US3246088A - Opposite rotational sense actuator mechanism for tap changer contacts - Google Patents

Opposite rotational sense actuator mechanism for tap changer contacts Download PDF

Info

Publication number
US3246088A
US3246088A US316077A US31607763A US3246088A US 3246088 A US3246088 A US 3246088A US 316077 A US316077 A US 316077A US 31607763 A US31607763 A US 31607763A US 3246088 A US3246088 A US 3246088A
Authority
US
United States
Prior art keywords
contacts
fixed contacts
fixed
movable
arcuate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US316077A
Inventor
Maunder Jeffrey Allen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Application granted granted Critical
Publication of US3246088A publication Critical patent/US3246088A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005Tap change devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18528Rotary to intermittent unidirectional motion
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/19Gearing
    • Y10T74/19023Plural power paths to and/or from gearing
    • Y10T74/19074Single drive plural driven
    • Y10T74/19121Concentric

Definitions

  • a known arrangement for transformer on-load tap changing employs two selector switches each comprising a plurality of fixed contacts, usually arranged on a circle and a movable contact operable to engage the fixed contacts in sequence.
  • One of these two selector switches has its fixed contacts connected to odd-numbered tapping points on the transformer and the other has its fixed contacts connected to even-numbered tapping points, a high speed diverter switch being provided to direct the load current through one or the other of the selector switches depending on whether an odd-numbered or an evennumbered tapping point is in use.
  • the two selector switches are arranged to be operated, alternately, to move the movable contact from one fixed contact to the next in the sequence, so that the tapping point in use can be progressively changed, with minimum disturbance of the load circuit, by operating the selector switch not in use and then operating the diverter switch to connect this selector switch to the load and disconnect the other selector switch.
  • the two selector switches With the fixed contacts of the selector switches arranged on circles, the two selector switches are usually mounted, one above the other, on two concentric shafts, respectively coupled to the movable contacts of the two selector switches, the two shafts being arranged to be rotated alternately to operate the movable contacts each through one step at a time.
  • a selector switch suitable for on-load transformer tap changing comprises a plurality of fixed contacts arranged in two arcuate sets, preferably on a common circle, and two contra-rotatable movable contacts operable to selectively engage the fixed contacts of the respective sets, the two movable contacts being arranged to be stepped alternately, each from one fixed contact to the next, between limit positions in one of which they respectively engage the fixed contacts at adjacent ends of the respective arcs and in the other of which they respectively engage the fixed contacts at the other end of these arcs.
  • FIG. 1 represents in plan view a selector switch in accordance with the invention
  • FIG. 2 is a section taken along the line AA in FIG. 1;
  • FIG. 3 is a transformer on-load tap changing arrange ment which includes a selector switch in accordance with the invention.
  • FIG. 4 is a similar section to FIG. 2 but shows in addition a driving mechanism for the switch.
  • an insulating plate 20 carries a plurality of fixed contacts '1, 2, 3, 4 11 arranged on a circle surrounding two arcuate collector bars 21 and 22 which are also carried by the plate 20.
  • the fixed contacts designated by the odd numerals 1, 3, 5 etc. form an arcuate, substantially semicircular, set associated with collector bar 21 and selectively connectible thereto by movable contact 23 carried by an arm 24 radially disposed with respect to the fixed contact circle.
  • Another radial arm 25 carries a movable contact 26 arranged to selectively connect to the collector bar 22 the arcuate, substantially semi-circular, set of fixed contacts formed by those designated by the even numerals 2, 4, 6 etc.
  • the plate 20 may conveniently be moulded from a suitable synthetic resin which can withstand high voltages and may have the fixed contacts 1, 2 11 and the collector bars 21 and 22 moulded therein.
