158 results about "Electrical malfunction" patented technology

A circuit breaker assembly includes a housing, a trip mechanism, a vent channel, and a chamber. The trip mechanism is positioned within the housing can causes a movable contact to separate from a second contact in response to detection by the circuit breaker assembly of an electrical fault. The vent channel is formed in the housing and positioned to exhaust gas and debris produced as the movable contact separates from the second contact during the electrical fault to an aperture in the housing. The chamber has a chamber housing coupled to the housing adjacent the aperture such that the chamber receives the gas and debris exiting the aperture.

The invention discloses an on-line monitoring and fault diagnosis method of a motor based on a "correct tree" model. The on-line monitoring and fault diagnosis method of the motor based on the "correct tree" model comprises the sequential steps of data acquisition, data transmission, establishment of a motor internal model, establishment of the "correct tree" model, motor state learning and faultdiagnosis. The on-line monitoring and fault diagnosis method of the motor based on the "correct tree" model has the advantages that voltage data and current data of the motor are collected online in real time, an operation mode of the motor is learned independently by adopting a machine learning algorithm, after the "correct tree" model of the motor under normal operation conditions is established, an actual operation condition of the motor is compared with the "correct tree" model, so that mechanical faults and electrical faults of the motor are timely found in early stages of the faults andalarm is carried out, the unplanned outage of equipment is reduced, and the productivity is improved; and accurate fault diagnosis and maintenance decision-making information are offered with a low cost, requirements of technical levels of users are not high, the application scope is broader than a vibration and current characteristic analysis system commonly used in motor fault diagnosis, and themethod can be applied to monitoring of motors and electric generators.

An electrical fault detection system includes an underground transformer unit having an enclosure and an electrical busbar element extending from the enclosure, and an acoustic sensor apparatus operatively coupled to an external structure of the enclosure or the electrical busbar element. The acoustic sensor apparatus is structured to: (i) detect an acoustic signal within the enclosure, (ii) analyze the detected acoustic signal and determine whether the detected acoustic signal is indicative of an electrical fault within the enclosure using an event time correlation (ETC) algorithm, and (iii) responsive to determining that the detected acoustic signal is indicative of an electrical fault, output a message indicating that a fault has been detected.

The invention provides a low-voltage transformer area line fault positioning system based on intelligent circuit breakers. The system comprises a low-voltage transformer area distribution network anda monitoring center, wherein the intelligent circuit breakers have selectivity when encountering an electrical fault, and can freely set the tripping time or select different tripping times; the intelligent circuit breakers are used for setting the current-level circuit breaker close to the fault point to be tripped and opened preferentially when a line fault occurs between the two levels of intelligent circuit breakers, and sending the fault information to the monitoring center; and the monitoring center is used for acquiring the fault point information through an intelligent distribution transformer terminal TTU, sending an instruction to control the upper-level intelligent circuit breaker and the lower-level intelligent circuit breaker of the fault point to be opened, controlling an interconnection switch to be connected at the same time, supplying power to a fault-free area, and isolating the fault area. According to the invention, fault positioning of a distribution line of a public transformer area of the national power grid can be realized, the fault points of the transformer area are isolated, power supply is recovered outside the isolation area, the fault response speed isimproved, the fault influence is reduced to the minimum, the equipment is reasonably put into operation, and the equipment loss is reduced.

The invention discloses a numerical simulation method for a cable fire caused by an electrical fault in a tunnel. The method includes the following steps of , according to the structure of a cable tunnel and the laying condition of cables in the tunnel, establishing a physical model of the cable tunnel; determining an initial fire source model causing a cable tunnel fire according to the positionand the fault type of the fault cable in the cable tunnel; inputting the initial fire source model, the laying condition of the cable in the cable tunnel and the like into a FLASH-CAT model; the real-time heat release rate of the fire source in the tunnel can be obtained; establishing a fire source model of the cable tunnel fire; directly importing the fire source model into fluid dynamics calculation software FDS; and setting material characteristics and boundary conditions of the cable tunnel model in the FDS, dividing grids, and performing numerical calculation to obtain time-varying rulesof temperature, smoke concentration, flame propagation, CO concentration and the like in the cable tunnel, thereby realizing risk assessment of the cable tunnel fire.

