517 results about "Transfer switch" patented technology

The invention relates to a coupled inductor current-limiting type hybrid direct-current circuit breaker topology and a working method. The coupled inductor current-limiting type hybrid direct-current circuit breaker comprises a current-carrying part and a breaking part, the current-carrying part is formed by connecting an ultra-fast mechanical switch UFD and a load change-over switch LCS in series, the breaking part comprises a bridge circuit, a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit and a sixth branch circuit, the fourth branch circuit is formed by connecting a thyristor, a coupling inductor and a primary side inductor in series to form a current-limiting branch circuit, and the fifth branch circuit is formed by connecting a secondary side inductor and a secondary side inductor. The sixth branch is formed by connecting a secondary side inductor of a coupling inductor with a thyristor in series and then connecting the secondary side inductor with a capacitor in parallel; the current limiting of the fault current is realized through the fourth branch, the fault breaking of the primary side inductor of the coupling inductor of the fourth branch is completed through the coupling effect of the secondary side inductor of the coupling inductor of the sixth branch, the peak value of the fault current is obviously reduced, and the breaking time is obviously shortened; the circuit breaker can quickly respond to faults of three working modes of current limiting breaking, reclosing and small current breaking; and the breaking part of the circuit breaker adopts the thyristors instead of the IGBTs, so that the cost of the circuit breaker is reduced.

The invention relates to a load transfer switch (1) for a load tap changer (2), comprising at least one vacuum interrupter (30), a handling element (50) which is mechanically connected to the vacuum interrupter (30) on a first end (51) and has a roller (53) on a second end (52), a handling body (10) which has a base body (11) and at least one cam (20), wherein the vacuum interrupter (30) is handled via the handling element (50) by the roller (53) being driven over the handling body (10), at least one part (21) of the cam (20) having a higher strength than the base body (11).

The invention relates to a load tap changer (10) for switching over between winding taps (N1,..., N J ,..., N N ) of a regulatable transformer (1) without interruption, comprising at least one selector unit (30) for preselecting to a selected winding tap (N J ) without power, at least one load switching unit (40) for actually load switching from a previous winding tap (N J _i) to the preselected winding tap (N J ), at least one gear mechanism (50) with a first gear wheel (31) and a second gear wheel (41), wherein the first gear wheel (31) is assigned to the selector unit (30) and the second gear wheel (41) is assigned to the load switching unit (40), a drive shaft (60) which is actuated by a motor drive (70), the first gear wheel (31) and the second gear wheel (41) are directly in mechanical action connection with each other, so that the gear wheels (31, 41) can be actuated simultaneously, the drive shaft (60) can drive the first gear wheel (31) or the second gear wheel (41).

A resistance and inductance current-limiting hybrid high-voltage direct-current circuit breaker topology and a control method thereof. The current-carrying branch of the topology is composed of a UFD and a load transfer switch LCS in series, and the two ends are respectively connected with DC line interfaces. The commutation branch is divided into two pairs, and each group of commutation branch is composed of a thyristor and a plurality of diodes in series. The transfer branch is composed of an IGBT and a thyristor in series. The current-limiting branch is composed of three parallel branches, including a branch composed of a thyristor, a plurality of diodes in series, and a reverse-parallel thyristor connected with a capacitor in series, a reverse-parallel thyristor branch, and a branch composed of an inductor connected with a resistor in parallel and a thyristor in series. The charging branch is composed of a capacitor connected with a thyristor in series and grounded. The breaking branch is composed of an IGBT and a metal oxide arrester MOA in parallel. Based on the thyristor commutation cooperation, the use of a large number of thyristors is reduced, and the cost is reduced under the characteristics of meeting the voltage and current resistance.

The utility model relates to the technical field of electrical control, in particular to a mobile square cabin electrical control box, which comprises a power supply module, a motor driving module, a control module and a connecting module, and is characterized in that the power supply module is respectively connected to the motor driving module and the control module through the connecting module; the power supply module comprises a battery pack, a mains supply access interface, an inverter and a switching power supply, the connection module comprises a power supply interlocking change-over switch, a grounding terminal strip and an air conditioner, the mains supply access interface is connected to the inverter, one path of output end of the inverter is connected with the base station equipment, and the other path of output end of the inverter is connected with the power supply interlocking change-over switch. According to the utility model, through the first interlocking change-over switch and the second interlocking change-over switch, the flexible switching between the commercial power and the power supply of the battery pack is realized, and the working continuity of the mobile square cabin in various environments is improved.

