372 results about "Electrical Failure" patented technology

System for monitoring an electrical system of a facility includes one or more local sensing devices, each of which is adapted to be connected to the electrical system of the facility in proximity to a respective load that receives power from the electrical system so as to make local measurements of a voltage across the load continuity measurements of electrical-power presence at one or more points in the electrical system of said facility. A processing unit is adapted to receive and compare the local measurements to reference measurements of the voltage supplied to the facility, in order to detect a fault in the electrical system.

A selectively protected electrical system includes or operates with a power source, a load, a power driver circuit for controllably transferring power from the power source to the load, the power driver circuit being encapsulated in a potting material, and a controller for enabling and disabling the power driver circuit, the controller being un-encapsulated by the potting material. If a contaminant induced electrical fault occurs in the selectively protected electrical system, the electrical fault is more likely to occur in the un-encapsulated controller, such that the selectively protected electrical system is disabled. The contaminant is inhibited from contacting and inducing an electrical fault in the power driver circuit, thus providing for a controlled failure of the selectively protected electrical system.

An electrical fault detector system detects electrical faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop a first signal representing the electrical current flow through the monitored circuit and a second signal representing signal components in a selected frequency range typical of arcing faults, and which exceed a predetermined threshold. The system also detects ground faults in the circuit being monitored.

A grid-connected energy storage system and a method of controlling the energy storage system. In the energy storage system, a normal operation of the energy storage system and the UPS function due to electrical failure may be stably performed even if electrical failure occurs. The energy storage system includes: a maximum power point tracking (MPPT) converter outputting converted power to a first node; a battery storing power; a bi-directional inverter converting power and outputting the converted power to the load, the grid or the first node; a bi-directional converter converting and storing power in the battery and outputting the power stored in the battery to the first node; and an integrated controller controlling the MPPT converter, the bi-directional inverter and the bi-directional converter.

A keypad lockset adapted for deadbolt as well as lever locks, and having as a first embodiment an exterior gear train, an interior gear train, and an electronically controlled clutch for coupling the gear trains when engaged and for uncoupling the gear trains when the clutch is disengaged, so that when the clutch is engaged rotation of an external thumb turn will permit the door latch to be withdrawn and thus to permit opening of the door, and a mechanical override mechanism that can be operated in case of electrical failure, and in which clutch mechanism and the override mechanism both operate through the single, standard 2⅛ inch door preparation hole, or alternatively as a second embodiment, a keypad lockset in which two four-bar mechanical linkages are used in place of gears as means to actuate the clutch, and alternatively to provide for a pass-through override function.

The invention provides an alternating-current brushless generator fault detection method based on an exciter exciting current. The method comprises the following steps: firstly, measuring the direct-current component and each subharmonic amplitude value of the exciter exciting current of a generator set; and then, detecting whether the generator set generates electrical failures or not with a stator winding turn-to-turn short circuit diagnosis algorithm, a rotor winding turn-to-turn short circuit diagnosis algorithm, an exciter fault diagnosis algorithm and a rotary rectifier fault diagnosis algorithm, wherein the electrical failures comprise stator winding turn-to-turn short circuit, rotor winding turn-to-turn short circuit, exciter rotor winding turn-to-turn short circuit, exciter rotor winding interphase short circuit, open circuit of one diode of the rotary rectifier and short circuit of one diode of the rotary rectifier. According to the LabView development fault diagnosis algorithm, various electrical faults can be detected by measuring the exciter exciting current so as to save measurement points, and various invasive sensors do not need to be installed in the generator. The alternating-current brushless generator fault detection method has good instantaneity, and the on-line detection requirement can be satisfied.

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.

A method of diagnosing sensor faults for a heating, ventilation and air conditioning system includes the steps of creating a component model for a specific component within the system. The component model is created through the use of commonly available manufacturing data. Data within the system is input into the component model and compared to calculated and predicted values that are also calculated using the identical component models. Differences between the calculated and actual values is determined and compared to a threshold difference value. If the difference exceeds the threshold value, then a fault is detected. The specific type of sensor fault is determined using probability distribution analysis. Each type of sensor fault produces a different type of statistical deviation from normal distribution. By recognizing these patterns of deviations from the normal distribution, the specific type of fault such as electrical, intermittent or freezing of the sensor can be determined to provide initial information as to the severity and type of remedial action required.

