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34results about How to "Reduce switch size" patented technology

Pre-loading device and low voltage differential signal transmitter

The invention provides a pre-emphasis device and a low-voltage differential signal transmitter. The pre-emphasis device comprises a pre-emphasis pulse signal generating unit configured to generate a pre-emphasis pulse signal according to a serial data signal received from an external source; and a pre-emphasis current output unit including a bypass unit connected with an LVDS driver in parallel and including a bypass switch configured to act in response to the pre-emphasis pulse signal for bypassing an additional current applied to the LVDS driver during action, and an additional current unit including field effect transistors forming a channel, wherein the gates of the field effect transistors are connected with an external control signal and are configured to guide the additional current to the bypass unit and the LVDS driver connected with each other in parallel in response to the control signal. The pre-emphasis device can remarkably lower the power consumption of the pre-emphasis pulse signal generation circuit.
Owner:ANALOGIX CHINA SEMICON

Phase-change switch

The invention discloses a phase-change switch which comprises three permanent magnetic contact mechanisms, three clamp plates, a clamp plate hand lock mechanism and a clamp plate mutual exclusion mechanism. A user-side single-phase live wire connector and uplink-side three-phase live wire connectors are connected with three groups of static contact pairs, and three groups of static contact pairs respectively correspond to the three permanent magnetic contact mechanisms. The permanent magnetic contact mechanisms comprise permanent magnetic mechanisms, movable contacts and guide columns. The movable contacts are mounted at the bottoms of the guide columns. The tops of the guide columns are connected with magnetic cores of the permanent magnetic mechanisms. The movable contacts can be driven to move upwardly when the permanent magnetic mechanisms upwardly suck the movable contacts, so that two ends of each movable contact can be connected with the corresponding static contact pairs. The roots of the three clamp plates are respectively mounted on clamp plate shafts, and the tail ends of the three clamp plates are respectively movably connected with the guide columns of the three permanent magnetic contact mechanisms. When one of the clamp plates upwardly swings, the other two clamp plates can be clamped by the clamp plate mutual exclusion mechanism and cannot upwardly swing. Operators can forcibly separate the three movable contacts from three static contacts via the clamp plates by the aid of the clamp plate hand lock mechanism.
Owner:南京鼎牌电器有限公司 +1

Watchdog division load switch

The invention discloses a watchdog division load switch. The watchdog division load switch is mainly composed of a breaker body, a fault detection controller and an external voltage transformer, wherein the breaker body, the fault detection controller and the external voltage transformer are electrically connected through an aviation socket and an outdoor sealing control cable. The aviation socket is fixedly installed at the bottom of the breaker body, and the breaker body comprises a casing, an upper cover, an inlet wire sleeve, an outlet wire sleeve, an insulating box installed in the casing, a vacuum arc-extinguishing chamber and an insulating operating mechanism. The insulating operating mechanism comprises an insulating pull rod, an operating spindle and a spring operating mechanism. Current transformers are respectively installed on two sides of an inlet wire conductive rod and an outlet wire conductive rod in the casing. The watchdog division load switch is simple in structure and reasonable in design, runs stably and is safe, reliable and suitable for division of a 10 kV overhead distributing line of a 10 kV system in neutral non-grounding, arc suppression coil grounding or low-resistance grounding and a user.
Owner:LIUZHOU HAIGE ELECTRICAL

Non-exciting shunting switch for positive and negative voltage regulating

The invention relates to forward-backward voltage regulation no-excitation tapping switch used for a transformer. The switch comprises an insulator, an upper bracket, a lower bracket and an insulating shaft. Two layers of fixed contacts and moving contacts are arranged corresponding to every phase of the switch, and the moving contacts are installed on the insulating shaft and connected with two adjacent fixed contacts at the same time. The tapping switch is characterized in that four fixed contacts linked with a tap k of a main coil and three fixed contacts linked with a tap of a voltage regulation coil are arranged on one layer in every phase; three fixed contacts for outputting x and four fixed contacts linked with the tap of the voltage regulation coil are arranged on the other layer in every phase; and the arrangement directions of the tap linkage positions of the fixed contacts which are connected with the tap of the voltage regulation coil and arranged on the opposite layers in every phase are opposite. The switch has the advantages of simple structure, convenient manufacturing, reliable working performance, low manufacturing and use costs, suitability for configuring with transformers with various structures, convenience for the simplification of a transformer structure, and good forward-backward voltage regulation effect, thereby meeting the market demands.
Owner:秦靓

