US1931869A - Step switcher for regulating transformers - Google Patents

Step switcher for regulating transformers Download PDF

Info

Publication number
US1931869A
US1931869A US508447A US50844731A US1931869A US 1931869 A US1931869 A US 1931869A US 508447 A US508447 A US 508447A US 50844731 A US50844731 A US 50844731A US 1931869 A US1931869 A US 1931869A
Authority
US
United States
Prior art keywords
switch
tap
taps
carriage
crank
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
US508447A
Other languages
English (en)
Inventor
Jansen Bernhard
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority claimed from GB220531A external-priority patent/GB371414A/en
Application granted granted Critical
Publication of US1931869A publication Critical patent/US1931869A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a switch regulation method by means of which the taps of a transformer can be changed while in normal uninterrupted use.
  • the transformer taps succeeding one another are arranged on a circular contact path and a double-pole switch which can be displaced by a crank is moved from one tap to the next one.
  • the double-pole switch by means of which the changing-over from the tap in use to the tap above orbelow is effected isbesides possessing permanent contacts-generally provided with pre-contacts and bridge-resistances. These establish the connection with the next tap before the preceding one is left.
  • Fig. 1 is a front elevation of a step-switch arrangement for eight taps, with a tap cut in for 5 normal operation;
  • Fig. 2 is a plan view of the device of Fig. 1 in the position illustrated in Fig. 1;
  • Fig. 3 is a front elevation of the device of Fig.
  • Fig. 4 shows in plan the position of the device as in Fig. 3;
  • Fig.5 shows the device of Fig. 1 in front elevation with a different tap cut in
  • Fig. 6 illustrates in plan the position of the device as in Fig. 5;
  • Fig. 'I discloses in front elevation a device similar to that of the foregoing figures but embracing mechanism for effecting a very rapid shifting of the switch from one tap to another;
  • Fig. 8 is a detail view of said mechanism
  • Fig. 9 illustrates in front elevation a modification of the invention showing a tap cut in for normal operation
  • Fig. 10 is a plan of the device in the position of Fig. 9; p v
  • Fig. 11 discloses an elevation of the device of Fig. 9 in an intermediate position it assumes in cutting in a tap;
  • Fig. 12 is a plan view of the position of the device in Fig. 11; I v
  • Fig. 13 is an elevation indicating a position of the device of the preceding figures in which two taps are simultaneously cut in;
  • Fig. 14 shows in elevation a different tap cut Fig. 15 is a plan of Fig. 14, and
  • Figs. 16 and 17 are respectively an elevation and I plan showing the device in a position in which a still different tap is cut in.
  • Figs. 1 to '1 represent a step-switch regulation for 8 taps in different working positions.
  • the positions of the device in Figs. 1, 2, 5 and 6 are two permanent positions in which the main A is connected with the transformer-tap 1 or 2, as the case may be.
  • the transformer-taps 1-8 are held together by a supporting bracket R of regular star-octag0n shape.
  • the supporting bracket itself or any other supporting construction which can take its place, is located across the potential of the main A.
  • a crank B is fastened to the driving shait H which shaft passes through the central axis H of said bracket R. Said crank serves to eifect movement of the carriage C to which the double-pole switch D is firmly fastoned.
  • both ends of the carriage C there are slots T by means of which the carriage canengage the cylindrical holders N of the taps and thus guide itself.
  • the carrtage C therefore describes a shifting movement in the direction of its own longitudinal axis combined with a swinging movement first around the time the crank B is then in its greatest stretching position so that,with the aid of the double-pole switch D, it can exercise a great contact pressure upon the tap cut in.
  • the double-pole switch D has the two-fold function of establishing in the working positions illustrated in Figs. 1, 2 and and 8 respectively a firm connection between the tops 1 and. '2 respectively and the main A, by means of the contacts El and E2 respectively, and of maintaining the connection in the middle or switch-over position of Figs. 3 and 4, after the main contacts E1 and E: have been disconnected from the taps. by way of the resistances G1 and G2, aided by the pre-contacts F1 and Fr.
  • a trip N: for the latch M is pivoted on said crank V.
  • a second shaft H is positioned below shaft 3 and has at its upper end a fitting W provided with three spaced arms Ni, ii: and Ne.
  • the arm N4 has a depending pin N5 acured thereto, said pin being connected by means of a spring J with the depending pin V' a the crank V.
  • the other arms N1 and Nrare provided with upwardly projecting teats.
  • This mechanism eifects instantaneous movement of the double-pole switch D inthe followin: manner.
  • the spring J Upon rotation of the shaft H the spring J is placed under tension but this force is ineffective to move the crank B due to the latch M.
  • the shaft H has been rotated suiliciently to bring the arms Ni or Ni. tinder the trip N3, the teat on said arm strikes the trip N3, releasing the latch M.
  • the force applied to the spring J thereupon acts to effect an instantaneous movement of the carriage C.
  • the carriage C is also swung from the radial operating position (Figs. 9 and 10) to the chord position (Figs. 11 and 12) by turning the crank B, and the switch D moves with it, but carriage C remains stationary in the chord position while the switch makes an independent movement for establishing contact with the selected tap, i. e. tap 2.
  • the switch D moves with it, but carriage C remains stationary in the chord position while the switch makes an independent movement for establishing contact with the selected tap, i. e. tap 2.
  • it is composed of two separate switches K1 and K2, equipped with main contacts E1 and E2 and precontacts F1 and F2 connected by a connector L.
  • Fig. 13 again shows the moment when the main A is connected simultaneously with both taps l and 2 by way of the precontacts F1 and F2 as well as the resistances G1 and (31; only in this form of arrangement the resistances G1 and G2 are not located on the double-pole switch but are in direct connection with each tap.
  • This construction can, however, also be arranged in such a manner that the resistances are permanently connected with the double-pole switch.
  • crank B is rotated to move the carriage C into the position illustrated in Figs. 11 and 12. Leaving the carriage in this position, the crank continues to rotate so as to extend the spring J.
