US3366750A - Switching mechanism for tapped regulating transformers - Google Patents

Switching mechanism for tapped regulating transformers Download PDF

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US3366750A
US3366750A US396243A US39624364A US3366750A US 3366750 A US3366750 A US 3366750A US 396243 A US396243 A US 396243A US 39624364 A US39624364 A US 39624364A US 3366750 A US3366750 A US 3366750A
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pair
contacts
fixed
switches
selector
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Bleibtreu Alexander
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Scheubeck GmbH and Co
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Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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    • 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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • 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

Definitions

  • SWITCHING MECHANISM FOR TAPPED REGULATING TRANSFORMERS Filed Aug. 14, 1964 1 5 Sheets-Sheet 5 Mm WM WW/m M WWW 2W United States Patent ABSTRACT OF THE DISCLOSURE
  • a switching system for tapped high-voltage polyphase regulating transformers of great compactness including transfer switches and selector switches arranged in coaxial relation at predetermined levels, minimizing voltage gradients, insulation requirements, and lengths of current paths.
  • This invention is concerned with switching systems for tapped regulating transformers, or load tap changers, i.e. with the switching means required for performing tapchanging operations.
  • Another object of this invention is to provide improved switching systems for tapped high voltage polyphase transformers combining a favorable spatial voltage distribution with great compactness and simple kinematic means for operating the movable contact means of the selector switch provided for selecting the desired transformer taps.
  • Another object of the invention is to combine the general arrangement of parts disclosed in the copending patent application of Alexander Bleibtreu et al. filed June 19, 1962, Ser. No. 204,029, Load Tap Changers for Transformers, now US. Patent 3,176,089, Mar. 30, 1965 (assigned to the same assignee as the present invention) with an improved selector switch structure and with an improved operating mechanism for the latter.
  • This invention is more particularly concerned with Jansen type load tap changers.
  • load tap changers include ohmic resistors as current-limiting devices to limit the transient currents occurring during tap-changing operations and include fast operating transfer switches for switching or tap-changing operations to be performed under load or even under overload currents.
  • the movable contacts of the transfer switches are generally operated by spring motors and move at high speeds, thus minimizing the times during which the current-limiting switch-over resistors or tapchanging resistors must carry currents.
  • the rapid operation of the transfer switches makes it possible to minimize the size of the aforementioned resistors and to minimize voltage fluctuations resulting from tap changes.
  • Systems embodying this invention include a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate or auxiliary contacts, and movable contact means sequentially engageable with said pair of fixed main contacts and with said intermediate fixed contacts.
  • a pair of circular slip-ring-like terminals surrounds each of said plurality of transfer switches.
  • Each of said pair of circular terminals is conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches.
  • Said pair of circular terminals of each of said plurality of transfer switches is arranged coaxially around a common axis.
  • Switching systems embodying this invention further include a plurality of switch-over resistor means each operatively related to one of said plurality of transfer switches to limit currents flowing during tap-changing operations thereof.
  • Each of said plurality of resistor means has one end conductively connected to said fixed intermediate contacts of one of said plurality of transfer switches and an opposite end conductively connected to one of said pair of circular terminals of one of said plurality of transfer switches.
  • Each of said plurality of switch-over resistor means is arranged at substantially the same level as one of said plurality of transfer switches.
  • Switching systems embodying this invention further include a plurality of stacked selector switches each arranged at substantially the same level as one of said plurality of transfer switches.
  • Each of said plurality of selector switches includes a plurality of fixed selector switch contacts arranged in a circular pattern around the aforementioned common axis.
  • Each of said plurality of selector switches further includes a pair of switching bridges hav ing radially outer ends cooperating with said plurality of selector switch contacts thereof and having radially inner ends cooperatively engaging said pair of slip-ring-like circular terminals of one of said plurality of transfer switches.
  • Switching systems embodying this invention further include a pair of operating rods extending parallel to the aforementioned common axis and angularly displaced degrees. Each of this pair of operating rods projects transversely across one of said pair of switching bridges of each of said plurality of said selector switches.
