41results about How to "Improve interrupt performance" patented technology

An arrangement for interrupting current comprising a first and a second terminal adapted to electrically connect two sections of a power system is provided. A voltage control means is controllable in use to inject energy into said loop to force a rapid increase of an alternating current flowing through said main branch while being controlled to open to interrupt a main current, and whereby zero cross-over of the current through the mechanical main circuit breaker is realized as the amplitude of the alternating current exceeds the amplitude of the main current. An energy absorbing device is adapted to limit the voltage across said capacitor and said mechanical breaker when the mechanical breaker is open, and across an inductive element if the voltage across the mechanical breaker breaks down, at or immediately after an opening process, thereby limiting the rate-of-rise and the peak of the current through said loop.

A fuse including a fuse housing having first and second electrical terminals, a movable partition made from an electrically conductive material movably disposed within the fuse housing, a fusible structure connected between the first electrical terminal and the movable partition, a conductor connected between the movable partition and the second electrical terminal, a biasing element acting on the movable partition to maintain the fusible structure in tension and for moving the movable partition upon melting of the fusible structure and an indicator connected between the movable partition and the second electrical terminal. The conductor, the movable partition and the fusible structure define an electrical path between the first and second electrical terminals and the indicator protrudes out of the second electrical terminal of the fuse housing upon melting of the fusible structure for providing visual indication of an interrupted condition of the fuse when subjected to a threshold current flowing therethrough.

This invention discloses a low-voltage circuit breaker with a capability of tripping quickly. Its main feature is that at least one of the side faces of the contact device provides an open flange which has an internal through hole, and the bottom of a rotating shaft disposed on the bottom part provides a stressed member. The stressed member receives the over-pressure airflow escaping from the open flange of the contact device to generate a force. The force is passed to the activating member by the rotating shaft and is magnified, then hits the latch quickly and makes a trip. An intermediate step is bypassed due to the force produced earlier, the force which is produced by the electromagnetism part in the heat energy and electromagnetic system, so that the low-voltage breaker can open quickly and reduces opening time greatly and improve the breaking capability.

An electrical contact used herein comprises chromium; one of copper and silver; and a carbide, in which the electrical contact comprises a matrix and chromium, the matrix phase mainly comprising one of copper and silver, and the chromium being surrounded by the carbide and dispersed in the matrix. The electrical contact contains 1 to 30 percent by weight of a carbide, with the balance being copper. Another electrical contact contains chromium, copper, and a carbide and has a weight ratio of chromium to the carbide within the range of 1:1.5 to 1:50.

The present disclosure relates to a circuit breaker of a gas-insulated switchgear, and more particularly, to a self-blast circuit breaker of a gas-insulated switchgear, which reuses arc heat. A self-blast circuit breaker having a heat expansion chamber and a puffer chamber includes auxiliary intake valves which introduce a hot gas exhausted through an inside of an actuating rod, into the heat expansion chamber.

An electrical contact used herein comprises chromium; one of copper and silver; and a carbide, in which the electrical contact comprises a matrix and chromium, the matrix phase mainly comprising one of copper and silver, and the chromium being surrounded by the carbide and dispersed in the matrix. The electrical contact contains 1 to 30 percent by weight of a carbide, with the balance being copper. Another electrical contact contains chromium, copper, and a carbide and has a weight ratio of chromium to the carbide within the range of 1:1.5 to 1:50.

The invention provides a power allocation method for an asymmetric two-way relay channel based on outage probability analysis. The method comprises the following steps: 1) establishing a conventional three-node two-way relay communication system model, and carrying out initialization on each node power; 2) introducing asymmetric factors into the conventional three-node model, and having four kinds of asymmetric situations; 3) calculating system outage probability under the four kinds of asymmetric situations, and making comparison; 4) carrying out segment processing on the outage probability of the system under the downlink asymmetric situation; and 5) with the system outage probability serving as an objective function, and total power serving as constraint conditions, carrying out adaptive power resource allocation according to a power allocation scheme, where the objective function is minimum. The method can allocate power values of the user nodes according to channel state information; the power allocation value is a segmented function related to the asymmetric factors; and the nodes can adjust transmitting power adaptively according to change of the channel states, thereby improving outage performance of the asymmetric channel communication system.

