1297 results about "Vacuum interrupter" patented technology

A power circuit interrupter includes a housing having an opening, one or more vacuum interrupters including separable contacts, and an operating mechanism, supported by the housing, adapted to open and close the contacts. A linear actuator cooperates with the operating mechanism to open and close the contacts, and is responsive to a close signal to close the contacts. A pivotable trip member protrudes through the opening of the housing and cooperates with the operating mechanism and the linear actuator to open the contacts when pivoted from a first position to a second position. A close circuit includes an input inputting the close signal. A micro-switch includes an operator and a contact electrically connected in series with the input of the close circuit. The operator is engaged by the pivotable trip member to open the contact in response to partial pivoting thereof from the first position toward the second position.

The disclosure relates to a method for producing circuit-breaker parts and plastic components for low, medium and high-voltage switching stations and to a corresponding circuit-breaker part. To obtain a simpler method of production with a higher variance of material characteristics, the outer insulation sleeve is produced in a plastic injection molding method, in which a vacuum interrupter chamber is sheathed in plastic.

The invention relates to a spring actuating mechanism of a vacuum circuit-breaker, which comprises a frame, and is characterized in that an energy storage component is arranged on the middle part of the frame; a handle closing connecting rod component is arranged on the left side of the middle upper part of the frame; a hand opening connecting rod component is arranged on the right side of the middle upper part of the frame; a hand energy storage component is arranged on the middle lower part of the frame; an electric energy component is arranged on the lower part of the frame; and an electromagnet component is arranged on the upper part of the frame. The spring actuating mechanism has the advantages that the inner space of the actuating mechanism is fully utilized; the assembled positionsof parts are accurate; the integration of the actuating mechanism is realized; driving parts are reduced; the driving process is simplified; the reliability and the stability of the mechanism are greatly increased; the visible adjustment of the lock joint amount can be easily realized; the closing and opening resistance failures of the circuit-breaker in the working process can be avoided; a reliable and safe interlocking device is provided; and the standard is only.

Disclosed is a main switch conveying apparatus for a vacuum circuit breaker. The main switch conveying apparatus for a vacuum circuit breaker installed in a cage having electrical load and source terminals, the main switch conveying apparatus includes a carriage for conveying the main switch loaded on the carriage in such a manner that the main switch is coupled to or separated from the terminals, a carriage actuating assembly including a lead screw for providing a driving force to move the carriage and provided with braking recesses at the predetermined positions on the lead screw in such a manner that the carriage is stopped at a test position, a safety position and a run position of the main switch, and a conveying nut fixed on the carriage to mesh with the lead screw and movable together with the carriage relatively to the lead screw, a girder assembly detachably supported on both front sidewalls of the cage for supporting one end of the lead screw to rotate, a brake assembly installed on the carriage for stopping the carriage by locking the lead screw at positions of the braking recesses; and a brake releasing assembly for releasing the locking of the brake assembly. The carriage having the main switch loaded thereon moves along the lead screw, while allowing the main switch to be positioned in the safety, test and run positions of the main switch. The user easily recognizes the position of the main switch. If the main switch conveying apparatus is inversely operated, the movement of the main circuit is stopped so that the main circuit is precisely and rapidly moved.

The invention discloses a motor train unit line-side circuit and a control method thereof. The motor train unit line-side circuit comprises two motive power units in the same structure, wherein the two motive power units are connected through an isolation switch branch circuit, the isolation switch branch circuit is formed by serially connecting two isolation switches, and both ends of the isolation switch branch circuit are respectively connected to a position between a primary side current transformer and a vacuum circuit breaker of the two motive power units. The line-side circuit is a basically symmetrical circuit, the circuit type is simple, the equipment arrangement and the wire distribution are simple, the circuit control is easy to realize, and in addition, the train operation reliability is very high.

