159results about "Fuses testing" patented technology

The invention relates to the technical field of state monitoring, in particular to an intelligent fuse comprising a monitoring module, and the fuse comprises a data analysis module, a steady state recognition module, a temperature analysis module, a coupling calculation module and a state calibration module. According to the method, time consistency verification and corresponding matching are carried out on temperature and current sampling, abnormal interference is eliminated in a stable current-carrying interval, a continuous sequence is formed, and a definite time relation is established between thermal response and a current-carrying state by combining analysis of accumulated deviation and change turning of the temperature along with time; the abnormal trend of slow evolution is amplified and presented, correction is carried out according to the direction consistency of multi-segment time difference change, progressive features before fusing are recognized in advance, early warning continuity and operation decision reliability are improved, misjudgment is reduced, continuous updating of state evaluation is supported, and stability of a control closed loop is improved.

The invention specifically relates to a standardized fuse fault monitoring and diagnosis system, and relates to the technical field of power system protection equipment monitoring. A signal processing and impedance spectrum calculation module; an intelligent diagnosis and state evaluation module; and a benchmark management and personalized tracking module. According to the invention, controllable micro test signals are actively injected to obtain frequency domain impedance fingerprints, and accurate capture of microscopic degradation is realized; non-intrusive coupling and signal injection are adopted, the topology of a main loop does not need to be changed, the inherent protection characteristic of the fuse is guaranteed, and power frequency interference can be penetrated; the recognition amount of budding faults such as contact oxidation and melt corrosion is improved in advance, and power failure accidents caused by fault expansion are avoided.

The utility model provides a fuse state monitoring circuit and a power distribution system, the fuse state monitoring circuit comprises a fuse connected between a power supply and a load, and the other end of the load is grounded; two ends of the fuse are respectively connected with a first resistor and a second resistor, and the other end of the first resistor and the other end of the second resistor are connected in series with a third resistor to be grounded after being connected; the fuse protection circuit further comprises a voltage sampling circuit which is connected with the voltage sampling end of the third resistor through a sampling channel, and the state of the fuse is monitored according to the sampling voltage of the voltage sampling circuit to the third resistor. According to the invention, state monitoring and voltage monitoring of the fuse are realized by differentiating voltages at two ends of the fuse and connecting the resistors in series, voltage detection of a circuit can be realized, state monitoring of the fuse can also be realized, and the fuse monitoring circuit has the advantages of simple structure and low cost.

A degradation determination device determines whether each of a first opening / closing device and a fuse provided on a power path is in a degraded state. The power path has a positive electrode-side power line and a negative electrode-side power line. The first opening / closing device and the fuse are provided on the negative electrode-side power line. The degradation determination device is provided with a first potential detection unit that detects a first potential at one end of the first opening / closing device and a second potential at the opposite end thereof, a second potential detection unit that detects a first potential at one end of the fuse and a second potential at the opposite end thereof, and a control unit that determines whether each of the first opening / closing device and the fuse is in a degraded state, based on a potential difference between the first and second potentials.

The invention discloses a high-voltage equipment fault judgment method based on voltage abnormity, and relates to the technical field of high-voltage equipment fault property judgment, and the method comprises the steps: determining whether an undervoltage or overvoltage condition occurs or not through monitoring the voltage level of each phase voltage of a voltage transformer; if the undervoltage or overvoltage condition occurs, determining voltage abnormity indication information corresponding to different conditions; and determining high-voltage equipment fault information according to the voltage abnormity indication information. The fault property can be quickly judged according to the voltage abnormal information in combination with other fault phenomena, so that the fault searching efficiency is improved, and the situation that fault downtime is prolonged due to misjudgment, even the fault range is expanded, and greater loss is caused to a user is prevented. And safe and stable operation of equipment power supply can be ensured.

The invention discloses a new energy high-voltage direct current protection device comprehensive test platform, and relates to the technical field of new energy high-voltage direct current system core protection device test, and the platform comprises a power supply and energy storage module which is used for converting a 380V alternating current into a stable and adjustable direct current and storing the stable and adjustable direct current as an energy source required by a high-voltage large-current test, different test voltage requirements are met through series-parallel topology switching; and the power control and load simulation module is used for controlling on-off and adjustment of current in the test loop. By adopting the modular combination design of the super-capacitor energy storage unit, the adjustable pulse inductor and the load module, the comprehensive compatibility of high-voltage direct-current protection devices such as a relay and a fuse in various test scenes such as short circuit resistance, electric service life and limit on-off is realized, meanwhile, the system can work only by being powered by a conventional 380Vac laboratory, and the test efficiency is greatly improved. The method does not depend on an industrial high-voltage power grid or a special transformer, greatly reduces the equipment deployment threshold, and improves the test response efficiency.