An apparatus and system are disclosed for protecting a power distribution unit from an electrical fault. A fuse interrupts a flow of electrical current in response to the electrical current rising above a current rating of the fuse. A current sensor measures the amplitude of the electrical current and outputs a current amplitude signal. A relay interrupts the flow of electrical current in response to an OFF signal. A fault module receives the current amplitude signal and sends the OFF signal to the relay in response to the amplitude of the electrical current exceeding a threshold value. The relay, the fuse, and the threshold value are selected so that a switching time of the relay is less than an opening time of the fuse for an amplitude of the electrical current between the threshold value and a maximum fault current value, so that the relay prevents the fuse from opening.

The invention belongs to the field of cable electrical failure simulation analysis and particularly relates to a distributive optical fiber temperature measurement based cable electrical failure simulation analysis method. The method comprises building a cable failure model, setting line parameters, determining failure types, performing failure simulation and obtaining the current value during the failure through electromagnetic transient simulation software; building a cable transient thermal path model according to IEC 60287 standards, and calculating the cable transient temperature during the failure; building a cable and temperature measurement optical fiber thermodynamic finite element model through finite element simulation software, and simulating the steady temperature field distribution before the failure and the transient temperature field distribution and changes after the failure of the cable and the temperature measurement optical fiber; obtaining cable electrical failure recognition and location criteria according to the temperature distribution and change rule of the temperature measurement optical fiber in simulation results. According to the method, the problems of poor accuracy, difficulties in experiment and the like during cable electrical failure analysis through temperature measurement optical fiber temperature distribution data are solved. The method has the advantages of being flexible in failure setting, high in work efficiency and the like.

Methods and apparatus are described to detect, measure, and determine the presence of unknown Groundloop currents flowing through unidentified circuit pathways within the wiring system distributed within a portion of a fuselage of an airplane substantially made from fiber-reinforced composite materials to avoid catastrophic failures of the electrical system within such an airplane.

A ceramic multilayer surface-mount capacitor with inherent crack mitigation void patterning to channel flex cracks into a safe zone, thereby negating any electrical failures.

Disclosed herein are apparatus, methods, and systems for monitoring and detection of conditions indicative of an electrical fault for an electrical circuit or system. In one aspect, a central control can simultaneously monitor a plurality of geographically distributed electrical circuits or systems for conditions that have been predetermined to be indicative of an electrical fault or concern, and provide either some communication (e.g., a warning) or instruction (e.g., to terminate power) back to the monitored circuit/system, the owner/operator/user of the circuit/system, or both. The central control can collect, store, mine, and analyze data from the diverse monitoring of plural systems. A knowledge base can be built up over time and used to establish monitoring of the same, other circuits and systems, develop more accurate monitoring and communication of faults or concerns, and account for factors related to normal operation of a circuit or system.

The invention relates to a brake valve for vehicle wire control electro-hydraulic brake and a control method thereof, which comprise a pedal sensing spring, a brake pedal, a mechanical action end, a mechanical action spring and a brake valve core. The brake valve also comprises a pedal position senor, an electronic controller, an electromagnetic coil, and an armature, wherein the pedal position senor is arranged on the pedal, the armature is arranged on a decompressed valve core near the end of the brake pedal, the two sides of the armature are provided with corresponding electromagnetic coils, and the sensor, the electronic controller and the electromagnetic coil are connected by a lead. The senor senses the displacement of the pedal and generates a corresponding signal and sends the signal to the electronic controller to supply corresponding current to coils, and the coils generate an electromagnetic force to control the movement of the brake valve core to realize brake; when an electrical fault occurs, the device can also carry out mechanical brake when a drive tramples the pedal deeply. The brake valve is simple in structure, can realize wire control of the brake pipe fluid pressure, and has the capacity of mechanical backup brake under the condition of the electrical fault.

A process for improving design-limited yield by collecting test fail data, converting to electrical faults, and localizing to physical area on semiconductor die. The steps of identifying an area on a wafer containing a fault to enable the analysis of specific defects, accumulating data suitable for yield monitoring analysis based on pattern test failures logged on scan cells in scan chains on automatic test equipment, and translating scan cell and scan chain failure reports to geometric locations of electrical structures on wafers.