A power supply apparatus (100) comprises an inverter (110), voltage and current measuring devices (120a, 120b), a temperature sensor (130), and an operation circuit (140). The inverter (110) comprises change-over switches (SW1-SW6). The voltage and current measuring devices (120a, 120b) are configured to measure the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6). The temperature sensor (130) is configured to measure an initial temperature (T[0]) in an initial state. The operation circuit (140) is coupled to the voltage and current measuring devices (120a, 120b) and the temperature sensor (130). The operation circuit (140) is configured to: execute a power model (142), and calculate a first transient power of the change-over switches (SW1-SW6) on the basis of the initial temperature (T[0]), the voltage (V1), and the current (I1); and execute a thermal model (144), and calculate a first transient ideal temperature of the change-over switches (SW1-SW6) on basis of the first transient power. The power supply apparatus (100) calculates, in real time, the transient temperature of channel interfaces of the change-over switches (SW1-SW6) by measuring the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6) of the inverter (110). The present invention also relates to a temperature measurement method (500) for a power supply apparatus, and an electrical system (ES1).

This application provides a changeover switch and a coffee machine. The changeover switch includes: a mounting bracket assembly fixed to the body of the coffee machine; a rotating assembly rotatably mounted on the mounting bracket assembly, having an initial position, a first working position, and a second working position; a control assembly connected to the rotating assembly, used to drive the rotating assembly to rotate, thereby switching the rotating assembly from the initial position to the first working position or the second working position, and from the first working position back to the initial position; a reset assembly mounted on the mounting bracket assembly, used to automatically switch the rotating assembly from the second working position to the initial position; and a positioning assembly mounted on the mounting bracket assembly, used to position the rotating assembly from the first working position, so that the rotating assembly remains in the first working position. The changeover switch of this application can automatically reset to the initial position when in the second working position without user operation, improving the user experience.

The embodiment of the utility model provides an energy storage indicating piece and a dual-power-supply change-over switch. The energy storage indicating piece is suitable for being rotatably arranged on a support of the dual-power-supply change-over switch and can be driven by a main spring assembly of the dual-power-supply change-over switch, and the energy storage indicating piece comprises a rotating part which is rotatably arranged on the support; the matching part is coupled to the rotating part and can be matched with a matching shaft of the main spring assembly so as to be driven by the matching shaft; and the indicating part is arranged on the rotating part in a manner of deviating from the matching part and comprises an energy release indicating mark and paired energy storage indicating marks, and the energy release indicating mark is positioned between the paired energy storage indicating marks.

The utility model discloses a factory power supply control system based on an uninterruptible power supply (UPS), which adopts two sets of UPS equipment to supply power to a field DSC system load in a centralized manner, replaces a traditional dispersed UPS independent power supply mode, and saves the investment of the UPS equipment of each site on site. And the concentration of the UPS equipment facilitates the management, maintenance and monitoring of the equipment, and fault hidden dangers can be found and eliminated in time through background monitoring. Meanwhile, storage battery maintenance and UPS equipment maintenance problems are considered in the design, a parallel operation mode is adopted, when one set of UPS equipment is out of fault, the other set of UPS equipment is seamlessly connected with a conversion power supply for power supply through STS static change-over switches of all sites on site, load disturbance-free and uninterrupted power supply of the DCS on site is achieved, the maintenance efficiency of the equipment is effectively improved, and the service life of the UPS equipment is prolonged. And stable operation of an enterprise production control system is ensured, production is not interrupted, and production cost is reduced.