  • the arms 24 and 25 are contra-rotatable by concentric shafts 27 and 28 which are coupled to a suitable driving mechanism (such for instance as that shown in FIG. 4) arranged to step the arms 24 and 25 alternately and in opposite directions round the circle to engage the fixed contacts of their associated sets in sequence.
  • the shaft 28 can be rotated to step the arm 25 to a position in which its contact 26 engages fixed contact 6, then shaft 27 can be rotated to step the arm 24 to a position in which its contact 23 engages fixed contact 7, and so on.
  • the two shafts 27 and 28 can be rotated alternately in this manner until the arms 24 and 25 have been stepped to the limit position in which their contacts 23 and 26 engage fixed contacts 11 and 10 respectively. Alternate rotation of the two shafts 27 and 28 in the reverse direction can be effected until the arms 24 and 25 reach the limit positions in which their contacts engage the fixed contacts 1 and 2.
  • a shaft 30- is rotatably mounted on one end of shaft 27 of the switch and intermittently transmits rotary motion to it through a 2:1 reduction gear train 31, 32, and a Geneva mechanism comprising a star wheel sector 33 and a cam 34.
  • the shaft 30 also intermittently transmits rotary motion to the shaft 28 through a 2:1 reduction gear train 36, 37 with an interposed direction reversing idle wheel 38, and a Geneva mechanism comprising star wheel sector 39 and a cam 40.
  • a bevel gear 41, 42 couples a driving shaft 43 to the shaft 30. In operation, the driving shaft 43 rotates the shaft 30, causing the gear wheels 32 and 37 to rotate in opposite directions.
  • the cams 34 and 40 are driven by the latter gear wheels and are so phased (that is, they have such angular positions relatively to each other) that they engage a tooth of their respective star wheels sectors 33 and 39 alternately, so that these sectors and with them the shafts 27 and 28 move in opposite directions through a limited angle, alternately.
  • gear trains having a 2:1 reduction ratio as mentioned each complete revolution of the shaft moves one of the shafts 27 and 28 through a small angle so that its associated movable contact steps from one fixed contact to the next in the sequence.
  • a transformer winding W has a plurality of tapping. points t t t connected to the two sets of fixed contacts of a selector switch in accordance with the invention as shown.
  • the collector bars 21 and 22 of the switch are connected to contacts of a high speed diverter switch Dv arrangedto selectively con.- nect the collector bars to a load terminal L.
  • Dv high speed diverter switch
  • the arms 24 and 25 being in the positions illustrated in FIG. 1, a change to tapping point t is.
  • the plate 20 which as shown can be circular so as to simplify the construction of its mould, can be suitably dished to provide strength.
  • The, circular form for the plate 26 is also advantageous for single-phase high voltage taps changers in that the plate can be mounted concentrically at the bottom of the porcelain insulator on the top of which the diverter switch is usually mounted.
  • the fixed contacts, which all lie in the same plane are readily accessible. and enable connections to the tappingv points to be etfected easily.
  • a selector switch comprising a support structure, a plurality of electrically isolated fixed contacts arranged on the support structure in two arcuate sets having their arcs centered on a common axis and subtending respective angles each of less than. 180 degrees on opposite. sides of said axis, first and second movable contacts cooperating respectively with said two sets of fixed contacts and.
  • a selector switch as. claimed in claim 1 including two concentric shafts respectively carrying s'aid movable contacts, a common rotatable operating member, and means drivingly coupling said concentric shafts to said common member; said means'inc'luding direction reversing gearing in respect of one of said shafts, and respective intermittent drive mechanismsfor both said shafts, said mechanisms being phased to act alternately whereby to step said shafts and therefore-the movable contacts alternately'and in opposite rotational senses.
  • a selector switch as claimed in claim 1 in electrical combination with a. tapped transformer having successive odd and even numbered tapping points, said transformer having connections. electrically connecting-its successive odd-numbered tapping points to the successive contacts in one of said sets of' fixed contacts of. the switch, and con-- References Cited by the Examiner UNITED STATES PATENTS 1,764,319 6/1930 Kurda 323-435 1,863,392 6/1932 Brand etal 200-7 1,867,147 7/1932 Haller 2004 2,231,627 2/1941 Jansen.