The invention discloses a novel inflatable switch cabinet which comprises a cabinet body. A gas tank is arranged on the rear side of the cabinet body, a control chamber is arranged on the upper portion of the front side of the cabinet body, a cable chamber is arranged on the lower portion of the front side of the cabinet body, a vacuum breaker is arranged on the upper portion of the gas tank, an isolating switch is arranged in the middle of the gas tank, a main loop is arranged on the lower portion of the gas tank, and an isolating switch operating mechanism and a vacuum breaker operating mechanism are arranged in the control chamber. The isolating switch operating mechanism achieves switch-on, switch-off and ground connection of a disconnecting link by operating a first operating shaft and a second operating shaft, and power-driven operation can be achieved. The vacuum breaker comprises an insulation support, a vacuum bubble and an operating main shaft, the vacuum bubble is arranged in the insulation support in the mode with an upward dynamic contact, a conductive contact and a conductive piece are fixedly arranged on the lower portion of the insulation support and are fixedly connected with a static contact at the lower end of the vacuum bubble, the conductive contact and the disconnecting link are matched for switch-on, and the operating main shaft drives the dynamic contact at the upper end of the vacuum bubble to vertically move to achieve switch-on and switch-off of the vacuum breaker. The novel inflatable switch cabinet is compact in structure, reliable in motion, safe in use and convenient to maintain.

A circuit interrupting device has a circuit interrupter with a stationary contact and a moveable contact. The movable contact is movable relative to the stationary contact between a closed position that allows current to pass through the circuit interrupter and an open position separating the contacts and preventing current from passing through the circuit interrupter. The movable contact is controlled by a solenoid assembly. The movable contact is connected to a plunger of the solenoid assembly by a turnbuckle and weld break assembly. The turnbuckle and weld break assembly permits adjusting the contact wipe distance and generates a hammer force to break any welds between the contacts of the vacuum interrupter.

Aiming at the condition that primary line current and voltage are not easily monitored by a sensor due to high voltage and large current when a high voltage circuit breaker works online, the invention provides an online monitoring method and an online monitoring device of a high voltage vacuum circuit breaker. The method comprises the steps of: using a displacement sensor directly connected with a moving contact of the high voltage circuit breaker to collect a stroke signal of the moving contact; calculating characteristic points on a stroke curve through a series of filtering and correction; and analyzing the characteristic points to calculate relevant parameters so as to judge the work condition of the circuit breaker online. The online monitoring method and device provided by the invention effectively monitor the high voltage circuit breaker online and can resist the monitoring environment of high voltage and large current. As the displacement sensor directly connected with the moving contact of the circuit breaker is just used as a unique signal collecting device in the invention, the problem of difficulty in implementation and high cost caused by the fact that high voltage resisting voltage or current sensors are needed to be used on a primary side line is solved.

An encapsulated vacuum interrupter with grounded end cup and drive rod is disclosed. The double break vacuum interrupter includes a first contact system including an annular stationary contact which is engaged by a primary moving contact with the moving contact drive rod extending through the primary moving contact and through the opening of the annular stationary contact. A second contact system includes a secondary moving contact placed on the end of the moving contact rod, which engages and operates a floating contact, which moves along the same axis. A mechanical adjustment system is provided for the floating contact. A coaxial moving contact drive rod system is provided. With the encapsulated vacuum interrupter, the lower portion of the vacuum envelope is insulated from the current path, which allows for the elimination of the long internal cavity in the encapsulation as the lower end cup of the vacuum envelope may be grounded.

A shielded encapsulated vacuum interrupter with a ceramic vacuum chamber and opposing conductive end caps is provided. One end cap is electrically connected to a fixed contact, while an opposing end cap is connected to a moving contact. The moving contact is actuatable with the fixed contact for opening or closing an electric circuit. A floating shield inside the vacuum chamber connected to the vacuum chamber ceramic wall and spaced from the fixed and moving contacts is isolated and has a floating voltage potential. A portion of the vacuum chamber exterior ceramic wall is coated with a semi-conductive material and conductive voltage screens enclose a portion of the vacuum chamber exterior and are electrically connected to each conductive end cap of the vacuum chamber. The chamber and connected screens are encapsulated in a molded dielectric housing.

