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
  • H01H9/0044—Casings; Mountings; Disposition in transformer housing
• • 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
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
  • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
  • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
• • 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 an on-load tap changer for uninterrupted load switching between different winding taps of a tap transformer.
• the invention also relates to a step transformer with an on-load tap changer for uninterrupted load switching between different winding taps of the step transformer.
• On-load tap-changers are known from the prior art and mostly 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 voter is made up of a large number of bars arranged in a circle. Contacts, which serve as connections for a regulating winding, are arranged on these bars in different levels. Inside the voter, two voter arms are attached to a switching column. These make contact with the contacts on the bars. Diverter switch and selector are connected to one another via a gearbox.
• the contacts of the selector are connected to the winding taps of a control winding. Because the contacts are arranged in a circle, the lines to the control winding must be made very long in some cases.
• the cables in the step transformer need a lot of space, as the prescribed isolation distances between the cables must be observed.
• the object of the invention is to create an on-load tap-changer which is simple and compact and can therefore be installed in a tap-changer in a simple and space-saving manner.
• Another object of the invention is to create a step transformer with an on-load tap changer that is simple and compact.
• the invention proposes an on-load tap-changer for uninterrupted load switching between different winding taps of a tap-changer, comprising an on-load tap-changer plate, a selector and a diverter switch, the selector and diverter switch being mounted on the on-load tap-changer plate.
• an on-load tap-changer plate By mounting the diverter switch and the selector and in particular the respective individual parts on an on-load tap-changer plate, the on-load tap-changer becomes smaller and more compact overall.
• an on-load tap-changer plate can be fitted in a tapped transformer in a particularly space-saving manner and connected to other on-load tap-changer plates in different ways.
• the diverter switch comprises a vacuum interrupter, a transition resistor and a bridge switch.
• the diverter switch can be designed in any manner as required and, for example, comprise at least one additional or further vacuum interrupter and / or one additional or further transition resistor and / or one additional or further bridge switch.
• the diverter switch can be designed in any manner as required and, for example, comprise at least one current-limiting element or a connection for a current-limiting element.
• the current-limiting element can be designed as a transition resistor, reactance, varistor or the like.
• the vacuum interrupter is mounted on a first side of the on-load tap-changer plate and the transition resistor and the bridge switch are mounted on a second, opposite side of the on-load tap-changer plate. This is particularly space-saving, as the essential parts are distributed on both sides of the on-load tap-changer plate. The installation space is optimally used.
• the on-load tap-changer can be designed in any manner as required and, for example, have the vacuum interrupter and / or the transition resistor and / or the bridge switch arranged only on the first side or only on the second side.
• the voter comprises a first voter arm, a second voter arm and voter contacts.
• the selector contacts extend from a first side of the on-load tap-changer plate to a second side of the on-load tap-changer plate.
• the voter includes a preselector.
• first selector arm is mounted on the first side of the on-load tap-changer plate and the second selector arm and the preselector on the on the second, opposite side of the on-load tap-changer plate.
• the selector can be designed in any desired manner as required and, for example, can be constructed in a rotary or linear manner.
• the selector arms can be arranged on a first side of the on-load tap-changer plate and the preselector on the second side of the on-load tap-changer plate.
• the preselector can also be designed to be rotary or linear.
• the on-load tap-changer plate is cuboid and connections for the selector are arranged on one side in a wall element.
• the targeted arrangement of the selector connections on one side makes it easier to connect them to the winding taps of a control winding of a step transformer.
• the on-load tap-changer has three on-load tap-changer plates, each with a diverter switch and each with a selector.
• the three on-load tap-changer plates are then mechanically connected to one another via a frame.
• the diverter switches and selectors on the on-load tap-changer plates are operated via a common drive shaft by means of a Geneva wheel, driver, gear wheel or the like.
• the frame can be designed in any way as required and consist, for example, of four rods and a top plate.
• the on-load tap-changer plates are then positively and / or non-positively connected to the rods.
• the on-load tap-changer plates can be arranged in relation to one another as required.
• the on-load tap-changer plates can be arranged horizontally or vertically in different levels.
• the on-load tap-changer plates can be arranged horizontally or vertically in a common plane.
• the invention proposes a step transformer with an on-load tap changer which is arranged in the interior of the step transformer next to and / or above and / or below an active part.
• the on-load tap-changer plate of the on-load tap-changer is aligned horizontally or vertically with respect to the active part.
• a motor for actuating a drive shaft of the on-load tap changer is arranged inside the tap transformer or outside the tap transformer. It can be provided that a motor is connected directly to the drive shaft or indirectly to the drive shaft of the on-load tap-changer via a gear, angular gear or linkage.
• the on-load tap-changer is fastened via a head plate on the yoke of the active part or on the housing, in particular the cover or a wall of the tap-changer.