This enables the detection of abnormal opening of the changeover switch. [Solution] The electric vehicle comprises a power storage device, a motor for driving with a three-phase open winding, a first inverter connected to a power line to which the power storage device is connected and connected to one end of the three-phase open winding and having a first upper arm and a first lower arm, a second inverter connected to the power line on the opposite side of the power storage device from the first inverter and connected to the other end of the three-phase open winding and having a second upper arm and a second lower arm, a changeover switch provided between the first and second inverters in the power line, and a control device that controls the first and second inverters and the changeover switch. The control device determines an open-circuit abnormality of the changeover switch when the changeover switch is in the ON state and the first and second inverters are being switched on, and it confirms that the absolute value of the zero-sequence current, which is the sum of the phase currents of each phase, is greater than or equal to a threshold.

The embodiment of the utility model provides a buffer device for a change-over switch and the change-over switch. The buffer device comprises at least one buffer coupled to a rack of the change-over switch; and at least one adapter rotatably disposed between the at least one buffer and the output shaft of the mechanism of the transfer switch, and each of the at least one adapter includes: a rotating portion rotatably coupled to the rack; the input end is arranged on the first side of the rotating part in the radial direction and protrudes out of the rotating part in the first radial direction, so that the input end is in contact with the output shaft in the mechanism action period of the change-over switch and is pushed by the output shaft to drive the adapter to rotate around the rotating part; and the output end is arranged on the second side of the rotating part in the radial direction and protrudes out of the rotating part in the second radial direction so as to compress the corresponding buffer when the adapter rotates around the rotating part. Therefore, the action speed of the mechanism can be reduced, and the impact strength between the contacts can be weakened.

This invention discloses a switching circuit and control method for a vacuum on-load tap changer, belonging to the field of tap changer technology. The switching circuit of this invention includes: a main current-carrying switch M1, a main current-carrying switch M2, a changeover switch T, vacuum circuit breakers V1, V2, and V3, and a transition resistor R. The timing sequence of switching from the N tap side to the N+1 tap side and from the N+1 tap side to the N tap side in this invention's switching circuit is symmetrical, greatly simplifying the mechanical design. The use of symmetrical timing and a single transition resistor design saves on switch manufacturing costs. The task of passing and interrupting current during the switching process is undertaken by the three vacuum circuit breakers V1, V2, and V3, sharing and balancing the switching task of the vacuum bulb.

The invention discloses a resonance type high-capacity direct-current change-over switch, a control method and a direct-current power transmission system. The switch comprises a main through-flow branch, a main on-off branch, a high-frequency resonance branch and a voltage-limiting energy consumption branch which are connected in parallel, the main through-flow branch is composed of an SF6 switch, the main on-off branch is composed of a vacuum trigger gap, the high-frequency resonance branch is composed of a resonance inductor, a resonance capacitor and a resonance excitation source which are connected in series, and the resonance excitation source is composed of a forward thyristor group, a reverse thyristor group and a pre-charging capacitor. And the states of the forward thyristor group and the reverse thyristor group are complementary. The functions of long-term through-flow, high-frequency on-off and resonance excitation are realized by different elements such as the SF6 switch, the vacuum trigger gap and the resonance excitation source, so that the rated current level and the resonance frequency are greatly improved, the capacitor consumption is reduced, the limitation of SF6 arc voltage on the conversion current level is broken, and the miniaturization design of the high-capacity direct-current conversion switch is realized.

The utility model discloses a change-over switch convenient to disassemble, and relates to the technical field of electrical equipment. The lettering device comprises a mounting panel and a lettering panel, the lettering panel is clamped in the mounting panel, a positioning cylinder is arranged at the center position in the mounting panel, self-locking buckles are oppositely arranged on the positioning cylinder, a positioning round hole is formed in the position, corresponding to the positioning cylinder, of the lettering panel, clamping lock catches are oppositely arranged on the side wall of an inner ring of the positioning round hole, and the self-locking buckles are clamped in the clamping lock catches. The position of the clamping lock catch corresponds to the position of the self-locking buckle, and after the printing panel is clamped on the mounting panel, the self-locking buckle is correspondingly clamped on the clamping lock catch. In the process of installing the lettering panel, when the self-locking buckle of the installing panel is in contact with the central circular hole structure of the lettering panel, the self-locking buckle can elastically deform inwards due to extrusion. The device is reliable in connection, convenient to mount and dismount, high in maintenance efficiency and capable of protecting the appearance of the lettering panel, and has remarkable practicability.

