Abstract

Disclosed are a passive triggered-power electronic tap-changer device and a contact device. The power electronic tap-changer device comprises: two taps, a main contact, two auxiliary contacts, two trigger contacts, an output terminal, two thyristors, and four voltage divider resistors, which can achieve the passive triggering of a power electronic switch by means of controlling the auxiliary contacts and the trigger contacts. Provided in the present invention is a contact device for the passive triggered-power electronic tap-changer, comprising: at least two stationary contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts, and a drive shaft, wherein the main contact, the thyristor trigger contacts, and the thyristor auxiliary contacts are fixed to the drive shaft, the contact device can switch the power electronic switch to different stationary contacts by means of controlling the rotation of the drive shaft, and maintains the switching time sequence of passive triggering.

IPC Classes  ?

• H01H 9/00 - Details of switching devices, not covered by groups
• H01H 19/12 - Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing

Abstract

Disclosed are a passive triggered-power electronic tap-changer device and a contact device. The power electronic tap-changer device comprises: two taps, a main contact, two auxiliary contacts, two trigger contacts, an output terminal, two thyristors, and four voltage divider resistors, which can achieve the passive triggering of a power electronic switch by means of controlling the auxiliary contacts and the trigger contacts, thereby improving the circuit reliability and reducing costs. Provided in the present invention is a contact device for the passive triggered-power electronic tap-changer, comprising: at least two stationary contacts, a main contact, two thyristor trigger contacts, two thyristor auxiliary contacts, and a drive shaft, wherein the main contact, the thyristor trigger contacts, and the thyristor auxiliary contacts are fixed to the drive shaft, the contact device can switch the power electronic switch to different stationary contacts by means of controlling the rotation of the drive shaft, and maintains the switching time sequence of passive triggering. The switching process is simple to control and has high stability, and the device costs are low.

IPC Classes  ?

• H01H 9/00 - Details of switching devices, not covered by groups
• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 19/08 - BasesStationary contacts mounted thereon
• H01H 19/10 - Movable partsContacts mounted thereon

Goods & Services

Transformers; switches, electric; circuit breakers; distribution consoles (electricity); control panels (electricity); electricity switchboard, high/low voltage; electric installations for the remote control of industrial operations; electric apparatus for the remote control of industrial operations; electric apparatus for commutation; automation system for power plants.

Goods & Services

Transformers; switches, electric; circuit breakers; distribution consoles (electricity); control panels (electricity); electricity switchboard, high/low voltage; electric installations for the remote control of industrial operations; electric apparatus for the remote control of industrial operations; electric apparatus for commutation; automation system for power plants.

Goods & Services

Transformers; switches, electric; circuit breakers; electricity distribution consoles; electric control panels; electricity switchboard, high/low voltage; electric installations for the remote control of industrial operations; electric apparatus for the remote control of industrial operations; electric apparatus for commutation in the nature of rectifiers and commutators; automation system for power plants, namely, testing, measuring, controlling and protecting equipment, used for the performance and efficiency of power plant equipment

Goods & Services

Transformers; switches, electric; circuit breakers; electricity distribution consoles; electric control panels; electricity switchboard, high/low voltage; electric installations for the remote control of industrial operations; electric apparatus for the remote control of industrial operations; electric apparatus for commutation in the nature of rectifiers and commutators; automation system for power plants, namely, testing, measuring, controlling and protecting equipment, used for the performance and efficiency of power plant equipment

Abstract

Disclosed is a suspensible external combined on-load tap changer, including: a switch box, a switch body and a motor mechanism, a top box wall of the switch box being opened with a top opening, a top box cover being mounted on the top opening, wherein the switch body is detachably mounted in the switch box and is entirely lifted in and lifted out by the top opening; and the motor mechanism is connected with the switch body in a driving manner. The switch body in the present invention uses a hoisting structure, and the top box wall of the switch box is opened with a top opening with a size large enough, so that the switch body is directly lifted in and lifted out of the switch box from the top opening, and installation and maintenance are easier.

IPC Classes  ?