An adapter module for detecting an electronic fault condition in an electronic circuit is disclosed wherein the adapter module may include electrical fault indicator circuitry. In general, the electrical fault indicator circuitry may include ground fault indicator circuitry, line fault indicator circuitry, or ground and line fault indicator circuitry. The adapter module may also include a magnetic device capable of detecting a magnetic field between the electrical fault indicator circuitry and an electrical circuit module. The electrical circuit module may include a switch such as a circuit breaker, a relay, or a magnetically sensitive switch. The magnetic device may include a Hall effect device or a magnetic core.

The invention relates to a current online monitoring integrated system of an on-load tap changer. The current online monitoring integrated system comprises a current acquisition device, a receiving device and a terminal machine, and is characterized in that the current acquisition device is fixedly arranged on the side of the on-load tap changer; the receiving device is arranged on the side of a control room; the current acquisition device is connected with the receiving device through an optical fiber; and the receiving device is connected with the terminal machine through a converting station network. The current acquisition device transmits optical digital signals to the receiving device while electrical high and low voltage side insulation is carried out through an optical fiber; and the receiving device frames the received primary current waveform data and sends to the converting station network, and simultaneously provides analogue signal for outputting. The primary current work waveform of the on-load tap changer is monitored in an online and real-time manner, the running state of the on-load tap changer can be effectively monitored, and electrical failures and mechanical failures of the on-load tap changer are diagnosed in real time; and the system sends out alarms if the on-load tap changer is in failure.

A method of calculating critical area in an integrated circuit design, said method comprising: inputting an integrated circuit design; associating variables with the positions of edges in said integrated circuit design; and associating cost functions of said variables with spacing between said edges in said integrated circuit design; wherein said cost functions calculate critical area contributions as the positions and length of said edges in said integrated circuit design change, and wherein said critical area contributions comprise a measure of electrical fault characteristics of said spacing between said edges in said integrated circuit design.

The invention relates to the field of automotive fault diagnosis, and particularly relates to a fault recording device and method. The fault recording device comprises a gateway processor, a random access memory RAM which is connected with the gateway processor through a CAN bus, and an electric erasable programmable read only memory EEPROM. RAM stores a CAN bus message received by the gateway processor. After the gateway processor receives the CAN bus message with fault information, the CAN bus message which is stored in RAM and contains the fault information is written into EEPROM, and at the same time time information is acquired. The time information is used mark the CAN bus message written in EEPROM. According to the invention, if the whole vehicle has an electrical fault, and especially a sporadic fault, the real-time fault information can be easily and effectively recorded; and the efficiency of troubleshooting is improved.

A mold cased circuit breaker is disclosed that enables a user to easily discern an actually connected state between stationary contactors and movable contactors and forcibly separates a connection therebetween if there arises electrical fault, wherein the circuit breaker comprises: a first isolation link hinged at a lower end thereof to a shaft unit and selectively engaged at an upper end thereof with a lateral surface of a lever; a second isolation link centrally formed with an oblong hole for accommodating a guide pin protruded on a side plate and linked at one end thereof to an upper end of the first isolation link; and an isolation lever adjacently positioned at one end thereof to the other end of the second isolation link, and so positioned at the other end thereof as to selectively engage with a nail, and rotatably mounted at the side plate to rotate the nail by way of operation of the second isolation link.

High impedance fault detection uses, in addition to sensors that measure purely electrical (i.e., current and voltage), molecule sensors are provided in an electrical grid. These molecule sensors are sensitive to the surrounding environment and may detect one or more of a variety of molecules, such as ozone (O₃), combustion gases (carbon monoxide, carbon dioxide and oxygen levels), and odor molecules (ammonia, sulfur dioxide, burned hair/feather, burned proteins, and the like), depending on the type of environmental phenomena that may be expected in a particular location of the sensor(s). These sensors, in combination with conventional electrical sensors, provide a more complete set of data for evaluation and localization of a potential high impedance electrical fault. The use of such sensors is especially useful in confined areas like underground parking lots, substations, and the like.