288results about "Make-before-break contact arrangement" patented technology

The invention discloses an arc-less on-load tap-changer for a transformer, which comprises at least two fixed contacts, a moving contact, a first two-way switch and a second two-way switch, wherein the fixed contacts are connected with a transformer winding, and the moving contact is connected with a winging terminal and is dragged by a motor under the driving action of a selector switch; one end of each fixed contact is respectively connected with the different taps of a transformer winding; the moving contact comprises the first two-way switch, a through contact and a second two-way switch, wherein one end of the first two-way switch, one end of the through contact and one end of the second two-way switch are fixedly connected with the winding terminal; and the other ends of the first two-way switch, the through contact and the second two-way switch of the moving contact are successively connected with the fixed contacts in the moving process. The arc-less on-load tap-changer for the transformer can realize the arc-less switch of the tap of the transformer winding, and has the advantages of low cost and reliable operation.

The invention relates to an off-circuit tap-changer for transformation after force discharging of a moving contact. The off-circuit tap-changer mainly comprises a main shaft, a gear indicating rod, a shielding cover, a gear system, a grooved pulley system, a contact support, a moving contact system, a fixed contact system and a cam system. The number of moving contact groups ranges from one to three. The off-circuit tap-changer can be used for single-phase, two-phase and three-phase loads. The off-circuit tap-changer for transformation after the force discharging of the moving contact mainly breaks through the fixed thinking mode of the structure that the contacts of a former off-circuit tap-changer directly overcomes a resistance dead point to achieve gear shifting, a brand new ground-breaking mode is adopted, the advantage that an inner grooved pulley mechanism is small in occupied space is utilized ingeniously, perfect cooperation of a gear mechanism and a cam mechanism is further utilized, it can be completely guaranteed that the moving contacts make reliable and stable contact with the fixed contacts under a normal work state of the off-circuit tap-changer, and gear shifting can be achieved easily when the off-circuit tap-changer carries out gear shifting.

The invention discloses a composite vacuum on-load tap-changer with an external selector. The composite vacuum on-load tap-changer comprises a switch oil chamber and a switch body which inserts into the switch oil chamber. The switch oil chamber comprises an insulation tube, a tap-changer installation flange fixed on a head of the insulation tube, a supporting flange and a tube bottom installed on the bottom of the insulation tube. The composite vacuum on-load tap-changer is characterized in that: the selector is installed on an outer side of the switch oil chamber insulation tube through an upper supporting arm which is connected into one body with the supporting flange and a lower supporting arm which is connected into one body with the tube bottom; the selector is driven to work through a selector driving mechanism installed on the supporting flange. According to the invention, because of the external selector, it is possible to design the switch body and the switch oil chamber into a plug-in type.

The invention discloses an on-load tapping switch of a composite switching-type transformer; the on-load tapping switch comprises a plurality of odd taps, a plurality of even taps and an outgoing line terminal, wherein the plurality of odd taps, the plurality of even taps and the outgoing line terminal are connected with a winding of the transformer; the on-load tapping switch is characterized by also comprising a first combination switch and a second combination switch, a first tapping selector and a second tapping selector, wherein a plurality of fixed contacts of the first tapping selector are respectively connected with the plurality of odd taps; a moving contact of the first tapping selector is connected with one end of the first combination switch; a plurality of fixed contacts of the second tapping selector are respectively connected with the plurality of even taps; a moving contact of the second tapping selector are connected with one end of the second combination switch; and the other ends of the first combination switch and the second combination switch are connected with the outgoing line terminal. The on-load tapping switch realizes the commutation without arcing by using the combination switches and the trigger sequential control on the combination switches and has a simple structure and is reliable in work.

A latch-release actuating apparatus includes a switch element, a base member, and a cover member. The switch element is depressed via the cover member. In the latch-release actuating apparatus, a key top member and the cover member are formed to be long to extend horizontally from an upper region of the push button. The key top member is arranged on a back surface of the cover member so that a longitudinal direction of the key top member coincides with a longitudinal direction of the cover member. Furthermore, claws and retaining portions to which the claws are retained are arranged between the base member and both longitudinal ends of the key top member, thereby constituting a regulating unit for restricting separation of the key top member from the push button when the claw abuts on the retaining portion.

