8196results about "Circuit interrupters testing" patented technology

The present disclosure relates to articles (and the manufacture thereof) that use electrical energy to heat a material to form an inhalable substance, the articles being sufficiently compact to be considered “hand-held” devices. In certain embodiments, the articles can particularly be characterized as smoking articles. The smoking article can be adapted to detect the status of a cartridge portion of the smoking article. The smoking article includes a control body portion having a control body engagement end, wherein the control body portion houses a control component and a power source therein. The article further includes a cartridge body portion that has a cartridge body engagement end configured to removably engage the control body engagement end of the control body portion. The cartridge body portion houses a consumable arrangement and a heating connection operably engaged therewith comprising at least one heating element and a fusible link.

A circuit tracer for use with circuit breakers equipped with sensors capable of sensing at least a change in the power consumption of the circuit and transmitting, preferably wirelessly, such information. The information is received directly or indirectly by a circuit tracer having a display, the display showing all the circuit breakers equipped with the sensors. Upon changing the load of an electricity outlet, such as a wall outlet, a light source, HVAC, pump, electrical machinery, etc., the sensor equipped circuit breaker provides an indication of such power or current consumption change to the circuit tracer. This allows the user of the circuit tracer to associate on the circuit tracer the circuit breaker with the specific electricity outlet. The association information may be saved on a central server or database for future use.

A ground fault detector and interrupter for a photovoltaic (PV) energy conversion system, method and apparatus are disclosed. In an exemplary embodiment, the system includes first and second inputs adapted to couple to a first and second rails of a PV array. An inverter is configured to convert DC power generated from the PV array to AC power. A ground fault detector and interrupter, which is coupled to the first and second rails and to the inverter, is configured to detect ground fault conditions in the PV array and to decouple the PV array from the remaining portion of the PV energy conversion system upon such detection. A known signal is coupled to the input of the ground fault detector and interrupter, and then sensed at the output of the ground fault detector and interrupter to determine whether components of the ground fault detector and interrupter are operating properly.

The present invention is directed to a circuit and method for self-testing a protection device for use in an AC power distribution system. The device is configured to be coupled between an AC power distribution system and at least one load. The method includes the step of introducing a simulated ground neutral fault during a first predetermined half cycle half cycle of the AC power. An attempt is made to detect the introduced simulated grounded neutral fault during the first predetermined half cycle half cycle. A fault condition is signaled if the introduced simulated grounded neutral fault is not detected within a predetermined period of time.

An arc fault detector for detecting electric power lines includes a sensor for sensing the derivative of the current on the electric power line, a converter circuit for converting the derivative of the line current into first and second signals, the first signal responsive to positive step transitions of arc fault current, and the second signal responsive to negative step transitions of arc current, and a temporal detector for signaling the presence of an arc fault when one of the first and second signals follows the other within a predetermined time, or window, and in which a sequence of one of the signals following the other signal occurs in a second predetermined interval of time.

A circuit protection device connected between two lines of an AC power source self checks for an introduced simulated ground fault every half cycle during a period when a trip SCR cannot conduct. If the self check fails, the device is tripped on the next half cycle of different phase. Possible responses to the self check failure include lighting an indicator lamp and locking out the device reset mechanism.

The system makes it possible to monitor various electrical variables by using a simple structure at low cost with ease and with high reliability by a circuit breaker which jointly includes a current transformer to detect current, a transformer to detect voltage, and a zero-phase current transformer to detect leakage current, in addition to the switch controller to perform the basic function of the circuit breaker. Moreover, the system also provides a function to display various measured values, obtained as described above, by a display unit that can be detached and installed separately from the measuring section to display data sent in digital form by data transmission.