  • Switching systems embodying this invention further include means for alternately pivoting each of said pair of operating rods about said common axis in steps having a predetermined angle.
  • FIG. 1 is a diagrammatic representation of the constituent parts pertaining to one single phase of a switching mechanism embodying the present invention
  • FIG. 2 is a diagrammatic representation of a tapped three phase auto transformer, this type of transformer being particularly suited to be associated with switching mechanisms embodying the present invention
  • FIG. 3 is a diagrammatic representation of a delta connected tapped three phase transformer, this being another type of circuitry particularly suited to be associated with switching mechanisms embodying the present invention
  • FIG. 4 is a vertical section of a polyphase switching mechanism embodying the present invention including the gear means for operating the same, the constituent transfer switches of the structure of FIG. 4 being shown in diagrammatic fashion and the constituent selector switches of the structure of FIG. 4 being shown in considerable detail;
  • FIG. 5 is a top plan view of the structure of FIG. 4 showing the same as it appears upon removal of a cover by which it is normally covered;
  • FIG. 6 is a vertical longitudinal or radial section of one of the switching bridges comprised in the structure of FIGS. 4 and 5, this section being taken along VI-VI of FIG. 7;
  • FIG. 7 is a top plan view of the switching bridge of FIG. 6 and of parts operatively related to the same.
  • FIG. 1 reference character T has been applied to indicate the winding of phase U of a polyphase transformer.
  • Transformer winding T is provided with ten taps designated K, 1, 2, 3 6, 7, 8, 9. Each transformer tap is conductively connected to a corresponding fixed contact 18 in a selector switch generally designated by the reference character 11.
  • Selector switch 11 comprises ten fixed contacts K, 1', 2, 3' 6', 7', 8, 9' which are arranged in a common plane in circular pattern around a center.
  • Transfer switch 10 includes two fixed circular terminals 14 and 15 arranged in concentric relation to the family of fixed contacts 18 of selector switch 11.
  • Transfer switch 10 further includes a movable reciprocating contact 10d pivoted in the center of circular terminals 14, 15 and cooperating with fixed contacts 10a, 10b, 10c.
  • Contacts 10a, 100 are fixed main contacts directly conductively connected to circular terminals 15 and 14, respectively.
  • Contacts 1012 are fixed intermediate contacts.
  • Each of the two intermediate contacts 10b is conductively connected to one of the circular terminals 14 and 15, respectively, by the intermediary of one of the two ohmic change-over or tap-changing resistors 12.
  • the structure of FIG. 1 further comprises a pair of switching bridges 26 and 27, respectively.
  • Switching bridges 26 and 27 are adapted by means which are described below more in detail to be pivoted about the center of circular terminals 14 and 15.
  • the radially inner end of switching bridge 26 slides along circular terminal 14, while its radially outer end disengages from one of the fixed contacts 18 of selector switch 11 and engages another such contact.
  • Switching bridge 27 performs in a similar fashion when pivoted about the center of terminals 14 and 15, i.e. the radially inner end of switching bridge 27 slides along terminal 15, while its radially outer end disengages fixed contact 1' of selector switch 11 and may be moved into engagement with fixed contact 3' thereof.
  • switching bridge 27 When tap 2 is included in the circuit, switching bridge 27 is in its position shown in FIG. 1 and transfer switch 10 is in the limit position opposite to the limit position shown in FIG. 1. If it is now desired to include tap 3 into the circuit, switching bridge 27 is pivoted counter clockwise so that its radially outer end engages the fixed contact 3 of selector switch 11, and thereupon transfer switch 10 is pivoted counter clockwise back to the position shown in FIG. 1.
  • switching bridge 26 is pivoted clockwise so that its radially outer end engages again the fixed contact K of selector switch 11, and thereupon transfer switch 10 is pivoted counter clockwise to the position shown in FIG. 1.
  • each of the three tapped phase windings T is provided with ten taps of which the first is designated by the reference letter K and the last by the reference numeral 9.
  • Taps 1 to 8 are arranged between tap K and tap 9 of each phase winding T, of the three phases U, V, W.
  • the switching mechanism of FIGS. 4 and 5 is intended to be operatively associated with three tapped transformer phase windings T as shown in FIGS. 2 and 3, each including ten taps K, 1, 2, 3 '7, 8, 9.
  • FIGS. 4 and 5 the structure shown therein comprises three stacked transfer switches 10, each for switching one phase of a polyphase circuit.
  • Each of the three transfer switches 10 comprises a pair of switchover resistors, or tap-changing resistors 12.
  • Transfer switches 10 may be designed as explained more in detail in connection with FIG. 1.
  • Each of the three transfer switches 10 encompasses a region of equal potential and it is necessary, or desirable, to arrange the switchover resistors or tap changing resistors 12 pertaining to each transfer switch 10 at about the same level, and inside of the region of substantially equal potential, of each transfer switch 10.
