying power to the electrode plate output circuit; the electrode plate output circuit comprises a pair of electrode plates and is used for introducing the modulated waveform into the cleaning liquid; the current-limiting circuit comprises a current-limiting resistor and is used for current-limiting protection of the electrode plate; the waveform control circuit is used for controlling output current waveforms at two ends of the electrode plate; the monitoring circuit is used for monitoring output voltage values and current values at the two ends of the control electrode plate. The cleaning fluid is introduced by modulating the preset waveform, the equipment is cleaned according to the preset program in cooperation with program setting, it can be guaranteed that the cleaning effect of each time is stable and consistent, it is guaranteed that the cleaning work is reliable, and the cleaning effect and the cleaning efficiency are effectively improved.

A waterproof and dustproof downlight comprises: an outer shell tube, a chamber is formed therein, the chamber has an upper opening and a lower opening, and a partition is transversely arranged in the chamber; an upper shell cover is arranged in the upper opening of the chamber of the outer shell tube; an upper waterproof box is hollow and arranged on the top surface of the partition, and an upper chamber is formed on the bottom of the upper waterproof box, and an upper waterproof gasket is arranged on the annular circumference of the bottom of the upper waterproof box to seal the upper chamber; a lower waterproof box is hollow and arranged on the bottom surface of the partition, and a lower chamber is formed on the top of the lower waterproof box, and a lower waterproof gasket is arranged on the annular circumference of the top of the lower waterproof box to seal the lower chamber; and a light source assembly is fixed on the bottom surface of the partition, arranged in the lower chamber of the upper and lower waterproof boxes, and electrically connected to the power supply circuit assembly. The upper and lower waterproof boxes and the waterproof gasket provide good waterproof and dustproof functions.

The invention relates to the technical field of refrigeration compressors, and discloses a junction box protection device for a refrigeration compressor, the junction box protection device comprises a refrigeration compressor body, a power panel is arranged on the outer end face of the refrigeration compressor body, and a protection mechanism, a dehumidification mechanism and an assembly mechanism are arranged on the outer side face of the power panel; the protection mechanism comprises a driving part and a protection part; the protection part is located on the inner side face of the driving part. Through the protection mechanism, a rotating handle in a driving part is utilized, so that the rotating handle rotates to drive a threaded rod, the threaded rod drives a threaded block, and the threaded block drives an upper closing plate, so that the upper closing plate slides out of a through groove, a movable plate performs angle change under the action of a polished rod, the top of the junction box is opened, and wires of the junction box are placed above a lower closing plate; therefore, the upper plywood and the lower plywood are enabled to protect the wires through reverse operation, and the junction box and the wires are effectively protected from being damaged by external environments, such as dust, moisture, corrosive substances and the like.

The utility model relates to electronic protector technical field, concretely is a kind of TVS device with automatic open circuit protection function, including device body, automatic open circuit protection mechanism and pin connecting mechanism, and automatic open circuit protection mechanism and pin connecting mechanism are fixedly connected in the inside of device body, in the utility model, through the setting of fusible wire, temperature sensor and memory alloy spring, the automatic open circuit protection of TVS device when encountering abnormal overcurrent or overvoltage is realized, fusible wire can rapidly fuse, and timely cut off circuit connection, prevent the further expansion of fault range, temperature sensor real-time monitoring temperature, when temperature abnormally rises, memory alloy spring will rapidly change under the signal driving of temperature sensor, the pressure generated by its deformation can assist fusible wire to fuse more quickly when reaching fusing temperature, greatly shorten the response time of automatic open circuit protection, greatly improve the security and reliability of circuit.

The invention relates to the technical field of power control equipment, in particular to a short-circuit-preventing power control box which comprises a box body, a monitoring mechanism is installed in the box body, the monitoring mechanism comprises a monitoring box, the monitoring box is fixedly installed at the bottom of an inner cavity of the box body, and a fixing seat is fixedly installed at the top of the monitoring box. A temperature sensor is fixedly installed at the top of the fixing seat, the main wire is fixedly installed in the fixing seat, first connecting wires are fixedly installed at the two ends of the main wire, the circuit switching mechanism is installed at the two ends of an inner cavity of the box body, and the circuit switching mechanism comprises two first supports. Through the arrangement of the monitoring mechanism, the short-circuit condition of the whole circuit can be monitored, once short-circuit hidden dangers occur, an alarm or a signal can be quickly sent out, maintenance personnel can know the short-circuit hidden dangers in time and take measures, and the situation that short-circuit faults further develop into serious electric power accidents is avoided.

