39results about "Contact testing/inspection" patented technology

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.

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 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.

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 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.

A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

In embodiment, the switching device (1) comprises a switching unit (2) with electrical contact surfaces (21, 22), a voltage metering circuit system (3), a current sensor (4) and a calculation unit (5). The voltage metering circuit system (3) is connected to a first end (23) and second end (24) of the switching unit (2) and 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 a current (11). The calculation unit (5) is connected to the voltage metering circuit system (3) and the current sensor (4) and is configured to determine a 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 a contact wear of the contact surfaces (21, 22) based on the contact resistance (6) of the contact surfaces (21, 22).

Relay (1), comprising: a first established contact (11); a second fixed contact (12); a movable contact part (7) having a first movable contact (13) facing the first fixed contact (11) and a second movable contact (14) facing the second fixed contact (12), wherein the movable contact part (7) is arranged such that it is movable in a contact direction in which the first movable contact (13) and the second movable contact (14) come into contact with the first fixed contact (11) and the second fixed contact (12) and in a separation direction in which the first movable contact (13) and the second movable contact (14) are separated from the first fixed contact (11) and the second fixed contact (12); a drive device (4) which is arranged in the direction of contact with respect to the movable contact part (7) and is configured to generate a drive force for moving the movable contact part (7); a drive shaft (15) extending in a direction of movement of the movable contact part (7) and having an end section (15c) that protrudes in the separation direction from the movable contact part (7) and is configured to transmit the driving force to the movable contact part (7), and a first housing (2c) designed to accommodate the first fixed contact (11), the second fixed contact (12) and the movable contact part (7), wherein the first housing (2c) has a test hole (61) which is arranged in a position facing an end section of the drive shaft (15) in the separation direction and passes through the first housing (2c).

A method is proposed for detecting a degradation of a switching device (30) comprising: - a movable electrical contact (10), - a control mechanism (4) comprising: -- a drive element (9) for the movable contact (10) -- an elastic element (7) linked to the drive element (9), -- a release element (8) configured to release the elastic element (7) so as to move the contact (10) in order to open an electrical circuit (50), - an actuator (1) configured to move the release element (8), the method comprising the steps: (i) controlling the actuator (1), (ii) determining a time interval (D) between a first instant (t1) corresponding to a predetermined position (P1) of the release element (8) and a second instant (t2) corresponding to a predetermined position (P2) of the drive element (9), (v) performing a series of successive commands of the actuator (1), so as to obtain a set (E) of values ​​of the duration (D),(vi) determine a degradation of the unlocking element (8) of the switching device (30) from the evolution of the values ​​of the assembly (E).

The invention relates to a method for the improved monitoring of the state of a circuit breaker (2) which is used as an overcurrent protection device in a switching panel (1.4) of a medium-voltage switching device (100), in which, when the circuit breaker (2) is removed from the switching panel (1.4), the current value of a parameter of the degree of wear of the switching contacts of the circuit breaker (2) is calculated as the current value of the parameter of the degree of wear of the switching contacts of the circuit breaker (2). The data is transmitted from the data memory (3b) of the switch panel (1.4) to the data memory (10c) of the circuit breaker (2).

The invention discloses a contactor detection circuit, comprising: a comparator; the output end of the reference voltage generation circuit is connected with the inverted input end of the comparator, and the reference voltage generation circuit is used for inputting reference voltage V1 to the inverted input end of the comparator; the sampling circuit is electrically connected to the two static contacts of the contactor, the output end of the sampling circuit is connected with the in-phase input end of the comparator, and the sampling circuit is used for inputting sampling voltage V2 to the in-phase input end of the comparator; and the output end of the waveform generator is connected with the input end of the sampling circuit, and the waveform generator is used for inputting a periodically changing voltage signal V3 to the sampling circuit. When the contactor is in an off state, the sampling voltage V2 output by the sampling circuit is a periodic waveform, and the comparator outputs 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, and the comparator outputs a high level. According to the invention, an isolation power supply, an isolation operational amplifier, an MCU (Microprogrammed Control Unit) and special software for development are not needed, so that the cost is greatly reduced.

The invention relates to a method for checking the state of a vacuum interrupter unit (1), having the steps of: - detecting X-ray radiation (8) emitted by the vacuum interrupter unit (1), - generating an image (11) of at least one radiation source (R1, R2, R3) in and / or on the vacuum interrupter unit (1) on the basis of the detected X-ray radiation (8), the X-ray radiation (8) being emitted from the at least one radiation source (R1, R2, R3), - determining at least one piece of information about the at least one radiation source (R1, R2, R3) on the basis of the generated image (11), and - checking the state of the vacuum interrupter unit (1) on the basis of the at least one piece of determined information about the at least one radiation source (R1, R2, R3). The invention also relates to a test device (6) and a test system (7).

A vehicle charging system (10) for an electric vehicle (14), comprising: a housing (102) with an engagement end for joining with a charging component (40) for the electric vehicle, wherein the housing has an inner recess (134); a charging port (107) which is held by the housing in the inner recess, the charging port having an engagement end (210) for engaging with the charging component, the charging port being connected to a current conductor (105) to form a current transmission line; and a charging control unit (140) for controlling vehicle charging along the power transmission line, wherein the charging control unit has a charging sensor assembly (146) coupled to the charging control unit, wherein the charging sensor assembly monitors the charging status of the vehicle charging system along the power transmission line and generates a charging output signal, wherein the charging sensor assembly transmits the charging output signal to the charging control unit, wherein the charging sensor assembly is configured to detect an arc signature from an arc event and generate an arc output signal to the charging control unit; wherein, based on the arc output signal associated with the arc event, the charging control unit generates an initial control output to perform an initial protective action, including shutting down the charging process; and where, based on the arc output signal associated with the arc event, the charging control unit generates a second control output to implement a second protective measure.