The invention discloses a reactance type vacuum bar-shaped on-load tap switch comprising an insulated installing plate which is installed on a connecting base, and a bar-shaped cam which connects three slide blocks. The insulated installing plate is provided with a three-phase static contact assembly and a three-phase vacuum bubble group. The three slide blocks are slidably configured on guide rods. A moving contact installing base is fixed on each slide block. The lower ends of the three moving contact installing bases respectively extend into the three-phase static contact assembly. Multiple protrusions are configured on the bar-shaped cam in a spacing way. The protrusions drive the moving end of the vacuum bubble to move. The reactance type vacuum bar-shaped on-load tap switch is characterized in that a linear motor is installed on the connecting base. The linear motor drives one of the slide blocks to linearly move along the guide rods in a reciprocating way. The slide block also drives other two slide blocks to linearly move along the guide rods in the reciprocating way via the bar-shaped cam. According to the reactance type vacuum bar-shaped on-load tap switch, a bevel gear transmission device in the prior art is cancelled by a transmission mechanism of the reactance type vacuum bar-shaped on-load tap switch so that the structure is enabled to be simpler and cost is lower.

The invention discloses an application of an on-load tap-changer. The application is characterized in that a control device is used to detect the current signal of a transformer, after a switching control signal is inputted in the control device, the control device transmits a signal to a drive device when the current signal nearly crosses zero, the drive device controls the on/off of a vacuum tube used for transition through an executive unit, thus the no-arc transferring of the on-load tap-changer can be realized. The invention also discloses a phased no-arc transferring on-load tap-changer, thus when the current signal of the transformer crosses zero, the no-arc transition transferring of the on-load tap-changer can be realized, the service life of the transition transferring element is prolonged and the transformer oil in a transfer switch oil chamber can not be polluted.

The invention discloses a vacuum vessel switching core used by an on-load tap-changer, which can mutually exchange with the switching core of the existing M-type on-load tap-changer without changing aswitch oil chamber; the vacuum vessel switching core comprises a vacuum vessel transition switching assembly, a neutral point switch and a main through-flow assembly, wherein an upper group and a lower group of triphase cavel-shaped contacts in the main through-flow assembly are combined to put below the vacuum vessel transition switching assembly, and are connected with an original contact by soft connection; the vacuum vessel transition switching assembly is electrically connected with the original neutral point contact by the neutral point switch so as to ensure that the position of the main contact and the position of the neutral point contact do not change. The invention keeps the appearance structure and installation size of the original M-type on-load tap-changer switching core, can conveniently change the original M-type on-load tap-changer switching core on the basis of changing no other components of the original M-type on-load tap-changer, is suitable for replacing and maintaining the existing M-type on-load tap-changer used on site and is suitable for manufacturing new vacuum M-type on-load tap-changers.

A voltage-regulating capacitance-regulating tap switch adopting vacuum arc-extinguishing chambers comprises a capacitance regulating switch set and a capacitance regulating operation mechanism. The capacitance regulating switch set comprises three high-voltage double-break vacuum arc-extinguishing chambers and six low-voltage double-break vacuum arc-extinguishing chambers, the three high-voltage double-break vacuum arc-extinguishing chambers are connected with a tap contact of a transformer high-voltage side winding, and therefore conversion of star connection and triangular connection of the high-voltage side winding is achieved. The six low-voltage double-break vacuum arc-extinguishing chambers are connected with tap contacts of transformer low-voltage side windings, and therefore conversion of series connection and parallel connection of the low-pressure side windings is achieved. The tap switch further comprises two voltage regulating switch sets and a voltage regulating operation mechanism, each voltage regulating switch set comprises three double-break vacuum arc-extinguishing chambers and a voltage regulating mechanism, the three double-break vacuum arc-extinguishing chambers of each voltage regulating switch set are connected with tap contacts of a high-gear winding, an intermediate-gear winding and a low-gear winding of a transformer coil high-voltage side respectively, and therefore voltage regulation of a transformer is achieved. The voltage-regulating capacitance-regulating tap switch has the advantages of being high in safety, small in size, easy to mount and convenient to operate.