The present application relates to the technical field of transmitter, in particular to a kind of anti-condensation wind pipe type temperature transmitter, including the mounting bracket of fixed installation in the side wall of ventilation pipe, humidity detection component is fixedly installed in mounting bracket, temperature sensing tube is rotatably installed outside humidity detection component, the motor for driving temperature sensing tube rotation is fixedly installed in the side wall of mounting bracket, the dew removal device for removing condensation is equipped outside temperature sensing tube, both ends of temperature sensing tube are equipped with plugging component, and plugging component removes the plugging of temperature sensing tube end when temperature sensing tube rotates.The present application utilizes low-temperature high-humidity condition to trigger temperature sensing tube rotation, removes condensation by centrifugal throwing, and cooperates with reciprocating scraping to completely remove surface condensation, simultaneously utilizes friction micro-heat to improve pipe wall temperature, which is higher than dew point temperature, to inhibit condensation from generating again from source, while ensuring temperature measurement accuracy, significantly reduces equipment power consumption, solves the problems of poor anti-condensation reliability, high energy consumption and serious temperature measurement drift of traditional products.

The present invention proposes a wiring structure for pressure-bearing equipment, including a pressure-bearing equipment housing, a protective cover, a terminal, a power cord, a cover plate and a terminal connection plate. The cover plate is sealed on the protective cover and connected with the protective cover to form a protective box with a wiring cavity inside; the protective cover is welded to the outer wall of the pressure-bearing equipment housing, and the terminal connection plate is arranged in the protective cover, with its back abutting against the bottom of the protective cover, and the terminal connection position thereon is arranged one-to-one with the external connector of the terminal and the power cord connector of the power cord; the power cord connector of the power cord, the external connector of the terminal and the terminal connection plate are fastened and connected by terminal bolts, power cord connector perforations, external connector perforations of the terminal and the mounting holes of the terminal connection plate. The present invention has a simple structure and is easy to produce. It not only meets the high reliability requirements of waterproof, dustproof and electric shock proof, but also is suitable for use in relatively harsh environments, greatly prolonging the service life of the core components of the pressure-bearing equipment and improving the stable operation time of the pressure-bearing equipment.

The invention provides a light-emitting device, a preparation method thereof and a display panel, and belongs to the technical field of photoelectron manufacturing. The light-emitting device comprises a substrate, a bearing layer, a plurality of light-emitting units, a light-emitting unit protection layer and a planarization layer, the bearing layer is located on the substrate, the plurality of light-emitting units are located on the bearing layer, and each light-emitting unit comprises a light-emitting structure and an electrode structure located on the surface of the light-emitting structure; the light-emitting unit protection layer covers the side walls and the surfaces of the light-emitting structures of the plurality of light-emitting units and the side walls and the surfaces of the electrode structures, the light-emitting unit protection layer is in contact with the bearing layer, and the light-emitting unit protection layer is provided with a first through hole in the surface of each electrode structure; and the planarization layer covers the bearing layer, the plurality of light-emitting units and the light-emitting unit protection layer.

This utility model relates to the field of conductive busbar lead wire fixing technology, and discloses a conductive busbar lead wire fixing device for a high-current motor, including: a support plate mounted on the motor frame, a conductive ring welded to the motor stator coil, and a conductive busbar connected to the conductive ring; a lead wire plate is connected to the surface of the support plate, and the lead wire plate has multiple lead wire holes, through which the conductive busbar passes and is fixed to the lead wire plate by fixing bolts. This conductive busbar lead wire fixing device for a high-current motor, by setting a lead wire plate and lead wire holes, allows the conductive busbar to pass through the lead wire holes on the lead wire plate. The lead wire holes limit the distance between the conductive busbars, ensuring that even if the conductive busbars become loose during transportation, debugging, and operation of the motor, an electrical safety insulation gap is maintained, avoiding wear and rubbing problems of the motor's conductive busbars. The structural improvement effect is significant, improving electrical safety and preventing short circuit faults.