The utility model provides a high altitude 1000kV substation station power supply system with higher reliability relates to substation station power supply technical field. High altitude 1000kV substation station power supply system, including station transformer I, station transformer II, spare power station transformer, first busbar I section, first busbar II section and first busbar III section, the spare power station transformer is accessed from the station, and its low voltage side is connected with first busbar II section, is equipped with the tie -in circuit breaker between first busbar II section and first busbar I section and between first busbar II section and first busbar III section respectively, is equipped with the access line I and access line II of parallel setting on the working section busbar III section, is equipped with station transformer VI on the access line I, is equipped with station transformer VII on the access line II, the access line I is connected with first busbar I section, the access line II is connected with first busbar III section, and double power automatic transfer switch is equipped between the access line II and access line I.

The utility model relates to a change-over switch, which comprises a base, a contact system, a driving mechanism and a cover plate arranged on the base, the cover plate covers the contact system and the driving mechanism, and the driving mechanism comprises a motor, a screw rod in linkage fit with the motor and a nut arranged on the screw rod. The contact system comprises a static contact seat arranged in the base, a plurality of static contacts respectively arranged on the static contact seat, a movable contact frame which is arranged in the base in a sliding manner and is in linkage fit with the nut, and a plurality of movable contacts which are arranged on the movable contact frame in a linkage manner and are matched with the plurality of static contacts; the moving contact comprises two moving contact pieces arranged in contact holes of the moving contact frame, a base plate arranged between the two moving contact pieces and two elastic pieces arranged between the two moving contact pieces and the moving contact frame respectively, and a contact clamping space matched with the static contact is formed between the two ends of the two moving contact pieces. The utility model has the advantages of simple structure, stable and reliable performance, good protection performance and long service life.

The utility model belongs to the field of static change-over switches, and provides a static change-over switch, which comprises a machine body provided with an external power supply connecting end, a load connecting end and a standby power supply connecting end, and the standby power supply connecting end is electrically connected with the load connecting end; and the mainboard and relay integration is arranged in the machine body and is electrically connected with the mainboard, the external power supply connecting end, the load connecting end and the standby power supply connecting end. Compared with the prior art, the static change-over switch has the advantages that the relay is integrally arranged in the machine body and matched with the main board, the relay is adopted as a turn-off element of the static change-over switch, the turn-off time can be shortened to about 10ms, the defect that a thyristor does not conform to safety regulations is overcome, and the defects that a contactor is low in turn-off speed and high in cost are overcome. According to the technical scheme, the static change-over switch is economical and low in manufacturing cost, the stability and reliability of the whole system are guaranteed, and rapid switching of the static change-over switch between the grid-connected mode and the off-grid mode can be achieved.

The utility model belongs to the field of dual power automatic transfer switch, concretely relates to an automatic conversion device of dual power automatic transfer switch, including casing and conversion mechanism and hand automatic switching mechanism and control circuit board, hand automatic switching mechanism includes slide plate seat and slide plate and push plate and micro -switch and elastic reset piece, push plate relative casing slide and have electric position, manual position, micro -switch sets up on control circuit board and is matched with push plate, push plate slides to electric position, push plate makes micro -switch and connects control circuit board's power, push plate's driving force makes slide plate compression elastic reset piece and closes casing's operation hole, push plate slides to manual position, push plate makes micro -switch and cuts off control circuit board's power, slide plate loses push plate's driving force, and the elasticity of elastic reset piece makes slide plate open casing's operation hole, this hand automatic switching mechanism adopts slide plate structure design, and the structure design is simple, can avoid slide plate and get stuck phenomenon, and hand automatic switching reliability is high.

A static transfer switch includes first and second inputs, an output, first and second bypass breakers, first and second power stages, first and second contactors, a load switch, and a controller. The first and second inputs are configured to selectively couple with a first power source via a first circuit breaker and a second power source via a second circuit breaker, respectively. The first and second bypass breakers are configured to selectively couple the first and second input with the output, respectively. The first and second contactors are configured to selectively couple the first input with the first power stage and the second input with the second power stage, respectively. The load switch is configured to selectively couple the first and second power stages with the output, and the controller is configured to modify an operating state of the first and second contactors and the first and second power stages.