Description

April 12, 1966 J. A. MAUNDER 3,246,088
OPPOSITE ROTATIONAL SENSE ACTUATOR MECHANISM FOR TAP CHANGER CONTACTS Filed Oct. 14, 196-3 2 Sheets-Sheet l '//////A;// TI7//// '""131E511".......
ldvnv'rolL JEFFREY ALLEN Mfi'U/VDEK B =MM+ W n1 April 12, 1966 MAUNDER 3,246,088
OPPOSITE ROTATIONAL SENSE ACTUATOR MECHANISM FOR TAP CHANGER CONTACTS Filed 00 14, 1963 2 Sheets-Sheet 2 United States Patent OPPOSITE ROTATIONAL SENSE ACTUATOR MECHANISM FOR TAP CHANGER CONTACTS Jelfrey Allen Maunder, Manchester, England, assignor to Associated Electrical Industries Limited, London, Eng- 3 land, a company of Great Britain Filed Oct. 14, 1963, Ser. No. 316,077 Claims priority, application Great Britain, Oct. 19, 1962, 39,699/ 62 Claims. (Cl. 200-11) This invention relates to selector switches suitable for use for transformer on-load tap changing.
A known arrangement for transformer on-load tap changing employs two selector switches each comprising a plurality of fixed contacts, usually arranged on a circle and a movable contact operable to engage the fixed contacts in sequence. One of these two selector switches has its fixed contacts connected to odd-numbered tapping points on the transformer and the other has its fixed contacts connected to even-numbered tapping points, a high speed diverter switch being provided to direct the load current through one or the other of the selector switches depending on whether an odd-numbered or an evennumbered tapping point is in use. The two selector switches are arranged to be operated, alternately, to move the movable contact from one fixed contact to the next in the sequence, so that the tapping point in use can be progressively changed, with minimum disturbance of the load circuit, by operating the selector switch not in use and then operating the diverter switch to connect this selector switch to the load and disconnect the other selector switch. With the fixed contacts of the selector switches arranged on circles, the two selector switches are usually mounted, one above the other, on two concentric shafts, respectively coupled to the movable contacts of the two selector switches, the two shafts being arranged to be rotated alternately to operate the movable contacts each through one step at a time.
It is a disadvantage of this known tap changing arrangement that the two fixed contacts which are first and last in the circular sequence of engagement by the moving contact of a switch are connected to tapping points having most of the tapped voltage between them. Consequently these two fixed contacts, which are next to each other in the circle of contacts, must be spaced apart sutficiently to withstand this voltage and any voltage surges which may occur.
It is an object of the invention to provide a selector switch which can replace both of the selector switches of the known arrangement and also does not suffer from the above disadvantage.
According to the invention a selector switch suitable for on-load transformer tap changing comprises a plurality of fixed contacts arranged in two arcuate sets, preferably on a common circle, and two contra-rotatable movable contacts operable to selectively engage the fixed contacts of the respective sets, the two movable contacts being arranged to be stepped alternately, each from one fixed contact to the next, between limit positions in one of which they respectively engage the fixed contacts at adjacent ends of the respective arcs and in the other of which they respectively engage the fixed contacts at the other end of these arcs.
By reason of this arrangement, if the fixed contacts of one set are successively connected to the odd-numbered tapping points, and those in the other set to even-numbered tapping points, the end fixed contacts of the two arcs, at each end, will be connected to adjacent tapping points and will consequently have to be spaced only to withstand the voltage between these tapping points.
In order that the invention may be more fully understood an embodiment thereof will now be described, by way of example, with reference to the accompanying drawings in which:
FIG. 1 represents in plan view a selector switch in accordance with the invention;
FIG. 2 is a section taken along the line AA in FIG. 1;
FIG. 3 is a transformer on-load tap changing arrange ment which includes a selector switch in accordance with the invention; and
FIG. 4 is a similar section to FIG. 2 but shows in addition a driving mechanism for the switch.
Referring in the first instance to FIGS. 1 and 2, an insulating plate 20 carries a plurality of fixed contacts '1, 2, 3, 4 11 arranged on a circle surrounding two arcuate collector bars 21 and 22 which are also carried by the plate 20. The fixed contacts designated by the odd numerals 1, 3, 5 etc. form an arcuate, substantially semicircular, set associated with collector bar 21 and selectively connectible thereto by movable contact 23 carried by an arm 24 radially disposed with respect to the fixed contact circle. Another radial arm 25 carries a movable contact 26 arranged to selectively connect to the collector bar 22 the arcuate, substantially semi-circular, set of fixed contacts formed by those designated by the even numerals 2, 4, 6 etc. The plate 20 may conveniently be moulded from a suitable synthetic resin which can withstand high voltages and may have the fixed contacts 1, 2 11 and the collector bars 21 and 22 moulded therein. The arms 24 and 25 are contra-rotatable by concentric shafts 27 and 28 which are coupled to a suitable driving mechanism (such for instance as that shown in FIG. 4) arranged to step the arms 24 and 25 alternately and in opposite directions round the circle to engage the fixed contacts of their associated sets in sequence. Starting with the arms 24 and 25 in the positions shown, that is, with movable contacts 26 and 23 engaging fixed contacts 4 and 5 respectively the shaft 28 can be rotated to step the arm 25 to a position in which its contact 26 engages fixed contact 6, then shaft 27 can be rotated to step the arm 24 to a position in which its contact 23 engages fixed contact 7, and so on. The two shafts 27 and 28 can be rotated alternately in this manner until the arms 24 and 25 have been stepped to the limit position in which their contacts 23 and 26 engage fixed contacts 11 and 10 respectively. Alternate rotation of the two shafts 27 and 28 in the reverse direction can be effected until the arms 24 and 25 reach the limit positions in which their contacts engage the fixed contacts 1 and 2.
