98results about "Contact testing/inspection" patented technology

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.

A vehicle charging system for an electric vehicle includes a housing having a mating end for mating with a charging component and a charging terminal held by the housing connected to a power conductor to form a power transmission line. The vehicle charging system includes a charging controller for controlling vehicle charging along the power transmission line. The vehicle charging system includes a charging sensor assembly coupled to the charging controller monitoring charging status of the vehicle charging system and generating a charging output signal. The charging sensor assembly detects an arc signature from an arc event and generates an arc output signal. Based on the arc output signal, the charging controller generates a primary control output to perform a primary protective action including shutting down the charging operation and generates a secondary control output to perform a secondary protective action.

A vehicle charging system for an electric vehicle includes charging terminals held in a housing being connected to corresponding power conductors to form power transmission lines. The vehicle charging system includes a charging controller for controlling vehicle charging along the power transmission lines. The vehicle charging system includes an arc detection antenna coupled to the charging controller. The arc detection antenna is positioned proximate to the power transmission lines for detecting arc signatures along the power transmission lines from an arc event. The arc detection antenna transmits an arc output signal to the charging controller based on detection of the arc signature.

The present invention relates to a circuit breaker manipulator for performing a high-speed cycle blocking operation, comprising: a frame part composed of a magnetic body of which the centers of the front and rear surfaces are penetrated such that a front through-hole and a rear through-hole are formed therein and which has an upper plate having an upper through-hole formed in the center of the upper portion thereof, and a lower plate having a lower through-hole formed in the center of the lower portion thereof; a plunger part which is disposed to be spaced apart from the outer lower portion of the lower plate, and which has a plunger having a first through-hole penetrating the center thereof; a first coil part, which is inserted through the front through-hole or the rear through-hole so as to be arranged to penetrate the frame part, has a first coil having a second through-hole penetrating the center thereof, and applies, to the plunger part, magnetic force in the direction corresponding to current flowing in the first coil; and a second coil part, which has a second coil having a third through-hole penetrating the center thereof, is disposed to be spaced apart from the outer lower portion of the lower plate, is disposed to be spaced apart from the upper portion of the plunger part, and applies, to the plunger part, magnetic force in the direction corresponding to current flowing in the second coil.

A dropout recloser is capable of in accordance with its operating programming after a predetermined number of fault interrupting operations, e.g., 1, 2, 3 or more but typically 3, to drop out of a cutout and hang freely in a hinge contact of the cutout providing sectionalization with an observable visible gap. The recloser includes fault interrupting and reclosing components, a drop out mechanism and a controller. The drop out mechanism may include a bi-stable actuator to affect fault interrupting operation and dropout operation. The device may include motion limiting structures. The recloser may have a number of operating modes or sequences.

A contactor detection circuit is disclosed. [Solution] The contactor detection circuit is configured such that the output terminal of a reference voltage generation circuit is connected to the inverting input terminal of the comparator and electrically connected to the two fixed contacts of the contactor in order to input a reference voltage V1 to the inverting input terminal of the comparator. The output terminal of a sampling circuit is connected to the common-mode input terminal of the comparator and the output terminal of a waveform generator is connected to the input terminal of the sampling circuit in order to input a sampling voltage V2 to the common-mode input terminal of the comparator. A periodically changing voltage signal V3 is input to the sampling circuit. When the contactor is open, the sampling voltage V2 output by the sampling circuit is a periodic waveform, causing the comparator to output a periodic square wave signal. When the contactor is closed, the sampling voltage V2 output by the sampling circuit is higher than the reference voltage V1, causing the comparator to output a high level.

The invention relates to a method for determining the thermal life (LD (T)) of an electromechanical switching device (10), which is connected into a load current path (14), comprising the following steps: acquiring a time sequence of temperature measurements (Tm) recorded at a temperature measurement point (P) of the switching device (10); -forming a time series of calculated values calculated on the basis of the time series of acquired temperature measured values (Tm); -determining a trend in the formed time series of calculated values; -estimating the lifetime of the switching device (10) on the basis of the determined trend.