This invention relates to a method and apparatus for replacing an uninterrupted power supply (UPS) energy meter. The method includes: connecting an energy meter replacement device in parallel to the incoming and outgoing line sides of the energy meter to be replaced; the energy meter replacement device acquiring zero-crossing signals of the incoming and outgoing line voltages of the energy meter to be replaced; determining whether the three-phase wiring sequence is consistent based on the zero-crossing signals; if the three-phase wiring sequence is consistent, the energy meter replacement device switching the main circuit to the backup circuit to ensure uninterrupted power supply to the user side; removing the energy meter to be replaced and installing a new energy meter while the backup circuit is in operation; and acquiring electrical parameter data in real time during the meter replacement process; detecting whether any abnormality occurs during the meter replacement process based on the electrical parameter data; if an abnormality occurs, triggering a protection action and disconnecting the bypass circuit; and after the meter replacement is completed, the energy meter replacement device switching the circuit back to the main circuit and generating a meter replacement operation log.

The utility model relates to a box bottom cable moistureproof threading connection structure of a distribution box, comprising a distribution box body, the bottom of the distribution box body is provided with two wire inlets which are symmetrically distributed left and right, the distribution box body is internally provided with four moistureproof assemblies, every two of the four moistureproof assemblies are in one group, and the other two of the four moistureproof assemblies are in one group. The moisture-proof assemblies are symmetrically distributed up and down, each group of moisture-proof assemblies is mounted through a wire inlet, each moisture-proof assembly comprises a mounting base and a sealing ring, a cable enters the distribution box body through the interior of the mounting base, and after the cable is connected with an electrical element in the distribution box body, gas is injected into the cavity through the gas nozzle, so that the electrical element in the distribution box body is sealed. The sealing ring is tightly attached to the gap between the cable and the mounting base after expansion, so that a physical barrier is formed, moisture is effectively prevented from entering the box body, and cable insulation layer aging, metal part corrosion or short circuit faults caused by the moisture are avoided.

There is provided a semiconductor device including: a substrate having an active region formed thereon; a gate stack on the active region; a circuit wiring disposed over the gate stack; and a contact via structure on a side surface of the gate stack and between the active region and the circuit wiring, in which the contact via structure includes: a gate contact via extending between the circuit wiring and the active region; a first contact insulating film covering a portion of a side surface of the gate contact via and exposing a remaining portion of the side surface; and a second contact insulating film covering a portion of a side surface of the first contact insulating film, exposing a remaining portion of the side surface, and exposing a remaining portion of a side surface of the gate contact via.

The present invention provides a coil device (1) capable of preventing short circuit failure, comprising: a core (10) including a winding core portion (12) and a flange portion (14) formed at an end portion of the winding core portion (12) in the X-axis direction; a coil portion (30) formed by winding wires (31, 32) around the winding core portion (12); and terminal electrodes (41, 42) provided on the flange portion (14) and connected to lead-out portions (310, 320) of the wires (31, 32) respectively. A main raised portion (144) having a raised shape is formed on the upper surface (14a) of the flange portion (14) on which at least a portion of the terminal electrodes (41, 42) are arranged, and a second lead-out portion (320) of a second wire (32) is connected to the second terminal electrode (42) on the outside of the main raised portion (144) in the X-axis direction.

The application relates to the technical field of dry transformers, and particularly discloses an amorphous alloy dry transformer with a double-layer shell structure, which comprises a mounting box body, a damping pad is fixedly connected to the bottom of the mounting box body through a support, a rain shelter is fixedly connected to the top of the mounting box body through a support, cooling devices are fixedly connected to the two sides of the mounting box body, and a transformer body is fixedly connected to the bottom of the mounting box body through a damping device. The amorphous alloy dry transformer with the double-layer shell structure is provided with the damping device, can absorb most of the vertical and horizontal vibrations generated during the operation of the transformer, and can automatically clean dust on the air inlet of the cooling device and scatter and agitate the drying agent by using the weakened slight vibration, so that the cooling and ventilation effect is improved.