Electrical fire risks and consumer safety are major concerns driving regulators worldwide to implement more stringent electrical code and enforcement. While there are many commercially available protective devices available, none affords total protection, and they are made and classified only to protect circuits from specific or limited number of faults. This invention is about an apparatus, system and method for protection of electrical circuits and consumers from literally all known electrical faults in direct current (DC) and alternating current (AC) single and multi-phase systems such as and including arc faults, ground and leakage faults, surge, overload, short circuit, glowing connections, miswired connections, overvoltage, undervoltage and phase-loss. Said apparatus, system and method come in the form of or in a housing as a circuit breaker, receptacle, convenience outlet, attachment plug, equipment controller, a circuit, or a system integrated with another system, device or apparatus.

An electrical back box of galvanized metal or plastic with a barrier mounted in its interior. This barrier is the support for a low voltage transformer and the means of separating the low and high voltage wiring chambers. Knockouts provide access into these tow chambers for the required electrical wires. Retainer slots located in the interior of the box at the mounting end and at the opposite end provide and insertion point for wire springs. These wire springs are attached to a chime or any type of equipment that may utilize this backbox. When thrust into the retention slots, these springs provide a pulling force that snug the equipment up to the opening of the box. When this back box and transformer are used only for a source of low voltage power then there are two different types of covers that will cover the opening either flush or surface mounted and these make it electrically safe. These covers are mounted by the same wire springs method and are of plastic. When a metal cover is required then it will be supplied with a means of bonding to the equipment ground in the box thus providing electrical fault protection. When different size transformers are needed they can be mounted to the removable barrier but will require the mounting hole in the barrier to be individually sized.

In a pressure sensor chip (10), an extension (42) is provided on a lower glass (40) and a signal receiving portion (50) of a conductive layer is formed from a surface (42A) of an extension (42) to an upper surface (30B) of an upper glass (30). Accordingly, the signal receiving portion (50) does not touch a circuit substrate when the pressure sensor chip (10) is mounted to the circuit substrate and the like, thereby preventing electric failure such as noise pickup of the signal receiving portion (50). Further, since the signal receiving portion (50) is formed by the conductive layer, no particular space for receiving electric potential from a diaphragm is necessary, thereby enabling size reduction of the pressure sensor chip (10). Since an anodic-bonding electrode (83) is disposed on a border (62) and is cut and removed in separating as the pressure sensor chip (10), visual check is not obstructed and contamination by being peeled-off can be prevented.

The invention relates to a water leakage induction device, a battery pack and an electric automobile. The water leakage induction device comprises a processor, a water leakage induction cable, a firstvoltage detection device and a power supply. The water leakage induction cable comprises a first induction cable and a second induction cable. The first voltage detection device is also connected with the processor. The positive electrode of the power supply is connected with the first end of the first induction cable. The second end of the first induction cable is connected with the first end ofthe second induction cable. The second end of the second induction cable is connected with the negative electrode of the power supply. A first voltage measurement device is connected in parallel withthe first induction cable. When the first induction cable and the second induction cable in the battery pack are shorted by the water drops leaking into the battery pack, the processor can judge thesituation of water leakage and the position of water leakage according to the change of the voltage value measured by the first voltage measurement device so that the maintenance personnel are enabledto rapidly and accurately clean the water drops and eliminate short circuit of the battery pack and other electrical fault.

An improved emergency aircraft oxygen respirator for passenger use in an aircraft providing a mask attached to a passenger by a head strap, the mask having a facial conforming inner liner forming an airtight seal to each various passenger, the mask further defining an oxygen line connection, a valve operated expired breathing opening, and at least one inlet filter to remove toxic fumes, chemical vapors and smoke during a fire or electrical malfunction in the airplane, the oxygen line connection engaging the plane's existing chemical oxygen generation system, replacing the oxygen mask for passengers in a plane, the replacement respirator deploying within the passenger compartment of the airplane in the same manner as the oxygen masks being replaced.

