35 results about "Electrically short" patented technology

A thermosensitive wire includes a pair of conductive wires each covered with an insulator that softens at a preset temperature, and the pair of conductive wires are configured to come into contact with each other to be short-circuited in response to the insulator softening. A power supply system includes: a second power source configured to supply power to the pair of conductive wires; a short circuit detector configured to detect that the pair of conductive wires are short-circuited; a disconnection detector configured to detect that the pair of conductive wires are disconnected; and a controller configured to perform, for power supply to a power supply wire, abnormality control that differs between in the case where the short circuit detector detects that the pair of conductive wires are short-circuited and in the case where the disconnection detector detects that the pair of conductive wires are disconnected.

The invention belongs to the technical field of energy storage systems, and particularly relates to a battery PACK and an energy storage system. The battery PACK comprises a battery management unit BMU and a plurality of battery cells, each battery cell is integrated with a wireless communication module, the battery management unit is also integrated with a wireless communication module, and each battery cell and the battery management unit BMU perform wireless communication by using the respective wireless communication module. The method has the advantages that hardware such as cables, connectors and wire ducts is omitted, and the cost advantage is remarkable especially in a large-scale system; when part of battery modules are offline due to faults or newly added modules are accessed, a wireless communication network can automatically reconstruct a topological structure to ensure the stability of a communication link, and a wired system needs to manually adjust the wiring topology; wireless communication does not need electrical connection, electrical isolation between the battery pack and the BMU is naturally achieved, and the risks of electric leakage and short circuit in a high-voltage system are reduced.

The invention provides a flexible direct-current transmission short-circuit current control strategy multi-objective optimization solving method, which specifically comprises the following steps of: 1, constructing a receiving end fault two-port model, and solving parallel fault transition impedance in a receiving end power grid fault model; step 2, in combination with parallel fault transition impedance, deriving a minimum reactive current reference value constraint required by AC voltage support in a fault period and an active current constraint allowed by DC side energy balance and DC voltage upper limit; and step 3, obtaining the short-circuit current safety domain under the three-phase short-circuit fault by combining the minimum reactive current required for reducing the voltage drop when the short-circuit fault occurs, the active current which can be provided by the receiving-end converter station MMC and the amplitude constraint condition of the short-circuit current output by the receiving-end converter station MMC. According to the invention, adaptive analysis and optimization are carried out on an existing short-circuit current control strategy, and it is ensured that the optimized control strategy not only can reduce unbalanced power accumulation, but also can be used for supporting alternating-current power grid voltage through reserved capacity.

This invention discloses an extrusion molding device for producing insulated cables, belonging to the technical field of cable production equipment. The proposed solution includes a base and a wire feeding mechanism located on one side of the top of the base for automatically feeding insulated cables. An extrusion molding mechanism is located on the top of the base. This invention not only ensures consistent insulation layer thickness and a smooth surface through the circumferential smoothing design of the scraper in the extrusion molding mechanism, effectively guaranteeing the insulation performance of the cable and reducing safety hazards such as leakage and short circuits caused by uneven insulation layer thickness, but also avoids waste of raw materials caused by unusable solidified residual insulation material through cleaning of the molding chamber's inner wall, reducing insulation material loss. Furthermore, the use of "circumferential spraying + water-cooled liquid circulation" can quickly reduce the insulation layer temperature to the setting temperature, preventing deformation and uneven shrinkage of the insulation layer due to slow cooling, further ensuring the appearance and structural stability of the cable.

This invention proposes a multi-objective optimization solution method for short-circuit current control strategy in flexible DC transmission, specifically including: Step 1, constructing a two-port model of the receiving-end fault and solving for the parallel fault transition impedance in the receiving-end grid fault model; Step 2, combining the parallel fault transition impedance, deriving the minimum reactive current reference value constraint required to support AC voltage during the fault, and the active current constraint allowed by the DC side energy balance and DC voltage upper limit; Step 3, combining the minimum reactive current required to reduce voltage drop during a short-circuit fault, the active current that the receiving-end converter station MMC can provide, and the short-circuit current amplitude constraint condition output by the receiving-end converter station MMC, obtaining the short-circuit current safety domain under three-phase short-circuit faults. This invention adaptively analyzes and optimizes existing short-circuit current control strategies, ensuring that the optimized control strategy can both reduce unbalanced power accumulation and support AC grid voltage through reserved capacity.