Dry-type transformer on-load capacity regulating switch and transformer

The invention provides a dry-type transformer on-load capacity regulating switch and a transformer, relates to the technical field of transformers, and aims at solving the technical problems that an existing capacity regulating switch is complex in transmission structure, and conversion is not in place easily and even fails. The dry-type transformer on-load capacity regulating switch comprises a high-voltage side switch, a low-voltage side switch, a moving plate and a driving mechanism, and the moving plate is connected to the driving mechanism; the high-voltage side switch comprises a solid-sealed polar pole in which a high-voltage vacuum bubble is arranged and a transmission piece; the upper end of the transmission piece is hinged with the lower end of the insulating pull rod of the solid-sealed polar pole; the low-voltage side switch comprises a moving contact and a static contact; and the moving contact is connected to the moving plate. The transformer is provided with the dry-typetransformer on-load capacity regulating switch. A permanent magnet operating mechanism is adopted, the transmission structure is simple, mechanical clamping stagnation and abrasion are not likely tohappen, and failure is avoided. Only the vacuum bubble is adopted on the high-voltage side, the air switch is adopted on the low-voltage side, the size of the capacity regulating switch is reduced, and cost is saved.
Owner:北京博瑞莱智能科技周口有限公司

Line switch control system, method and device

The invention provides a line switch control system, method and device. The control system comprises monitoring equipment, a master control chip, a drive chip and a controller, wherein the monitoringequipment is used for collecting line information of a controlled circuit; the master control chip is connected with the monitoring equipment and is used for receiving the line information, collectedby the monitoring equipment, of the controlled circuit and generating a control signal according to the line information; the drive chip is connected with the master control chip and is used for the control and carrying out drive control on the controller according to the control signal; and the controller is connected with the drive chip and is used for carrying out switch control on the controlled circuit under the drive control of the drive chip. Through the line switch control system, method and device, the technical problems that an existing mechanical DC switch is short in life, overlarge in volume and relatively high in cost are solved, and the technical effects of effectively reducing the volume of the switch and reducing the cost are achieved.
Owner:GREE ELECTRIC APPLIANCES INC

Light-operated semiconductor switch

The invention discloses a light-operated semiconductor switch. A shielding ground electrode, a chip semiconductor laser, a laser beam splitting coupler, a large-area semiconductor unit and a shieldinghigh-voltage electrode are sequentially arranged in the light-operated semiconductor switch from top to bottom. An electricity taking module or a boosting module is connected in a gap between the chip semiconductor laser and the laser beam splitting coupler; the side face of the light-operated semiconductor switch is wrapped with an insulating packaging shell, and the insulating packaging shell and the shielding electrode jointly form a light-operated semiconductor switch packaging shell. A power supply and trigger signal interface of the light-operated semiconductor switch extends out of thelight-operated semiconductor switch packaging shell. According to the invention, the light-operated semiconductor switch can be used for various occasions such as a high-power pulse power supply, a compact high-power pulse assembly, small-size high-energy pulse triggering and the like, and has the advantages of high power capacity, high reliability, long service life, small size and the like.
Owner:INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS

Pressing type travel switch resisting severe environment

ActiveCN105206438AEven contactAvoid the problem of poor environmental resistance of the switchContact operating partsEngineeringBlind hole
The invention discloses a pressing type travel switch resisting severe environment. The pressing type travel switch is composed of a shell, a drive body assembly, a base assembly and a pressing spring. The base assembly comprises a base body and at least one set of contact bars. The drive body assembly comprises a drive body, a button and at least one drum-like contact spring part. The number of the drum-like contact spring parts is the same as that of the sets of the contact bars. A locating boss on the base body and a locating blind hole in the drive body are located on the same axis. The upper end of the pressing spring is fixedly embedded into the locating blind hole. The lower end of the pressing spring is fixedly embedded outside the locating boss. The shell is a housing with a penetration hole formed in the center of the top. According to the travel switch, the drum-like bundling type contact springs with multiple elastic contacts are adopted, multi-point elastic surrounding uniform contact with the contact bars can be achieved, and the travel switch has the advantages of being high in impact resistance, high in vibration resistance, miniaturized, high in reliability, low in cost and the like.
Owner:G & A TECH