In the form of driving mechanism shown in FIG. 4, a shaft 30- is rotatably mounted on one end of shaft 27 of the switch and intermittently transmits rotary motion to it through a 2:1 reduction gear train 31, 32, and a Geneva mechanism comprising a star wheel sector 33 and a cam 34. The shaft 30 also intermittently transmits rotary motion to the shaft 28 through a 2:1 reduction gear train 36, 37 with an interposed direction reversing idle wheel 38, and a Geneva mechanism comprising star wheel sector 39 and a cam 40. A bevel gear 41, 42 couples a driving shaft 43 to the shaft 30. In operation, the driving shaft 43 rotates the shaft 30, causing the gear wheels 32 and 37 to rotate in opposite directions. The cams 34 and 40 are driven by the latter gear wheels and are so phased (that is, they have such angular positions relatively to each other) that they engage a tooth of their respective star wheels sectors 33 and 39 alternately, so that these sectors and with them the shafts 27 and 28 move in opposite directions through a limited angle, alternately. With gear trains having a 2:1 reduction ratio as mentioned each complete revolution of the shaft moves one of the shafts 27 and 28 through a small angle so that its associated movable contact steps from one fixed contact to the next in the sequence.
Referring now to FIG. 3, a transformer winding W has a plurality of tapping. points t t t connected to the two sets of fixed contacts of a selector switch in accordance with the invention as shown. The collector bars 21 and 22 of the switch are connected to contacts of a high speed diverter switch Dv arrangedto selectively con.- nect the collector bars to a load terminal L. When connected in this manner the, voltage between any two adjacent fixed contacts is. only that between two consecutive tapping points. With tapping points t in use, the arms 24 and 25 being in the positions illustrated in FIG. 1, a change to tapping point t is. eifected by operating the selector switch to the position in which contact 26 engages fixed contact 6 and then operating the'diverter switch D to connector bar 22 to the load terminals L. A subsequent change to tapping point t can. be effected by operating the selector switch. so that contact 23 engages fixed contact 7 and then returning the diverter switch to its original position to connect bar 21 to the load terminal L. y The plate 20, which as shown can be circular so as to simplify the construction of its mould, can be suitably dished to provide strength. The, circular form for the plate 26 is also advantageous for single-phase high voltage taps changers in that the plate can be mounted concentrically at the bottom of the porcelain insulator on the top of which the diverter switch is usually mounted. The fixed contacts, which all lie in the same plane are readily accessible. and enable connections to the tappingv points to be etfected easily.
What I claim is:
1. A selector switch comprising a support structure, a plurality of electrically isolated fixed contacts arranged on the support structure in two arcuate sets having their arcs centered on a common axis and subtending respective angles each of less than. 180 degrees on opposite. sides of said axis, first and second movable contacts cooperating respectively with said two sets of fixed contacts and.
mounted on said support structure for rotation about said axis, each over the fixed contacts of the appertaining set, actuating means coupled to the movable contacts for stepping them alternately and in opposite rotational sensesof the respective arcuate sets, and connection'means for establishing continuous electrical connection with said movable contacts throughout their movement between said limit positions.
2. A- selector switch as claimed in claim 1, in which the two sets of fixed: contacts are arranged on said: support structure at a common radialdistance from said axis and in the same; plane.
3. A selector switch as. claimed in claim 1 including two concentric shafts respectively carrying s'aid movable contacts, a common rotatable operating member, and means drivingly coupling said concentric shafts to said common member; said means'inc'luding direction reversing gearing in respect of one of said shafts, and respective intermittent drive mechanismsfor both said shafts, said mechanisms being phased to act alternately whereby to step said shafts and therefore-the movable contacts alternately'and in opposite rotational senses.
4. A selector switch as claimed in claim 1 in electrical combination with a. tapped transformer having successive odd and even numbered tapping points, said transformer having connections. electrically connecting-its successive odd-numbered tapping points to the successive contacts in one of said sets of' fixed contacts of. the switch, and con-- References Cited by the Examiner UNITED STATES PATENTS 1,764,319 6/1930 Kurda 323-435 1,863,392 6/1932 Brand etal 200-7 1,867,147 7/1932 Haller 2004 2,231,627 2/1941 Jansen.
2,363,886 11/1944 McKenney' 200-5 2,480,589 8/1949 McKenney 32343.5 2,560,002 7/ 1 SeaIey.
2,785,242 3/1957 White 200-18 3,155,782 11/1964 Wilson u 200'-11 KATHLEEN H. CLAFFY, Primary Examiner-