The invention discloses a traction power supply system voltage mutual fuse monitoring method, system and device, relates to the technical field of traction power supply systems, and solves the problems that the existing traction power supply integrated automation system cannot monitor the continuous fusing process of a fuse, resulting in that the PT voltage is lower than the actual operation voltage, and the safety is poor. According to the technical scheme, the method is characterized in that according to the power supply characteristics of a traction substation, the operation condition of a voltage transformer of the substation is automatically recognized, and a fuse monitoring method of the voltage transformer is automatically selected according to the operation condition of the voltage transformer; and monitoring and early warning of incomplete fusing of the voltage transformer fuse are realized.

The invention relates to the technical field of power system detection, in particular to a fuse wire breakage detection method and system for a single-phase isolation lightning protection device. According to the method, firstly, a complex state formed by two states is separated out, and the characteristics of the complex state are focused. The method comprises the following steps: firstly, counting abnormal moments and constructing an abnormal range, analyzing electrical characteristics in a power grid from the range, analyzing an amplitude reduction trend under each electrical dimension in the abnormal range, quantizing amplitude abnormal parameters, and comparing the amplitude abnormal parameters among three phases to obtain the abnormal amplitude of the power grid. And obtaining the disconnection probability according to the frequency change amplitude of the three-phase power supply in the abnormal range. And obtaining the overall broken line probability by using the broken line probabilities under the two electrical dimensions to judge the broken line of the fuse. According to the method, the power grid resonance state and the fuse disconnection state can be effectively distinguished through feature extraction under different electrical dimensions in a complex state and feature comparison among all items, and accurate detection of fuse disconnection is achieved.

The invention discloses a transformer iron core insulation fault distinguishing method based on electromagnetic acoustic cross-modal fusion, which comprises the following steps: acquiring iron core grounding current, UHF electromagnetic signals and acoustic signals, fusing the acquired iron core grounding current, UHF electromagnetic signals and acoustic signals to obtain fusion features, processing the UHF electromagnetic signals and acoustic signals to obtain a transformer iron core insulation fault distinguishing result, and distinguishing the transformer iron core insulation fault distinguishing result. And respectively obtaining a final fault coordinate and an acoustic positioning coordinate, carrying out signal-to-noise ratio weighted fusion on the final fault coordinate and the acoustic positioning coordinate to obtain a fault three-dimensional coordinate after final fusion, processing the fusion feature and the fault three-dimensional coordinate after final fusion, and outputting a final diagnosis report. The cross-modal attention mechanism is introduced, the purified iron core current, the UHF electromagnetic signal and the acoustic signal are deeply fused, the iron core and insulation fault distinguishing accuracy is remarkably improved, and the fault diagnosis precision and stability are enhanced.

The present invention relates to a method for checking the switch-off capability of an electronic fuse which is arranged between a voltage source and a consumer. The method includes monitoring a voltage at the consumer, switching the electronic fuse to a non-conductive state, and checking whether the voltage at the consumer drops to a threshold voltage within a set time. The present invention also relates to a system for checking the switch-off capability of an electronic fuse. The system includes a voltage source, a consumer, an electronic fuse between the voltage source and the consumer, a voltage measuring device to measure the voltage at the consumer, and a checking unit. The checking unit monitors the voltage at the consumer via the voltage measuring device, switches the electronic fuse to a non-conductive state, and checks whether the voltage at the consumer drops to a threshold voltage within a set time.

The invention relates to the technical field of ship power systems, in particular to a device and method for monitoring and troubleshooting components of a cooling system of a marine range extender, and solves the problems that an existing system is difficult in troubleshooting and low in reliability. According to the method, the high-voltage and fault states of the system are judged by obtaining working parameters after the system is awakened, low-voltage component self-inspection is conducted under specific conditions, the working states of a water pump and a fan are judged by calculating step-down DCDC output power, self-inspection or monitoring is triggered according to the electric control temperature of a motor, and positioning is conducted by means of an indicator lamp when a fault occurs. The device comprises a step-down DCDC, an RCU controller, a man-machine interaction control screen and the like which work cooperatively. Intelligent monitoring and rapid troubleshooting of cooling system components are achieved, the ship operation reliability is improved, the maintenance cost is reduced, and stable operation of the range extender is guaranteed.