  • Patent 3,176,089 shows a very practical way of arranging the switch-over or tap changing resistors pertaining to a transfer switch at the same level as the other constituent elements of the respective transfer switch and of arranging these resistors in accordance with the voltage distribution prevailing along a stack of transfer switches.
  • the above application shows in greater detail the structural features of transfer switches intended to actually take the place of transfer switches 10 diagrammatically shown in FIG. 1.
  • a single-phase transfer switch and the movable contacts of the three transfer switches 10 are coupled for joint operation as, for instance, by means of a common pivotable reciprocating operating shaft (not shown) of insulating material, or at least in part of insulating material.
  • Reference numeral 11 has been applied in FIG. 4 to indicate three selector switches each for one phase of one of the tapped phase windings T of FIGS. 2. and 3. Each of the three selector switches 11 corresponds to the selector switch 11 of FIGS. 1.
  • the lowest selector switch 11 of FIG. 4 is arranged at substantially the same level as the lowest transfer switch 10, and the highest selector switch 11 is arranged at substantially the same level as the highest transfer switch 10.
  • the intermediate selector switch 11 is arranged atsubstantially the same level as the, intermediate transfer switch 10.
  • Thethree stacked transfer switches 10 are arranged inside of a cylindrical housing 13 of insulating material. Each transfer switch 10 is associated with a pair of circular terminals or contact rings 14, 15. The three pairs 1 of circular terminals or contact rings -14, 15 are supported by housing 13, each pair being arranged at the same level as one of the transfer switches 10.
  • the stack of transfer switches and the stack of selector switches 11 is supported by a base plate 17. Three insulating bushings 16 project through base plate 17, each for connecting one of transfer switches 10 to an external point of a polyphase circuit.
  • the fixed contacts K, 1, 2, 3 '7, 8', 9' of each of the three selector switches 11 are supported by a system of vertical rods 18 of insulating material. These rods are arranged in a cylindrical surface coaxial to cylindrical housing 13. The lower ends of insualting rods 18 are secured to the aforementioned base plate 17, whereas their upper ends are secured to a horizontal cover plate 19 extending substantially parallel to base plate 17. Each insulating rod 18 supports three fixed contacts each forming part of one of selector switches 11. Thus the insulating rod 18 to the left of FIG.
  • FIG. 4 supports three fixed contacts 2', one being conductively connected to tap 2 of a winding T, of phase U, one being conductively connected to tap 2 of a winding T of phase V and one being conductively connected to tap 2 of winding T,- of phase W.
  • the right of FIG. 4 shows an insulating rod 18 supporting three fixed contacts 3, one being conductively connected to tap 3 of winding T of phase U, one to tap 3 of winding T of phase V and one to tap 3 of winding T of phase W.
  • Two operating rods or shafts 20, 21 made wholly, or at least in part, of insulating material extend parallel to the axis of insualting housing 13 and are arranged in the space between housing 13 and the coaxial cylindrical surface defined by insulating rods 18.
  • Shafts or operating rods 20, 21 are angularly displaced 180 degrees and arranged in a common vertical plane with the vertical axis of housing 13 which is also the common axis of the annular terminals 14, 15 of the three transfer switches 10.
  • Base plate 17 and cover plate 19 define slots receiving the ends of insulating shafts 20, 21.
  • Shaft 20 supports on the upper end thereof a geneva gear 22 and shaft 21 supports at the upper end thereof ageneva gear 23.
  • Shaft 20 further supports on the ends thereof a pair of pinions 24 and shaft 21 supports on the ends thereof a pair of pinion 25.
  • Shaft 20 extends transversely across three switching bridges 26 each having a radially inner end slidably engaging one of the three circular terminals or rings 14, and each having a radially outer end cooperating With one of the even numbered fixed contacts K, 2', 4' 6, 8 of one of the three stacked selector switches '11.
  • Shaft 21 supports three switching bridges 27 each having a radially inner end slidably engaging one of the three circular terminals or rings 15, and each having a radially outer end engaging one odd numbered fixed contact 1, 3 7', 9 of one of the three stacked selector switches 11.
  • each pair of switching bridges 26, 27 is arranged at substantially the same level as, and operatively related to, one of the stacked transfer switches 10. As mentioned above, and as will be more fully apparent from what follows, the radially outer ends of switching bridges 26 cooperate with the even numbered fixed contacts K, 2, 4, 6 and 8 of selector switches 11 and switching bridges 27 cooperate with the odd numbered fixed contacts 1', 3, 5', 7' and 9 of selector switches 11.
  • Rotatable main driving gear28 is arranged below cover plate 19 in coaxial relation to terminal rings 14, 15 and provided with a radially outwardly projecting arm 29 supporting a vertical stud or pin-3t for operating geneva gears 22 and 23.