Claims (1)

1. A SELECTOR SWITCH COMPRISING A SUPPORT STRUCTURE, A PLURALITY OF ELECTRICALLY ISOLATED FIXED CONTACTS ARRANGED ON THE SUPPORT STRUCTURE IN TWO ARCUATE SETS HAVING THEIR ARCS CENTERED ON A COMMON AXIS AND SUBTENDING RESPECTIVE ANGLES EACH OF LESS THAN 180 DEGREES ON OPPOSITE SIDES OF SAID AXIS, FIRT AND SECOND MOVABLE CONTACTS COOPERATING RESPECTIVELY WITH SAID TWO SETS OF FIXED CONTACTS AND MOUNTED ON SAID SUPPORT STRUCTURE FOR ROTATION ABOUT SAID AXIS, EACH OVER THE FIXED CONTACTS OF THE APPERTAINING SET, ACTUATING MEANS COUPLED TO THE MOVABLE CONTACTS FOR STEPPING THEM ALTERNATELY AND IN OPPOSITE ROTATIONAL SENSES BETWEEN LIMIT POSITIONS IN ONE OF WHICH THE FIRST MOVABLE CONTACT ENGAGES THE FIXED CONTACT AT ONE END OF THE APPERTAINING ARCUATE SET WHILE THE SECOND MOVABLE CONTACT ENGAGES THE FIXED CONTACT AT THE NEAR END OF THE OTHER ARCUATE SET, AND IN THE OTHER OF WHICH THE MOVABLE CONTACTS RESPECTIVELY ENGAGE THE FIXED CONTACTS AT THE OTHER ENDS OF THE RESPECTIVE ARCUATE SETS, AND CONNECTION MEANS FOR ESTABLISHING CONTINUOUS ELECTRICAL CONNECTION WITH SAID MOVABLE CONTACTS THROUGHOUT THEIR MOVEMENT BETWEEN SAID LIMIT POSITIONS.
US316077A 1962-10-19 1963-10-14 Opposite rotational sense actuator mechanism for tap changer contacts Expired - Lifetime US3246088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39699/62A GB1044520A (en) 1962-10-19 1962-10-19 Improvements relating to electric selector switches

Publications (1)

Publication Number Publication Date
US3246088A true US3246088A (en) 1966-04-12

Family

ID=10410990

Family Applications (1)

Application Number Title Priority Date Filing Date
US316077A Expired - Lifetime US3246088A (en) 1962-10-19 1963-10-14 Opposite rotational sense actuator mechanism for tap changer contacts

Country Status (8)

Country Link
US (1) US3246088A (en)
BE (1) BE638899A (en)
CH (1) CH427956A (en)
DE (1) DE1266389B (en)
DK (1) DK109396C (en)
ES (1) ES292579A1 (en)
GB (1) GB1044520A (en)
NL (1) NL299490A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484567A (en) * 1967-12-19 1969-12-16 John Johnson Switch
US3902030A (en) * 1973-08-31 1975-08-26 Laurentiv Popa Diverter switch for on-load changers
US4103119A (en) * 1976-10-12 1978-07-25 P. R. Mallory & Co. Inc. Timing mechanism having independently operated plural cam assemblies
US4595806A (en) * 1983-12-08 1986-06-17 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE202011001444U1 (en) * 2011-01-13 2012-04-17 Maschinenfabrik Reinhausen Gmbh hand drive