The present invention discloses a thyristor press-fitting device, which relates to the technical field of thyristor equipment, and includes a press-fitting unit, including a mounting assembly, an adjustment assembly installed inside the mounting assembly, and a press-fitting assembly arranged at the bottom of the adjustment assembly. The beneficial effect of the present invention is that the disc spring cooperates with the adjustment bent plate, so that the adjustment of the press-fitting force is more flexible and accurate. Different types of thyristors can obtain the best press-fitting force by simply adjusting the stiffness and compression of the disc spring, ensuring that the thyristor is always in the best press-fitting force state during operation. The press-fitting force of the thyristor can be accurately controlled through the scale indication on the outside of the top cover and the deformation of the disc spring. The correct press-fitting force effectively improves the heat dissipation performance of the thyristor, prevents heat accumulation caused by excessive or too low press-fitting force, and reduces the mechanical stress on the silicon wafer under working conditions with frequent thermal cycles, thereby increasing the service life of the thyristor, avoiding the wear of the cathode strip coating, and preventing the occurrence of short-circuit faults.

The invention relates to power control technology, and proposes a driving interlocking circuit of an intelligent power module and an intelligent power module. The interlocking circuit is an interface circuit composed of multiple transistor switch circuits, and the interlocking circuit includes an input end, an output end, and an interlocking signal input end; the input end is used to connect to the first control end of a bridge arm; the output end is used to connect to the first power end; the interlocking signal input end is used to connect to the second control end of the above bridge arm; the potential signal of the input end is transmitted to the output end through the interlocking circuit; when the input end and the interlocking signal input end input a high level at the same time, the interlocking circuit outputs a low level through the output end. The driving interlocking circuit makes it impossible for the driving signal of the same bridge arm to be high at the same time, that is, the upper and lower IGBT tubes of the same bridge arm cannot be turned on at the same time, avoiding the short circuit fault caused by the upper and lower IGBT tubes of the same bridge arm being directly turned on.

The present invention provides an induction cooker, comprising a bottom shell (10) and a panel (50) which is covered on the bottom shell (10) and has a fire viewing area (51); a fire viewing box (30) corresponding to the fire viewing area (51) is arranged in the bottom shell (10); the fire viewing box (30) is used to project light onto the fire viewing area (51); and further comprises: an insulating spacer (31) and a light bar (32) provided with a plurality of light-emitting elements; wherein the light bar (32) is arranged on an outer wall (301) of the fire viewing box (30); and a side of the light bar (32) provided with the light-emitting elements faces the outer wall (301) of the fire viewing box (30); and the insulating spacer (31) covers the other side of the light bar (32) which faces away from the outer wall (301). The induction cooker provided by the present invention saves the use space in the induction cooker and avoids the occurrence of a short circuit fault between the light bar and the light panel.

This utility model discloses a moisture-proof and sealed installation structure for the control panel of a pellet oven, comprising: a controller; and a protective unit, wherein the protective unit is installed on one side of the controller surface to protect the controller surface. This utility model uses the protective unit installed on the surface of the controller to seal and protect the control panel on one side of the controller, preventing prolonged contact between external humid air and the control panel. A locking unit controls the opening and closing of the protective unit; opening the protective unit allows operation of the controller, while closing the protective unit prevents external moisture from contacting the control panel. Finally, a moisture-proof unit dehumidifies the interior of the closed protective unit, improving safety, preventing short-circuit malfunctions of the controller, and effectively extending its service life.

The utility model relates to the technical field of engine cover plate, especially relates to a dustproof and waterproof sealed engine cover plate, including first fixed plate and second fixed plate, the first fixed plate and second fixed plate between joint sealing assembly fixedly connected have, the sealing assembly upper end sleeve joint has the protection assembly, protection assembly upper end four corners all threadedly connected have bolt. The utility model discloses a dustproof and waterproof sealed engine cover plate, along with bolt tightening, protection assembly presses sealing assembly, and sealing washer is extruded and produces elastic deformation, and tightly fits the lower end surface of aluminium alloy shell, forms an elastic barrier, and the dust and moisture of outside are blocked outside the edge of cover plate, simultaneously, the sealing ring is extruded by the fire -retardant inner shell, fills the gap between sealing washer and fire -retardant inner shell, constructs the second sealed defense line, effectively avoids the trouble that engine causes dust accumulation to lead to poor heat dissipation, causes circuit short circuit because of water vapor erosion, prolongs the maintenance cycle and the service life of engine.