The application relates to the technical field of photovoltaic equipment detection, in particular to a testing device for photovoltaic engineering protection equipment and a method thereof, which comprises a stand, a photovoltaic frame, a photovoltaic panel group arranged on the photovoltaic frame, a plurality of overcurrent testing groups arranged on one side of the top of the stand; the photovoltaic panel group comprises a plurality of photovoltaic panels installed on the photovoltaic frame, a turnover group installed between the middle part of the stand and the photovoltaic frame and a servo cylinder; the servo cylinder drives the turnover group to drive the photovoltaic frame to turn over and unfold; the overcurrent testing group comprises a fuse connected in series with a row of photovoltaic panels, a current regulator and a short-circuit generator connected in parallel to the electrodes of the current regulator. The turnover group driven by the servo cylinder is linked with the photovoltaic frame, the inclination angle of the photovoltaic panel is adjusted and the photovoltaic panel is stored, the lower support frame and the upper support frame are cooperatively driven by the servo cylinder, the photovoltaic frame can be unfolded to 30 DEG to 90 DEG to receive light or be folded to reduce the occupied space, and the photoelectric output characteristics of the photovoltaic panel in a real scene are simulated.

An in-vehicle device of the present invention includes a fuse and an upstream capacitor having one end connected to a connection node upstream of the fuse in a current path of current that flows through the fuse. One end of a downstream capacitor is connected to a connection node downstream of the fuse in the current path. A determiner determines whether or not the fuse is blown based on an upstream voltage that passed through the upstream capacitor and a downstream voltage that passed through the downstream capacitor.

This application provides a monitoring system based on an intelligent drop-out fuse, including an insulating support, a fuse tube, a fuse wire, an upper contact mechanism, and a lower contact mechanism. The insulating support includes a skirt section and insulating ends located on the upper and lower sides of the skirt section. A secondary cavity is provided inside the upper insulating end. The skirt section includes two main skirts connected vertically, and a main cavity is located at the connection point of the two main skirts. A voltage and current sensor is installed in the secondary cavity. A metering chip and a wireless communication module are installed in the main cavity. Several communication ports are provided on the outside of the main cavity. The metering chip is electrically connected to the voltage and current sensor, the wireless communication module, and the communication ports. This application can collect voltage and current signals, calculate and output operating parameters through the metering chip, measure the active and reactive energy of each phase, and then transmit the data to a remote location via the wireless communication module. Through real-time monitoring, it can respond to faults more quickly, reduce the damage to equipment caused by faults, and reduce on-site maintenance work.

The present application relates to the field of power distribution system equipment state monitoring, in particular to a high-voltage fuse array operation monitoring method and system based on an Internet of Things architecture, which pre-constructs an array topology graph containing thermal neighbor relationships and heat dissipation area division in the commissioning phase; in the operation phase, the current environmental reference temperature is estimated based on the low-load fuse set in the array in each sampling period, and the expected temperature of each fuse is calculated by combining the current-carrying self-heating temperature rise and the heat dissipation condition offset, then the group environmental disturbance and isolated point degradation are distinguished by neighbor deviation synchronization rate, and finally the alarm is output after multi-cycle continuity confirmation. The present application can absorb the group temperature rise caused by the change of cabinet ventilation and environmental drift, significantly reduce the false alarm rate, and at the same time improve the recognition sensitivity to early degradation of the melt. The present application uses the array collective behavior as a self-referencing benchmark instead of a fixed threshold, which improves the early degradation detection capability and suppresses false alarms.

The embodiment of the invention provides a data processing method, an insurance life prediction method and device, equipment, a medium and a program product. The method comprises the following steps: determining information of a target current interval where a sampling current is located based on the sampling current of a power supply loop of the battery system in a sampling period; according to the information of the target current interval where the sampling current of the adjacent sampling period is located, the duration parameter of the information of each target current interval is counted, and the duration parameter is used for indicating the duration; the target current interval information and the duration parameter thereof are used for determining the service life of the fuse in the power supply loop. The method is used for improving the accuracy of predicting the insurance life.