A fixed electrode 10 and a movable electrode have coil electrodes formed of plural coil portions installed at both contacts and on a rear surface side in a divided manner in a circumferential direction along peripheries of the contacts such that a longitudinal field is generated in a direction in which the fixed contact and the movable contact come close to and move apart from each other. Protruding portions joined to the contacts are provided to tip ends of the respective coil portions to form joint portions to the respective contacts. A current to be flowed is controlled by changing resistance values between the contacts and the coil electrodes for each joint portion.

An electromagnetic relay is provided which is small in size and is capable of controlling two circuits of an ordinarily-open contact, which has a large current-carrying capacity and high interrupting capability, and which is excellent in resistance against shock and vibration. Movable contactors are held, through bow-shaped movable contactor springs, to two -shaped holding frames each being electrically separated and being mechanically connected via a card made of a highly heat-resistant resin in a card block. Thick-plate shaped movable contacts, which are attached to the movable contactors in a fixed manner, are electrically connected or disconnected to fixed contacts in a base block, in synchronization with operations of an armature of an electro-magnet block. In order to improve a current-carrying capability and interrupting capability, there are provided two pieces of ordinarily-open contacts which are connected in series to each other, and between which an interval is doubled, in each of two circuits.

A mold cased circuit breaker, which includes a casing, a switching unit disposed in the casing to open or close an electric circuit, and movable and stationary contactor units present within the casing, includes an arc-extinguishing unit. The arc-extinguishing unit includes a pair of side plates facing each other with being spaced from each other, at least one first grid arranged between the side plates and spaced apart from one another with preset intervals, and a second grid coupled to upper ends of the side plates, spaced apart from the first grid, and having a bent portion with a preset angle.

This invention discloses a low-voltage circuit breaker with a capability of tripping quickly. Its main feature is that at least one of the side faces of the contact device provides an open flange which has an internal through hole, and the bottom of a rotating shaft disposed on the bottom part provides a stressed member. The stressed member receives the over-pressure airflow escaping from the open flange of the contact device to generate a force. The force is passed to the activating member by the rotating shaft and is magnified, then hits the latch quickly and makes a trip. An intermediate step is bypassed due to the force produced earlier, the force which is produced by the electromagnetism part in the heat energy and electromagnetic system, so that the low-voltage breaker can open quickly and reduces opening time greatly and improve the breaking capability.

The invention relates to a novel method of producing a resistor device comprising a PTC-polymer element 2 and a varistor element 4. Both elements are molded in a common molding process using one common mold. Preferred is co-injection molding. The invention further relates to the resistor device thus produced and a current limit means including the resistor device and a switch (FIG. 4).

A switchgear having interrupters wherein at least two moving contacts are capable of being open and close with respect to respective fixed contacts. The switchgear comprises a non-earthed metal vacuum chamber enclosing the interrupters therein, a connection conductor for connecting the moving contacts, an operating rod connected to the connecting conductor by means of an insulator and protruding from the non-earthed metal vacuum chamber, a sealing means for sealing the protrusion of the operating rod at the non-earthed metal vacuum chamber, circuit terminals protruding from the non-earthed vacuum chamber, an earth layer surrounding an outer periphery of the insulating mold, and a potential control means. The control means for controlling the potential of the non-earthed metal vacuum chamber is connected between the circuit terminals and is connected to the non-earthed metal vacuum chamber at the intermediate point of the potential control means.