The embodiment of the invention provides a wire harness electrical fault detection method and device and a controller. The method comprises the steps of receiving first fault information sent by a driving chip, and starting timing; according to the timing time when the driving chip sends the first fault information and the preset time, determining whether a fault containing a first fault type occurs in a first target wire in the at least one first wire or not; sending a channel activation signal to the driving chip, so that the driving chip sends a pulse test signal to a wire harness in real time and provides feedback of second fault information; receiving the second fault information in real time and counting the feedback times of the second fault information provided by the driving chip;and according to the feedback frequency and a preset number, determining whether a fault containing a second fault type occurs in a second target wire in the at least one second wire. According to the method provided by the embodiment of the invention, the problem that electrical faults of a wire harness on a vehicle cannot be timely and effectively diagnosed in the prior art can be solved.

The invention relates to a device (1) for protecting at least one electrical system component (2, 3) of a vehicle electrical system. The device comprises at least one semiconductor switch (4), which is connected to the at least one electrical system component (2, 3) in an electrically conductive manner. Additionally, a circuit (8) is provided, which is connected to the semiconductor switch (4) in an electrically conductive manner and which comprises a detection unit (9) for detecting an electrical malfunction of the vehicle electrical system and an activation unit (14) for activating the semiconductor switch (4). The device (1) furthermore includes a control unit (20), which is communicatively connected to at least the circuit (8). According to the invention, the device (1) is configured to switch the semiconductor switch (4) into a first safe state, in which the semiconductor switch (4) is switched off, as a function of the detection of an electrical malfunction, and furthermore to selectively switch the semiconductor switch into the first safe state or into a second safe state, in which the semiconductor switch (4) is switched on, as a function of at least one predetermined vehicle state. The invention further relates to a method for protecting at least one electrical system component (2, 3) of a vehicle electrical system.

The invention provides a modal analysis method for solving complex electrical faults. The method is characterized by comprising the following steps: (1) carrying out high-dimensional degradation processing on electrical data by adopting an algorithm taking intrinsic orthogonal decomposition as a core; and (2) carrying out matching analysis, specifically including energy proportion analysis, visualdisplay analysis on the change of a modal coefficient along with time steps, and Lissajous graph analysis matched with frequency modal analysis and the modal coefficient. The method has the advantages that fault parameter information can be obtained as much as possible, and a high-quality data analysis basis is provided for an advanced algorithm; 2, an information algorithm with a mature processis provided for electrical fault data analysis; and 3, powerful decision information is provided for an electrical big data platform.

The invention belongs to the technical field of switch cabinets, and particularly relates to an anti-falling switch cabinet capable of being opened in four directions. The switch cabinet comprises a cabinet body and a cabinet door, and after one side of the door is opened, if a person presses a pressing rod on the other side, the cabinet door can be detached; in order to prevent the situation, anadjusting mechanism is designed to prevent the situation that people for saving trouble completely detach but not install the cabinet door, and the detaching difficulty of the cabinet door is increased through the designed adjusting mechanism. According to the invention, a wire winding rod is designed to prevent the wires in the switch cabinet from being snapped after being subjected to downward pulling force of the cabinet body after the switch cabinet is used for a long time or installed loosely and falls off, so that electrical faults or short-circuit fire disasters are avoided; and after the cabinet body falls off, the cabinet body pulls the insertion rod through the pull rope, so that the insertion rod moves upwards to lose swing limitation between the wire winding rod and the fixed support lug, the wire winding rod can swing downwards, the electric wire wound on the wire winding rod falls off through a lower plate, and the defect that the length of the falling electric wire of the switch cabinet is not enough is overcome.

A braking system for vehicles may have a control unit for two brake groups operatively connected to electromechanical actuators for each brake group through a relative piloting device. Each control unit may be powered by a power source and being galvanically isolated from other power sources. Each control unit may be programmed to implement, via a piloting device, a standard braking strategy in case of detection of a standard operation of each brake group and a fault braking strategy, if it detects an electrical fault of one or more of the brake groups.