• H01H 9/02 - Bases, casings, or covers
• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 9/00 - Details of switching devices, not covered by groups

Abstract

A changeover selector with a vacuum arc-extinguishing circuit comprises: a central shaft (601); a moving contact (603) driven by the central shaft to rotate; and a first fixed contact (604) and a second fixed contact (605) which are circumferentially arranged on an insulating lath of a cage body of the changeover selector. The moving contact is rotated under the drive of the central shaft and then switched between the first fixed contact and the second fixed contact, and the moving contact and the first fixed contact and the second fixed contact compose a main circuit for changeover selection. A vacuum arc-extinguishing branch containing a vacuum tube (607) is connected to the main circuit for changeover selection in parallel, and the vacuum tube is opened after the moving contact is separated from the first fixed contact and is closed before the moving contact is electrically connected to the second fixed contact. The changeover selector with a vacuum arc-extinguishing circuit has the advantages of a simplified mechanism and reliable control, solves the problem of pollution of transformer oil due to the fact that the changeover selector generates an electric arc; and the structure size is small, thereby being able to reduce the occupied space of the changeover selector, save the space of a transformer box body, and reduce the costs of transformers and transformer oil.

IPC Classes  ?

• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 1/56 - Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
• H01H 9/30 - Means for extinguishing or preventing arc between current-carrying parts
• H01H 33/664 - ContactsArc-extinguishing means, e.g. arcing rings

Abstract

Disclosed is a change-over selector with a vacuum arc extinguishing circuit, including a central shaft, a moving contact driven by the central shaft to rotate, and a first static contact and a second static contact circularly arranged on insulation laths of a cage body of the change-over selector, where the moving contact is driven by the central shaft to rotate to switch between the first static contact and the second static contact, the moving contact and the first and second static contacts form a change-over selection main-circuit, a vacuum arc extinguishing sub-circuit including a vacuum tube is connected in parallel to the change-over selection main-circuit, the vacuum tube is opened after the moving contact is separated from the first static contact, and the vacuum tube is closed before the moving contact is electrically connected to the second static contact.

IPC Classes  ?

• H01H 33/666 - Operating arrangements
• H01H 9/00 - Details of switching devices, not covered by groups

Abstract

A change-over structure disposed between a moving contact and a static contact of a tap selector includes an insulation changer base plate, static contacts which are fixed on the insulation changer base plate in at least one column at intervals, the inner ends of the static contacts are electrically connected to respective tap windings of a transformer, rotation shafts, each comprising moving contacts that are evenly distributed on each of the rotation shafts and are electrically connected to each other, and arc-shaped conductors corresponding to the static contacts in at least one column. Each of the arc-shaped conductors and outer ends of the static contacts are disposed at the same circumference with a center of one of the rotation shafts as a circle center. When one of the moving contacts is changed over between the two static contacts, another moving contact is electrically connected to the arc-shaped conductor.

IPC Classes  ?

• H01H 67/14 - Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
• H01H 9/00 - Details of switching devices, not covered by groups
• H01H 1/06 - Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Abstract

A switching structure of moving contacts and fixed contacts of a tap selector comprises an insulating switch base plate, at least two fixed contacts (101, 102, 103; 401.1, 401.2, …, 401.9), at least one rotary shaft (300; 405), and at least one arc-shaped conductor (200; 404.1, 404.2, 404.3). The at least two fixed contacts are fixed on the insulating switch base plate in at least one row and at intervals, and the inner end of each of the at least two fixed contacts is in electric connection with a tapping winding corresponding to a transformer. At least two moving contacts (310, 320, 330; 403.1, 403.2, 403.3) are evenly arranged on the rotary shaft, and the two moving contacts are in electric connection. The at least one arc-shaped conductor corresponds to the at least two fixed contacts which are arranged in at least one row. The arc-shaped conductor and the outer end (101a, 102a, 103a) of each of the at least two fixed contacts in at least one row are located at the same circumference with the center of the rotary shaft as the center of the circle of the circumference, and when one of the moving contacts is switched between the two fixed contacts, the other moving contact must be in electric connection with the arc-shaped conductor. According to the switching structure, connecting conductors inside a switch are eliminated, all parts are fixed reliably, installation is convenient, and hidden faults are reduced.