The present application provides a fuse state detection circuit, which includes a bias current generating circuit, a current subtractor, and a processing module; the bias current generating circuit is used to provide an adjustable bias current; the current subtractor is used to generate a fuse state detection current, the fuse state detection current being the difference between the rated current provided by the current subtractor and the bias current provided by the pre-stage bias current generating circuit; the second output end of the processing module is used to electrically connect to the fuse under test; when the state of the fuse under test is in a burned state, the output end of the processing module outputs a logic high level; when the state of the fuse under test is in an unburned state, the output end of the processing module outputs a logic low level. This allows for better detection of the state of the fuse under test, thereby resolving the problem in existing solutions of difficulty in controlling the magnitude of the fuse state detection current.

The invention relates to a small load isolation switch device for a bus system. The load disconnector device includes a fuse housing compartment for a fuse. A simple and small sized method for detecting fuse failure within the containment compartment is provided. Fuse faults are indicated by galvanic isolation signals.

This invention discloses a fault detection system for output fuses of a substation battery bank, comprising at least a maintenance and recovery circuit, a control circuit, and a signal circuit. The maintenance and recovery circuit detects the status of the positive and negative fuses, and, under the control of the control circuit, reconnects the two ends of the blown positive or negative fuse after it has blown. The control circuit controls the maintenance and recovery circuit according to the status of the positive and negative fuses. The signal circuit acquires and transmits the status information of the positive and negative fuses. This invention also discloses a corresponding method. Implementing this invention allows for real-time detection of whether the battery bank output fuses are functioning correctly, and automatically restores the connection between the battery bank and the DC bus when an abnormality is detected, providing convenience, timeliness, and improved safety.

According to some aspects of the present disclosure, a power distribution apparatus includes one or more input terminals, each input terminal being connectable to a respective power source; one or more output terminals, each output terminal being connectable to one or more power devices; and one or more electrical paths, each electrical path connecting a respective one of the one or more input terminals and a respective one of the one or more output terminals, and including one or more solid state fuses. According to another aspect of the present disclosure, an aircraft includes a power source; an electric propulsion system; and a power distribution device connected above for delivering electrical energy from the power source to the electric propulsion system.

Electrical measurement devices, systems, and methods receive user input(s) selecting an electrical element from a list of electrical elements, each electrical element of the list of electrical elements having an impedance associated therewith. Impedance data of the electrical element's impedance is accessed from a data storage location. Voltage drop across an in-circuit electrical path passing through the electrical element is measured in response to a first conductive probe element of an electrical measurement device being in contact with a first terminal of the electrical element and a second conductive probe element of the electrical measurement device being in contact with a second terminal of the electrical element. Amperage of the electrical element is determined by the processor of the electrical measurement device from the voltage drop and the impedance, and a signal is transmitted to one or more indicators for indicating a status of the electrical element.

Electrical testing methods, systems, and kits are capable of powering, via a first power supply, an electrical system, performing, via a first electrical device, selective detection of at least two parameters of the electrical system, and detecting, via sensor(s) of a second electrical device, presence and / or flow of a parameter from a second power supply to the electrical system to derive parasitic draw of the electrical system. Memory settings of the electrical system are preserved via the second electrical device while the parasitic draw is derived. User input(s) selecting an electrical element of the electrical system are received via a third electrical device that stores impedance data of electrical elements. The third electrical device determines voltage drop across an electrical path passing through the electrical element, which the third electrical device uses to determine, in combination with the impedance identified by the impedance data, amperage of the electrical element.

The invention specifically relates to a high-voltage fuse residual life evaluation method and system based on real-time monitoring, and relates to the technical field of high-voltage power equipment monitoring and life evaluation. A feature vector construction module; a differential topology analysis module; a second-order trend verification module; and a life evaluation module. According to the invention, targeted hardware model selection adapts to a high-voltage electromagnetic and high-potential isolation environment, the current and temperature acquisition units both adopt an isolation design and an anti-interference sensor, and a photoelectric isolation technology is combined to ensure that data acquisition is safe and reliable; meanwhile, current-temperature time sequence deviation is eliminated through thermal lag compensation, load fluctuation interference is stripped by means of a normalized thermal-electric coupling coefficient, systematic errors such as environment temperature change and sensor drift are counteracted through differential topology analysis, and a single-phase aging fault is positioned.