The invention provides a double coil variable current control circuit for vacuum circuit breaker permanent magnet mechanism; in the closing process, an opening coil is negatively electrified, which partially neutralizes the permanent magnet holding force, reduces the closing motion current, simultaneously regulates the current in the closing coil and lowers the kinetic energy and the impact speed of the iron core on the premise of ensuring the closing speed; in the opening process, the opening coil is positively electrified, the closing coil is negatively electrified or the opening coil is positively electrified, the closing coil is positively electrified; the voltages and currents in the opening coil and the closing coil are sampled by the coil current measuring module, and the collected data are fed back to a central control module which can calculate the current change rates of the present coils and regulate the current value in the opening coil based on the result; by feeding back samplings of the voltages and currents in the opening coil and the closing coil of the permanent magnet mechanism, the invention can regulate the current amplitude in coils and makes a reasonable fit between the operating characteristics of the permanent magnet mechanism and the counterforce characteristics of the circuit breaker.

A vacuum breaker is adopted for use on a water discharge end of a flush valve in a water supply piping system. It includes a valve which has a valve seat with a hollow section to house a plug. The plug is movable up and down under water pressure and a spring on the bottom to actuate flushing or stop flushing. The vacuum breaker further includes a coupling duct and a bushing housed in the coupling duct that is made from a flexible material. The coupling duct has a plurality of apertures near the top end. The outer wall of the bushing and the inner wall of the coupling duct form a gap therebetween. During flushing, the wall of the bushing is expanded outwards under water pressure to close the apertures to stop water overflow through the apertures. When the flushing stops, external air can enter through the apertures and the gap between the coupling duct and the bushing to balance the internal and external pressure and eliminate vacuum, and prevent back siphonage from occurring.

The invention relates to a vacuum isolation breaker with a vertical rotating type and compound functions. The breaker consists of three phase terminal posts, an operation component and a hand frame. The three phase terminal posts with a vertical arrangement are connected into an integration through a vertical rotated beam, and a vacuum interrupter in the terminal post are wrapped (fixedly) by compound insulating materials which are mainly composed of epoxy resin, and two terminals of the terminal post are provided with a mobile contact terminal and a still contact terminal which can be connected with a main circuit. The vertical beam is hinged and arranged on the hand frame, and a connecting bar for driving the mobile contact terminal of the vacuum interrupter is arranged in the vertical beam. An integrated operation component including internally a breaker operation device, an isolation switch operation device, a mechanical interlocking device and a control device is arranged in the front of the hand frame, and the integrated operation component not only can drive the connecting bar device to have a linear motion and cause a making and a breaking of the contact terminal in the vacuum interrupter with the circuit, but also can cause the three phase terminal posts to have forward and backward rotations with 90 degrees and drive the connecting terminals on the two terminals to have a breaking or a connection with the circuit. The products have the advantages of compacted structure, easy maintenance and safe operation etc., and are more particularly fit for cubicle switchboards.

The utility model relates to a production process for a xerogel of high voltage vacuum circuit breaker, which is characterized in that a high temperature vulcanizing silicone rubber is adopted as a transitional material between epoxy resin and a porcelain housing of the a vacuum interrupter chamber, and adhesive is applied evenly on the connecting planes between the vulcanizing silicone rubber and the porcelain housing of the vacuum arcing chamber and between the vulcanizing silicone rubber and the epoxy resin. The process comprises two parts: first, the arcing chamber of the high voltage vacuum breaker xerogel is made by using vulcanizing process, second, the integration formation of the high voltage circuit breaker xerogel is made by utilizing an APG expoy resin winding injection process. The utility model has advantages of simple process, good insulation and reliable operation and strong acclimation capability of the produced product. The utility model is applicable to the production enterprises of the xerogel vacuum circuit breaker.