  • Geneva gear 22 is mounted on insulating shaft 20 and provided with four radialslots 31 which are angularly displaced 90 degrees.
  • geneva 6 gear 23 is mounted on insulating shaft 21 and provided with four radial slots 32 which are angularly displaced degrees.
  • Gear 28 is in meshing engagement with a pinion 33 mounted on shaft 34 supporting worm gear 35 arranged in the head portion 36 of the switching device.
  • Worm gear 35 is in meshing engagement with worm 37 operated by an electric motor drive (not shown). The latter is used to load a spring motor (not shown) for jointly operating with a snap action the three transfer switches 10.
  • Reference numeral 39 has been applied to indicate a pair of gears coaxial to main gear 28, of which one is supported by base plate 17 and the other by cover plate 19.
  • Lower gear 39 is in meshing engagement with pinions 24, 25 at the lower ends of shafts 20 and 21, and
  • upper gear 39 is in meshing engagement with the pinions 24, 25 at the upper ends of shafts 20 and 21.
  • switching bridges 26 engage cooperatively and slide upon circular terminals 14.
  • radially inner ends of switching bridges 27 engage cooperatively and slide upon circular terminals 15.
  • the constituent metal shells 40, 41 of switching bridges 26, 27 are held in alignment by vertical rods 42 and spring-biased toward each other and into engagement with their radially outer cooperating fixed contacts and with the radially inner cooperating circular transfer switch terminals 14, 15.
  • Circular terminals or terminal contacts 14, 15 are made up of two parts defining an annular recess therebetween. As shown in FIGS.
  • annular recess 46 receives a ring-shaped plate 45 of insulating material slidably fitted into recess 46, and thus capable of being pivoted, or rotated, about the common axis of housing 13 and of the cylindrical cage formed of insulating rods 18.
  • Ring shaped plate 45 is provided with an integral radially outwardly extending tab-like projection 44 sandwiched between the two shells 40 and 41.
  • Projection 44 is provided with transverse bores for the passage of rods 42 and with transverse bores for the passage of a pair of helical springs 43
  • Springs 43 bias shells 40, 41 toward each other and into firm engagement with their cooperating contacts at the radially outer ends thereof and into firm engagement with terminals 14 at the radially inner ends thereof.
  • Shells 40, 41 define openings 47 about midway between the ends thereof and insulating shaft 20 projects loosely through openings 47 and is supported in a roller bearing 48 integral with tab-like projection 44 of ring shaped plate 45.
  • switching bridges 27 is substantially identical to that of switching bridges 26, except that insulating shaft 21 projects transversely through the former and that the radially inner ends of the former engage circular terminals 15 rather than circular terminals 14.
  • FIGS. 4-7 The operation of the structure of FIGS. 4-7 is as follows.
  • gear drive 37, 35, 34 and 33 causes rotation of main gear 28.
  • Rod 30 on arm 29 of main gear 28 engages and operates one of the geneva gears 22, 23 following each half revolution of main gear 28.
  • Each engagement of rod 30 with one of geneva gears 22, 23 results in a rotation of the latter of 90 degrees.
  • shafts 20, 21 are sequentially rotated in steps of 90 degrees, i.e. shafts 20, 21 are alternately rotated in steps of 90 degrees.
  • Rotation of shafts 20, 21 results in rotation of pinions 24, 25 meshing with gears 39, 39. Consequently shafts 20, 21 are pivoted in steps encompassing equal predetermined angles about the central axis of the composite selector and transfer switch stack.
  • switching bridges 26 engage sequentially the even numbered fixed selector switch contacts K, 2', 4', 6' and 8' of selector switches 11, and as a result of the pivotal movements of shaft 21 switching bridges 27 engage sequentially the odd numbered fixed selector switch contacts 1', 3', 7 and 9 of selector switches 11.
  • 21 and contact bridges 26, 27 the radially inner ends of the latter remain in engagement with annular terminals 14, 15 of transfer switches 10. The latter perform all the required load and overload current switching operations.
  • the selector switches 11 do not open current-carrying circuits and do not close such circuits.
  • Each of said pair of fixed main contacts 10, 10c is conductively connected with one of said pair of slip-ring-like fixed contacts and fixed auxiiiary contacts 10b, 1012 are arranged between said pair of fixed main contacts 10a, 1017.
  • Each of said switch-over resistor means 12, 12 has one end conductively connected to one of said fixed auxiliary contacts 1%, 10b and an end opposite to said one end conductively connected to one of the slip-ring-like fixed contacts 14, 15.
  • Transfer switch 10 further includes movable contact means 10d cooperating in a predetermined sequence with said pair of fixed main contacts 10a, 10c and said fixed auxiliary contacts 10b, 1%.
  • a phase unit in a switching system embodying this invention includes further a selector switch 11 arranged at substantially the same level as said transfer switch 10.
