166results 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.

The invention discloses a phase selection switch which has multiple phases, each phase comprises a vacuum arc-extinguishing chamber, a magnetic control mechanism and a transmission mechanism, the vacuum arc-extinguishing chamber comprises a moving contact and a static contact, the magnetic control mechanism comprises a moving iron core and a static iron core, and the transmission mechanism comprises a connecting rod assembly, an opening spring and an overtravel spring; the first end of the connecting rod assembly is rigidly connected with the moving contact, the second end of the connecting rod assembly is connected with the moving iron core in a follow-up mode, the second end of the connecting rod assembly penetrates through the static iron core and the moving iron core, and the opening spring and the overtravel spring are both arranged in the middle section of the connecting rod assembly. The beneficial effects of the invention are that the connecting rod assembly passes through the magnetic control mechanism, so that the over-travel distance is formed between the connecting rod assembly and the magnetic control mechanism, the over-travel value of the contact over-travel spring after leaving a factory can be observed and measured, and the wear condition of the vacuum arc-extinguishing chamber contact in the phase selection switch can be conveniently found in time in the later stage.

An abnormality detection device includes: an acquisition unit configured to acquire a state of a relay that is connected to an instrument to be monitored and controls opening and closing of a circuit to which the instrument is connected; a detector configured to detect an abnormality of the instrument on the basis of the state of the relay or a change in the state of the relay; and a notifying unit configured to notify a user of the abnormality detected by the detector.

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 invention discloses a double-moving-contact vacuum circuit breaker structure driven by double electromagnetic repulsion mechanisms and a control method of the double-moving-contact vacuum circuit breaker structure. In the double-moving-contact vacuum circuit breaker structure, a vacuum arc extinguish chamber is provided with a first moving contact and a second moving contact which act independently; the first electromagnetic repulsion mechanism is directly connected to the first moving contact through a first pull rod, the second electromagnetic repulsion mechanism is directly connected to the second moving contact through a second pull rod, and the double-moving-contact vacuum circuit breaker structure opens and closes normal current through alternate single-side actions of the first electromagnetic repulsion mechanism and the second electromagnetic repulsion mechanism. According to the invention, the driving speed required when the normal working current is cut off to carry out single-side opening is obviously reduced, the stress of each transmission part of the circuit breaker during opening action is reduced, and the mechanical life of the transmission part is prolonged; and meanwhile, the inductor is additionally arranged on the closing stop piece, so that faults such as contact abrasion of the circuit breaker and the like can be monitored in time, and convenience is provided for state monitoring of the circuit breaker.

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.

The present invention relates to a system for monitoring the operational characteristics of an electric power switch. The system for monitoring the operational characteristics of an electric power switch according to the present invention is characterized in that it includes an electrode sensor that is impregnated in a circular, square or pin-shaped structure inside a conventional insulator constituting the electric power switch, or is separately installed outside in the form of a detachable electrode sensor module, and detects an electrostatic voltage induced when the position of the main contact of the electric power switch moves, and an integrated monitoring means that simultaneously calculates and displays the opening and closing time, three-pole non-simultaneous opening and closing time, stroke and operating speed of each phase of the electric power switch based on the voltage value input from the electrode sensor, and outputs a control signal for an alarm or locking when the calculated output value deviates from a predetermined operational characteristic limit range.

The present invention discloses a multi-section supported bellows assembly for a high-voltage circuit breaker, comprising a shell, a first cover plate and a second cover plate are respectively installed on the top and bottom of the shell, a moving conductive rod and a static conductive rod are respectively installed inside the first cover plate and the second cover plate, a moving contact and a static contact are respectively installed on the ends of the moving conductive rod and the static conductive rod that are close to each other, a bellows assembly body is arranged on the outer wall of the moving conductive rod, a sleeve for isolating and protecting the moving contact and the static contact is arranged inside the shell, and an auxiliary driving mechanism for assisting in driving the moving contact to move up and down is arranged on the inner wall of the sleeve. In the invention, the original single-section bellows is changed into a combination of multiple-section bellows, and the multiple bellows bodies can better avoid the columnar instability state caused by the single-section bellows body due to pressure, and the overall axial total stiffness can also be adjusted by the axial stiffness of each bellows body.

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.

A switching device (50) for a medium-voltage electrical circuit (30) is proposed, comprising: - a vacuum bulb (1) having a movable electrode (3), - an actuating lever (4) linked to the movable electrode (3) and movable between an open position (P1) and a closed position (P2), - an insulator (5) linked to the actuating lever (4), - a control sleeve (6) integral with the movable electrode (3), - an elastic return means (7), exerting a return force between the control sleeve (6) and the insulator (5), in which a displacement stroke (C1) of the actuating lever (4) is greater than the opening distance (D1) such that the control sleeve (6) is away from the insulator (5) when the actuating lever (4) is in the closed position (P2), the switching device comprising an indicator rod (8) integral with the control sleeve (6),configured to extend at least partially outside the insulator (5) when the actuating lever (4) is in the closed position (P2).