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764319A (en) * 1927-04-08 1930-06-17 Westinghouse Electric & Mfg Co Voltage-control system
US1863392A (en) * 1931-10-08 1932-06-14 Gen Electric Electric switch
US1867147A (en) * 1930-06-10 1932-07-12 Bbc Brown Boveri & Cie Tap changing switch and system
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US2363886A (en) * 1942-07-15 1944-11-28 Gen Electric Electric switching mechanism
US2480589A (en) * 1946-06-07 1949-08-30 Gen Electric Electromechanical tap changing mechanism
US2560002A (en) * 1945-07-27 1951-07-10 Allis Chalmers Mfg Co Voltage regulating control and apparatus
US2785242A (en) * 1955-06-13 1957-03-12 Westinghouse Electric Corp Tap-changers
US3155782A (en) * 1959-05-01 1964-11-03 Mc Graw Edison Co Switch actuating mechanism for controlled speed tap changer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE14682C (en) * CH. PATSCH in Wien Soldering device
DE878392C (en) * 1944-09-17 1953-06-01 Siemens Ag Maltese cross gear with unequal switching steps, especially for regulations
DE1849286U (en) * 1961-08-22 1962-04-05 Siemens Ag ROTARY SWITCH.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764319A (en) * 1927-04-08 1930-06-17 Westinghouse Electric & Mfg Co Voltage-control system
US1867147A (en) * 1930-06-10 1932-07-12 Bbc Brown Boveri & Cie Tap changing switch and system
US1863392A (en) * 1931-10-08 1932-06-14 Gen Electric Electric switch
US2231627A (en) * 1934-04-20 1941-02-11 Jansen Bernhard Step switch device for regulating transformers
US2363886A (en) * 1942-07-15 1944-11-28 Gen Electric Electric switching mechanism
US2560002A (en) * 1945-07-27 1951-07-10 Allis Chalmers Mfg Co Voltage regulating control and apparatus
US2480589A (en) * 1946-06-07 1949-08-30 Gen Electric Electromechanical tap changing mechanism
US2785242A (en) * 1955-06-13 1957-03-12 Westinghouse Electric Corp Tap-changers
US3155782A (en) * 1959-05-01 1964-11-03 Mc Graw Edison Co Switch actuating mechanism for controlled speed tap changer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484567A (en) * 1967-12-19 1969-12-16 John Johnson Switch
US3902030A (en) * 1973-08-31 1975-08-26 Laurentiv Popa Diverter switch for on-load changers
US4103119A (en) * 1976-10-12 1978-07-25 P. R. Mallory & Co. Inc. Timing mechanism having independently operated plural cam assemblies
US4595806A (en) * 1983-12-08 1986-06-17 Mitsubishi Denki Kabushiki Kaisha On-load tap changer
DE202011001444U1 (en) * 2011-01-13 2012-04-17 Maschinenfabrik Reinhausen Gmbh hand drive

Also Published As

Publication number Publication date
NL299490A (en)
BE638899A (en)
DK109396C (en) 1968-04-22
GB1044520A (en) 1966-10-05
CH427956A (en) 1967-01-15
ES292579A1 (en) 1964-01-01
DE1266389B (en) 1968-04-18

Similar Documents

Publication Publication Date Title
US3590175A (en) Composite selector switch and reversing switch for tap-changing regulating transformers
US4207445A (en) On-load tap changer switch assembly
US3581188A (en) Switching device for on-load tap changers of regulating transformers
US3066208A (en) Tap changing apparatus
US3764891A (en) Tap changing apparatus with prevention of floating tapped winding
US2231627A (en) Step switch device for regulating transformers
US3176089A (en) Load tap changers for transformers
US2785242A (en) Tap-changers
US1985927A (en) Step-switch arrangement for tapping transformers
US3246088A (en) Opposite rotational sense actuator mechanism for tap changer contacts
US2833873A (en) Multi-pole tap switch construction for changing transformer taps under load
US4595806A (en) On-load tap changer
US1863392A (en) Electric switch
US3643154A (en) Composite polyphase on-load tap-changers for regulating polyphase transformers and polyphase transformers provided with such tap-changers
US3250864A (en) Regulating transformers having a large number of taps
US3614597A (en) Tapchangers for regulating transformers
WO2018148811A1 (en) Selector with preselector for on-load tap changer
US3250865A (en) Transfer switch for tapped regulating transformers with radial guide and linkage structure
HU182971B (en) Vacuum space ratio switch for tapped transformars
US2484576A (en) Interphase winding and ratio adjuster switching arrangement for polyphase transformers
US3366750A (en) Switching mechanism for tapped regulating transformers
US3445611A (en) Selector switch for load tap-changers of regulating transformers
US3366763A (en) Reversing switch for tap-changing regulating transformers
US2435438A (en) Electric switch
US3194900A (en) Modular tap-changing selector switch for connecting selectively fixed tap contacts to a transfer switch