Provided is a shut-off device for a vehicle, the device being capable of operating so as to further draw out the durability performance of a switch.　The shut-off device (1) comprises a first switch (33A) that switches an electrical power path (11), which is a route for transmitting electrical power based on a power supply unit (10), between a conductive state and a shut-off state. The shut-off device (1) comprises a control unit (15) that executes a degradation determination process for comparing a resistance value (R) of the first switch (33A) with a resistance threshold value (Th1). When the resistance value (R) is greater than or equal to the resistance threshold value (Th1), the control unit (15) determines that the first switch (33A) is in a degraded state, and sends a notification of the degraded state to the outside.

The utility model discloses a vibration-resistant rectifier unit protection fast fuse micro-motion indicator board, which relates to the technical field of rectifier units, and comprises an indicator board body and a plurality of leads, the indicator board body is used for being installed at a detection part of a rectifier unit, the indicator board body is provided with a working circuit, and the working circuit is used for reflecting the working state of a rectifier unit fast fuse. The indicator board body is provided with a plurality of first terminals electrically connected with the working circuit; one end of the wire is used for being inserted into the terminal and fixedly connected with the two faces of the first terminal in a welding mode, the other end of the wire is provided with the second terminal, and the second terminal is used for being detachably and electrically connected with the rectifier unit. The defects of the prior art in the aspects of structure, material, process and the like are eliminated, the maintenance process is simplified, and stable operation of rectifying equipment is ensured.

The invention provides a fuse monitoring system, method and device, a power distribution system and a vehicle, and the system comprises a current detection unit which is configured to detect the current flowing through a target fuse; the voltage detection unit is connected with the target fuse, and the voltage detection unit is configured to detect the current voltage at the two ends of the target fuse; and the comprehensive control unit is connected with the current detection unit and the voltage detection unit, and the comprehensive control unit is configured to determine the health state of the target fuse according to the current current and the current voltage.

In one embodiment, a system for determining appropriate ratings of one or more fuses within a fuse housing is provided. The system includes at least one sensor configured to measure operational data associated with the one or more fuses, and a controller coupled to the at least one sensor. The controller is configured to perform operations including receiving the operational data from the at least one sensor, comparing the operational data with predetermined values associated with the one or more fuses, and generating a fuse message based on the comparison. The fuse message includes information indicating whether the one or more fuses are associated with appropriate ratings.

The present application belongs to the field of automobile electronics, and provides a kind of automobile wire harness fuse wire current carrying capacity matching test method and system, comprising: establishing standardization pulse loading profile, constant current test is extended to cover the composite dynamic test sequence of peak thermal shock and average thermal accumulation;Collect fuse thermal accumulation integral value and wire insulation layer multi-point temperature, introduce three-dimensional evaluation index, identify thermal response asynchronous condition;Pulse peak and duty cycle are gradually increased, respectively, approach the limit of wire transient temperature rise and fuse thermal accumulation melting boundary, determine the safe matching interval by cross comparison;According to the safe matching interval, divide the matching level, select the optimization for asynchronous risk and overheating priority failure combination respectively, and feed back the optimization result to the selection specification.The test distortion problem caused by the asynchronous thermal response of fuse and wire under dynamic pulse current is solved, and the matching reliability and test accuracy of automobile electrical system are improved.

The application discloses a high-voltage alternating-current fuse current characteristic testing device, which comprises a control console, a device cavity is formed in the bottom of the back of the control console, a first mounting frame and four second mounting frames are arranged in the device cavity, a base is slidably arranged at the bottom of the inner frame of the first mounting frame and the second mounting frames, the base in the first mounting frame is used for mounting an alternating-current network isolation transformer, the alternating-current network isolation transformer is arranged in the first mounting frame, a connecting plug and a series plug are arranged, the connecting plug or the series plug is plugged into the socket in the adjacent second mounting frame, and thus the alternating-current network isolation transformer can be arranged in a circuit or separated from the circuit, when the alternating-current network isolation transformer is arranged in the circuit, series connection is realized, and when the alternating-current network isolation transformer is separated from the circuit, parallel connection is realized, so that the existing problems are solved.