Seven-gear off-circuit tap-changer achieving direct-reverse voltage regulating

The invention relates to a seven-gear off-circuit tap-changer achieving direct-reverse voltage regulating. The seven-gear off-circuit tap-changer comprises an insulator, an upper support and a lower support, and an insulating shaft is arranged between the upper support and the lower support; each phase corresponding to the tap-changer is provided with two layers of fixed contacts and moving contacts, one of the two fixed contact layers in each phase is a main coil tap layer and is provided with four fixed contacts connected with a main coil tap k and seven fixed contacts connected with a voltage regulating coil tap, the other layer is a voltage regulating outputting layer and is provided with four x outputting fixed contacts and seven fixed contacts connected with the voltage regulating coil tap, and the insulating shaft is provided with moving contacts each of which is simultaneously connected with two adjacent fixed contacts. The seven-gear off-circuit tap-changer is simple in structure, easy and convenient to manufacture, reliable in working performance, low in manufacturing and using cost, suitable for being configured with transformers with various structures and capable of facilitating simplification of the transformer structures, has more direct-reverse voltage regulating gears and a good direct-reverse voltage regulating effect and can meet the requirements of the transformers needing more gears to conduct direct-reverse voltage regulating.
Owner:WUHAN TAIPU TRANSFORMER CHANGER

Linked voltage regulation non-excitation tap switch

The invention relates to a linked voltage regulation non-excitation tap switch for a transformer, which comprises an insulator, an upper support, a lower support and a rotating shaft; and each phase corresponding to the switch is provided with two layers of static contacts and moving contacts bridged with two adjacent static contacts. The tap switch is characterized in that: one layer of the two layers of static contacts of each phase is provided with static contacts of an upper or a lower voltage regulation tap of a linked voltage regulation coil, the two adjacent static contacts form a tap position, the tap positions are distributed along a circumferential direction in reduced progressively sequence from large to small, and another minimum tap position is repeatedly arranged after one minimum tap position; the other layer is provided with static contacts of a lower or an upper voltage regulation tap of the linked voltage regulation coil, the tap positions are distributed along the circumferential direction in reduced progressively sequence from large to small, and another maximum tap position is repeatedly arranged before one maximum tap position; and the maximum tap position inone layer of the two layers of static contacts set in each phase corresponds to the foremost tap position of the maximum tap position arranged in the other layer. The tap switch is simple and compactin structure and reasonable in setting, achieves multi-tap voltage regulation by using less voltage regulation coil taps, can complete operation at one time, and has high reliability and convenient use.
Owner:WUHAN TAIPU TRANSFORMER CHANGER

Microfluid inertia grounding switch capable of bidirectionally identifying

ActiveCN110752110AWith inertial load identification functionReliable lockingElectric switchesMetal electrodesMaterials science
The invention discloses a microfluid inertia grounding switch capable of bidirectionally identifying. The switch comprises a substrate, a cover plate, metal liquid drops, a metal electrode and a microchannel, wherein the cover plate is arranged at an upper end of the substrate, the cover plate and the substrate are sealed, the micro channel is arranged on the substrate, the metal electrode is arranged on the cover plate, the micro channel comprises a rectangular liquid storage pool, a fan-shaped island, a diamond passage, a capillary valve, a direct-through passage and a bending passage, themetal liquid drops are arranged in the rectangular liquid storage pool, a contact at one end of the metal electrode is arranged in the micro channel, and a contact at the other end of the metal electrode is arranged outside a coincided region of the substrate and the cover plate. When an inertia force applied to the switch is larger than a threshold, the metal liquid drops can break through the capillary valve, the metal liquid drops can be completely recovered to the rectangular liquid storage pool after a backblow load and a service load are disappeared, and the switch is switched on by themetal liquid drops and the metal liquid drops cannot be recovered only under an effect of forward inertia force when a pellet rubs with ground. By the switch, an acceleration load can be bidirectionally identified, power is stably connected, and the switch has performance of working under a low-temperature environment.
Owner:NANJING UNIV OF SCI & TECH

