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
  • H01H9/0027—Operating mechanisms
• • 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
• • 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

Definitions

• the invention relates to an on-load tap changer according to the resistance principle.
• On-load tap-changers according to the resistance principle are basically based on two alternative basic principles. Either as a so-called load selector or as a diverter switch with a selector.
• DE 10 2013 107 545 A1 describes a load selector which performs the selection of the desired, new stage contact and the switchover from the current-current, old stage contact to the new stage contact in one go under load.
• the change-over performing diverter switch insert on which the vacuum interrupters, the movable contacts and the resistors are mounted, rotatably disposed in a sealed oil vessel.
• the invention proposes an on-load tap changer according to the resistance principle, comprising - a voter base plate;
• a diverter switch comprising a transient resistor and mounted to the diverter switch base plate
• a common drive shaft which actuates and / or drives the selector and the diverter switch.
• the on-load tap-changer is cost-effective in production due to the plate design, easy to install and safe to operate.
• the diverter switch is mounted with all its parts on the diverter switch base plate and the voter with all its parts on the voter base plate.
• the drive shaft actuates and / or drives the diverter switch and the selector in common. Due to the particularly simple structure, it is possible to variably arrange both the selector and the diverter switch of a phase, as well as the respective phases among themselves, at a distance from each other, depending on the voltage requirements.
• the selector base plate and the diverter switch base plate may be formed as desired in any manner, for example, an insulating material such as an insulating material.
• an insulating material such as an insulating material.
• Plastic or fiber-reinforced plastic in particular a mixture of polyamide or polyphthalamide with glass fibers.
• the diverter switch base plate is arranged parallel to the selector base plate.
• the drive shaft can be formed as desired in any manner, for example, such that it is constructed from one piece or from several parts.
• the on-load tap changer can have a preselector which is likewise actuated and / or driven by the common drive shaft.
• the preselector serves to switch a control winding in the same direction or in the opposite direction to a main winding.
• the selection can be arranged on the selector base plate, on-load tap-changer baseplate or a separate selection baseplate.
• the drive shaft can be driven directly by an electric motor. Between the electric motor and the drive shaft, a spring energy storage or an intermediate gear can be arranged.
• the on-load tap-changer comprises a rod mechanically connecting the selector base plate and the diverter switch base plate together.
• At least one additional rod or alternatively or in addition to the rods at least one spacer and / or at least one plate can be used.
• the connection can also be realized by means of spacers which are sprayed onto the selector base plate and / or the diverter switch base plate.
• the on-load tap-changer comprises
• a first driver on a first side of the selector baseplate, a first driver
• the drive shaft actuates and / or drives the two drivers.
• the on-load tap-changer comprises
• a first moving contact mechanically connected to the first Geneva wheel and selectively connectable to each of the fixed contacts on the first side;
• a second moving contact which is mechanically connected to the second Geneva wheel and can be selectively connected to each of the fixed contacts on the second side.
• the fixed contacts extend from the first page through the selector base plate to the second side.
• the on-load tap-changer comprises
• the on-load tap-changer comprises
• a tilting lever is arranged between the moving contact and the cam disc
• the on-load tap-changer comprises
• the arrangement of the individual parts, in particular vacuum interrupter, resistor and switching element can be distributed as required to the first and / or the second side of the diverter switch base plate. Also, the operation of the vacuum interrupter and the switching element can be done directly or via gears, Geneva wheels or connecting rods.
• the on-load tap-changer comprises
• the drive shaft also drives the other voters and the other diverter switch.
• the other voters such as the selector and / or the two other diverter switch are designed as the diverter switch. It may be specified that the on-load tap-changer comprises
• each selection base plate is arranged parallel to the respective selector base plate and / or the respective diverter switch base plate.
• At least one of the selector and at least one of the diverter switch and at least one of the optionally present preselector of at least one phase of a transformer are assigned.
• the on-load tap-changer comprises
• a bar that mechanically connects the voter base plates, the diverter switch base plates and the optional selector base plates to each other.
• At least one additional rod or alternatively or in addition to the rods at least one spacer and / or at least one plate can be used.
• the connection may also be realized by means of spacers sprayed onto the selector baseplates and / or the diverter switch base plates and / or the selector baseplates.
• FIG. 1 shows a first embodiment of a three-phase on-load tap-changer after
• FIG. 2 shows a first side of one of the selectors of the on-load tap-changer formed according to a preferred embodiment
• FIG. 3 a second side of the selector
• FIG. 4 the first page of the voter, with a wheel of Maltese removed
• FIG. 5 shows a first side of one of the load changeover switches of the on-load tap-changer formed in accordance with a preferred embodiment
• FIG. 6, a second side of the diverter switch;
• FIG. 7 the selector and the diverter switch in assembled condition;
• FIG. 8 shows a second embodiment of a three-phase on-load tap-changer according to the resistance principle.
• FIG. 1 is a schematic representation of a first embodiment of an on-load tap-changer 1 according to the resistance principle.
• the on-load tap-changer 1 here has three selectors 20 and three load changeover switches 40.
• Each selector 20 and each diverter switch 40 is associated with a particular phase of a tapped transformer (not shown).
• a single-phase variant of the on-load tap-changer 1 according to the invention would therefore have only one load changeover switch 40 and only one selector 20.
• Each selector 20 is mounted on a selector base 21 and each diverter switch 40 on a diverter switch base 41.
• the individual plates 21, 41 are pushed onto at least one rod 15 and are held over this.
• the attachment of the individual plates 21, 41 can also be done in other ways, e.g.
• a common drive shaft 10 drives all the selectors 20 and diverter switch 40.
• the drive shaft 10 extends through the individual plates 21, 41 to actuate the selectors 20 and the diverter switches 40.
• the drive shaft 10 is preferably actuated via a bevel gear 12 by a motor 13.
• the drive shaft 10 may also be formed directly actuated by a motor 13.
• the drive shaft 10 may be formed from one or more parts.
• FIG. 2 and FIG. 4 shows one of the selectors 20 of the on-load tap-changer 1 designed according to a preferred embodiment.