The invention discloses a crank-rocker quick mechanism which comprises an upper mounting plate and a lower mounting plate which have installation effect, wherein the upper mounting plate is connected with the lower mounting plate through a support to form a certain installation space; and the lower mounting plate is equipped with a transmission mechanism connected with the output shaft of an electric switching mechanism. The quick mechanism also comprises a groove shifting mechanism and an energy-storage crank-rocker mechanism, wherein the groove shifting mechanism is arranged on the upper mounting plate, and the output end of the groove shifting mechanism is connected with the input end of a transfer switch; the energy-storage crank-rocker mechanism is arranged in the installation space, the input end of the energy-storage crank-rocker mechanism is connected with the output end of the transmission mechanism, and the output end of the energy-storage crank-rocker mechanism is connected with the input end of the groove shifting mechanism; and when the energy-storage crank-rocker mechanism releases energy, the groove shifting mechanism is driven to run, thus further leading the transfer switch to work. Compared with the prior art, the crank-rocker quick mechanism has the remarkable advantages as follows: 1. no sliding friction, small resistance, high transmission efficiency, large rotating torque and capability of being applied to the environment with poor lubricating condition; and 2. simple structure, low mechanical failure rate and low manufacturing cost.

The invention relates to a non-excitation tapping switch used for a transformer, which comprises columnar fixed contacts installed on the circumference and insulating terminal plates installed over and under the switch. A main shaft is installed between insulating terminal plates in a penetrating manner, and linked with an operating mechanism; and ring-shaped moving contacts are installed on the main shaft in a manner of bridge connection with two adjacent columnar fixed contacts. The switch is characterized in that a contact surface of a gear-shifting running track formed by the columnar fixed contacts corresponding to the moving contacts is a smooth transition curved surface. Through the scheme that the contact surface of the gear-shifting running track formed by the columnar fixed contacts corresponding to the moving contacts is the smooth transition curved surface, the invention reduces the crowning height of the gear shifting contact surface, shortens the retraction travel length of the gear shifting of the moving contacts, reduces the integrated torque of the switch operation, improves the stability of the moving contacts in running, and reduces the gear shifting abrasion of the fixed and the moving contacts. The invention maintains the advantages of stable contact and high reliability of the original contact structure, and can meet the demands that a plurality of parallel moving contacts are needed by multi-phase or strong-current single-phase switches.

The invention relates to an unloading off-circuit tapping switch used in a transformer, comprising an upper pedestal, a lower pedestal and a rotary shaft which penetrates through the upper and lower pedestals, the rotary shaft is provided with a support piece and a moving contact assembly, an insulator is linked between the upper pedestal and the lower pedestal, a fixed contact configured corresponding to the moving contact assembly is mounted at the inner side of the insulator, the difference lies in the fact that an outer insulating cylinder is mounted on the periphery of the insulator, theouter insulating cylinder is provided with spaced connecting terminals, an inner end of the connecting terminal is linked with a leading-out terminal on the insulator via a linkage conductor, the leading-out terminal is connected with the fixed contact, and two adjacent connecting terminals are distributed in an axially and vertically staggered manner. The invention dramatically ameliorates electric field distribution of the switch at the same time of unloading, and the adjacent connecting terminals are distributed on the outer insulating cylinder in an axially and vertically staggered manner,thus further improving insulating level of the adjacent terminals; the invention is simple and compact in structure as well convenient for manufacturing and installation, The invention is suitable for tapping switches of high voltage and large current in particular.

The invention relates to a contact structure of an excitation-free tapping switch used for a transformer. The contact structure comprises an upper switch support, a lower switch support, a main shaft arranged between the two switch supports, a supporter arranged on the main shaft, columnar fixed contacts alternately arranged between the two switch supports along the circumferential direction, and ring-shaped moving contacts which are arranged between each two adjacent fixed contacts and sheathed on the supporter and matches with a radial sliding pin and a spring that are arranged on the supporter. The contact structure is characterized in that a lateral shifter is arranged on each side of the supporter corresponding to the pores of the ring-shaped moving contacts. When the switch is shifted, the ring-shaped moving contacts are pushed to rotate to a predetermined direction by a rotation moment formed under the combined action of the external fixed contacts and the internal lateral shifters, such push can reduce the rotation moment during operating the contact to shift the switch, so as to easily complete the tap changing of the switch, and such effect is especially distinct when the number of the switch moving contacts is large or the chord length among the fixed contacts is increased.