Switch and protection circuit for exoskeleton robot

The invention relates to a switch and a protection circuit, in particular to a switch and a protection circuit for an exoskeleton robot. The circuit comprises a first switch S1, a first resistor R1, asecond resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first optocoupler U1, an NPN type first triode Q1, a first voltage stabilizing diode D1 and a P type first MOS tube M1; a seventh resistor R7, a second optical coupler U2, an eighth resistor R8, a second voltage stabilizing diode D2, a PNP type second triode Q2, a sixth resistor R6, a tenth resistor R10, a thirdvoltage stabilizing diode D3, an N type second MOS tube M2, a first capacitor C1 and a ninth resistor R9. The invention aims to solve the problem that the overcurrent of a main switch does not exceed50mA, and power-on or power-off of power can be controlled through an IO port of a control chip. Another technical problem to be solved by the invention is to provide an under-voltage turn-off circuit which can prevent an external power supply from over-discharging when the input voltage is too low.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS

High-voltage integrated 10kV pole-mounted transformer platform complete equipment

The invention relates to a high-voltage integrated 10kV pole-mounted transformer table complete device which comprises a cabinet body installed on a transformer, a wire inlet sleeve terminal used for being connected with a high-voltage wire is arranged at the top of the cabinet body, a wiring port and an auxiliary stabilizing mechanism are arranged at the bottom of the cabinet body, and the auxiliary stabilizing mechanism is used for clamping the transformer. A monitoring module for monitoring whether the transformer works or not is also arranged in the cabinet body; a sulfur hexafluoride load switch, a high-voltage lightning arrester and a high-voltage fuse are arranged in the cabinet body, the wire inlet sleeve terminal is connected with the sulfur hexafluoride load switch, the sulfur hexafluoride load switch is connected with the transformer through the high-voltage fuse, the high-voltage lightning arrester is connected to a line between the high-voltage fuse and the sulfur hexafluoride load switch, and the high-voltage fuse is connected with the high-voltage fuse. The high-voltage lightning arrester is used for lightning protection. A complete and independent high-voltage cabinet is formed, no redundant elements and cables are exposed outside, and corrosion and aging of the elements caused by severe environments such as sunshine, strong wind, heavy snow and the like are also avoided.
Owner:济南清河电气有限公司

Linked linear voltage regulation non-excitation tap switch

The invention relates to a linked linear voltage regulation non-excitation tap switch for a transformer, which is characterized in that: each phase corresponding to the switch is provided with two layers of static contacts; one layer of the two layers of static contacts of each phase is provided with static contacts of an upper voltage regulation tap of a linked voltage regulation coil and staticcontacts of a midpoint tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; the other layer is provided with static contacts of a lower voltage regulation tap of the linked voltage regulation coil and static contacts of an output tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; two adjacent static contacts form a tap position, and the tap positions are distributed along the circumferential direction in reduced progressively sequence from large to small; and only one maximum tap position in one layer of the twolayers of static contacts set in each phase corresponds to a maximum tap position in the other layer. The tap switch is simple and compact in structure and reasonable in setting, achieves multi-tap linear voltage regulation by using less voltage regulation coil taps, is convenient to operate, has no short connected tap position and high working reliability, and is small in volume to greatly simplify the transformer structure and reduce manufacturing cost and use cost.
Owner:WUHAN TAIPU TRANSFORMER CHANGER

Single-stage direct actuating low-voltage permanent magnet vacuum load switch

The invention relates to a single-stage direct actuating low-voltage permanent magnet vacuum load switch which comprises a base, a permanent magnet operating mechanism, a low-voltage vacuum arc-extinguishing chamber and a direct actuating component. The permanent magnet operating mechanism is connected to the base. The low-voltage vacuum arc-extinguishing chamber is connected with the base and the permanent magnet operating mechanism through the direct actuating component. The single-stage direct actuating low-voltage permanent magnet vacuum load switch has the advantages that the switch is elongated in overall structure, miniaturization of low-voltage switches is realized, transmission components are simple, reliable and smaller in size, and the switch is suitable for integrated design of equipment in narrow space and complete equipment, especially suitable for being used as a low-voltage load control switch inside a transformer.
Owner:北京博瑞莱智能科技集团有限公司

