Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/0005—Tap change devices
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/0005—Tap change devices
  • H01H9/0044—Casings; Mountings; Disposition in transformer housing
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
  • H01H3/44—Driving mechanisms, i.e. for transmitting driving force to the contacts using Geneva movement
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/0005—Tap change devices
  • H01H9/0027—Operating mechanisms
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
  • H01H33/6661—Combination with other type of switch, e.g. for load break switches
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/0005—Tap change devices
  • H01H9/0016—Contact arrangements for tap changers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/0005—Tap change devices
  • H01H9/0038—Tap change devices making use of vacuum switches

Definitions

• the invention relates to a switching module and a diverter switch with a switching module.
• On-load tap changers are known from the prior art and usually have a diverter switch and a selector.
• the diverter switch with the vacuum interrupters and the transition resistors is arranged in a cylindrical vessel.
• the selector is made up of a large number of sticks arranged in a circle. Contacts are arranged on different levels on these bars, which serve as connections for a control winding. Inside the selector, two selector arms are attached to a switching column. These make contact with the contacts on the rods. Diverter switch and selector are connected to each other via a gear.
• the diverter switch is usually constructed in such a way that the vacuum interrupters are arranged in a circular and horizontally aligned manner in a first plane. In the middle, between the vacuum interrupters, there is a cam contour that actuates the vacuum interrupters when it rotates. Further switching contacts of the diverter switch are located on a second level below the vacuum interrupters. Vacuum interrupters and switching contacts are arranged relatively far from each other and do not form a constructive unit. The wiring is done using long cables, sliding contacts and rails.
• the object of the invention is therefore to create a switching module for on-load tap changers that is simple and compact in design while still ensuring safe operation.
• Another object of the invention is to provide an on-load tap changer with a switching module that is simple and compact.
• the invention proposes a switching module for on-load tap changers, comprising: a plate having a first side and a second side opposite the first side, a vacuum interrupter, a bridge switch, wherein: the vacuum interrupter is arranged on the first side and the bridge switch is arranged immediately behind the vacuum interrupter on the second side.
• This particularly compact design of the switching module saves both installation space and material. Since the vacuum interrupter is arranged in the immediate vicinity of the bridge switch, in particular one behind the other and separated by a plate, the available installation space is used to the maximum.
• the permanently formed fixed contacts and in particular their free ends are part of the bridge switch.
• the fixed contacts have two functions, namely current carrying and contacting.
• the plate not only holds all parts of the switching element, but also serves as an insulating medium between the potentials of the fixed contacts.
• the vacuum interrupter and the bridge switch are preferably arranged one behind the other with their axes parallel.
• the plate can be designed in any way and can be made of plastic, GRP or another electrically insulating plastic, for example.
• the bridge switch can be designed in any way, for example as a rotary switch, slide switch or toggle switch.
• the vacuum interrupter has a first contact and a second contact, the first contact has a first fixed contact and the second contact has a second fixed contact,
• the first fixed contact and the second fixed contact are formed such that they extend from the first side to the second side through the plate.
• the bridge switch has a movable bridge contact
• the movable bridge contact can assume at least three positions
• the bridge contact makes contact with at least one free end of the first fixed contact and at least one free end of the second fixed contact, individually or simultaneously, and these with the load dissipation connects.
• first fixed contact and the second fixed contact are each formed from one or two electrically conductive wires or conductive copper pieces. Each wire or piece of copper can be designed in one piece or in multiple pieces.
• the free ends of the fixed contacts can be arranged on the second side in such a way that they lie next to the vacuum interrupter behind them. The first fixed contact is placed in the first third of the vacuum interrupter and the second fixed contact is placed in the first opposite third of the vacuum interrupter.
• the bridge contact can have a housing with at least one contact lamella, which is electrically conductively connected to at least one contact lamella with the load dissipation device.
• the contact lamella can be designed in any way and consist, for example, of several inherently spring-loaded metal sheets or several spring-loaded contacts. Several contact blades can be provided.
• the invention proposes an on-load tap changer with a switching module, with a selector and a preselector being arranged on the plate of the switching module.
• this on-load tap changer is also particularly compact and takes up correspondingly little space, which entails a reduction in manufacturing costs and a saving in material.
• a switching resistor or a connecting piece to a choke is arranged on the plate.
• the on-load tap changer can be designed in any way as required and can be designed, for example, as a high-speed resistance switch or reactor switch.
• FIG. 1 shows a first side of a switching module
• FIG. 2 shows a second side of the switching module
• FIG. 3 shows a schematic sectional view of the switching module.