The invention discloses a device for detection of mechanical characteristics and diagnosis of faults of a high-voltage circuit breaker, and relates to a switch device in the technical field of electric power. The device for detection of the mechanical characteristics and diagnosis of the faults of the high-voltage circuit breaker comprises a power module, an AD conversion module, a USB/RS232 communication module, a computer, a signal processing module, a control module, a collection module and a USB/RS232 communication module. The device for detection of the mechanical characteristics and diagnosis of the faults of the high-voltage circuit breaker integrates a plurality of paths of collection signals which comprise a loop current of an energy storage motor of the high-voltage circuit breaker of a spring operating mechanism, a coil current of a switch-on releaser, a coil current of a switch-off releaser, vibration signals of the high-voltage breaker, and information content of the angular displacement and the speed of rotation of a main shaft, local information of the mechanical characteristic state of the high-voltage circuit breaker is obtained by collecting information content with different forms, analysis is carried out on the local information through the signal processing module of the device, and the local information is combined, superposed and deduced to generate judgment information of the mechanical characteristics of the high-voltage circuit breaker. The device for detection of the mechanical characteristics and diagnosis of the faults of the high-voltage circuit breaker is simple in structure, convenient to use and stable in monitoring.

The invention discloses a testing and verifying system appropriate for an intelligent transformer substation and a verifying method. The system comprises an upper computer and an embedded system lower computer that comprises a collecting plate, a signal plate, a data plate and four sub-plates of a synchronization plate. The signal plate, the data plate and the synchronization plate are supplied with power by an external adapter DC5V. The synchronization plate provides synchronization pulse signals to other sub-plates. Ethernet of the upper computer is connected with the signal plate of the upper computer, the intelligent transformer substation, and a process layer, an interval layer and a station layer network of a digital transformer substation by an RJ45 twisted-pair through an industrial switchboard. The testing and verifying system appropriate for the intelligent transformer substation is convenient to detect and verify the electrical capacity of current intelligent transformer substation and digital transformer substation and improves the debugging speed of the intelligent transformer substation and digital transformer substation greatly so as to provide good technical assurance to construction of the intelligent transformer substation and digital transformer substation and lay a solid foundation for safe and stable operation of the intelligent transformer substation and digital transformer substation.

An electrical touch sensor is provided. The electrical touch sensor includes: a touch detection part having at least one touch pad and generating a first signal having a same delay time regardless of whether the object is in contact with the touch pad and a second signal having a varied delay time according to whether the object is in contact with the touch pad; and a contact signal generator generating a contact signal in response to the delay time-difference between the first and second signals. Therefore, it is possible to increase operation reliability by precisely determining whether the object is in contact with the pad, when the object has charge accumulation characteristics more than a certain level, although its conductive is insufficient. In addition, the electrical touch sensor can determine whether the object is in contact with the pad using only one pad to reduce a layout area of a product.

Frequency of judgment of welding of relays is increased to increase likelihood of early detection of welding. It is determined that a battery 22 is not being recharged or discharged when a vehicle speed V of an electric vehicle is approximately 0 and a brake pedal 54 is pressed, and a switching element of an inverter 24 is controlled to be switched to discharge electric charges which are stored in a capacitor 44. After discharging, relays 30, 32 are turned off, and voltages RV1, RV2 between the terminals of the relays 30, 32 are detected by voltmeters 40, 42 to judge whether either of the voltages RV1, RV2 has a threshold value RVref (approximate value 0) or less. When it is so determined, it is judged that the relays 30, 32 are welded, and an LED 70 is illuminated.

A microwave energy delivery and measurement system, including a microwave energy source configured to delivery microwave energy to a microwave energy delivery device, a measurement system configured to measure at least one parameter of the microwave energy delivery device and a switching network configured to electrically isolate the microwave energy source and the measurement system. The measurement system is configured to actively measure in real time at least one parameter related to the microwave energy delivery device.