The invention discloses an integrated plug-pull combined type vacuum on-load tap changer, which comprises a changer oil chamber and a changer body inserted in the changer oil chamber. The changer oil chamber comprises an insulating cylinder and a tap changer installation flange fixed at the head of the insulating cylinder, a support flange, and a cylinder bottom for installing the bottom of the insulating cylinder. Stationary contact terminals are installed on the cylinder wall of the insulating cylinder. The changer body comprises a support cage body provided with stationary contacts, a quick mechanism arranged at the head of the support cage body, an insulating spindle connected with the quick mechanism and vacuum switch components. The stationary contacts and float contacts electrically connected with the stationary contacts are arranged on cage plate strips of the support cage body, the float contacts are electrically contacted with the corresponding terminals, and movable contacts of the vacuum switch components are in contact with the stationary contacts in switching. The integrated plug-pull combined type vacuum on-load tap changer has the advantages that the tap changer is convenient to debug and install; and when the tap changer is maintained, a transformer cover is not required to be opened, transformer connection lines are not required to be dismounted, and only the changer body is lifted out.

The invention discloses a manual driving mechanism of an off-circuit tap-changer. An input terminal of a two-stage sheave deceleration transmission mechanism of an internal transmission mechanism possesses a hand crank rotation shaft. A hand position indicator dial is fixed on a first stage output shaft of the two-stage sheave deceleration transmission mechanism and rotates with the first stage output shaft synchronously. A gear indicator dial is fixed on a second stage output shaft of the two-stage sheave deceleration transmission mechanism and rotates with the second stage output shaft synchronously. A main transmission output shaft is shaftingly arranged in a box. An output terminal of the main transmission output shaft extends out of the box, and the input terminal and the hand crank rotation shaft form power connection through a bevel gear pair. By using the mechanism of the invention, shift operation of a transformer tap-changer is convenient. The tap-changer can change 1shift only through rotating of 10 laps. Hand-operated force and a number of laps are moderate. The mechanism of the invention is fully functional and possesses functions of cutting off electricity through inserting the hand crank, observing an operation signal, detecting an in-gear signal, recording shifting counting and the like.

The invention provides a double-high and low voltage on-load regulating transformer, which belongs to the technical field of transformer manufacturing and solves the problem that the voltage class in the prior art is not suitable for the application of 72KV and 138KV in North American markets. A system comprises an oil tank, a main transformer and a regulating transformer, wherein the main transformer and the regulating transformer are arranged in the oil tank; the main transformer comprises a main transformer core; the main transformer core is provided with a main transformer high-voltage coil, a main transformer low-voltage coil and a low-voltage regulating coil from outside to inside in sequence; the main transformer high-voltage coil is divided into two branch coils which are connected through a high-voltage serial parallel switch; the regulating transformer comprises a regulating transformer core; the regulating transformer core is provided with a regulating transformer parallel coil and a low-voltage serial coil from outside to inside in sequence; the low-voltage serial coil of the regulating transformer is connected in series with the main transformer low-voltage coil; and the regulating transformer parallel coil of the regulating transformer and the low-voltage regulating transformer coil are connected in parallel through a low-voltage on-load regulating switch. The system can be suitable for two different voltage classes, and can also simplify traditional structures and reduce the cost.