• FIG. 4 shows an on-load tap changer with a switching module.
• Identical reference symbols are used for elements of the invention that are the same or have the same effect. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures that are necessary for the description of the respective figure.
• the illustrated embodiments only represent examples of how the switching module according to the invention can be designed; and therefore do not constitute a final limitation of the invention.
• FIG. 1 shows a switching module 1 according to the invention for an on-load tap changer 2.
• the switching module 1 has a plate 3 which consists of a plastic, glass fiber reinforced plastic or some other electrically insulating material.
• a vacuum interrupter 10 is attached on a first side 3.1 of the plate 3.
• the vacuum interrupter 10 has a first contact 11 and a second contact 15 .
• the first contact 11 is designed as a movable contact and the second contact 15 as a fixed contact.
• the first contact 11 is movably mounted in a bearing block 30 .
• the bearing block 30 is mechanically connected to the plate 3 .
• a rocker arm 31 is attached to the bearing block 30 . A first end of the rocker arm 31 is mechanically connected to the first contact 1 1 .
• the second end of the rocker arm 31 opposite to the first end has a roller 34 .
• a cam disk 32 which is attached to a drive shaft 33, acts on the roller 34 of the rocker arm 31 when rotating, which leads to a movement of the first contact 11. In this case, the vacuum interrupter 10 is opened or closed.
• the bearing block 30 serves as a guide for the first contact 11 and as a bearing for the rocker arm 31 .
• the cam disk 32 is arranged on a second side of the plate 3 3.2.
• a first fixed contact 12 is mechanically and electrically conductively connected to the first contact 11. This is designed in two parts in the example shown here and consists of two bent, conductive wires.
• the first fixed contact 12 is electrically conductively connected at its ends to the first contact 11 and, on the other hand, its free ends 12.1, 12.2 protrude on the second side 3.2 of the plate 3.
• the two conductive wires of the first fixed contact 12 run laterally along the vacuum interrupter 10. In the first third of the vacuum interrupter, the wires bend and extend from the first side 3.1 of the plate 3 to the second side 3.2.
• a second fixed contact 16 is also electrically conductively connected to the second contact 15 of the vacuum interrupter 10 in an analogous manner.
• the second fixed contact 16 also consists of two conductive wires, the ends of which are mechanically and electrically connected to the second contact 15 on the one hand and the free ends 16.1, 16.2 on the other hand protrude on the second side 3.2 of the plate 3 next to the vacuum interrupter 10.
• the electrical connection between the second contact 15 and the second fixed contact 16, in particular the two conductive wires, can be done directly or by means of a conductive bridge 19.
• the first contact 11 is also electrically conductively connected to a selector arm or a throttle of the on-load tap changer 2 .
• the second contact 15 is electrically conductively connected to a switching resistor or a choke of the on-load tap changer 2 .
• the fixed contacts 12, 16 are inserted through the plate 3 or encapsulated by injection molding.
• FIG. 2 shows the second side 3.2 of the plate 3 of the switching module 1.
• the vacuum interrupter 10 is arranged immediately behind the bridge switch with a movable bridge contact 20 .
• the movable bridge contact 20 of the bridge switch 40 is arranged between the free ends 12.1, 12.2, 16.1, 16.2 of the projecting fixed contacts 12, 16.
• the movable bridge contact 20 has a first and a second contact lamella 21 , 22 which are arranged in a bearing manner on a housing 26 .
• the contact lamellae 21, 22 in a first position A only make contact with the free ends 12.1, 12.2 of the first fixed contact 12, in a second position B the free ends 12.1, 12.2, 16.1, 16.2 of the first and second fixed contact 12, 16 and in a third position C the free ends 16.1, 16.2 of the second fixed contact 16.
• the three positions A, B, C are contact 20 traversed by a linear movement of the movable bridge.
• a connecting rod 23 generates the linear movement by means of a first and a second gear wheel 24, 25 via the drive shaft 33.
• the contact lamellae 21, 22 are spring-mounted and electrically conductively connected to a load transfer device 35.
• the combination of the free ends 12.1, 12.2, 16.1, 16.2 of the fixed contacts 12, 16, the movable bridge contact 20 with the housing 26 and the contact lamellae 21, 22 forms the bridge switch 40.
• the movable bridge contact 20 of the bridge switch 40 is located directly behind the vacuum interrupter 10 or the vacuum interrupter 10 is located directly behind the movable bridge contact 20 of the bridge switch 40.
• the central axis 13 is the Vacuum interrupter 10 parallel to the central axis 18 of the movable bridge contact 20.
• FIG. 4 shows an on-load tap changer 2 with three switching modules 1 . These are on one each
• Switching module 1 has a selector, a preselector and a switching resistor arranged. It is driven by a motor that actuates the drive shaft 33 .

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
• Housings And Mounting Of Transformers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77126824

Family Applications (1)

Country Status (7)

Families Citing this family (1)

Family Cites Families (6)

• 2020
  • 2020-08-27 DE DE102020122450.8A patent/DE102020122450A1/de active Pending
• 2021
  • 2021-07-21 CN CN202180052058.9A patent/CN115917692A/zh active Pending
  • 2021-07-21 WO PCT/EP2021/070379 patent/WO2022042953A1/de active Application Filing
  • 2021-07-21 KR KR1020237008955A patent/KR20230054693A/ko active Search and Examination
  • 2021-07-21 US US18/042,222 patent/US20230298829A1/en active Pending
  • 2021-07-21 MX MX2023002299A patent/MX2023002299A/es unknown
  • 2021-07-21 EP EP21748588.7A patent/EP4197017A1/de active Pending

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