A resource allocation method for a wireless energy harvesting full-duplex cooperative relay system, which consists of constructing a transmission signal model, estimating channel state prediction information, determining the power allocation coefficient α for each transmission cycle, and determining the time slot allocation for each transmission cycle The coefficient β and the outage probability P of the determination system out Step composition. Because the present invention adopts the existing full-duplex cooperative relay system, establishes a reasonable transmission signal model, proposes a resource allocation method, makes full use of limited spectrum resources, and improves the interruption performance of the system, which is different from the existing power allocation method compared to the transmit power P in each transmission cycle S When it is 0dBm ~ 20dBm, the system outage probability is reduced by 0.041 ~ 0.00084. The invention has the advantages of reasonable resource allocation, simple method, good interruption performance and the like, and can be used in the technical field of portable energy communication.

An arrangement for interrupting current comprising a first and a second terminal adapted to electrically connect two sections of a power system is provided. A voltage control means is controllable in use to inject energy into said loop to force a rapid increase of an alternating current flowing through said main branch while being controlled to open to interrupt a main current, and whereby zero cross-over of the current through the mechanical main circuit breaker is realized as the amplitude of the alternating current exceeds the amplitude of the main current. An energy absorbing device is adapted to limit the voltage across said capacitor and said mechanical breaker when the mechanical breaker is open, and across an inductive element if the voltage across the mechanical breaker breaks down, at or immediately after an opening process, thereby limiting the rate-of-rise and the peak of the current through said loop.

The present invention provides a bag with a spout. This spout-equipped bag has an spout attached to an attachment edge portion of a bag main body which has an outer edge seal portion and a pair of flow path control seal portions, the outer edge seal portion having The mounting seal is formed along the mounting edge, and heats the front and back films in a state where the mounting base of the outflow port is disposed between the front and back films of the bag body. The outflow port is installed by welding; the pair of flow path control sealing parts are formed on the inner side of the bag plane direction of the mounting seal part of the outer edge sealing part with a virtual line extending the central axis of the outflow port body On the left and right sides, in a direction perpendicular to the imaginary line, at least one of the flow path control sealing parts on the opposite side of the imaginary line is formed adjacent to the container for containing the content liquid. An unsealed part that is connected to each other.

The invention discloses a dual-routing configuration method for power optical fiber communication network services. The method includes: establishing a reasonable and effective power optical fiber communication network service transmission model G(V, E, W, Q, C) according to the actual project; sorting the services according to the importance, and configuring two complete Disjoint routing (AP, BP), the new algorithm handles the bilateral (max﹛q(ek)﹜=2) network graph according to the actual situation, and allows setting the maximum carrying traffic c(ek) of each optical cable. The method of the present invention can meet the requirements of all power services that should be configured with two completely separated paths, and ensure that the services are still safe and reliable in the case of cable breakage and other failures. In addition, the present invention can handle the double-sided network graph mapped by the double optical cables, allows setting the carrying capacity of the optical cables, meets the actual engineering requirements, and has a certain effect on balancing the network load.

The invention discloses a dynamic power allocation method for a multi-relay system based on a nonlinear energy acquisition model, aiming at minimizing the interruption probability of a target node ofthe system, joint optimization is performed on the power division coefficient of each relay node, working under the nonlinear energy acquisition model, and the transmission power, so as to seek an optimal power allocation scheme. The method comprises the following steps: according to channel state information, a signal formula received by each relay node in a first time slot is obtained; power distribution with a proportion of formula is carried out on the received signal of the kth relay node according to two modules of energy acquisition and information reception; the acquired energy formulaof the kth relay node is obtained according to the nonlinear energy acquisition model; the signal formula is transmitted to the target node according to an amplifying-forwarding protocol, so as to obtain a signal formula received by the target node in a second time slot; the instantaneous channel capacity formula of each link is calculated; the system joint outage probability formula is obtainedby calculating the instantaneous channel capacity by using a maximum ratio combining method; a final objective function to be optimized is obtained through equivalent deformation processing once; andthe optimal solution formula is obtained through calculation.