  • Selector switch 11 includes a first group of circularly arranged spaced fixed contacts 1', 3, 5' positioned at substantially the same level as one of said pair of slipring-like fixed contacts 14, and said selector switch further includes a second group of circularly arranged spaced fixed contacts K, 2', 4' positioned at substantially the same level as the other of said pair of slipring-like fixed contacts 14, 15.
  • Selector switch 11 further includes a pair of radially extending contact bridges 26, 27 angularly displaced 180 degrees relative to each other pivotable about the axis of housing 13.
  • a switching system for tapped regulating transform- 5 ers comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially engageable with said pair of fixed main contacts and with said intermediate fixed contacts, a pair of circular slip-ring-like terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having radially outer ends cooperating with said plurality of selector switch contacts thereof and having radially inner ends cooperatively engaging said pair of circular terminals of one of said plurality of transfer switches, a pair of operating rods extending parallel to said common axis angularly displaced 180 degrees and each projecting transversely across one of said pair of switching bridges of each of said plurality of selector switches, and means for alternately pivoting each of said pair of operating rods about said common axis in steps having a predetermined angle.
  • a switching system for tapped regulating transformers comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable into engagement with one of said pair of fixed main contacts, into engagement with said intermediate fixed contacts, and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having radially inner ends cooperatively engaging said pair of circular terminals of one of said plurality of transfer switches;
  • each of said pair of circular terminals of each of said plurality of transfer switches defines an annular groove
  • each of said plurality of selector switches includes a pair of rings of insulating material each slidably fitted into said annular groove in one ofsaid pair of circular terminals of one of said plurality of transfer switches;
  • a radial tab-like projection is integral with each of said pair of rings of each of said plurality of selector switches
  • a bearing is provided in said tab-like projection of each of said pair of rings of each of said plurality of selector switches for supporting one of said pair of shafts.
  • each of said pair of switching bridges of each of said plurality of selector switches includes a pair of outer shells bounding an internal space
  • a plurality of plate means is guided to turn about said common axis each having a tab-like projection arranged inside said internal space bounded by said pair of shells of each of said pair of switching bridges of each of said plurality of selector switches;
  • a switching system for tapped regulating transformers comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having radially outer ends cooperating with said plurality of selector switch contacts thereof and having radially inner ends cooperatively engaging said pair of circular terminals of one of said plurality of transfer switches, a pair of shafts of insulating material parallel to said common axis angularly displaced degrees each projecting transversely across one of said pair of switching bridges of each of said plurality of selector switches, a plurality of arms of insulating material pivotable about said common axis for guiding each of said pair of shafts around said common axis in parallel relation thereto, and gear means for operating said pair of shafts including a main gear rotatable about said common axis, a pair of geneva gears each mounted
  • a switching system for tapped regulating transformers comprising in combination.
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis and said pair of circular terminals of each of said plurality of transfer switches each defining a pair of grooves arranged coaxially around said common axis;
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of insulating rings each having a tab-like radial extension and each having a radially inner edge guided in one of said pair of grooves in one of said pair of circular terminals of one of said plurality of transfer switches, each of said plurality of selector switches further including a pair of switching bridges having radially outer ends cooperating with said plurality of selector switch contacts thereof and having radially inner ends each cooperatively engaging one of said pair of circular terminals of one of said plurality of transfer switches, a pair of shafts extending parallel to said common axis angularly displaced 180 degrees and each projecting transversely across said tab-like projection of one of said pair of insulating rings of each of said plurality of selector switches and
  • a switching system for tapped regulating transformers comprising in combination:
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a common plane in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having ends adapted to cooperatively engage said fixed selector switch contacts of one of said plurality of selector switches and to cooperatively engage said pair of circular terminals of one of said plurality of transfer switches, each of said pair of switching bridges including a pair of complementary shells bounding an internal space and spring means inside said space biasing said pair of shells toward each other, a plurality of pairs of substantially annular plates of insulating material each engaging with a radially inner edge thereof said annular groove in one of said pair of circular terminals of one of said plurality of transfer switches and each having a tab-like projection extending into said internal space bounded by said pair of complementary shells of each of said pair of switching bridges of each of
  • a switching system for tapped regulating transformers comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of fixed selector switch contacts arranged in a circular pattern around said common axis, a substantially cylindrical cage formed of spaced insulating rods and arranged in coaxial relation to said pair of circular terminals of said plurality of transfer switches supporting said fixed se 7 lector switch contacts of said plurality of selector switches, each of said plurality of selector switches further including a pair of switching bridges, a pair of shafts for operating said pair of switching bridges of each of said plurality of selector switches, said pair of shafts extending parallel to said common axis and being arranged in a common plane with said common axis and each of said pair of shafts projecting transversely across one of said pair of switching bridges of each of said plurality of selector switches, a pair of geneva gears each fixedly mounted on one of said pair of shafts, a main gear rotatable about said common
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of tapped transformer windings including a plurality of even numbered taps and a plu rality of odd numbered taps arranged between even numbered taps;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered fixed selector switch contacts arranged between even numbered selector switch contacts, said plurality of even numbered selector switch conacts of each of said plurality of selector switches being arranged in a first common plane, said plurality of odd numbered contacts of each of said plurality of selector switches being arranged in a second common plane, each of said plurality of even numbered taps of each of said plurality of windings being conductively connected to one of said even numbered fixed selector switch contacts of one of said plurality of selector switches, and each of said plurality of odd numbered taps of each of said plurality of windings being conductively connected to one of said odd numbered fixed selector switch contacts of one of said plurality of selector switches, each of said plurality of selector switches further including a pair of switching bridges
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of windings including a plurality of even numbered taps and a plurality of odd numbered taps arranged between even numbered taps;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered selector switch contacts arranged between even numbered selector switch contacts, each of said plurality of even numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of even numbered taps of said plurality of windings, and each of said plurality of odd numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of odd numbered taps of one of said plurality of windings, said selector switch contacts of each of said plurality of selector switches being arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges, a pair of shafts for operating said pair of switching bridges of each of said plurality of selector switches, said pair of shaft
  • a tapped regulating transformer comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main cont-acts into engagement 7 with said intermediate fixed contacts and into engagement with the other of said pair of fixed main 15 Y contacts, a pair of circular terminals surroundin each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered selector switch contacts arranged between even numbered selector switch contacts, each of said plurality of even numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of even numbered taps of one of said plurality of windings and each of said plurality of odd numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of odd numbered taps of one of said plurality of windings, said selector switch contacts of each of said plurality of selector switches being arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having ends adapted to cooperatively engage fixed selector switch contacts of one of said plurality of selector switches and to cooperatively engage one
  • a tapped polyphase regulating transformer comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals 1% of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered selector switch contacts arranged between even numbered selector switch contacts, each of said plurality of even numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of even numbered taps of one of said plurality of windings, and each of said plurality of odd numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of odd numbered taps of one of said plurality of windings, said selector switch contacts of each of said plurality of selector switches being arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having ends adapted to cooperatively engage fixed selector switch contacts of one of said plurality of selector switches and to cooperatively engage