The invention provides a lightning arrester, which comprises an arc extinguishing tube, the arc extinguishing tube comprises a tube body and an arc extinguishing medium, the tube body is internally provided with an accommodating space, the arc extinguishing medium is arranged in the accommodating space, the end part of the tube body is provided with an opening, and the opening is communicated with the accommodating space; the action indicator is separably arranged at the opening, the action indicator comprises an indicating head and a mounting column, the first end of the mounting column is connected with the indicating head, the second end of the mounting column is inserted into the accommodating space through the opening, and the second end of the mounting column is provided with a guide inclined plane. According to the technical scheme provided by the invention, the problem that the airflow sprayed by the lightning arrester in the related technology is easy to cause the insulation reduction of the adjacent wires to cause a short-circuit fault is effectively solved.

The utility model discloses a night lighting device for civil engineering buildings, and relates to the technical field of lighting devices. The connecting protruding block is installed in the installing cavity, the rotating part used for driving the connecting protruding block to rotate is arranged in the inner cavity of the installing cavity, the liquid storage part used for storing the insect repellent is installed on the outer wall face of the connecting protruding block, and the insect repellent part used for spraying the insect repellent to the surface of the illuminating lamp is arranged on one side of the liquid storage part. The insect expelling part can spray insect expelling liquid medicine to the surface of the illuminating lamp, so that the effect of killing part of mosquitoes is achieved, a large number of mosquitoes are prevented from gathering at the illuminating lamp, a short-circuit fault of the illuminating lamp due to the fact that a large number of mosquito corpses remain at the illuminating lamp can be prevented, and the illuminating lamp can be protected. The service life and the normal lighting effect of the lighting lamp are effectively guaranteed, and meanwhile the cleanliness and tidiness of the surface of the lighting lamp are guaranteed; and through the arranged liquid storage part, an insect repelling agent can be stored, and the effect of supplementing the insect repelling agent for the insect repelling part can also be achieved.

The utility model relates to a kind of assembled conductive copper bar structure, specifically a kind of assembled high load flow distribution's conductive copper bar structure, including assembling seat, two sides on the assembling seat are provided with slot, the side of the assembling seat is provided with fixed seat and the holding plate of the side of the fixed seat, copper bar body is provided between the assembling seat and fixed seat, adjusting mechanism and the limiting fastening mechanism for being used to the assembling of copper bar body are provided in the assembling seat, the adjusting mechanism is cooperated with the transmission mechanism of the side of the fixed seat, the utility model is inserted into the cooperation between the assembling seat and fixed seat, realize the way of inserting into to the superposition fixed of multilayer copper bar, need not be on copper bar hole for bolt fixed, effectively simplify installation and dismounting process, avoid the copper bar structure strength weakening and stress concentration problem possibly caused by hole simultaneously, guarantee the structural integrity and mechanical properties of copper bar.

This invention provides a voltage detection device, including a voltage detection head, a voltage detection unit, and an operating lever. The voltage detection head includes a voltage detection probe, a rotating ball integrally connected to the voltage detection probe, and a support column with threads at its lower end. The voltage detection unit includes a rotating assembly, a switching assembly, a steering mechanism, a first detection module, and a second detection module. The support column passes through the switching assembly and is movably connected to the steering mechanism. Rotation of the support column presses and activates the switching assembly. The support column is electrically connected to the first detection module, and the switching assembly is electrically connected to the second detection module. In this invention, the voltage detection head drives the rotating ball to rotate, which in turn presses and activates the switching assembly. The second detection module provides immediate feedback on whether the voltage detection operation conforms to the operating specifications, resolving the problem of ineffective voltage detection and eliminating significant safety hazards. Furthermore, the independent first and second detection modules effectively prevent the second detection module from short-circuiting due to strong voltage or current generated during voltage detection, further ensuring the reliability of the voltage detection operation specifications.