The invention discloses a quick control mechanism of an ultrahigh pressure vacuum circuit breaker and a control method thereof. The control mechanism comprises a permanent magnet control mechanism and an eddy repulsion mechanism, wherein the permanent magnet control mechanism is in an unsymmetrical structure mode, and can better cooperate with the counter-force characteristic requirement of the ultrahigh pressure vacuum circuit breaker; the eddy repulsion mechanism can generate instantaneous repulsion and quicken the opening/closing operation of the ultrahigh pressure vacuum circuit breaker. The control method is as follows: during closing, a closing coil is electrified with forward current, and an opening coil is electrified with reverse current; meanwhile, pulse current is applied on a closing eddy current coil; during opening, the opening coil is electrified with forward current, the closing coil is electrified with reverse current; and meanwhile, the pulse current is applied on anopening eddy current coil. In the invention, the unsymmetrical permanent magnet control mechanism and the eddy repulsion mechanism are adopted to realize the quick action of the mechanism and satisfythe repulsion characteristic requirement of the ultrahigh pressure vacuum circuit breaker.

The invention relates to an alternating current high-voltage vacuum circuit breaker, which is characterized in that the invention comprises a case body, a vacuum arc extinguish chamber is seated and connected to the case body, an electromagnetic repulsive force mechanism is disposed in the case body, the mechanism comprises an open coil and a close coil which form a fixed gap, a repulsion disk arranged in the gap, a repulsion rod which is fixedly penetrated by the equipped repulsion disk, a retention capacity rod of a composite disc spring retention force structure connected with the lower end of the repulsion rod, a catch spring fixed on the retention force rod and at least two pieces of disc springs top-arranged on the catch spring. The upper end of the electromagnetic repulsive force is connected with a closing buffer gear which comprises a spring frame structure and a hydraulic cylinder, further, the closing buffer gear comprises an intelligent pulse generator. Because the invention employs the electromagnetic repulsive force mechanism, employs bi-stable composite disc springs to retain, employs the closing hydraulic pressure buffer gear to inhibit closing bouncing, and employs a photoelectric sensor to realize position returning, thereby belonging to the advanced design at home and abroad, therefore, the invention can be widely applied to the field of fault current limiters, phase selection switches, solid change-over switches and the like.

The invention discloses a box-sharing gas-insulated metal enclosed switching device. An upper sealed air box and a lower sealed air box are arranged in a cabinet body; a three-position isolating switch, a main bus casing and a main bus are arranged in the upper air box; an output shaft of a three-position spring operating mechanism extends into the upper air box and is connected with the three-position isolating switch through a rotary sealed connector; the three-position isolating switch is connected with a vacuum circuit breaker in the lower air box through a bus connector; the vacuum circuit breaker is connected with a spring mechanism through a metal corrugated pipe sealing mechanism; the vacuum circuit breaker is connected with an inner conical insulator which is sealed and fixed on the wall of the lower air box through a lead; and the inner conical insulator is inserted into a voltage transformer, a cable joint, a zero sequence transformer and a lightning arrester respectively. The switching device has the characteristics of good sealing effect, long service life, small size and wide application range and is safe and reliable.

A high-voltage combined electrical apparatus is disclosed, which overcomes the following problems that: in the existing high-voltage combined electrical apparatus, an insulating sleeve has the dangers of leakage and explosion; the on/off induced current and the on/off bus transfer current of a three-position switch and a quick grounding switch are very difficult, so that the SF6 gas excellent in insulation property must be used; and a high-voltage circuit breaker is high in stress as being arranged in a high-pressure force gas. The high-voltage combined electrical apparatus has the following characteristic and advantages that: (1) all dry air or nitrogen is used as the insulating gas, so that the electric apparatus can be used under the condition of low temperatures; (2) a solid insulating sleeve is employed without the dangers of leakage and explosion; (3) the three-position switch and a high-voltage vacuum circuit breaker are designed to have a cordwood structure, so that the switch and the breaker can be plugged in flexible and a plurality of structure proposals are realized; and (4) the three-position switch and the quick grounding switch are characterized in that an opening spring is used as the power for quickly opening the isolating switch and the quick grounding switch, thereby achieving the purposes of the on/off induced current of the three-position switch and the on/off bus transfer current of the quick grounding switch.