The application discloses a power supply management method of a storage system and electronic equipment, relates to the technical field of storage systems, and comprises the following steps: if the power supply state of a power supply unit of the storage system is an abnormal state, the fan rotating speed is reduced; if the power supply unit recovers to a normal state within a first preset time period after the abnormal state, if the power supply state of a hard disk module is an abnormal state, the enable signal of a voltage regulating power supply and the enable signal of a first electronic fuse of the hard disk module are reset, the power supply unit is used for supplying power for the storage system, and the fan rotating speed is recovered; the power supply unit supplies power for the voltage regulating power supply through the first electronic fuse; the voltage regulating power supply is configured in a power supply short-circuit abnormal permanent protection mode, and the first electronic fuse is configured in an overcurrent short-circuit abnormal self-locking permanent protection mode. The power supply link recovery mode in the related art reduces the reliability of the storage system, and the technical effect of improving the reliability of the storage system is achieved.

1. The name of the design product: air switch. 2. The use of the design product: used for closing, carrying and breaking circuit, and providing current leakage and short circuit protection for circuit. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

A substrate includes a core layer and one or more metallization layers. The core layer provides stabilization to the substrate to reduce or avoid warpage. The core layer may include a glass material weaved throughout the core to provide stabilization and avoid warpage. A metallization layer adjacent to the core layer in the substate includes an insulation layer and the embedded metal structure(s) that is positioned from the core layer. The thickness of the insulation layer is greater than the embedded metal structure so that a surface of the embedded metal structure is positioned at least at a length from the surface of the glass material. This can avoid or reduce the risk of the embedded metal structure electrically shorting to another metal structure in the substrate through the core layer.

To provide a piezoelectric actuator with a strain gauge capable of compensating the influence of temperature change.SOLUTION: A driving part 111 in which a plurality of piezoelectric ceramic layers 113 and a plurality of internal electrodes 115 and 116 are alternately stacked and which is driven when a voltage is applied to the internal electrodes 115 and 116, and a plurality of second piezoelectric ceramic layers 114 and a plurality of second internal electrodes 117 and 118 which are formed in series in a stacking direction of the driving part 111 and are alternately stacked, A piezoelectric actuator 100 includes a piezoelectric actuator body 105 including a non-driving portion 112 that is not driven even when a voltage is applied, a strain gauge 131 that is connected to a driving portion 111 and detects strain in a displacement direction of the driving portion 111, and a second strain gauge 132 that is connected to the non-driving portion 112 and detects strain in the displacement direction of the non-driving portion 112, in which a second piezoelectric ceramic layer 114 is polarized, and second internal electrodes 117 and 118 are electrically short-circuited.SELECTED DRAWING: Figure 1

The invention provides a strong and weak current automatic plugging connection device, which comprises a frame, a floating device, an explosion-proof connector, a guide pin and an explosion-proof junction box, and is characterized in that the floating device is mounted at the top end of the frame; the anti-explosion connector is installed in the middle of the front face of the floating device, and the guide pins are symmetrically installed on the two sides of the anti-explosion connector. And the explosion-proof junction box is arranged on the side surface of the frame. According to the device, through automatic accurate control, the connection reliability is improved, the device is suitable for various complex assembling scenes and narrow operation spaces, and the problems that traditional manual plugging is low in positioning precision and unstable in force control, contact pins are prone to being damaged or poor in contact, strong current short circuit is caused, and weak current signals are lost are effectively solved.

1. The name of the design product: underground cable tracer (NF-829). 2. The use of the design product: for detecting the direction of underground cable, power failure, short circuit point. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: kit 1 perspective view 1. 5. Kit description: kit 1 is a detection signal transmitter, and kit 2 is a detection signal receiver.