The invention discloses a testing device and a testing method of flexible direct-current transmission modular multilevel converter (MMC) converter valve operating. Large current needing to be checked is produced through energy exchange between two groups of valve module submodule capacitors and a load electric reactor, accurate alternating current-direct current overlaying current stress can be obtained through respective adjustment of alternating component amplitude and phase difference of output voltage of two valve modules, and adjusting modes are simple and flexible. A charging source is only used for building working voltage of two sample valve submodules at the beginning of the test, energy supplementation power sources are used for building working voltage of two auxiliary valves at the beginning of the test, only less active loss is supplemented in the test process later, the two energy supplementation power sources respectively share one half of system loss, and requirements for power capacity of a test circuit are greatly lowered. In addition, the two energy supplementation power sources can offset harmonic waves of grid-connected current of the two energy supplementation power sources through difference of connection modes of transformers of the two energy supplementation power sources to a great degree, and harmonic wave pollution to power grids is reduced.

The invention provides a universal circuit breaker mechanical fault diagnosis method based on feature fusion of vibration and sound signals. The method includes steps of 1, collecting machine vibration signals and machine sound signals during an engaging and disengaging process of a universal circuit breaker; 2, adopting an improved wavelet packet threshold value denoising algorithm for denoising; 3, adopting a complementary total average empirical mode decomposition algorithm for extracting a plurality of solid mode function components reflecting state information of engagement and disengagement actions of the circuit breaker from the denoising signals; 4, determining the number Z of the solid mode function components; 5, calculating the energy ratio, the sample ratio and the power spectrum entropy as three types of features; 6, adopting a combination core principal component analysis method for performing dimension reduction on a feature sample with unified three types of features of the vibration and the sound signals and obtaining M principle components; 7, establishing a related vector machine based sequence binary tree multiple classifier model.

The invention discloses a diagnostic circuit and a diagnostic method for detecting electric vehicle high-voltage relay fault. The circuit comprises a battery pack for providing power and a driving force for the electric vehicle and a controller for controlling on and off of an electric vehicle switch element. Two ends of the battery pack are connected with an overall electrical device; a main positive relay K+ is serially connected between the positive electrode of the battery pack and the overall electrical device; two ends of the main positive relay K+ are parallelly connected with a relay R and a pre-charging relay Kp; a main negative relay K- is serially connected between the negative electrode of the battery pack and the overall electrical device; both the battery pack and the overall electrical device are respectively connected with the controller; the controller is used for detecting voltage at two ends of the battery pack, voltage at two ends of the overall electrical device, and voltage at the negative end of the battery pack and the positive end of the overall electrical device. Thus, no peripheral circuit needs to be added, the state of the relay is judged only through carrying out cross detection on voltage at the relay end, whether the relay has a fault can be timely detected, remedial measures can be taken timely, the method is simple, convenient and feasible, and no detection risk is added.

The invention provides a detection method and a detection system of an intelligent relay protection device. Aiming at the situation that compared with the prior art, dynamic properties of the relay protection device cannot be detected effectively in an intelligent substation spot, and starting from the feature of sharing of digitalization and informatization of an intelligent substation secondary system, the detection method which regards a digit simulation system as a data source and regards synchronous working of a plurality of digitized relay protection testers is provided and the detection system of the intelligent relay protection device is constructed. Various operating situations which probably happen in a transformer substation can be simulated according to an actual electric topological structure of an intelligent substation and device parameters construction and simulation models in a lab, simulating calculation can be conducted, transient test data which have higher similarity with the actual operating situations can be achieved by transforming, the transient test data can be output in the intelligent substation spot in a playback mode, and detection of the dynamic properties of the relay protection device and checkout work of protection definite value can be carried out.

A method and system to monitor a high voltage power relay operable to conduct electrical power from a source to a load, during each vehicle shutdown event. The system includes the electrical relay with a resistive device, electrically connected in parallel circuit, a controllable electrical load device, and a sensing device. A controller is connected to the electrical relay and each sensing device, and operable to identify a low electrical load condition at the load. The controller commands the load to operate at a known current draw level, commands the relay open, and monitors a change in power to the load device when the relay is commanded open. The electrical relay is functioning properly when the change in electrical power to the load exhibits a known profile over time, when the electrical relay is controlled to the commanded-open position.