A method for diagnosing an operating state of a switching device including separable contacts, which are driven by an electromagnetic actuator including a coil connected to an electronic control device, and sensors, which are configured to measure an intensity of a coil current and a coil voltage. The method comprises:a) receiving an order to close via the electronic control device;b) controlling the electromagnetic actuator so that it closes;c) measuring and recording the coil voltage and coil current values;d) calculating and recording values of a magnetic flux through the coil, by integrating the recorded values of the coil current, the coil voltage and resistance and inductance values of the coil; ande) evaluating and recording positions of a core of the electromagnetic actuator according to a data table, which is previously recorded in the electronic control device and which defines a bijective relation between the position of the core, the magnetic flux and the coil current.

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.

The invention relates to a method for improved condition monitoring of a power circuit breaker (2), which is used in a switch panel (1.4) of a medium-voltage switchgear (100) as an overcurrent protection device, wherein a current value of a parameter, which is a measurement for the wear of switch contacts of the power circuit breaker (2), is transferred from a data store (3b) of the switch panel (1.4) to a data store (10c) of the power circuit breaker (2) when the power circuit breaker (2) is removed from the switch panel (1.4).

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.

A switching device (50) for a medium-voltage electrical circuit (30) is proposed, comprising: - a vacuum bulb (1) having a movable electrode (3), - an actuating lever (4) linked to the movable electrode (3) and movable between an open position (P1) and a closed position (P2), - an insulator (5) linked to the actuating lever (4), - a control sleeve (6) integral with the movable electrode (3), - an elastic return means (7), exerting a return force between the control sleeve (6) and the insulator (5), in which a displacement stroke (C1) of the actuating lever (4) is greater than the opening distance (D1) such that the control sleeve (6) is away from the insulator (5) when the actuating lever (4) is in the closed position (P2), the switching device comprising an indicator rod (8) integral with the control sleeve (6),configured to extend at least partially outside the insulator (5) when the actuating lever (4) is in the closed position (P2).

A vehicle interrupting device is provided that enables a switch to be operated in a manner that improves its durability. An interrupting device (1) includes a first switch (33A) configured to switch a current path (11) between a conductive state and an interrupted state, the current path serving as a pathway for transmitting current supplied by a power supply unit (10). The interrupting device (1) includes a control unit (15) configured to perform deterioration determination processing, comparing a resistance value (R) and a resistance threshold value (Th1) of the first switch (33A).The control unit (15) determines that the first switch (33A) is in a deteriorated condition when the resistance value (R) is greater than or equal to the resistance threshold value (Th1) and notifies an external unit of the deteriorated condition.

The invention relates to the related technical field of circuit breakers, in particular to a passive built-in temperature measurement circuit breaker and a method, the passive built-in temperature measurement circuit breaker comprises a moving contact and a static contact matched with the moving contact, and further comprises a driving rod connected with the moving contact through a plurality of groups of elastic structures, and 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 after the moving contact makes contact with the static contact, the driving rod and the moving contact move relatively. In the closing process, the moving contact and the static contact are in butt joint before contact of the arc-shaped contact piece and the moving contact, and in the opening process, separation of the arc-shaped contact piece and the moving contact is before contact of the arc-shaped contact piece and the moving contact and separation of the moving contact and the static contact are after contact of the arc-shaped contact piece and the static contact, so that the situation that the arc-shaped contact piece and the static contact are separated in the closing and opening processes can be effectively avoided. The electric arc generated between the moving contact and the static contact interferes with the temperature measurement function, so that stable acquisition and transmission of temperature-related signals are ensured, and the problem of false early warning is avoided.

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).

The invention relates to a method for detecting an insufficient contact pressure between two contacts of an electrical switching unit, the unit comprising means for resetting the mechanism after closing of a mechanism for controlling the switching unit, the resetting means comprising an electric motor capable of completing a closing operation of the control mechanism in the case of an incomplete closing by the control mechanism and before resetting or in the case of an incomplete closing without any wear, the insufficient contact pressure being caused by wear in the mechanism, the kinematic chain, the motor, the parts involved in compressing the closing spring. The method consists in detecting, by analyzing the envelope curve of the current consumed by the motor over time, whether the motor has completed closing and / or whether the resetting torque corresponds to a resetting torque called the normal resetting torque to perform the resetting after the closing operation of the control mechanism, and if the motor has completed closing, inferring that the wear is caused by wear in the mechanism, the kinematic chain or even the motor.

Multi-pole and single-pole circuit breakers include a housing and a reset lockout mechanism disposed within the housing. The reset lockout mechanism disables electrical communication between line and load terminals of the circuit breaker if a predefined condition exists. Some circuit breakers include a single actuator, transition between ON and OFF states, and are capable of performing test functions. The test functions may involve testing AFCI and / or GFCI functions of the circuit breakers. The test functions may be performed when the circuit breaker transitions from an OFF state to an ON state. Some circuit breakers including a reset lockout mechanism may be powered only on its line side. Some circuit breakers provide an electrical indication when they are in the OFF state.

An electronic system includes: a mechanical electromagnetic relay configured to mechanically switch a contact according to application of current to a coil; and a processor configured to calculate, based on a number of operations of the contact of the mechanical electromagnetic relay and an index of electric power applied to the coil, a remaining service life of the mechanical electromagnetic relay; and transmit a notification indicating the calculated remaining service life of the mechanical electromagnetic relay.

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.