The invention relates to a method for evaluating a switching event in an electromechanical switching device connected to a load current path, comprising the following steps: acquiring a temperature-current intensity value pair (Tm, Im), the temperature-amperage value pair has a temperature measurement value (Tm) of the temperature measured at a temperature measurement point (X) of the switching device (10) and a amperage measurement value (Im) of the current (I) flowing through the load current path measured concurrently with the temperature measurement value (Tm); -recording said pairs of temperature-amperage values acquired at different points in time; comparing at least one temperature-amperage value pair at a point in time before the switching event with at least one temperature-amperage value pair at at least one point in time after the switching event; and evaluating the switching event based on the comparison.

A method for monitoring contactor health of an electrical contactor of an electrical device, the electrical contactor being switchable in a switching event between an open state and a closed state or between a closed state and an open state, in response to a switching event command, the method includes determining a current value indicative of a current flowing in the closed electrical contactor at a time proximate the switching event, attributing a percentage of a total contactor life estimate to the switching event based on the current value, determining an updated percentage remaining contactor life estimate by subtracting the percentage of the total contactor life estimate from an initial percentage remaining contactor life estimate, and outputting the updated percentage remaining contactor life estimate.

The invention relates to a computer implemented method for determining an estimated travel curve of an interrupter unit of a high or medium voltage device, including the steps of—receiving a reference travel curve for the interrupter unit of the high or medium voltage device, wherein the reference travel curve describes relative positions of arcing contacts of the interrupter unit with regard to each other over time during an opening and / or closing operation of the interrupter unit, receiving auxiliary switch data representing transition timepoints of an auxiliary switch A and transition timepoints of an auxiliary switch B of the interrupter unit during opening and / or closing operation, wherein the auxiliary switch data has been acquired by performing multiple opening and / or closing operations of the interrupter unit, and determining an estimated travel curve by taking the received reference travel curve and the received auxiliary switch data into account.

A vehicle charging system (10) for an electric vehicle (14) comprises a housing (102) with a plug end for connecting to a charging device (40) and a charging connector (107) held by the housing and connected to a current conductor (105) to form a current transmission line. The vehicle charging system includes a charge controller (140) for controlling the vehicle charging along the current transmission line. The vehicle charging system includes a current sensor assembly (34) coupled to the charge controller, which monitors the current transmitted via the current transmission line and generates a current output signal (178) that is transmitted to the charge controller. The current sensor assembly is configured to detect an arc signature from an arcing event and generates an arc output signal (188) that is transmitted to the charge controller based on the arc signature detection.

A recloser including a circuit interrupter having a first contact and a second contact movable relative to the first contact between a closed position, which allows current to pass through the circuit interrupter, and an open position, which separates the contacts and prevents current from passing through the circuit interrupter. The recloser further includes an actuator coupled to the circuit interrupter, the actuator including a plunger coupled to the second contact for closing and opening the circuit interrupter. The recloser further includes a sensor board including a first position sensor and a second position sensor, the first and second position sensors configured to generate signals indicative of a position of the plunger. The recloser further includes a controller configured to determine a velocity of the plunger based on a first signal generated by the first position sensor and a second signal generated by the second position sensor.

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 invention relates to a method for checking the condition of a vacuum interrupter unit (1) comprising: - Detection of X-ray radiation (9) emitted by the vacuum interrupter unit (1), - Generating an image (12) of at least one radiation source (R1, R2, R3, R11, R12, R13) of the vacuum interrupter unit (1) on a projection plane based on the detected X-ray radiation (9), wherein at least one radiation source is represented by at least one image point (B1, B2, B3, B11, B12, B13) in the image (12), - Capturing an X-ray spectrum (19, 20, 21, 22, 23) of the X-ray radiation (9) in which at least one pixel (B1, B2, B3, B11, B12, B13), and - Checking the condition of the vacuum interrupter unit (1) based on the captured X-ray spectrum (19, 20, 21, 22, 23). Furthermore, the invention relates to a testing device (7) and a test system (8).