IPC Classes  ?

• H01H 1/56 - Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 9/00 - Details of switching devices, not covered by groups

Abstract

A movable contact of a tap changer comprises a mounting plate assembly (200) of the movable contact revolving with a main shaft of the changer and a clip-on movable contact (300) provided on the mounting plate assembly (200) of the movable contact. The clip-on movable contact (300) is divided into upper and lower groups of movable contact parts which are interconnected and are in clamping status. Each group of movable contact part includes a movable contact assembly (320) and a plate spring assembly (330) provided on the movable contact assembly (320). Each group of the movable contact assembly (320) is composed of multiple single movable contacts (321) in parallel. The both ends of each single movable contact have a contact respectively.

IPC Classes  ?

• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 19/12 - Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing

Abstract

An external-hanging type combined on-load tap-changer comprises a housing(200), a tap-chooser(600), a change-over switch assembly(700), a transmission means and an electric operating mechanism. Terminals(220) are provided at a sidewall of the housing(200) and are connected to coil taps of the transformer. A flange(210) is provided outside sidewall and is connected to a flange of the transformer. The tap-chooser(600) and the change-over switch assembly(700) are arranged in the housing(200) in parallel. The electric operating mechanism is connected to the transmission means. Tap action and switching action are accomplished by the transmissionmeans driving the tap-chooser(600) and the change-over switch assembly(700). Because the tap-chooser(600) and the change-over switch assembly(700) are arranged in parallel, the lateral distance is increased between each phase, the design requirement of the high-voltage and high-current switch is satisfied and the tap-changer is adapted to Δ connection of the transformer.

IPC Classes  ?

• H01F 29/04 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
• H01H 3/32 - Driving mechanisms, i.e. for transmitting driving force to the contacts

Abstract

A moving contact head for tap switches comprises a moving contact head installation plate component (200) rotating with a switch main shaft (100), and a holder-type moving contact head (300) arranged on the moving contact head installation plate component (200). The holder-type moving contact head (300) is divided into two sets of upper and lower moving contact head components, which are connected to each other and formed a holder shape; wherein, each moving contact head component comprises a moving contact head unit (320) consisting of a plurality of single moving contact heads (321) in parallel, and a leaf spring component (330) arranged on the moving contact head component (320); both ends of each single moving contact head (321) are provided with a contact point, respectively. A contacting ring (500) is clamped at one ends of the two moving contact head units (320), and a static contact head (600) is clamped the other ends of the two moving contact head units to deform a leaf spring (331) in the leaf spring component (330). However, the reaction force by the leaf spring (331) causes the moving contact head unit (320) to contact with the contacting ring (500) and the static contact head (600) to achieve on-state of large current.

IPC Classes  ?

• H01H 1/10 - Laminated contacts with divided contact surface

Abstract

The invention relates to an external hanging combined vacuum on-load tap switch, comprising a case, a tap selector, a switching means assembly, a transmission device, and one electric operation mechanism, wherein one lateral side wall of the case is provided with a connecting terminal connected with the coil tap of a transformer; the external side of the wall is provided with a first flange plate and is connected with a second flange plate of the transformer; the tap selector and the switching means assembly are arranged inside the case in parallel; and the electric operation mechanism is connected with the transmission device and drives the tap selector and the switching means assembly to achieve tapping and switching through the transmission device.

IPC Classes  ?

• H01H 25/00 - Switches with compound movement of handle or other operating part

Goods & Services

(1) Transformers; electric switches; circuit breakers; distribution consoles (electricity); control panels (electricity); high/low voltage switch panels; electric installations for the remote control of industrial operations; remote control units for industrial operations; electric apparatus for commutation namely, commutation sensors, signal devices, electric sensors, devices for reversing the direction of an electrical current, electric switches; automatic equipments for power station including, high voltage transformers, power transformers, vacuum cleaners, generators, electronic control systems for use in operating power stations to check electricity and energy consumption, gas insulated switchgear namely, a combination of electrical disconnects and circuit breakers meant to isolate equipment in and near an electrical substation.