37results about How to "Shorten tripping time" patented technology

Systems and methods for controlling a rail vehicle are provided. In one embodiment, a rail vehicle system includes a first version of a travel database including travel information, a communication link to receive a second version of the travel database, and a controller configured to, in response to the second version of the travel database including changes to the travel information that meet predefined override criteria, control operation of the rail vehicle system based on the first version of the travel database; and in response to the changes to the travel information not meeting the predefined override criteria, adjust operation of the rail vehicle system to operate based on the second version of the travel database.

A pressure trip device for a circuit breaker comprises a plurality of single pole switching units, each unit corresponding to each electrical phase hermetically mounting movable contactors and fixed contactors in an insulated case in order to switch electrical circuits according to each phase, having arc gas exhaust port, and connected to one another by a shaft; a switching mechanism connected to one of the single pole switching units for contacting or separating the movable contactor of the connected single pole switching unit to / from the fixed contactor of the connected single pole switching unit; a trip bar connected to the switching mechanism for tripping the switching mechanism; a gas pressure shooter facing the trip bar, and perpendicularly movable between a position for rotating the trip bar by a pressurization and a position separated from the trip bar; and a protrusion wall portion having a pair of wall portions facing to each other and perpendicularly extending from at least one outer surface of each case of the single pole switching units, having one wall portion for connecting lower ends of the pair of wall portions to each other, and forming a gas pressure storing space for supporting the gas pressure shooter to be perpendicularly movable and connected to the arc gas exhaust port. Accordingly, the circuit breaker is tripped faster than the conventional one using a tripping process by mechanisms of multi-step.

The invention relates to a tripping apparatus (1), particularly for circuit breakers, which comprises at least one controllable tripping magnet (2) having an armature (2.1) that is operatively connected to a downstream tripping gear (6.3), which engages in a tripping mechanism that acts on the circuit breaker and is coupled to a preloaded spring (4) serving as a force amplifier. According to the invention, the tripping mechanism comprises a camshaft (5) having a plurality of cam lobes (5.1, 5.2, 5.4), wherein an actuating means (6) is associated with each cam lobe (5.1, 5.2, 5.4) having an offset rotational angle, and wherein, when tripped, at least two actuating processes associated with the respective actuating means (6.1, 6.2, 6.3) take place consecutively, so that the full spring force is transmitted by way of the camshaft (5) to at least one of said actuating means (6.1, 6.2, 6.3) so as to perform the relevant actuating process.

An electromagnetic short current protective mechanism for a breaker belongs to the technical field of low voltage electric appliances. The protective mechanism is characterized by comprising an iron core, an elastic element and a lock catch actuating device, wherein the iron core is used for being arranged on the upper part of one end along the length direction of an arc extinguish chamber shell of the breaker and is matched with an upper fixed contact arranged on the arc extinguish chamber shell; the elastic element is supported on the upper fixed contact; and the lock catch actuating deviceof a lock catch is used for actuating a breaker operating mechanism, and the lock catch actuating device is hinged on the arc extinguish chamber shell and is contacted with the elastic element. The protective mechanism has the advantages of having concise structure, saving space usage, improving operational reliability and stability of the breaker and ensuring personal safety and the safety of circuits and power equipment. Meanwhile, the protective mechanism guarantees the internal isolation level and has good processing safety particularly when a roof cover of the breaker is opened to performmaintenance or replace internal attachments.

The invention discloses a circuit breaker. The circuit breaker comprises an operation mechanism, one or more one monopole units and one or more electromagnetic short circuit protection mechanisms. The operation mechanism is connected with a moving contact in each monopole unit so as to connection / disconnection of the moving contact with / from a static contact of each monopole unit, and each monopole unit is arranged to cooperate with one corresponding electromagnetic short circuit protection mechanism. Each electromagnetic short circuit protection mechanism comprises an iron core which is arranged above the static contact of the monopole unit arranged to cooperate with the electromagnetic short circuit protection mechanism; a lock catch brake device which is arranged below the static contact and is hinged with the inside of the monopole unit through a shaft; and an elastic element which is arranged between the lock catch brake device and the monopole unit. According to the invention, when fault currents flow through the static contacts, the iron cores are magnetized and generate electromagnetic attraction, when the electromagnetic attraction is greater than the counterforce of the elastic elements, and the lock catch brake devices rotate towards the directions of the iron cores so that lock catches in the operation mechanism brake, the moving contacts and the static contacts in the monopole units are disconnected, and the fault currents are cut off accordingly.