Tappet rod for operating switch element

The invention relates to a tappet for actuating a switching element, especially for using in a position switch or a safety switch, said tappet comprising at least one abutment for pre-tensioning by means of at least one elastic element. Until now, the insertion of such a tappet inside a switch had lead to spatial requirements inside the switch. The inventive tappet comprises an inner region for at least partially receiving the elastic element, freeing the space around the tappet for other components. Furthermore, the invention also provides a simpler assembly and a way of advantageously protecting the elastic element.
Owner:SIEMENS AG

Switching device and feedback resistor circuit

The invention relates to a switch device and a feedback resistance circuit. The device comprises: the first transmission terminal of the first transistor is used to connect the input terminal of the operational amplifier; the second transmission terminal of the first transistor is used to connect the output terminal of the operational amplifier through a feedback resistor; the control terminal of the first transistor is used to connect The first gating control circuit is used to respond to the first gating control signal output by the first gating control circuit to enter the gating state or the off state; the output terminal of the substrate voltage selection module is connected to the first transistor of the first transistor Three transmission terminals, one input terminal of the substrate voltage selection module is used to connect the input terminal of the operational amplifier, the control terminal of the substrate voltage selection module is used to connect the first gating control circuit; the substrate voltage selection module is used to connect the first gating control circuit; With the transistor in the gated state, the substrate of the first transistor transmits the input voltage of the operational amplifier. The device can improve the bandwidth of the programmable gain amplifier.
Owner:广州瀚辰信息科技有限公司

Full-reset switch structure

The invention discloses a full reset switch structure, comprising an operation panel (1), a functional part (2) for realizing electrical connection of electrical equipment, a converter (3) for controlling the action of the functional part (2), and a balance device (4), the balancer (4) is installed between the operation panel (1) and the function part (2), the converter (3) is installed in the middle of the back of the operation panel (1), and the converter ( 3) It is connected with the functional part (2) through the reset member (5). In the present invention, the converter is installed on the back of the operation panel, which effectively reduces the volume of the switch, and at the same time separates the functional parts, which is equivalent to increasing the usable space of the functional parts, which is convenient for those skilled in the art to optimize the design of the functional parts. The invention creates an internal structure It is simpler, reduces the number of required components, shortens the product assembly process, and improves the production efficiency of the manufacturer.
Owner:广东金联宇电气科技有限公司

Switching device and feedback resistance circuit

The invention relates to a switching device and a feedback resistance circuit. The device is characterized in that a first transmission end of a first transistor is used for connecting an input end of an operational amplifier; the second transmission end of the first transistor is connected with the output end of the operational amplifier through a feedback resistor; the control end of the first transistor is used for being connected with a first gate control circuit, responding to a first gate control signal output by the first gate control circuit and entering a gate state or a turn-off state; the output end of the substrate voltage selection module is connected with the third transmission end of the first transistor, one input end of the substrate voltage selection module is used for being connected with the input end of the operational amplifier, and the control end of the substrate voltage selection module is used for being connected with the first gating control circuit; and the substrate voltage selection module is used for transmitting the input voltage of the operational amplifier to the substrate of the first transistor under the condition that the first transistor is in the gating state. By adopting the device, the bandwidth of the programmable gain amplifier can be improved.
Owner:广州瀚辰信息科技有限公司

Intelligent circuit breaker with phase selection function

The invention discloses an intelligent circuit breaker with the phase selection function, which comprises a shell and a phase selection device in the shell, wherein the phase selection device comprises bistable permanent magnet mechanisms and a yoke plate mechanism, the bistable permanent magnet mechanisms are three groups of electromagnetic mechanisms, and each transmission rod is simultaneouslyengaged to or disengaged from the yoke plate mechanism to realize the simultaneous advancing and retreating opening / closing or single-phase advancing and retreating opening / closing of a three-phase circuit. By adopting the novel bistable permanent magnet mechanisms and the yoke plate mechanism, the intelligent circuit breaker not only has synchronous on and off capability but also has split-phaseselection on and off capability, and can be used as a reclosing device by equipping a reclosing controller; and the intelligent circuit breaker can also be used as an opening switch by equipping an intelligent controller. Meanwhile, the mechanisms are loaded into an SF6 air tank shell to avoid pollution and rusting by the external environment; and the switch shell is subjected to frosting and solid insulation heat isolating treatment so as to increase the insulating property and reduce the size of the switch, and the internal and external connection part of the switch is subjected to double-layer sealing treatment, thus the service life of the switch can be prolonged to more than 30,000 times, and the switch is applicable to frequent operation.
Owner:厦门智能达电控有限公司