  • a tapped polyphase regulating transformer comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from initial engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis, and each of said pair of circular terminals of each of said plurality of transfer switches defining an annular groove;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered fixed selector switch contacts arranged between even numbered selector switch contacts, each of said plurality of even numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of even numbered taps of one of said plurality of windings, and each of said plurality of odd numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said odd numbered taps of one of said plurality of windings, said selector switch contacts of each of said plurality of selector switches being arranged in a circular pattern around said common axis, each of said plurality of selector switches further including a pair of switching bridges having ends adapted to cooperatively engage fixed selector switch contacts of one of said plurality of selector switches and to cooperatively engage said pair
  • a tapped polyphase regulating transformer comprising in combination:
  • a plurality of stacked transfer switches each including a pair of fixed main contacts, fixed intermediate contacts and movable contact means sequentially movable from engagement with one of said pair of fixed main contacts into engagement with said intermediate fixed contacts and into engagement with the other of said pair of fixed main contacts, a pair of circular terminals surrounding each of said plurality of transfer switches, each of said pair of circular terminals of each of said plurality of transfer switches being conductively connected to one of said pair of fixed main contacts of one of said plurality of transfer switches, said pair of circular terminals of each of said plurality of transfer switches being arranged coaxially around a common axis;
  • each of said plurality of selector switches including a plurality of even numbered fixed selector switch contacts and a plurality of odd numbered selector switch contacts arranged between even numbered selector switch contacts, each of said plurality of even numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of even numbered taps of one of said plurality of windings, and each of said plurality of odd numbered selector switch contacts of each of said plurality of selector switches being conductively connected to one of said plurality of odd numbered taps of one of said plurality of windings, a substantially cylindrical cage formed of spaced insulating rods arranged in coaxial relation to said pair of circular terminals of said plurality of transfer switches supporting said fixed selector switch contacts of said plurality of selector switches, each of said plurality of selector switches further including a pair of switching bridges, a pair of shafts at
  • a switching mechanism for tapped regulating transformers comprising in combination:
  • a transfer switch and switch-over resistor means arranged inside said housing, said transfer switch including a pair of fixed main contacts and fixed auxiliary contacts arranged in a'circular pattern, each of said pair of fixed main contacts being conductively connected with one of said pair of slipring-like fixed contacts and said fixed auxiliary contacts being arranged between said pair of fixed main contacts, each of said switch-over resistor means having one end conductively connected to one of said fixed auxiliary contacts and an end opposite to said one end conductively connected to one of said slipring-like fixed contacts, and said transfer switch further including movable contact means cooperating in a predetermined sequence with said pair of fixed main contacts and said fixed auxiliary contacts;
  • a selector switch arranged at substantially the same level as said transfer switch, said selector switch including a first group of circularly arranged spaced fixed contacts positioned at substantially the same level as one of said pair of slip-ring-like fixed contacts and said selector switch including a second group of circularly arranged spaced fixed contacts positioned at substantially the same level as the other of said pair of slip-ring-like fixed contacts, and said selector switch further including a pair of radially extending contact bridges angularly displaced 180 degrees relative to each other pivotable about the axis of said housing, each of said pair of contact bridges having a radially inner end engaging one of said pair of slip-ring-like fixed contacts, one of said pair of contact bridges having a radially outer end selectively engaging said fixed contacts of said first group of contacts and the other of said pair of contact bridges having a radially outer end selectively engaging said fixed contacts of said second group of contacts; and
  • operating means for said selector switch including a gear mechanism arranged above said first group of fixed contacts and above said second group of fixed contacts thereof, said operating means further including a pair of operating rods arranged parallel to the axis of said housing and angularly displaced degrees relative to each other, each of said pair of rods having an upper end driven by said gear mechanism around said housing and each of said pair of rods having a lower portion operatively connected to one of said pair of contact bridges.