The invention provides a relay state detection method of an electric vehicle high-voltage system. The method comprises the step of determining whether a relay is in a normal work state or in a fault state based on the voltages at both ends of the relay and/or the coil current of the relay according to the switch-on and switch-off time sequences of the relay in the electric vehicle high-voltage system. Correspondingly, a relay state detection device is provided. The method and the device can be used for monitoring the relay state to clearly determine whether the relay is in the work state or in the fault state, thereby well controlling the output of high-voltage power and ensuring the personal safety as well as the safety of electric vehicles.

The invention provides a monitoring method and a monitoring system for a touch switch. The monitoring method comprises the following steps of: (1) during switching on the touch switch or switching off the touch switch, respectively measuring voltages of two ends of the touch switch relative to the same reference electrical level; (2) comparing the voltages of the two ends of the touch switch relative to the same reference electrical level; and (3) judging whether the touch switch is switched on or switched off normally or not according to a comparison result. By using the method and the device of the monitoring method and the monitoring system of the touch switch, the touch switch can be confirmed whether to be switched on normally or switched off normally through judging the voltages of the two ends of the touch switch relative to the same reference electrical level after the touch switch in a high voltage system of an elective vehicle receives a switching-on command or a switching-off command. The invention provides the effective and reliable monitoring method and the motoring system of the touch switch, thus the touch switch can be correctly judged whether to be switched on normally or switched off normally.

Provided are a high-voltage circuit breaker opening and closing time online monitoring apparatus, a smart multi-dimensional big data analyzing expert system for a high-voltage circuit breaker in a power grid, and methods therefor. The opening and closing time online monitoring apparatus includes a circuit breaker opening and closing events database, a circuit breaker opening and closing time online monitoring module, and a human machine interaction interface. Data in the circuit breaker opening and closing events database is derived from a SCADA and a measurement and control apparatus thereof, a circuit breaker phase selection opening and closing apparatus, a relay protection apparatus and a relay protection information system, and a fault recording apparatus and a fault recording system of each of a substation and a converter station. The circuit breaker opening and closing time online monitoring module includes various modules, and cloud databases for such online monitoring are created.

A system for monitoring a circuit breaker that includes a monitoring device in electronic communication with the circuit breaker and a receiving device located separately from the monitoring device. The monitoring device receives data from the circuit breaker and wirelessly transmits at least a portion of the data such as one or more phase currents measured from a network which the circuit breaker protects, an ambient temperature within the circuit breaker, and/or data relating to a trip condition of the circuit breaker. The receiving device receives the transmitted data and displays all or a portion thereof. The monitoring device also includes a display that displays all or a portion of the data.

The invention discloses an automatic testing system and method for a relay protection measuring and controlling device. The system and the method can automatically test the flexible configuration of a use case, and can synchronously modify the fixed value of a to-be-tested device in the testing process according to the configuration of the test use case. If the to-be-tested device is in a measured and controlled state, a relay protection monitoring and controlling device tester is used for adding amount; device information is backward read through a communication interface of the to-be-tested device and is compared with that at amount adding time; a complete close loop test is conducted on the to-be-tested monitoring and controlling device. Parameters and configuration information information are sent to the relay protection monitoring and controlling device tester through an upper computer. The communication amount and the switch amount of the to-be-tested device are increased. Communication messages are uploaded to the upper computer. A series of closed loop tests are conducted. A testing report is automatically generated. The system and method have a testing precision rectifying section, improve testing precision, are wide in application range, and have good application prospects.

In a circuit arrangement for monitoring an electronic switch provided for controlling a load and current flown through the load during turn-on intervals for driving the load, the switch has a substantially linear resistance behavior during parts of its turn-on state and the operating point of the switch is located in this part of the turn-on state during the load control. The circuit arrangement comprises a modulation signal generator for generating a modulation signal for modulating the load current flowing through the electronic switch. A first voltage measuring device measures the first voltage drop across the electronic switch caused by the modulation signal. A second voltage measuring device measures the voltage drop across the electronic switch caused by the load current, and an evaluation unit determines the load current from the modulation signal and the first and second voltage drops.