A load isolating switch

ActiveCN103560037BSolve the closed bouncing problemImproved short-time withstand current capabilityHigh-tension/heavy-dress switchesAir-break switchesPower flowCoupling
The invention discloses a load disconnecting switch. The load disconnecting switch comprises an insulating frame and an operating mechanism fixed on the frame, a contact system and an arc extinguish chamber, and magnetic blow-out coils are arranged at the two ends of the arc extinguish chamber. The contact system comprises a static contact base, a static arc contact and a static main contact, the static arc contact and the static main contact are fixed on the static contact base, a shaft is arranged at the bottom of the static contact base, a dynamic contact is installed on the shaft, a dynamic arc contact, a dynamic main contact and a spring are fixed on the dynamic contact, the static arc contact is arranged between the magnetic blow-out coils and the dynamic arc contact, the static arc contact is connected with a static arc strike angle, the magnetic blow-out coils are connected with the static arc strike angle and the static contact base, the dynamic contact is connected with a flexible coupling through the dynamic contact base, and the operating mechanism is connected with the dynamic contact through a pushing rod. The load disconnecting switch has the advantages that a fault large current is conducted, a rated load current is disconnected, the load disconnecting switch can bear a large current within a short time, the structure is compact, working is safe and reliable, and the load disconnecting switch is suitable for an urban railway system direct current traction power supply system and serves as a longitudinal load operating power-driven disconnecting switch.
Owner:武汉长海电气科技开发有限公司

Linked linear voltage regulation non-excitation tap switch

The invention relates to a linked linear voltage regulation non-excitation tap switch for a transformer, which is characterized in that: each phase corresponding to the switch is provided with two layers of static contacts; one layer of the two layers of static contacts of each phase is provided with static contacts of an upper voltage regulation tap of a linked voltage regulation coil and static contacts of a midpoint tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; the other layer is provided with static contacts of a lower voltage regulation tap of the linked voltage regulation coil and static contacts of an output tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; two adjacent static contacts form a tap position, and the tap positions are distributed along the circumferential direction in reduced progressively sequence from large to small; and only one maximum tap position in one layer of the two layers of static contacts set in each phase corresponds to a maximum tap position in the other layer. The tap switch is simple and compact in structure and reasonable in setting, achieves multi-tap linear voltage regulation by using less voltage regulation coil taps, is convenient to operate, has no short connected tap position and high working reliability, and is small in volume to greatly simplify the transformer structure and reduce manufacturing cost and use cost.
Owner:WUHAN TAIPU TRANSFORMER CHANGER

A positive and negative voltage regulating seven-speed non-excitation tap-changer

The invention relates to a seven-gear off-circuit tap-changer achieving direct-reverse voltage regulating. The seven-gear off-circuit tap-changer comprises an insulator, an upper support and a lower support, and an insulating shaft is arranged between the upper support and the lower support; each phase corresponding to the tap-changer is provided with two layers of fixed contacts and moving contacts, one of the two fixed contact layers in each phase is a main coil tap layer and is provided with four fixed contacts connected with a main coil tap k and seven fixed contacts connected with a voltage regulating coil tap, the other layer is a voltage regulating outputting layer and is provided with four x outputting fixed contacts and seven fixed contacts connected with the voltage regulating coil tap, and the insulating shaft is provided with moving contacts each of which is simultaneously connected with two adjacent fixed contacts. The seven-gear off-circuit tap-changer is simple in structure, easy and convenient to manufacture, reliable in working performance, low in manufacturing and using cost, suitable for being configured with transformers with various structures and capable of facilitating simplification of the transformer structures, has more direct-reverse voltage regulating gears and a good direct-reverse voltage regulating effect and can meet the requirements of the transformers needing more gears to conduct direct-reverse voltage regulating.
Owner:WUHAN TAIPU TRANSFORMER CHANGER
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