This utility model discloses an indoor power distribution cable wall-penetrating protective installation device, relating to the field of wire installation technology. The device includes a first protective arc plate and a second protective arc plate. The first protective arc plate is hinged to the second protective arc plate. The second protective arc plate has a fixing structure and an adjustment structure, which is located on the first protective arc plate. This device, through the first and second protective arc plates and the first and second telescopic arc plates, forms a complete circular tube structure, completely enclosing the wall-penetrating cable and isolating it from the sharp edges of the wall. Even with long-term use, it effectively protects the cable insulation layer, preventing dangerous situations such as leakage and short circuits. The protective sleeve is fixed by gaskets and locking nuts, allowing for flexible adjustment of the overall length of the protective device to ensure a tight fit to walls of different thicknesses, further improving the ease of installation.

According to an example aspect of the present invention, there is provided an antenna array arranged to control a radar response of a target, comprising multiple ultra wideband antennas, wherein each of said multiple antennas is coupled to a separate switch, and each switch is arranged to control one of said multiple antennas such that when said one antenna is connected to a load, preferably matched load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein at least one of said multiple antennas is arranged to be electrically shorted at a first time instant and the at least one of said multiple antennas is arranged to be connected to a load, preferably matched load, at a second time instant, and at least one other of said multiple antennas is arranged to be connected to a load, preferably matched load, at the first time instant and the at least one other of said multiple antennas is arranged to be electrically shorted at the second time instant.

The utility model discloses a novel installation structure transformer bushing which comprises a porcelain bottle and a conducting rod arranged on the inner side of the middle of the porcelain bottle, the tail end of the upper side of the conducting rod is provided with a wiring terminal, the tail end of the lower side of the conducting rod is provided with a connecting nut, and the joint of the porcelain bottle and the tail end of the lower side of the conducting rod is provided with an American transformer flange. The bushing can automatically release overhigh air pressure in the bushing through an automatic deflation function, prevents a porcelain bottle from being broken due to overhigh pressure, avoids possible safety accidents such as electric leakage and short circuit, protects the safety of equipment and personnel, can adjust the internal pressure in time, can reduce the equipment fault probability caused by the pressure problem, and improves the working efficiency. According to the utility model, the operation of the transformer bushing is more stable and reliable, the continuity of power transmission is ensured, the damage of abnormal pressure to porcelain bottles and other parts is avoided, the service lives of the transformer bushing and the whole transformer equipment are prolonged, and the maintenance and replacement cost of the equipment is reduced.

The utility model discloses a multilayer structure graphene heat dissipation film, which relates to the technical field of graphene heat dissipation films and comprises a heat dissipation film body, and the top of the heat dissipation film body is provided with an insulating heat-resistant assembly. According to the utility model, through the arrangement of the insulating heat-resistant assembly, the effects of preventing electric leakage and short circuit of the graphene heat dissipation film and enabling the heat resistance of the graphene heat dissipation film to be higher can be achieved, and the problems that the heat dissipation film is in contact with lines or elements with different potentials due to the fact that the heat dissipation film cannot be prevented from short circuit and electric leakage, current is possibly conducted abnormally, and short circuit is caused can be avoided; when a human body is in contact with the graphene heat dissipation film, the heat dissipation film is electrified, and an electric shock accident is easily caused, so that the insulativity of the graphene heat dissipation film is ensured, and the heat dissipation effect of the graphene heat dissipation film is improved. And meanwhile, the first insulating adhesive coating and the second insulating adhesive coating can achieve the damping and buffering effects, so that the safety of the graphene heat dissipation film is improved.

The utility model relates to the technical field of cable terminal heads, in particular to a cable terminal head with an insulating sheath, which comprises a cable terminal head body, a detachable insulating sheath is arranged outside the cable terminal head body, one side of the insulating sheath is provided with an embedded groove, the other side of the insulating sheath is provided with a clamping block, and the clamping block is connected with the embedded groove. The clamping block is connected with the embedded groove in a clamping mode, and a notch is formed in the insulation sleeve. The cable terminal head is provided with the insulation sleeve, comprehensive insulation protection is provided for the cable terminal head through the design of a multi-layer insulation structure in the insulation sleeve, current leakage is effectively prevented, risks of electric leakage, short circuit and other electrical faults caused by poor insulation performance are reduced, and the insulation sleeve can be firmly fixed on the cable terminal head body. The connection tightness and stability between the insulation sleeve and the cable terminal head body are ensured, the insulation structure is ensured not to be damaged by external force, and the long-term effectiveness of the insulation performance is further ensured.