A method for determining a surface regeneration parameter of a contact surface of an electrical contactor, such as a contactor in a vehicle, is provided. The surface regeneration parameter is representative of a regeneration of the contact surface of the contactor taking place during a closed state of the contactor. The method includes the following steps: determining a load current flowing through the closed contactor, determining a duration in which the contactor is closed, and determining the surface regeneration parameter based on the determined load current and the determined duration.

The present application provides a system and method for online monitoring of the contact resistance of a break of a circuit breaker. The system includes a main circuit formed by connecting a circuit breaker, a shunt, a load, and a power supply; a voltage transducer is connected in parallel at the break of the circuit breaker, the voltage transducer includes an auxiliary protection circuit connected in parallel at the break of the circuit breaker, the auxiliary protection circuit includes a first branch and a second branch each composed of a switch and a first resistor, the switches are connected to the break of the circuit breaker, ends of the two first resistors away from the break are each connected in parallel with a second resistor and a protection element, and end ports of the first branch and the second branch are used to collect a voltage value at the break of the circuit breaker; a current transformer is connected in parallel with two ends of the shunt, and the current transducer is used to monitor a current value at the break of the circuit breaker; and the contact resistance of the break is obtained by calculation on the basis of the voltage value and the current value being monitored. The present application can achieve online monitoring of the contact resistance of a break of a circuit breaker, and prevent the voltage transducer from burning due to over-voltage caused by breaking at the break.

The present invention relates to the field of low-voltage electrical appliances, in particular to a comprehensive perception universal circuit breaker. An intelligent controller of a control system includes an MCU circuit. A circuit breaker self-inspection module of the intelligent controller includes a current sampling circuit. The current sampling circuit includes a transformer disconnection detection circuit for detecting a connection state of an air-core transformer; an iron core transformer working current detection circuit for detecting an output current of an iron core transformer; a magnetic flux tripping unit disconnection detection circuit for detecting a connection state of a magnetic flux tripping unit of an execution unit; an auxiliary power supply voltage detection circuit for detecting an input state of an auxiliary power supply which supplies power to a short-circuit protection mechanism; an energy storage readiness detection circuit for detecting an energy storage state of the energy storage operating mechanism; and a tripping state detection circuit for detecting a tripping state of the universal circuit breaker. The circuit breaker self-inspection module of the comprehensive perception universal circuit breaker can perform self-inspection on the working state of the universal circuit breaker, and ensure reliable and stable working of the universal circuit breaker.

In an embodiment, a switching device (1) comprises a switching unit (2) having electrical contact surfaces (21, 22), voltage metering circuitry (3), a current sensor (4) and a computing unit (5). The voltage metering circuitry (3) is connected to the first end (23) and the second end (24) of the switching unit (2) and is configured to measure a voltage drop (10) across the switching unit (2). The current sensor (4) is connected to the first end (23) or the second end (24) of the switching unit (2) and is configured to measure the current (11). The computing unit (5) is connected to the voltage metering circuitry (3) and the current sensor (4) and is configured to determine the contact resistance (6) of the contact surfaces (21, 22) of the switching unit (2) by means of the voltage drop (10) and the current (11). The calculation unit (5) is configured to determine contact wear of the contact surfaces (21, 22) based on the contact resistances (6) of the contact surfaces (21, 22).

The application discloses a phase selector switch, which has multiple phases, each phase comprising a vacuum interrupter, a magnetic control mechanism and a transmission mechanism, the vacuum interrupter comprising a moving contact and a stationary contact, the magnetic control mechanism comprising a moving iron core and a stationary iron core, and the transmission mechanism comprising a connecting rod assembly, a breaking spring and an overtravel spring; the first end of the connecting rod assembly is rigidly connected to the moving contact, the second end of the connecting rod assembly is connected to the moving iron core in a follow-up mode, and the second end of the connecting rod assembly passes through the stationary iron core and the moving iron core, and the breaking spring and the overtravel spring are arranged in the middle section of the connecting rod assembly. The application has the beneficial effect that the connecting rod assembly passes through the magnetic control mechanism, so that an overtravel distance is formed between the connecting rod assembly and the magnetic control mechanism, and the overtravel value of the contact overtravel spring after the factory delivery can be observed and measured, and the wear condition of the vacuum interrupter contact in the phase selector switch can be found in time in the later period.