• FIG. 1a and 1b show a first embodiment of an on-load tap-changer
• 3 to 14 show a step transformer with different embodiments and arrangements of the on-load tap changer.
• FIGS. 1a and 1b show an on-load tap-changer 1 according to the invention.
• This has an essentially rectangular on-load tap-changer plate 2, which is designed as a cuboid, rectangular or rectangular.
• the on-load tap-changer plate 2 has a first side 3 and a second, opposite side 4.
• a selector 5 and a diverter switch 6 are mounted on the on-load tap-changer plate 2.
• the diverter switch 6 has a vacuum interrupter 7, a transition resistor 8 and a bridge switch 9.
• the voter 5 has a first voter arm 5.1 and a second voter arm 5.2.
• the selector 5 has selector contacts which are connected via corresponding connections 10 to winding taps, not shown here, of a regulating winding.
• the selector 5 is designed to be rotatory in the embodiment shown here.
• the selector contacts are arranged in a circle and extend from the first side 3 through the on-load tap-changer plate 2 to the second side 4.
• the selector arms 5.1, 5.2 are rotatably mounted on a bearing axis and perform a rotary movement in which the corresponding selector contacts are contacted.
• the first voter arm 5.1 is on the arranged on the first side 3 of the on-load tap-changer plate 2 and the second selector arm 5.2 is arranged on the second, opposite side 4.
• the selector contacts are also arranged on both sides 3, 4 of the on-load tap-changer plate 2.
• the individual parts of the diverter switch 6 are also arranged on the first side 3 and on the second side 4 of the on-load tap-changer plate 2 in this embodiment.
• the bridge switch 9 is mounted on the second side 4.
• the vacuum interrupter 7 and the transition resistor 8 are mounted on the first side 3.
• the on-load tap-changer 1 has exactly one vacuum interrupter 7 and exactly one bridge switch 9.
• several vacuum interrupters, several bridge switches and also further switches or switching contacts can be mounted on the on-load tap-changer plate 2.
• the transition resistor 8 has a modular design and can be expanded, i.e. enlarged or reduced, depending on the requirements.
• the on-load tap-changer plate 2 consists of an insulating material such as plastic, polyamide, polyphthalamide with glass fibers, GRP or hard paper.
• the on-load tap-changer plate 2 can be designed as a plastic injection molding.
• the on-load tap-changer plate 2 has wall elements 11, 12 on the outer edges.
• the connections 10 of the selector 5 and in particular the selector contacts are arranged in a first wall element 11 of the on-load tap-changer plate 2.
• the connection for the star point is arranged in an opposite, second wall element 12 of a second outer edge of the on-load tap-changer plate 2. Because all connections 10 of the selector 5 are arranged in a wall element 11, that is to say on one side of the on-load tap-changer plate 2, the on-load tap-changer 2 can be aligned or placed particularly optimally in the direction of the control winding.
• the connection of the selector 5 to the control winding is particularly simple.
• any current-limiting element can also be arranged or mounted on the on-load tap-changer plate 2.
• This can be a reactance in the form of a coil or winding or a varistor.
• connections can be provided on the on-load tap-changer plate, which make it possible, for example, to connect a reactance which is arranged in the immediate vicinity of the on-load tap-changer plate.
• FIG. 2 shows the on-load tap-changer 1 according to the invention with three on-load tap-changer plates 2. These are mechanically connected to one another via four rods 20 and a top plate 21. The rods 20 and the top plate 21 form a frame 22.
• a motor 23 for actuating the on-load tap-changer 1 is arranged on the top plate 21.
• the motor 23 drives a drive shaft 24 which extends through the three on-load tap-changer plates 2 and actuates the respective diverter switch 6 and selector 5.
• the three on-load tap-changer plates 2 are arranged horizontally one above the other in three planes. However, it is also possible to arrange the three on-load tap-changer plates 2 next to one another in one plane. Furthermore, it is possible that only a single on-load tap-changer plate 2 and a top plate 21 are combined.
• a motor 23, which actuates the on-load tap-changer 1 via the drive shaft 24, is then likewise arranged on the top plate 21.
• the connections 10 of the individual selector 5 are arranged on one side of the on-load tap-changer plate or aligned in a common direction.
• FIG. 3 shows a first embodiment of a step transformer 30 with an on-load tap-changer 1 according to the invention.
• the on-load tap-changer 1 comprises three on-load tap-changer plates 2, which are horizontally aligned and arranged one above the other next to an active part 31.
• the motor 23 is arranged on the top plate 21 in the interior of the step transformer 30.
• the power supply of the motor 23 via the control unit 14 takes place via a cable 32 which is led from the inside of the step transformer 30 to the outside.
• the on-load tap-changer 1 is attached to the yoke 33 of the active part 31 or to the cover 34 of the tap-changer 30.
• the connections 10 of the selector are preferably directed towards the active part 31 and thus towards the taps of the control winding.