The utility model discloses a novel bottom box structure, relates to the technical field of office wiring, and aims to solve the problem of unreasonable wiring under a table in an office area, the novel bottom box structure comprises a rear plate with two long edges and two short edges, one long edge of the rear plate is hinged with one long edge of a bottom wire passing plate, and the other long edge of the rear plate is hinged with one short edge of the bottom wire passing plate. The other long edge of the bottom wire passing plate is hinged to a front plate, the two short edges of the rear plate are respectively hinged to a side surface wire passing plate, the front plate and the rear plate are provided with placing plate mounting grooves, and placing plates are connected in the placing plate mounting grooves, so that the problem of station wiring is solved, the utilization of the desktop space is optimized, and the working efficiency is improved. In addition, the table has a quick-assembly function, safety risks such as electric leakage and short circuit caused by the fact that wires are exposed outside are reduced, the table can be expanded and assembled according to user requirements, the maintenance difficulty can be reduced, and the practicability can be improved.

The application discloses a charging pile with multi-mode charging function, and particularly relates to the technical field of charging piles, which comprises a multi-mode charging pile, the outer part of charging gun warehouses on the two sides of the multi-mode charging pile is fixedly installed with protective shells, the two sides of the multi-mode charging pile are respectively provided with protective shells, two mounting racks are fixedly installed on the side of the protective shell close to the multi-mode charging pile, the cooperation of the protective shell and the telescopic bellows realizes the storage and standard wiring of the cable, the protective shell shields the cable body, the telescopic bellows wraps the exposed part, the double barriers prevent the external environment from eroding, the bellows can be flexibly adjusted along with the stretching and retraction of the cable, the length requirement of the cable in different use scenarios is met, the physical damage risk of the cable caused by long-term exposure is reduced, and the safety of the charging process is ensured, so that the safety hidden danger such as electric leakage and short circuit caused by the damage of the cable can be reduced, and the system reliability is improved.

The utility model relates to a microwave oven safety protection device based on an acceleration sensor, which comprises the acceleration sensor, a main controller, a power supply module and an alarm, the acceleration sensor is arranged on a shell of a microwave oven, and a signal output end of the acceleration sensor is electrically connected with a data transmission pin of the main controller. A power supply pin of the main controller is connected with the power supply module, a filter capacitor is arranged between a grounding pin of the main controller and a grounding end, and an interruption pin of the main controller is in electric signal connection with the alarm. According to the microwave oven, the acceleration sensor is arranged on the shell of the microwave oven, the acceleration of the microwave oven in all directions can be detected through the acceleration sensor, the inclination angle of the microwave oven is calculated through the main controller, and if the inclination angle is larger than a set threshold value, the alarm gives an alarm, preferably voice alarm. A user can adjust the angle of the microwave oven in time, the microwave oven is prevented from being used in an inclined state, a shell of the microwave oven is prevented from deforming or internal parts are prevented from being damaged, and risks such as electric leakage and short circuit are avoided.

1. The name of the design product: leakage short circuit detector. 2. The use of the design product: instrument for line leakage short circuit detection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the design product: circuit breaker. 2. The use of the design product: overload, leakage short circuit protection for small current circuit. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

An assembly (44) consists of an electrochemical cell (14) of a high-voltage energy storage device (12) and an electrical short-circuiting element (42). The cell (14) has a first pole (22) surrounded by an electrically insulating sealing ring (34) made of a plastic material. The short-circuiting element (42) consists, at least partially, of an electrically conductive material and has a contact section (46) that is permanently in contact with a second pole (24) and a clamping section (48) which, when the cell (14) is at normal operating temperature, is permanently in radial contact with the outer surface of the sealing ring (34) and is subject to a radially inward bias (F). When the cell (14) is at an elevated operating temperature, where the sealing ring (34) is heated above its softening temperature, the clamping section (48) comes into direct electrical contact with the cell extension (26) due to the radial bias (F).The cell (14) is part of a cell assembly (10) which is contained in a battery housing and electrically contacted within the battery housing by a cell contacting system (18).