• the voter base plate 21 is preferably made of an insulating material such as plastic or fiber reinforced plastic (eg, a mixture of polyamide or polyphthalamide with glass fibers).
• the selector base plate 21 has a first side 22 and a second, opposite side 32 on.
• On the first side 22 a plurality of fixed contacts 18 are arranged, which are connected via lines 19 with winding taps of a control winding of the tapped transformer.
• the fixed contacts 18 extend from the first side 22 through the selector base plate 21 to the second side 32.
• the fixed contacts 18 are preferably made of copper and are additionally silvered.
• a first Geneva wheel 25 with a first movably mounted moving contact 23 is mounted on the first side 22.
• the first Geneva wheel 25 is rotatably mounted about an axis 1 1 on a first bearing axis 26.
• the bearing axis 26 is formed as a separate part mechanically connected to the selector base plate 21.
• the bearing axis 26 can be sprayed with in the manufacture of the selector base plate 21 and formed with this as a unit.
• a first driver 27 is arranged, which is actuated via the drive shaft 10 which extends through the selector base plate 20.
• the first driver 27, a first cam 28 which engages in the first Geneva wheel 25 and this rotates.
• the first driver 27 Upon actuation of the selector 20, the first driver 27 is rotated 360 °.
• the first Geneva wheel 25 When interacting with the first Geneva wheel 25, the first Geneva wheel 25 is turned only piecemeal, that is, by the fraction of a complete rotation with a complete rotation of the first driver 27.
• the continuous rotational movement of the first driver 27 is converted into a stepwise or piecewise rotation of the first Geneva wheel 25.
• the combination of a Maltese wheel and a driver allows even in the idle state, ie before or after the operation of the voter, a blocking function of both parts against each other.
• the first moving contact 23 Prior to the actuation of the first Geneva wheel 25, the first moving contact 23 always contacts one of the fixed contacts 18 and electrically conductively connects them to a terminal 29 of a first branch of the diverter switch 40.
• the selector 20 When the selector 20 is actuated, the first Geneva wheel 25 is rotated and the first moving contact is thereby produced 23 switched from this fixed contact 18 to a neighboring fixed contact 18.
• each fixed contact 18 takes place on the first side 22 at a first contact region 24 via the first moving contact 23.
• the second side 32 of the selector 20 is shown. Again, the fixed contacts 18 are connected via lines 19 with winding taps of the control winding of the tapped transformer. Furthermore, on the second side 32, a second Maltese wheel Mounted 35 with a second moving contact 33.
• the second Geneva wheel 35 is also rotatably mounted about the axis 1 1 on a second bearing axis 36.
• a second driver 37 is disposed adjacent to the second Geneva wheel 35 and is actuated by the same drive shaft 10 as the first driver 27. In this case, the second driver 37, a second cam 38 which engages in the second Geneva wheel 35 and this rotates.
• the first cam 28 is arranged offset to the second cam 38 and the drivers 27, 37 and thus the cams 28, 38 are arranged offset.
• the staggered arrangement of the cams 28, 38 or drivers 27, 37 results in a time-shifted actuation of the Geneva wheels 25, 35 and thus of the moving contacts 23, 33.
• the second moving contact 33 Prior to the actuation of the second Geneva wheel 35, the second moving contact 33 always contacts one of the fixed contacts 18 and electrically conductively connects it to a terminal 39 of a second branch of the diverter switch 40.
• the selector 20 When the selector 20 is actuated, the second Geneva wheel 35 is rotated, thereby causing the second moving contact 33 switched from this fixed contact 18 to a neighboring fixed contact 18.
• the moving contacts 23, 33 contact the same fixed contact 18. However, this may vary depending on the circuit. The contacting of each fixed contact 18 takes place on the second side 32 at a second contact region 34 via the second moving contact 33.
• FIG. 5 illustrates one of the load changeover switches 40 of the on-load tap-changer 1 designed in accordance with a preferred embodiment.
• the diverter switch base plate 41 is preferably made of an insulating material such as plastic or fiber reinforced plastic (eg, a mixture of polyamide or polyphthalamide with glass fibers) and has a first side 42 and a second, opposite side 52.
• a vacuum interrupter 43 is arranged, which is fastened by means of holders 44 to the diverter switch base plate 41.
• the vacuum interrupter 43 comprises a fixed contact 45 and a moving contact 46, via which the vacuum interrupter 43 is opened or closed.
• a cam disk 47 is mounted on the first side 42.
• a rocker arm 48 is rotatably mounted such that upon rotation of the cam plate 47, one end 50 of the rocker arm 48 a contour 49 of the cam 47 leaves and thereby the vacuum interrupter 43 is actuated, that closes or opens via the moving contact 46 ,
• the moving contact 46 is guided during actuation in a holder.
• the second side 52 of the diverter switch 40 is shown.
• a resistor 53 is arranged on the second side 52.
• a first gear 54 which corresponds to the cam disk 47 on the first side 42, rotatably supported on the second side 52.
• the drive shaft 10 passes through the cam disk 47, the diverter switch base plate 41 and the first gear 54 and drives the cam disk 47 and the first gear 54. Furthermore, a switching element 55, which is driven via a combination of a second gear 56 and a connecting rod 57, mounted on the second side 52. By actuating the drive shaft 10, the switching element 55 is actuated via the individual gears 54, 56 and the connecting rod 57. Here, therefore, the rotational movement of the drive shaft 10 is converted into a linear movement of the switching element 55.
• the switching element 55 is designed as a bridging switch.
• the switching element 55 may also be designed as a rotary switch.
• the arrangement of the individual parts, in particular the vacuum interrupter, the resistor and the switching element, can be distributed as required to the first and / or the second side of the diverter switch base plate.
• the operation of the vacuum interrupter and the switching element can be done via gears, Geneva wheels, connecting rods.
• FIG. 7 the selector 20 and the selector base 21 of FIG. 2 and 3 and the diverter switch 40 and diverter switch base 41 of FIG. Figures 5 and 6 associated with a phase are shown assembled.
• the voter base plate 21 is connected via two rods 15 to the diverter switch base plate 41.
• the drive shaft 10 passes through the drivers 27, 37, the cam plate 47 and the two base plates 21, 41st
• FIG. 8 a second embodiment of the on-load tap-changer 1 is shown schematically.
• the on-load tap-changer 1 has a preselector 60 for each phase, which is also actuated by the common drive shaft 10.
• the preselector 60 serves to switch a control winding of the respective phase in the same direction or in the opposite direction to a corresponding main winding.
• Each preselector 60 is mounted on a separate preselector base plate 61, but may also be mounted on the selector base plate 21 or the on-load tap-changer base plate 41 of the respective phase as needed.
• the operation of the preselector 60 can be done directly via the drive shaft 10 or indirectly, for example via a transmission.
• REFERENCE NUMBERS REFERENCE NUMBERS