The invention belongs to the technical field of electrical switches, and relates to a permanent magnetic mechanism capable of adjusting the switching on-off time and an adjusting method thereof. The permanent magnetic mechanism comprises a permanent magnetic mechanism, and an outer yoke, an upper yoke, a lower yoke, a moving core, a core back cover, a pull rod, a switching-off spring, a contact spring, an adjusting nut, a locking nut, an inner yoke, a coil, and a permanent magnet, all of which are arranged inside the permanent magnetic mechanism. The outer yoke is arranged at the outer side of the permanent magnetic mechanism, the upper yoke and the lower yoke are fixedly installed at the upper and lower ends of the outer yoke, the switching-off spring is arranged in a cavity formed by the moving core, the core back cover and the upper yoke, and the contact spring is arranged between the lower end of a stepped circle at the upper end of the pull rod and the core back cover. By adopting the permanent magnetic mechanism of the invention, the switching on-off time can be adjusted, the time of tripping protection can be effectively shortened, and the quickness of line quick-break protection is ensured. The permanent magnetic mechanism and the adjusting method are especially suitable for a circuit break of which both the switching-off spring and the contact spring participate in the switching-on / off process and which is equipped with multiple permanent magnetic mechanisms, and are applicable to the field of electric power.

The invention discloses an execution mechanism of a low-voltage circuit breaker. The execution mechanism comprises a base, a tripping mechanism and a reset mechanism, wherein the base is of a hollow cavity structure; the tripping mechanism is arranged in a cavity; the tripping mechanism comprises a power assisting plate, an energy storage spring, a push plate and a lock plate; the energy storage spring is connected with the power assisting plate; one end of the push plate is connected with a flux transformer; the reset mechanism comprises a reset bracket, a reset seat and a reset seat assembly; the reset seat is provided with a hollow cavity; the reset seat assembly comprises a flux top block, a reset pressure spring and a reset seat; and the reset pressure spring and the flux top block are arranged in the hollow cavity of the reset seat. The execution mechanism is capable of achieving fast tripping and resetting; and the fast tripping mechanism is capable of increasing the motion speed of the push plate of the execution mechanism, so that the tripping time of the circuit breaker is shortened, lateral force component to a flux top rod is reduced by the reset mechanism, a coating on the flux top rod is not damaged after the flux transformer moves for multiple times and the life of the flux transformer is prolonged.

The invention belongs to the technical field of electric power systems, and in particular relates to an accelerated tripping method for main transformer backup protection based on information shared across intervals and applied to intelligent substations. The invention adds an acceleration trip logic to the backup protection function of the medium / low voltage side of the main transformer, and the backup protection of the middle and low voltage side of the main transformer uses the shared information across the interval to realize the acceleration judgment. The invention sends the position information of the bus tie section circuit breaker into the main transformer protection, and realizes the accelerated tripping of the circuit breakers on all sides of the main transformer under the condition of the bus tie sub-position or the bus tie charging, thereby shortening the tripping time and improving the protection. Significant advantages such as quickness and improved protection performance.

The invention discloses a trip-out breaker adaptive search method based on Dijkstra algorithm, and the method comprises the following steps: 1) obtaining the adjacency matrix of the circuit breaker and the adjacency matrix of the protected element and the circuit breaker; 2) updating and correcting the adjacency matrix of the protected element and the circuit breaker; 3) determining whether there is a faulty element in the smart grid; 4) calling the Dijkstra algorithm module to make a first judgment and to obtain the trip-out circuit breaker; 5) performing a first updated correction to the adjacency matrix of the breaker; 6) determining whether the trip-out circuit breaker fails or not; 7) determining whether the direct current power supply disappears or not; 8) performing a second updated correction to the adjacency matrix of the breaker after the first updated correction and 9) calling the Dijkstra algorithm module to make a second judgment and getting the number of the trip-out circuit breaker finally. According to the invention, the adaptive search time is short, and the method is very adaptive for onsite main wiring manner and the change in the running mode so as to ensure that the cutting scope of the trip-out breaker is minimal.