The invention relates to the field of voltage stabilization electric equipment for electric lines with the voltage below 35 kV, in particular to a 36-level high-precision capacitance and voltage adjusting transformer for a distributing line. The capacitance and voltage adjusting transformer comprises a low-voltage winding and a high-voltage winding; a star connection method is adopted in the low-voltage winding, and each phase is divided into a low-voltage main winding and a low-voltage voltage adjusting winding which are connected in series; an edge extending triangular connection method is adopted in the high-voltage winding, and each phase is divided into a high-voltage main winding and a high-voltage voltage adjusting winding, wherein the high-voltage main winding is connected in a triangular shape, and the high-voltage voltage adjusting winding is located between the vertex of the triangle and the power source end; each low-voltage voltage adjusting winding is provided with an on-load capacitance adjusting switch, each high-voltage voltage adjusting winding is provided with an on-load voltage adjusting switch, and all the on-load capacitance adjusting switches and all the on-load voltage adjusting switches are independently controlled by a controller. All the windings can be independently controlled, and balance of the output voltage is ensured. The capacity of the transformer is changed through actions of a tap switch, connecting groups are not changed any more, and harmonic waves are effectively eliminated.

The invention provides an on-load capacity-regulating switch with a single fracture, aiming at solving the technical problems that the switching task of transformer windings needs to be finished when a transformer is on load and overcoming the technical difficulty of unreliable arc quenching when a high-voltage side contact is subjected to star-to-angle switching. The on-load capacity-regulating switch is mainly characterized by comprising two main contact connecting wires and a transitional contact connecting wire, wherein a transitional resistor and a second vacuum arc-quenching chamber areconnected to the transitional contact connecting wire in series; one main contact connecting wire is an angle-joint main contact connecting wire provided with a first vacuum arc-quenching chamber, and the other main contact connecting wire is a star main contact connecting wire provided with a third vacuum arc-quenching chamber; and the on-load capacity-regulating switch is also provided with a driving device for driving all the vacuum arc-quenching chambers. The on-load capacity-regulating switch has the advantage that the arc quenching can be reliably realized just by arranging one fracture.

This invention relates to a method, an apparatus, an electronic device, a system, and a computer program product for selecting at least one component out of at least one maintenance component and at least one non-maintenance component, wherein said at least one maintenance component and said at least one non-maintenance component represent electronic components arranged in an apparatus; and switching an external connector of said apparatus to said at least one selected component.

The invention discloses a transformer split-type arcless on-load tap switch, which comprises a plurality of singular taps connected with a transformer winding, a plurality of double taps, and a changeover switch moving contact which is connected with an outgoing line terminal and is dragged by a motor under the drive of the changeover switch, and further comprises a first two-way switch and a second two-way switch, and a first tapping selector and a second tapping selector, wherein a plurality of static contacts of the first tapping selector are respectively connected with a singular static tap of the transformer winding; the moving contacts of the first tapping selector are respectively connected with one end of a first straight-through contact and one end of the first two-way switch; a plurality of static contacts of the second tapping selector are respectively connected with the double taps of the transformer winding, and the moving contacts of the second tapping selector are respectively connected with one end of the second two-way switch and one end of a second straight-through contact. The transformer split-type arcless on-load tap switch can realize the arcless changeover of the taps of the transformer winding, is low in cost and reliable in operation.

An engageable drive engageable operating mechanism for converting a movement of a linear translation operating handle to a rotating handle movement relative to the operative front face engageable with a molded-case circuit breaker. The mechanism includes an external rotating adapter external rotating operating member or alternatively an engageable drive engageable operating mechanism incorporating a handle assembly external rotating operating member, interchangeable with each other; and a gear, a support movable movement-converting support including a rack portion, and a structural support base, wherein the structural support base includes a built-in side opening chamber.

The invention discloses a high-low shifting column change-over switch which comprises an installation board, a change-over switch, a guide rod, and a high-low shifting column disc. The change-over switch is fixed on the installation board, the guide rod is connected with the installation board, the high-low shifting column disc can slide relative to the guide rod, the guide rod transmits required rotation relation to the high-low shifting column disc and is in contact with the change-over switch, and the change-over switch comprises a shell, two contact bridges, a shifting fork, a first contact and a second contact. The high-low shifting column change-over switch has the advantages of simple and small structure, practical function, accurate in-place action and higher-capacity contacts, and powerfully ensures the working reliability of an immersed vacuum on-load tapping switch; and moreover, the used parts have good standardization and interchangeability and can be processed easily, which is favorable to the batch production of the high-low shifting column change-over switch.