The invention belongs to the technical field of vehicle fault diagnosis, and discloses a clutch fault diagnosis method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining a current voltage value of a pressure sensor in real time when a preset diagnosis triggering condition is met; converting the current voltage value into a current pressure value; judging whether or not the current pressure value is larger than or equal to semi-binding-point pressure; when the current pressure value is larger than or equal to the semi-binding-point pressure, opening a clutch, and affirming that there is no electrical fault occurring to the clutch. According to the clutch fault diagnosis method, when it is detected that the current pressure value exceeds the semi-binding-point pressure, it is judged that a vehicle may be in danger, fault response measures are taken, and the situation that the clutch is opened with brute force, and then the vehicle enters alimp mode is avoided.

An electric fault signaling device comprises a difference current sensor, a processing member (16) comprising a fault current detection member (21), and an electric fault signaling member (17, 18). The processing member comprises a member (29) for detecting voltage of a control input end (30). When a first detection signal (Fd1) represents threshold overshoot, and when the voltage detection member (29) detects that voltage supply at the control input end is stopped, a signal processing member (22) provides a first signal processing signal (IS1) to signal members (23, 24, 25). The method comprises signaling (58) positioned electric fault when detecting overshoot (55) of a first threshold and detecting that the voltage supply is stopped.

A module IC package structure having a metal shielding function includes a substrate unit, an electronic unit, a shielding unit, and an insulative unit. The substrate unit includes a substrate body and at least one grounding pad disposed on the substrate body. The electronic unit includes at least one electronic module disposed on the circuit substrate and electrically connected to the circuit substrate. The shielding unit includes a metal shielding layer formed on an external surface of the at least one electronic module, and the metal shielding layer contacts the at least one grounding pad. The insulative unit includes an insulative layer formed on an external surface of the metal shielding layer. Hence, the module IC package structure can be used to prevent electrical malfunction induced by short-circuit due to the design of forming the insulative layer formed on the external surface of the metal shielding layer.

The invention discloses a system and a method for wireless networking of modules inside a robot. The system comprises a main control unit, a servo control subsystem, a power supply management subsystem, a movement control subsystem and a wireless communication unit, wherein the movement control subsystem comprises an expression control subsystem. According to the system and the method for wireless networking of the modules inside the robot, a wireless communication technique of short distance and low power consumption is adopted to network the modules inside the robot, a communication mode of limited cables can be replaced, electric faults caused by long-term abrasion and bending of cables can be eliminated, and thus the security and the reliability of the robot can be improved. In addition, any nodes of the wireless network can perform data communication, and when modules are added or removed, the wireless network has an automatic remediation function and is short in network time delay, relatively high in response speed, low in power consumption, high in communication speed, good in reliability and high in security.

A method for automatic protection coordination in a power system network comprises identifying radial source-to-load paths and fault protection devices in the source-to-load paths, for a portion of the power system network to be coordinated. Device settings data for fault protection devices are retrieved, including multiple preconfigured settings for some devices. Fault currents for each of multiple possible electrical faults in said portion of the power system network are predicted, and a selectivity check for each pair of fault protection devices that are adjacent to one another in an identified radial source-to-load path is performed, for each of one or more of the predicted fault currents, taking into account multiple preconfigured settings for remotely controllable fault protection devices. A combination of settings for remotely controllable fault protection devices that minimizes selectivity violations among the pairs is selected, and necessary change-setting commands are sent to remotely controllable fault protection devices.

The invention relates to a variable frequency motor fault monitoring system, and belongs to the field of fault diagnosis. According to the system, an electrical fault characteristic index, a vibration fault characteristic index and a temperature fault characteristic index of a motor are correspondingly calculated by collecting a dynamic current signal, a bearing vibration signal and a bearing temperature signal of motor equipment; and the vibration fault characteristic index and the temperature fault characteristic index are respectively substituted into a dynamically configured alarm threshold model function, a vibration alarm threshold and a temperature alarm threshold are solved, and an electrical alarm threshold is set by adopting the national standard and is used for early warning judgment. According to the invention, various types of signals of the variable frequency motor are utilized to carry out fault characteristic index discrimination, and a national standard threshold value is adopted to carry out alarm judgment on the electrical fault characteristic index; and for the vibration and temperature fault characteristic indexes, the threshold value calculated by the alarm threshold value model function is adopted to carry out alarm judgment, so that the alarm accuracy of equipment is improved, and the rate of missing alarm and false alarm is reduced.