Systems and methods for controlling a rail vehicle are provided. In one embodiment, a rail vehicle system includes a first version of a travel database including travel information, a communication link to receive a second version of the travel database, and a controller configured to, in response to the second version of the travel database including changes to the travel information that meet predefined override criteria, control operation of the rail vehicle system based on the first version of the travel database; and in response to the changes to the travel information not meeting the predefined override criteria, adjust operation of the rail vehicle system to operate based on the second version of the travel database.

A load center comprises a common instantaneous tripping unit that works on a principle of solid state switching. The load center further comprises a plurality of branches of branch circuit breakers each of which is coupled to the common instantaneous tripping unit via a corresponding high power connection and a corresponding low power connection such that the common instantaneous tripping unit feeds the plurality of branches at the same time. The common instantaneous tripping unit interrupts a short circuit fault in an interruption time which is significantly reduced thus reducing or eliminating chances for a personal injury during the short circuit fault.

The invention belongs to the technical field of electrical switches, and relates to a permanent magnetic mechanism capable of adjusting the switching on-off time and an adjusting method thereof. The permanent magnetic mechanism comprises a permanent magnetic mechanism, and an outer yoke, an upper yoke, a lower yoke, a moving core, a core back cover, a pull rod, a switching-off spring, a contact spring, an adjusting nut, a locking nut, an inner yoke, a coil, and a permanent magnet, all of which are arranged inside the permanent magnetic mechanism. The outer yoke is arranged at the outer side of the permanent magnetic mechanism, the upper yoke and the lower yoke are fixedly installed at the upper and lower ends of the outer yoke, the switching-off spring is arranged in a cavity formed by the moving core, the core back cover and the upper yoke, and the contact spring is arranged between the lower end of a stepped circle at the upper end of the pull rod and the core back cover. By adopting the permanent magnetic mechanism of the invention, the switching on-off time can be adjusted, the time of tripping protection can be effectively shortened, and the quickness of line quick-break protection is ensured. The permanent magnetic mechanism and the adjusting method are especially suitable for a circuit break of which both the switching-off spring and the contact spring participate in the switching-on / off process and which is equipped with multiple permanent magnetic mechanisms, and are applicable to the field of electric power.

The invention discloses a relay protection method for a traction network connected in series with multi-level switching stations. The traction network is powered by a traction substation and an n-level switching station in series, and the feeder line of the traction substation is connected with the switching stations of each level. Both line and feeder are equipped with circuit breakers; respectively carry out protection setting calculations for the feeder line of the substation, the incoming line of the switching station, the feeder line of the first n‑1 level switching station and the feeder line of the nth level switching station; and then protect according to the corresponding calculation results configuration. The invention can reduce the number of protection stages and shorten the tripping time; it has the characteristics of low cost, easy realization and the like.

The invention discloses an execution mechanism of a low-voltage circuit breaker. The execution mechanism comprises a base, a tripping mechanism and a reset mechanism, wherein the base is of a hollow cavity structure; the tripping mechanism is arranged in a cavity; the tripping mechanism comprises a power assisting plate, an energy storage spring, a push plate and a lock plate; the energy storage spring is connected with the power assisting plate; one end of the push plate is connected with a flux transformer; the reset mechanism comprises a reset bracket, a reset seat and a reset seat assembly; the reset seat is provided with a hollow cavity; the reset seat assembly comprises a flux top block, a reset pressure spring and a reset seat; and the reset pressure spring and the flux top block are arranged in the hollow cavity of the reset seat. The execution mechanism is capable of achieving fast tripping and resetting; and the fast tripping mechanism is capable of increasing the motion speed of the push plate of the execution mechanism, so that the tripping time of the circuit breaker is shortened, lateral force component to a flux top rod is reduced by the reset mechanism, a coating on the flux top rod is not damaged after the flux transformer moves for multiple times and the life of the flux transformer is prolonged.