The utility model provides a transfer trolley obstacle avoidance device and a transfer trolley. The transfer trolley obstacle avoidance device comprises a change-over switch unit, a start button, a PLC control unit, a driving motor, an image sensor and a parking limiting unit. Wherein the change-over switch unit, the start button, the driving motor, the image sensor and the parking limiting unit are all in communication connection with the PLC control unit; the change-over switch unit selects a parking position, a start button is pressed down, and the PLC control unit is triggered to control the driving motor to drive the transfer trolley to run to the parking position; in the running process of the transfer trolley, after the image sensor senses an obstacle, the PLC control unit is triggered to control the driving motor to stop; after the obstacle disappears, the PLC control unit is triggered to control the driving motor to drive the transfer trolley to run to the parking position; and after the parking limiting unit senses that the transfer trolley arrives at the parking position, the PLC control unit is triggered to control the driving motor to stop. The labor cost is reduced, and the potential safety hazard is reduced.

The invention provides a contact mechanism and a change-over switch, and relates to the low-voltage electrical field. The contact mechanism comprises a first static contact, a second static contact, a moving contact assembly, a driving assembly and an elastic energy storage piece, one end of the elastic energy storage piece is connected with the moving contact assembly, and the other end of the elastic energy storage piece is rotationally connected with a shell of a change-over switch; the driving assembly can drive the elastic energy storage part to rotate and store energy, and when the elastic energy storage part rotates to a preset point, the elastic energy storage part can release energy and drive the moving contact assembly to rotate, so that the moving contact assembly is switched on with the first static contact or the second static contact. According to the contact mechanism, rapid opening and closing between the moving contact and the static contact can be realized through the energy storage and release processes of the elastic energy storage member, and the speed and reliability of the circuit conversion process are improved.

The application provides a relay protection secondary circuit plunger voltage measurement training device, which comprises a portable training device body and a control circuit arranged in the training device body; the control circuit comprises a tripping circuit for simulating a tripping state and a closing circuit for simulating a closing state; in the simulation circuit, an intermediate relay is connected in series with an auxiliary contact of a reset button, two micro switches are connected in series at the upper and lower ends of the plunger respectively; the reset button and the micro switch connected in series at the upper end of the plunger are connected with one end of a change-over switch, the other end of the change-over switch is connected with a negative pole of a power supply through an intermediate relay coil, the intermediate relay and the micro switch connected in series at the lower end of the plunger are connected with a positive pole of the power supply. The application can realize portable training, and can help operation personnel to clearly master the plunger potential of the protection device of the circuit breaker under different conditions, and help to prevent the plunger misoperation and omission from the source.

The utility model relates to a TTL and RS232 intelligent automatic switching circuit comprising a change-over switch, a first movable contact of which is used for connecting a sending pin of a communication interface, a second movable contact of which is used for connecting a receiving pin of the communication interface, and a first static contact and a second static contact of which are respectively connected to a receiving end and a sending end of a TTL signal transmit-receive circuit, the third static contact and the fourth static contact are respectively connected to the receiving end and the transmitting end of the RS232 signal transceiving circuit; the control switch is connected in series between the coil of the change-over switch and the voltage source, and the controlled end of the control switch is connected to the output end of the signal acquisition circuit for controlling the action of the change-over switch; and the input end of the signal acquisition circuit is used for being connected with a sending pin of the communication interface and is used for continuously outputting a high-level signal to the controlled end of the control switch when receiving a level signal smaller than a preset voltage so as to control the control switch to be in a turn-off state. The circuit provided by the utility model can avoid the problem that the plug of the communication interface is plugged in a wrong position in the production link of electronic equipment.