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  • Electronic Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US396243A 1963-09-18 1964-09-14 Switching mechanism for tapped regulating transformers Expired - Lifetime US3366750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM58232A DE1276191B (de) 1963-09-18 1963-09-18 Stufenschalteinrichtung fuer Regeltransformatoren

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US3366750A true US3366750A (en) 1968-01-30

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US396243A Expired - Lifetime US3366750A (en) 1963-09-18 1964-09-14 Switching mechanism for tapped regulating transformers

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US (1) US3366750A (enrdf_load_stackoverflow)
AT (1) AT243936B (enrdf_load_stackoverflow)
BE (1) BE653248A (enrdf_load_stackoverflow)
CH (1) CH413099A (enrdf_load_stackoverflow)
DE (1) DE1276191B (enrdf_load_stackoverflow)
FR (1) FR1405009A (enrdf_load_stackoverflow)
GB (1) GB1051945A (enrdf_load_stackoverflow)
NL (2) NL6410560A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590175A (en) * 1968-09-14 1971-06-29 Reinhausen Maschf Scheubeck Composite selector switch and reversing switch for tap-changing regulating transformers
US3643154A (en) * 1969-10-16 1972-02-15 Smit Nijmegen Electrotec Composite polyphase on-load tap-changers for regulating polyphase transformers and polyphase transformers provided with such tap-changers
US4810799A (en) * 1983-07-16 1989-03-07 Basf Aktiengesellschaft Preparation of N-(3,5-dichlorophenyl)oxazolidine-2,4-diones
US4939319A (en) * 1988-08-12 1990-07-03 Maschinenfabrik Reinhausen Gmbh Step selector for a stepped transformer
WO2010122422A1 (en) * 2009-04-20 2010-10-28 Abb Technology Ltd Tap charger

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805213C2 (de) * 1978-02-08 1982-04-29 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Ein- oder mehrphasiger Stufenwähler für Stufenschalter von Stufentransformatoren
DE3016196C2 (de) * 1980-04-26 1983-10-20 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Kontaktbrückenanordnung für Stufenwähler von Stufentransformatoren
DE3827385A1 (de) * 1988-08-12 1990-02-15 Reinhausen Maschf Scheubeck Zylindrischer stufenwaehler mit durch einen tragarm aus isolierstoff gefuehrter kontaktbruecke
CN114694987B (zh) * 2022-04-12 2024-01-23 南方电网调峰调频发电有限公司 一种集约型换相开关

Citations (4)

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Publication number Priority date Publication date Assignee Title
US1914907A (en) * 1930-12-08 1933-06-20 Bbc Brown Boveri & Cie Tap changing system
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US3176089A (en) * 1961-06-22 1965-03-30 Reinhausen Maschf Scheubeck Load tap changers for transformers
US3194900A (en) * 1961-12-20 1965-07-13 Reinhausen Maschf Scheubeck Modular tap-changing selector switch for connecting selectively fixed tap contacts to a transfer switch

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Publication number Priority date Publication date Assignee Title
DE705659C (de) * 1938-03-09 1941-05-06 Bernhard Jansen Dr Ing Stufenschalteinrichtung fuer Anzapftransformatoren
DE875542C (de) * 1941-03-16 1953-06-05 Bernhard Dr-Ing Jansen Stufenschalteinrichtung fuer Anzapftransformatoren
FR1191013A (fr) * 1958-02-03 1959-10-16 Jeumont Forges Const Elec Commutateurs à vide pour transformateurs
DE1859271U (de) * 1960-10-13 1962-10-04 Licentia Petent Verwaltungs G Stufeneinstellgeraet fuer leistungstransformatoren.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1914907A (en) * 1930-12-08 1933-06-20 Bbc Brown Boveri & Cie Tap changing system
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US3176089A (en) * 1961-06-22 1965-03-30 Reinhausen Maschf Scheubeck Load tap changers for transformers
US3194900A (en) * 1961-12-20 1965-07-13 Reinhausen Maschf Scheubeck Modular tap-changing selector switch for connecting selectively fixed tap contacts to a transfer switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590175A (en) * 1968-09-14 1971-06-29 Reinhausen Maschf Scheubeck Composite selector switch and reversing switch for tap-changing regulating transformers
US3643154A (en) * 1969-10-16 1972-02-15 Smit Nijmegen Electrotec Composite polyphase on-load tap-changers for regulating polyphase transformers and polyphase transformers provided with such tap-changers
US4810799A (en) * 1983-07-16 1989-03-07 Basf Aktiengesellschaft Preparation of N-(3,5-dichlorophenyl)oxazolidine-2,4-diones
US4939319A (en) * 1988-08-12 1990-07-03 Maschinenfabrik Reinhausen Gmbh Step selector for a stepped transformer
WO2010122422A1 (en) * 2009-04-20 2010-10-28 Abb Technology Ltd Tap charger

Also Published As

Publication number Publication date
GB1051945A (enrdf_load_stackoverflow) 1900-01-01
FR1405009A (fr) 1965-07-02
AT243936B (de) 1965-12-10
CH413099A (de) 1966-05-15
DE1276191B (de) 1968-08-29
BE653248A (enrdf_load_stackoverflow) 1965-01-18
NL123189C (enrdf_load_stackoverflow)
NL6410560A (enrdf_load_stackoverflow) 1965-03-19

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