An on-load tap changer is disclosed. It includes an actuator configured to adjust a turn ratio of the transformer, and a processing unit configured to control the actuator and to communicate with a control device via a digital signal connection. The processing unit is further configured to receive a status detected by a sensor. A method of manufacturing the on-load tap changer is also disclosed. The embodiments according to the present disclosure provide a digitalized on-load tap changer that allows various statuses to be monitored or controlled, by which various advantages can be achieved. For example, the life of a contact of the transformer can be predicted in addition. Other data can be used to determine whether it is safe to adjust the contact of the transformer. Moreover, the optical fibers between the on-load tap changer and an external device enable an isolated transmission of control and data signals that almost eliminates interferences.

A disconnect switch including a main disconnect switch integrated with a bypass switch. The purpose of he bypass switch is to provide a parallel path for temporarily closing the disconnect switch so that the main disconnect switch can be tested (i.e., opened and closed) without interrupting the power flow through disconnect switch. The bypass switch is integrated with the main disconnect switch and supported by the same insulator structure, which avoids duplication of parts and provided for a compact unit suitable for deployment on a pole or other mounting structure outside a substation. The bypass switch also includes a frame-mounted linkage at ground voltage operated by an actuator at ground voltage, which avoids the use of “hot sticks” to operate the bypass stitch.

A method for determining a health condition of an electrical device comprising a mechanical actuation system includes obtaining measurement data indicative of a measured travel curve of the mechanical actuation system; obtaining model data indicative of a modeled travel curve of the mechanical actuation system in the electrical device, the model data being based on a mechanical model of the mechanical actuation system; and determining the health condition of the electrical device based on the measurement data and the model data.

The invention relates to a method for determining the thermal lifetime (LD (T)) of an electromechanical switching device (10), comprising the following steps: acquiring a temperature measurement (Tm) at a measurement point (P) of the switching device (10); -if the temperature measurement (Tm) is less than or equal to a predefined allowable temperature (Tzul) of the switching device (10), determining the thermal life (LD) as a predefined maximum life (LDmax) of the switching device (10) and reducing the life (LD) as a function of the elapsed time; determining the thermal life (LD) by means of the temperature-time characteristic curve (Ki, Si) if the temperature measurement value (Tm) is greater than the permissible temperature (Tzul) and is less than or equal to a predefined maximum permissible temperature (Tmax) of the switching device (10), said maximum permissible temperature being greater than the permissible temperature (Tzul); and if the temperature measurement value (Tm) is greater than the maximum allowable temperature (Tmax) of the switching device (10), determining the thermal life (LD) according to a specification predefined for this situation.

The present invention relates to a diagnostic method (200) for a circuit breaker comprising at least one pole, each pole comprising an electrical contact configured to switch between a closed position and an open position. The method comprises: - for each pole of the circuit breaker, at least one image (208A, 208B) of the pole's electrical contact; - for each pole of the circuit breaker, at least one determination (218A, 218B) of a health state of the pole from among at least two states by means of an artificial intelligence algorithm, the artificial intelligence algorithm taking as input at least one image of the pole and providing as output the health state of the pole; - a determination (220A, 220B) of a health state of the circuit breaker from among at least two states, depending on the health state of each pole; and - a restitution (222, 224) of the health state of the circuit breaker.

The invention relates to a method for checking the state of a vacuum interrupter unit (1), having the steps of: - detecting 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 on the basis of the detected X-ray radiation (9), at least one radiation source being represented by at least one image point (B1, B2, B3, B11, B12, B13) in the image (12), - detecting an X-ray spectrum (19, 20, 21, 22, 23) of the X-ray radiation (9) in the at least one image point (B1, B2, B3, B11, B12, B13), and - checking the state of the vacuum interrupter unit (1) on the basis of the detected X-ray spectrum (19, 20, 21, 22, 23). The invention also relates to a test device (7) and a test system (8).

The present invention provides a circuit breaker, a circuit breaker overtravel adjustment method and a power system. The circuit breaker comprises an arc extinguishing structure, a moving contact, and a static contact. The circuit breaker further comprises: a driving assembly is connected to the moving contact, and the moving contact is driven to make contact with or separate from the static contact. The driving assembly has an accommodating cavity. A contact pressure spring is provided within the accommodating cavity and abuts between the moving contact and the driving assembly, and is used to apply a force to the moving contact toward the static contact when the circuit breaker is in a closed state. A detection assembly comprises a pressure detector and a distance sensor. The pressure detector is disposed between the contact pressure spring and the driving assembly, and measures the pressure value of the contact pressure spring when the moving contact and the static contact tightly abut. The distance sensor is used to detect the measure distance between the moving contact and the distance sensor so as to determine the overtravel between the moving contact and the static contact according to the pressure value and the detection distance. The circuit breaker has higher reliability.

The invention relates to a method for evaluating a switch event in an electromechanical switching device which is inserted in a load current path, said method comprising the following steps: - detecting temperature-current intensity value pairs (Tm, Im), having a temperature measurement value (Tm) of a temperature measured at a temperature measurement point (X) of the switching device (10) and a current intensity measurement value (Im) of a current (l) flowing through the load current path, which was measured simultaneously with the temperature measurement value (Tm); - recording said temperature-current intensity value pairs which were detected at different times; - comparing at least one temperature-current intensity value pair at a time before the switch event with at least one temperature-current intensity value pair at at least one time after the switch event; and - evaluating the switch event on the basis of the comparison.