A vacuum envelope is for a fixed contact mounted on a fixed electrode and a moveable contact mounted on a moveable electrode. The vacuum envelope includes a ceramic tube including a first open end and a second open end. A first end member is secured to the first open end. A second end member includes an inside surface and is secured to the second open end. A self-aligning end shield includes a first end having an opening therein, a second open end, an intermediate portion disposed between the first end and the end shield second open end, and a flange portion disposed from the end shield second open end. The flange portion extends outwardly from the intermediate portion and generally back toward the first end. The flange portion includes an edge engaging the inside surface of the second end member, and is normally offset from the ceramic tube.

The invention discloses a high-voltage double-break circuit breaker. The high-voltage double-break circuit breaker comprises circuit breaker casings and driving mechanisms, wherein two arc extinguishing chambers are symmetrically arranged in the circuit breaker in a left and right manner, a certain distance is formed between the arc extinguishing chambers, movable cover-plate ends of the arc extinguishing chambers are oppositely arranged, a fixed contact and a movable contact are arranged in each arc extinguishing chamber, the movable contacts are electrically connected with each other and are connected with one ends of connecting-rod mechanisms, and the fixed contacts are led out of the arc extinguishing chambers; the driving mechanisms are connected with the other ends of the connecting-rod mechanisms at the same position through insulated tension rods, the driving mechanisms drive the insulated tension rods to move up and down so as to drive the connecting-rod mechanisms to synchronously move, and further the gathering movement and the separating movement of the movable contacts and the fixed contacts are synchronously realized, wherein the leading-out terminals of the two fixed contacts are used as the circuit access terminals of the circuit breaker. The high-voltage double-break circuit breaker disclosed by the invention solves the problem that the switching voltage of vacuum circuit breakers is not high, and besides, the time for opening or closing a brake is shortened; the mechanical structure is simple, and the reliability of the circuit breaker is improved.

The invention provides an efficient gas insulated electrical machinery, capable of preventing the insulativity of the insulated electrical machinery from being aggravated by using gases containing CF3I as an insulated gas having small warmer coefficient. The device includes: a sealing container for enclosing an insulated gas; a vacuum circuit breaker and cutter, which are mounted in the sealing container and are electrical-insulated with the sealing container, characterized in that, the vacuum circuit breaker is able to prevent the arc light from leaking out the vaccum container when the current is turned off, the insulated gas is a mixed gas comprising CF3I having volumetric ratio of over 40% and the other insulated gas having lower condensing temperature than CF3I and smaller earth warmered coefficient than SF6, the air pressure of the mixed gas is 0.1-0.3 MPa.abs, moreover, there is provided with an adsorbent, which can adsorb a low-molecular-weight compound produced by the dissociation of CF3I.

The invention discloses an intelligent high-pressure vacuum circuit breaker, which is provided with an intelligent observing and controlling device. The intelligent observing and controlling device is provided with an intelligent core device as a microprocessor; an operating mechanism and a vacuum circuit breaker body are of an integral structure; the operating mechanism and a vacuum arc extinguish chamber are arranged in front and back; and the vacuum arc extinguish chamber is longitudinally arranged in a tubular insulating cylinder. Through the technical scheme of the invention, dynamic monitoring on various parameters of current, voltage, operating positions, working environment, states and the like is realized, on-line state detection is carried out on a device, intelligent diagnosis, control and protection are carried out on the core control device, and analysis and process can be carried out on monitored data; maintenance is little or free; functions of automatic protection, automatic regulation, running state monitoring, intelligent operation, communication and the like are achieved; and a comprehensive solution is provided for the intelligentization of the high-pressure vacuum circuit breaker.