A vehicle charging system (10) for an electric vehicle (14) includes a housing (102) having a mating end for mating with a charging component (40) and a charging terminal (107) held by the housing connected to a power conductor (105) to form a power transmission line. A vehicle charging system includes a charge controller (140) for controlling vehicle charging along a power transmission line. The vehicle charging system includes a charging sensor assembly (146) coupled to the charging controller that monitors a charging state of the vehicle charging system and generates a charging output signal. The charge sensor assembly detects an arc characteristic from an arc event and generates an arc output signal. Based on the arc output signal, the charge controller generates a main control output to perform a main protection action including turning off the charge operation, and generates an auxiliary control output to perform an auxiliary protection action.

A vehicle charging system (10) for an electric vehicle (14) includes charging terminals held in a housing (102) and connected to respective power conductors (105) to form power lines (166, 168). A vehicle charging system includes a charge controller (140) for controlling vehicle charging along a power transmission line. A vehicle charging system includes an arc sensor assembly (160) coupled to a charge controller. The arc sensor assembly includes a diversity antenna (162) for detecting an arc characteristic along the power transmission line from an arc event. The diversity antenna transmits an arc output signal to the charge controller based on the detection of the arc characteristic.

The invention relates to a method for determining the thermal endurance (LD(T)) of an electromechanical switch device (10), having the following steps: - detecting a temperature measurement value (T_m) at a measurement point (P) of the switch device (10); - in the event that the temperature measurement value (T_m) is less than or equal to a defined permissible temperature (T_zul) of the switch device (10), ascertaining the thermal endurance (LD) as the defined maximum endurance (LD_max) of the switch device (10) and reducing the endurance (LD) in accordance with the time that has elapsed; - in the event that the temperature measurement value (T_m) is greater than the permissible temperature (T_zul) and less than or equal to a defined maximally permissible temperature (T_max) of the switch device (10), said maximally permissible temperature being greater than the permissible temperature (T_zul), ascertaining the thermal endurance (LD) using a temperature-time characteristic curve (Ki, Si); and - in the event that the temperature measurement value (T_m) is greater than the maximally permissible temperature (T_max) of the switch device (10), ascertaining the thermal endurance (LD) according to a rule defined for this event.

The invention relates to a method for estimating a current state (22) of an electrical contact (12) of a switchgear (10) by an electronic computing device (16), comprising the steps of: providing a temperature model (18) of the electrical contact (12) by the electronic computing device (16); providing an aging model (20) of the electrical contact (12) by the electronic computing device (16); estimating a temperature of the electrical contact (12) depending on at least one parameter (24) of the electrical contact (12) by the temperature model (18); estimating the aging of a contact element (14) of the electrical contact (12) depending on at least the estimated temperature by the aging model (20); and estimating the current state (22) of the electrical contact (12) depending on the estimated aging of the contact element (14) by the electronic computing device (16). Furthermore, the present invention relates to a computer program product, a computer-readable storage medium, as well as to an electronic computing device (16).

The present invention discloses a contactor detection circuit. The contactor detection circuit comprises: a comparator; a reference voltage generation circuit, whose output end is connected to the inverting input end of the comparator, for inputting a reference voltage V1 to the inverting input end of the comparator; a sampling circuit electrically connected to two static contacts of a contactor and its output end connected to the in-phase input end of the comparator, for inputting a sampling voltage V2 to the in-phase input end of the comparator; and a waveform generator, whose output end is connected to the input end of the sampling circuit, is used to input a periodically changing voltage signal V3 to the sampling circuit. When the contactor is in an open state, the sampling voltage V2 output by the sampling circuit is a periodic waveform, causing the comparator to output a periodic square wave signal; when the contactor is in a closed state, the sampling voltage V2 output by the sampling circuit is higher than the reference voltage V1, causing the comparator to output a high level. The present invention does not require the use of isolated power supplies and isolated operational amplifiers, nor does it require the use of MCUs or the development of specialized software, greatly reducing costs.