The invention discloses a grid-connected and off-grid switching device and an electric power system, and belongs to the technical field of electric power. The grid-connected and off-grid switching device comprises a main loop; the main switch is arranged in the main loop; the power supply module is connected with the main loop, and the power supply module is configured to supply power by utilizing electric energy of at least two of a power grid side, a load side and an external power supply interface in a switchable manner; the short circuit detection unit is connected with the load side of the main loop and the power supply module, and is configured to detect impedance between lines of the load side based on power supply of the power supply module and provide a detection signal; the control unit is configured to determine whether a short-circuit fault exists on the load side or not based on the detection signal under the condition that the main switch is switched off; and controlling the main switch to be closed under the condition that the load side has no short circuit fault. Whether the power distribution system at the load side has a short-circuit fault can be monitored before the main switch is closed, and the power grid cannot be disconnected within a certain period of time when the power grid is abnormal through multi-side power supply.

The invention relates to a merged memory die for wafer level testing. A semiconductor wafer includes a plurality of memory dies disposed thereon. The plurality of memory dies are arranged as a plurality of super dies for testing, wherein each of the plurality of super dies includes two or more of the plurality of memory dies. At least a subset of components of the two or more of the plurality of memory dies in each of the plurality of superdies are electrically shorted together to receive a shared test signal from a test equipment during the test.

The invention relates to the technical field of electric power, and discloses a novel T-connection doubling device special for a low-voltage user line. The main wire frame adopts a U-shaped design, an inner side arc-shaped section of the main wire frame is a static clamping end A, and a first movable clamping mechanism is arranged on the inner side of an opening end; the first movable clamping mechanism comprises a sliding seat and a driving clamping piece; the sliding seat can horizontally slide along the inner side of the open end of the main wire frame to realize moving-out and sealing actions, and when the sliding seat moves out, the open end of the main wire frame is open, so that after the main wire frame is assembled on a main cable and is sealed, a driving clamping piece on the sliding seat executes vertical movement, the main cable is clamped, and the main wire frame and the main cable are assembled; according to the invention, the U-shaped main wire frame is matched with a clamping structure with a sliding design, so that the input cable doubling construction is more convenient; the staggered-tooth type locking assembly can solve the problem that a screw rod is loosened due to swinging of the cable, and stable clamping is guaranteed; the insulating protective shell has a waterproof function, adapts to severe working conditions, and eliminates hidden dangers of electric leakage and short circuit.

The utility model discloses a high safety protection measuring switch, which comprises a switch base and a maintenance mechanism, two ends of the outer wall of the switch base are provided with guide mounting grooves, the front end of the switch base is provided with a front panel, and the inner wall of the front panel is provided with a fixing rod. According to the high-safety protection measuring switch, through the arrangement of the switch base and the front panel, the measuring switch has more than ten protection functions such as overload long time delay, short circuit short time delay, short circuit instantaneous time delay, grounding protection, overvoltage, undervoltage, phase loss and zero line breaking, and through the front panel of which the shell is made of plastic, the measuring switch can be prevented from generating electric leakage and other dangers; the plastic is a good electric insulator and can effectively prevent current from passing through, so that electric shock accidents are prevented, the plastic can wrap the internal metal conductor due to the insulating property of the plastic, electric leakage, short circuit or influence of the external environment on the conductivity is avoided, and the use safety of the measuring switch is improved.

A semiconductor wafer includes a plurality of memory dies disposed thereon. The plurality of memory dies are arranged as a plurality of superdies for testing, wherein each of the plurality of superdies comprises two or more of the plurality of memory dies. At least a subset of components of the two or more of the plurality of memory dies in each of the plurality of superdies are electrically shorted together to receive shared test signals from test equipment during the testing.