• FIG. 4 shows a further embodiment of a step transformer 30, in which the motor 23 of the on-load tap changer 1 is arranged outside the step transformer 30; here on the cover 34.
• the motor 23 can also be attached to any other outer wall of the step transformer 30. Then, however, the motor is connected to the on-load tap-changer 2 and in particular its drive shaft 24 via a linkage or angular gear.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• FIG. 5 shows a further embodiment of a step transformer 30 with an on-load tap changer 1.
• the on-load tap-changer 1 is arranged above the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged vertically next to one another.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• the engine 23 of the On-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 6 shows a further embodiment of a step transformer 30 with an on-load tap changer 1.
• the on-load tap-changer 1 is arranged below the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged vertically next to one another.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the bottom part via the top plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 7 shows a further embodiment of a step transformer 30 with an on-load tap changer 1.
• the on-load tap-changer 1 is arranged above the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally next to one another in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30. This arrangement of the on-load tap-changer plates 2 in one plane is particularly space-saving.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 8 shows another embodiment of a step transformer 30 with an on-load tap-changer 2.
• the on-load tap-changer 2 is arranged below the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally next to one another in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the bottom part via the top plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 9 shows a further embodiment of a step transformer 30 with an on-load tap-changer 1.
• the on-load tap-changer 1 is arranged next to the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally one below the other in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• This arrangement variant is also particularly space-saving.
• the on-load tap-changer 1 can therefore be attached particularly close to the active part 31.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• Figure 10 shows a further embodiment of a step transformer 30 with a On-load tap-changer 1.
• the on-load tap-changer 1 is arranged below the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally next to one another in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the bottom part via the top plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 11 shows a further embodiment of a step transformer 30 with an on-load tap changer 1.
• the on-load tap-changer 1 is arranged above the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally next to one another in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 12 shows a further embodiment of a step transformer 30 with an on-load tap changer 1.
• the on-load tap-changer 1 is arranged in front of, behind or next to the active part 31.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally next to one another in one plane.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• This arrangement variant is also particularly space-saving.
• the on-load tap-changer 1 can therefore be attached particularly close to the active part 31.
• the on-load tap-changer 1 can be fastened via the head plate 21 to the yoke 33 of the active part 31, the cover 34 or a wall.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 13 shows a further embodiment of a step transformer 30 with an on-load tap-changer 1.
• the on-load tap-changer 1 is arranged next to the active part 31 in the upper area.
• the on-load tap-changer 1 has three on-load tap-changer plates 2 which are arranged horizontally one behind the other.
• the motor 23 is arranged on the head plate 21 in the interior of the step transformer 30.
• This arrangement variant is also particularly space-saving.
• the on-load tap-changer 1 can therefore be attached particularly close to the active part 31.
• the housing of the step transformer 30 can be designed to be particularly space-saving.
• the volume below the on-load tap-changer 1 can be dispensed with.
• the on-load tap-changer 1 can be attached to the yoke 33 of the active part 31 or to the cover 34 via the head plate 21.
• the motor 23 of the on-load tap-changer 1 can also be arranged outside the tap-changer 30.
• FIG. 14 shows a further embodiment of a step transformer 30 with three on-load tap-changers 1.
• Each on-load tap-changer 1 has a top plate 21 and an on-load tap-changer plate 2.
• a motor 23 is arranged on each head plate 21. All motors 23 are connected to a control unit 14 outside the step transformer 30.
• the individual on-load tap-changers 1 can be arranged in different ways in the vicinity of the active part. This embodiment is also particularly space-saving.
• the housing of the step transformer 30 can be designed to be particularly space-saving.
• the on-load tap changer 1 can also be arranged outside the step transformer 30. This is then screwed or attached to the step transformer in its own housing.
• the motor 23 can be arranged outside on the housing of the on-load tap-changer 1 or in the housing of the on-load tap-changer 1.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Housings And Mounting Of Transformers (AREA)
• Control Of Electrical Variables (AREA)
• Protection Of Transformers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72717880

Family Applications (1)

Country Status (9)

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• 2019
  • 2019-11-19 DE DE102019131169.1A patent/DE102019131169B3/de active Active
• 2020
  • 2020-10-01 EP EP20785740.0A patent/EP4046177A1/de active Pending
  • 2020-10-01 WO PCT/EP2020/077539 patent/WO2021099022A1/de unknown
  • 2020-10-01 BR BR112022007590A patent/BR112022007590A2/pt unknown
  • 2020-10-01 CN CN202080079284.1A patent/CN114667581A/zh active Pending
  • 2020-10-01 JP JP2022525267A patent/JP2023501215A/ja active Pending
  • 2020-10-01 KR KR1020227017908A patent/KR20220098748A/ko unknown
  • 2020-10-01 MX MX2022006034A patent/MX2022006034A/es unknown
  • 2020-10-01 US US17/775,892 patent/US20220392717A1/en active Pending

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