The invention discloses a circuit breaker operating mechanism which is provided with a tripping locking device capable of tripping quickly in a short circuit, wherein the circuit breaker operating mechanism is supported by a rack. The circuit breaker operating mechanism specifically comprises a tripping connecting rod device, a switch spindle, the tripping locking device and a brake separating half shaft. The tripping connecting rod device is related to a tripping hook and a brake separating spring. When the tripping hook moves from a loading position to a brake separating position, a moving contact can be driven to move from an on-position to an off-position. The switch spindle is connected with the tripping connecting rod device and is connected to all moving contacts which support a circuit breaker. The tripping locking device is matched with the tripping hook. When the tripping locking device is at a locking position, the circuit breaker operating mechanism is in a bearing state; when the tripping locking device is at an unlocking position, the circuit breaker operating mechanism is in a jumping state. The brake separating half shaft is controlled by a jumping action piece and used for relieving the locking state of the tripping locking device. When a short-circuit current exceeds a calibrated threshold value, the tripping locking device is at the unlocking position, the circuit breaker operating mechanism trips automatically, and the threshold value is defined by an elastic element. The circuit breaker operating mechanism is simple in structure and easy to realize.

The invention discloses a leakage protection circuit with leakage protection in circuit breaker capable of simplifying application circuit design. The leakage protection circuit comprises a rectifying circuit, a leakage current transformer, a leakage protection control circuit, a controllable electronic switch, a trip coil and a forcing trip circuit; two ends of the trip coil are respectively connected to the positive output end of the rectifying circuit and a corresponding switching end of the controllable electronic switch; the other switching end of the controllable electronic switch is connected to the negative output end of the rectifying circuit; the control end of the controllable electronic switch is connected to the output end of the leakage protection control circuit; the output ends of the leakage current transformer are respectively connected to corresponding ends of the leakage protection control circuit; the power supply end and the ground end of the forcing trip circuit are respectively connected to the power supply end and the ground end of the leakage protection control circuit; the noise suppression end and the output end of the forcing trip circuit are respectively connected to the noise suppression end and the output end of the leakage protection control circuit. According to the leakage protection circuit, the design of the application circuit can be greatly simplified.

The invention discloses a dual-fault contact actuator of a low-voltage circuit breaker. The dual-fault contact actuator comprises a base plate, wherein a push plate is arranged on the base plate, the central position of the push plate is connected with a base plate shaft, the push plate can rotate around the shaft in a reciprocating mode, a first microswithc and a second microswitch are arranged at the opposite-angle positions of a rotation covering area of the push plate, the microswitches are both clamped on the base plate through buckles, and the push plate can rotate around the shaft to push the two microswitches to actuate and be both in on or off states. The dual-fault contact actuator is additionally provided with a group of actuator fault contacts, so that a user requirement is met; by means of a full-buckled installation structure, the dual-fault contact actuator is more convenient to install, and work efficiency is greatly improved; when the actuator releases, the push plate can provide certain thrust for an assist plate, the assist plate can move more quickly, and releasing time of the breaker is reduced.

The invention discloses an identification method of fault current in a starting process of an asynchronous motor. The method comprises the following steps: (1) carrying out high-speed digital sampling on voltage and current of the asynchronous motor and forming a sampling data sequence of representing voltage and current change processes; (2) reconstructing equivalent BH curves of an iron core and an air gap between a stator and a rotor of the asynchronous motor through combined application of voltage and current data of the asynchronous motor, and calculating the slopes of the ellipse long-axis directions of the equivalent BH curves; and (3) identifying the starting current and the fault current during a startup period according to the change of the slopes of the ellipse long-axis directions of the equivalent BH curves. According to the identification method, the starting current and the fault current in the starting process can be effectively identified; the fault identification sensitivity in the starting process is improved; and the action time is shortened.

The invention discloses a fast tripping device of an execution mechanism of a low-voltage circuit breaker. The fast tripping device comprises a power assisting plate, an energy storage spring, a push plate and a lock plate for locking the power assisting plate, wherein the push plate and the lock plate are rotationally arranged on a base; and when a control part of the low-voltage circuit breaker detects a fault signal, a tripping instruction is output to the execution mechanism, a flux transformer is electrified to act, a flux top rod extends outside and pushes the push plate to rotate, and the push plate drives the lock plate to rotate while rotating, the power assisting plate is unlocked after the lock plate rotates, and the power assisting plate quickly moves under the tension action of the energy storage spring, so that the push plate carries out accelerated movement and drives the circuit breaker to fast open and trip. According to the fast tripping device disclosed by the invention, the movement speed of the push plate of the execution mechanism can be increased, so that the tripping time of the circuit breaker is shortened, the breaking capacity of the circuit breaker is improved, the tripping time is shortened by 20% in comparison with that in the prior art, and the tripping efficiency is greatly improved.