This invention relates to a turnout snow melting conversion system, characterized by comprising: a mode conversion switch (1), a CPU2, an automatic control module (3), a manual control module (4), a peak-shaving start unit (5), a relay start unit (6), a power supply module (7), a display module (8), a communication module (9), an input interface unit (10), and an output interface (11). When the mode conversion switch is in automatic mode, the MAS first receives an enable signal to prevent misoperation, and simultaneously sends an automatic control signal to the automatic control module. At this time, the automatic control module opens the AND gate, and when the input interface unit receives the heating start control information, it directly transmits it to the relay start unit. The relay start unit then starts the AC contactor during peak-shaving to initiate heating. This turnout snow melting conversion system is easy to operate, aesthetically pleasing, and can realize manual control, automatic control, peak-shaving start, fault alarm, command judgment, and auxiliary cabinet cascading for snow melting control.

The utility model belongs to hydraulic control module test technical field discloses a module EOL test end before prompting equipment, including pneumatic -electric conversion switch, audible -visual early warning lamp and mounting support, pneumatic -electric conversion switch is connected through screw thread interface series access EOL valve island gas source input end pipeline, and the normally closed contact end of pneumatic -electric conversion switch is connected 24V power supply with audible -visual early warning lamp through wire, the trigger pressure threshold value of pneumatic -electric conversion switch is 0.4 0.6MPa, pneumatic -electric conversion switch is installed on mounting support, and the mounting position of mounting support is located in the valve island output pipeline end, and pneumatic -electric conversion switch is installed on the quick plug connector, and pneumatic -electric conversion switch is connected with gas source pipeline through quick plug connector, and the quick plug connector is embedded with O type sealing washer, and O type sealing washer adopts fluorine rubber material. The utility model through visual enhancement urgency, promote task efficient propulsion, by this promote standardization process execution, reduce artificial oversight standby time, effectively reduce production operation cost.

The embodiment of the invention provides a mining DC power distribution system. In one specific embodiment, the system comprises a rectification filtering unit, an energy storage assembly, a first power-off change-over switch, a second power-off change-over switch, relay power generation equipment and a controller. The controller is used for acquiring a first conversion state of the first power-off automatic conversion switch, responding to the first conversion state as an instruction that the output end of the first power-off automatic conversion switch is connected with the standby input end, controlling the power generation equipment to be started, acquiring an operation state of the power generation equipment, responding to the operation state as an operation ready instruction, and controlling the power generation equipment to be started. And the coil of the relay is controlled to be electrified. The mining DC power distribution system can stably and continuously supply power for a long time.

The invention relates to a device for limiting short-circuit currents in a load tap changer, in particular in a load transfer switch of a load tap changer, comprising a first sensor for measuring a current in a first current line of the load tap changer, an interrupting element, a control device and a current limiting element, wherein the interrupting element is arranged in the first current line of the load tap changer, the current limiting element is arranged in parallel to the interrupting element, the first sensor is configured to transmit a first measurement signal M1 representing the measured current in the first current line of the load tap changer to the control device, the interrupting element can be actuated by the control device such that the interrupting element can interrupt the current guidance in the first current line of the load tap changer, thereby diverting the guided current onto the current limiting element.

A hybrid cementing apparatus includes a mixing tub; a genset; variable frequency drives electrically coupled to the genset; a transfer switch electrically coupled to the variable frequency drives; electric motors electrically coupled to the variable frequency drives; and pumps mechanically coupled to the electric motors. At least one of the pumps is configured to pump cement out of the mixing tub.

The utility model relates to the technical field of change-over switch mounting seats, and discloses a mounting seat for an automatic change-over switch, which comprises a mounting plate, the upper surface of the mounting plate is fixedly connected with a box body, the upper surface of the box body is provided with a switch main body, and the left side and the right side of the switch main body are fixedly connected with mounting brackets; mounting holes are formed in the mounting supports, round holes are formed in the upper surface of the box body, cylinders are fixedly connected to the inner walls of the round holes, the surfaces of the cylinders make contact with the inner walls of the mounting holes, U-shaped plates are fixedly connected to the left side and the right side of the inner wall of each cylinder, and sliding holes are formed in the left side and the right side of each cylinder. According to the utility model, through the cooperation of the mounting plate, the box body, the round hole, the cylinder, the U-shaped plate, the sliding hole, the locking bracket, the sliding groove and the reset bracket, a user can complete the disassembly and assembly of the switch main body on the mounting seat by pushing and pulling the sliding plate on the reset bracket, so that the mounting seat is more convenient to use.