The invention discloses a transmission-level high-voltage environment-friendly vacuum circuit breaker latch unbuckling prevention and control adaptation method and structure, and belongs to the technical field of high-voltage electrical equipment. According to the invention, a multi-stage damping device is used for vibration energy management and isolation, a main and auxiliary double-buckling-point structure and a mass tuning damper are used for latch structure dynamic optimization, and self-adaptive intelligent control is realized based on a distributed sensor network and a signal analysis technology. Establishing a mapping database of voltage grades and vibration characteristics to complete working condition self-adaptive matching; the corresponding structure comprises a vibration energy management system composed of multi-stage damping devices, an optimization latch with a main and auxiliary double-buckling-point structure, a self-adaptive control system composed of a distributed sensor network and an intelligent controller, and a parameter self-adjusting working condition matching system. Through combination of vibration energy multi-stage management, structure dynamic optimization, intelligent control and working condition matching, transmission of vibration energy to the latch mechanism in the closing process is effectively inhibited, and latch buckling reliability is remarkably improved.

The invention relates to a method for determining the thermal endurance (LD(T)) of an electromechanical switch device (10) which is inserted into a load current path (14), having the following steps: - detecting a time series of temperature measurement values (Tm) which are recorded at a temperature measurement point (P) of the switch device (10); - forming a time series of calculated values which are calculated on the basis of the detected time series of temperature measurement values (Tm); - ascertaining a trend in the formed time series of calculated value; and - estimating the thermal endurance of the switch device (10) on the basis of the ascertained trend.

To provide an arc detection method for a vehicle charging system of an electric vehicle.SOLUTION: A vehicle charging system (10) for an electric vehicle (14) includes charging terminals carried by a housing (102) and connected to corresponding power conductors (105) to form power transmission lines (166, 168). A vehicle charging system includes a charge controller (140) for controlling vehicle charging along a transmission line. A vehicle charging system includes an arc sensor assembly (160) coupled to a charge controller. An arc sensor assembly includes a diversity antenna (162) for detecting an arc signature on a power transmission line caused by an arc event. The diversity antenna transmits an arc output signal to the charge controller based on detection of the arc signature.SELECTED DRAWING: Figure 7

The application relates to the technical field of circuit breakers, in particular to a passive built-in temperature measuring circuit breaker and a method, which comprises a moving contact and a static contact matched with the moving contact, further comprises a driving rod connected with the moving contact through multiple groups of elastic structures, the driving rod is connected with an operating mechanism of the circuit breaker, the operating mechanism can drive the driving rod to drive the moving contact to move towards the static contact, and the driving rod and the moving contact move relatively after the moving contact contacts the static contact; in the closing process, the moving contact and the static contact are connected first, and then the arc-shaped contact piece contacts the moving contact, while in the opening process, the arc-shaped contact piece and the moving contact are separated first, and then the moving contact and the static contact are separated, so that the electric arc generated between the moving contact and the static contact in the closing and opening processes can be effectively avoided from interfering with the temperature measuring function, the stability of temperature-related signal acquisition and transmission is ensured, and the problem of false early warning is avoided.

The invention relates to a method for determining a contact wear of a switching device (1) comprising an anchor (2) that is moved by means of a magnetic drive (3) in a tripping event, at least one fixed contact (7) and at least one moveable contact (8) mechanically connected to the anchor (2). The method comprises the steps of: - determining a contact time (10) when fixed contact (7) touches the moveable contact (8), - determining an inductance (11) of the magnetic drive (3) at the contact time (10), - determining the contact wear by comparing an initial inductance (12) with the inductance (11) at the contact time (10). Furthermore, a switching device (1) is specified.