The utility model provides a cable fault on-line monitoring device, relates to the cable monitoring equipment field, and comprises a device main body and an opening and closing door, the opening and closing door is hinged on one side wall of the device main body through a hinge, and the inner wall of the opening and closing door is fixedly connected with two fixing assemblies. When a cable to be detected needs to be fixed, firstly, the cable to be fixed is placed between the two supporting blocks, then the air cylinder is started, the air cylinder drives the driving frame to move, the driving frame drives the connecting rod to move through the connecting rod while moving, and when the connecting rod moves, the cable to be detected is fixed through the connecting rod. According to the cable fixing device, the supporting block and the clamping block arranged on the supporting block are driven to move towards the cable through the connecting block fixed to the cable fixing device, the cable is fixed through the clamping block, the probability that electric leakage and short circuit faults occur, and the service life of the cable is shortened is reduced, and the maintenance cost and the risk of system faults are reduced.

Method for obtaining information about a transformer (100), wherein the transformer (100) comprises: - a magnetic section (10) with a magnetic core (11) for guiding and focusing a magnetic flux of the transformer (100), - a first coil section (20) with three input coils (21, 22, 23), wherein the three input coils (21, 22, 23) are connected in a delta configuration, and wherein the three input coils (21, 22, 23) are arranged on the magnetic core (11), - a contacting section (40) with three contacting elements (41, 42, 43), wherein each contacting element of the three contacting elements (41, 42, 43) is electrically connected to each of the three delta-connected input coils (21, 22, 23), - a second coil section (30) for transferring energy between the first coil section (20) and the second coil section (30), and wherein the method comprises: - Applying (320) at least one detection signal to the three contacting elements (41, 42, 43) of the contacting section (40) for at least one first combination possibility of three combination possibilities (K1, K2, K3) such that two input coils of the three input coils (21, 22, 23) of the first coil section (20) are electrically connected in parallel and a third input coil of the three input coils (21, 22, 23) is electrically short-circuited, wherein in particular the at least one detection signal has a changing polarity, - Capture (340) at least one investigation signal response of the transformer (100) to the at least one applied investigation signal at least for at least one first combination possibility (K1, K2, K3) of the three combination possibilities (K1, K2, K3), - Determining (360) information about the transformer (100) based on at least one applied detection signal and at least one detected detection signal response, - wherein at least for recording (340) the investigation signal response and for determining (360) information about the transformer (100) a measuring device (200) is used, comprising: i. a signal source unit (220) for generating at least one detection signal, in particular the detection signal with a changing polarity, ii. a connecting device (240) for connecting the signal source unit (220) to three contacting elements (41, 42, 43) of a contacting section (40) of a transformer (100), and wherein the connecting device (240) is configured and / or the signal source unit (220) is configured such that the at least one detection signal is applied to the three contacting elements (41, 42, 43) for at least one first combination of three combinations (K1, K2, K3) such that two input coils of the three input coils (21, 22, 23) of the first coil section (20) are electrically connected in parallel and a third input coil of the three input coils (21, 22, 23) is electrically short-circuited, iii. a detection unit (260) for detecting at least one detection signal response of the transformer (100) to the at least one applied detection signal, iv. wherein the connecting device (240) has at least two connecting lines (241, 242, 243) for connecting the signal source unit (220) to the three contacting elements (41, 42, 43) of the contacting section (40) of the transformer (100), v. wherein a connecting line of the at least two connecting lines (241, 242, 243) for contacting two contacting elements of the three contacting elements (41, 42, 43) of the contacting section (40) of the transformer (100) forms at least section by section a common connecting line (249) and / or is at least section by section split into a first connecting line part (247) and a second connecting line part (248).

A short circuit detection apparatus (1) for detection of an electrical short circuit current flowing in at least one monitored current path comprises an evaluation circuit (8) including at least one programmable or preprogrammed arithmetic unit (8A) adapted to perform at least one arithmetic combination operation, ACOP, on a first voltage, UR, provided by a resistive element (6) of the monitored current path and being proportional to the electrical current, I, flowing via the monitored current path and on a second voltage, UL, provided by an inductive element (7) of the monitored current path and depending on a derivative of the electrical current, dI / dt, flowing via the monitored current path to provide a combined sensor voltage, and including a comparator (8D) adapted to compare the combined sensor voltage provided by the programmable or preprogrammed arithmetic unit (8A) with a preset or an adjustable threshold voltage to generate a short circuit detection signal (SCDS) if the combined sensor voltage exceeds the threshold voltage.