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Housings And Mounting Of Transformers (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Mechanisms For Operating Contacts (AREA)
• Transmission Devices (AREA)
• Motor And Converter Starters (AREA)
• High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
• Liquid Developers In Electrophotography (AREA)
• Discharge Heating (AREA)
• Amplifiers (AREA)
• Emergency Protection Circuit Devices (AREA)

Priority Applications (12)

Applications Claiming Priority (2)

Publications (1)

Family

ID=58264517

Family Applications (1)

Country Status (13)

Cited By (2)

Families Citing this family (14)

Citations (8)

Family Cites Families (10)

• 2016
  • 2016-03-11 DE DE102016104500.4A patent/DE102016104500B3/de active Active
• 2017
  • 2017-03-08 PL PL17709649.2T patent/PL3427284T3/pl unknown
  • 2017-03-08 ES ES17709649T patent/ES2960327T3/es active Active
  • 2017-03-08 WO PCT/EP2017/055392 patent/WO2017153448A1/de not_active Ceased
  • 2017-03-08 JP JP2018544089A patent/JP7000332B2/ja active Active
  • 2017-03-08 AU AU2017229282A patent/AU2017229282B2/en active Active
  • 2017-03-08 CN CN201780005054.9A patent/CN108431920B/zh active Active
  • 2017-03-08 MX MX2018010951A patent/MX392366B/es unknown
  • 2017-03-08 US US16/080,677 patent/US11004622B2/en active Active
  • 2017-03-08 HR HRP20231216TT patent/HRP20231216T1/hr unknown
  • 2017-03-08 KR KR1020187024536A patent/KR102446586B1/ko active Active
  • 2017-03-08 EP EP17709649.2A patent/EP3427284B1/de active Active
• 2018
  • 2018-07-09 ZA ZA2018/04551A patent/ZA201804551B/en unknown

Patent Citations (8)

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