  • a roller on the crank then strikes the switch arm Kz'fiexing the joint between said arm and link L and the extended spring J rocks the switch arms through the position shown in Fig. 13 to that of Figs. 14 and 15. The continued rotation of the crank then swings the carriage into the position shown in Figs. 14 and 15.
  • the uninterrupted switch-over e. g. from tap l to tap 2 is effected by leaving, after release of the main contact E1, the main A connected for an instant with tap 1 by way of the pre-contact F1 and resistance G2.
  • this path of the current is replaced by another path of current by way of the pre-contact F2 and the resistance G2 to the tap 2 for so long a time until the main contact E; can take over the direct path of current.
  • the change of the paths of current in the middle position takes place through momentary parallelcircuiting of the second and the subsequent opening of the first path of current.
  • the duration of the parallel circuiting during which a stress is placed upon the resistances G1 and G2 not only by the working current but also by the short-circuit current flowing from the lower to the higher tap, as has already been stated, should be reduced to a minimum. This is done by making the two pre-contacts F1 and F2 dependent each other in their movement by gear-sectors X and X as shown in Figs. 1 to 7 or by a coupling lever as shown in Figs. 9 et seq.
  • the pre-contacts' are equipped with springs Y which cause them to open up as widely as possible. Their opening movement is then limited by one of the two pre-contacts F1 or F2 striking against the corresponding tap l or 2.
  • step-switch regulation is arranged as a separate unit in air or oil outside the transformer. In many cases it can be built (see Fig. 11) directly on to the transformer-duct. The latter is, in that case, preferably constructed as a multiple ductthrough which all transformer taps pass to the step-switch regulation. If it is not desired to lead out all the taps the doublepole switch alone can be arranged outside and the remaining part of the step-switch can be put up inside the transformer.
  • the motor is connected with the zero-point potential and, to prevent excess voltage, is fed by means of an former taps arranged around the circumference of a circle, a movable carriage located between said taps, a double-pole switch connected to the electrical supply of the transformer and operably associated with said carriage and shifting means for moving the switch from a radial position for the normal connection of anyof said taps to the main, to change to the next desired tap, first into registry with the chord between the functioning and selected taps and then into the radial position appropriate to the selected tap.
  • a step switch device for tapping in a transformer during use comprising a plurality of trans former taps arranged around the circumference of a circle, a movable carriage located between said taps and having slotted ends for engaging said taps, a double-pole switch connected to the electrical supply of the transformer and secured to said carriage, a crank secured to said carriage and means for operating said crank to cause a shifting of said carriage whereby said switch is moved from a radial position for the normal connection of any of said taps to the main, to change to the next desired tap, first into registry with the chord between the functioning and selected taps and then into the radial position appropriate to the selected tap.
  • a step switch device for tapping in a transformer during use comprising a plurality of transformer taps arranged around the circumference of a circle, a movable carriage located between said taps and having slotted ends for engaging said taps, a double-pole switch on said carriage and connected to the source of electrical supply of the transformer, said switch having means for making direct contact with said taps, and having additional means for making momentary contact with said taps during movement of said carriage, a crank secured to said carriage and means for moving said crank to cause a shifting of said switch from a radial position for the normal connection of any of said taps to the main, to change to the next desired tap, first into registry with the chord between the functioning and selected taps and then into the radial position appro priate to the selected tap, momentary contact between the tap cut out by movement of the switch and that cut in by said movement being effected by said additional means.
  • a device as defined in claim 4 wherein the additional means for making momentary contact with the taps during movement of the carriage comprise a plurality of arms pivoted to the switch and having contacts at their upper ends, meshing gear sectors at their lower ends and spring means for expanding the arms to cause the contacts thereon to strike the taps during movement of the switch.
  • a step switch device for tapping in a transformer during use comprising a plurality of transformer taps arranged around the circumference of a circle, a movable carriage located between said taps and having slotted ends for engaging said taps, a double-pole switch connected to the source of supply of said transformer and secured to said carriage, a crank connected to said carriage, means for operating said crank '5 to cause a shifting movement of said carriage whereby said switch is moved from a radial position (or the normal connection of any or said tape to the main, to change to the next desired first into registry with the chord between the functioning and selected taps and then into the radial position appropriate to the selected tap and additional means cooperating with said crank to eflect an instantaneous movement or the carriage.
  • a step switch device for tannins in a transformer during use comprising a bracket for supporting eight transformer tape around the circumterence of a circle, a shaft journalled centrally in said bracket. a movable carriage located between said taps, said carriage having slotted ends for receiving said taps. a double-pole switch secured to said carriage and connected to the source of supply of said transiormer, a plurality of contacts on said switch for making a direct contact with said taps.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Keying Circuit Devices (AREA)
US508447A 1930-01-24 1931-01-13 Step switcher for regulating transformers Expired - Lifetime US1931869A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1931869X 1930-01-24
GB220531A GB371414A (en) 1931-01-22 1931-01-22 Improvements in switch gear for electric transformers

Publications (1)

Publication Number Publication Date
US1931869A true US1931869A (en) 1933-10-24

Family

ID=26011413

Family Applications (1)

Application Number Title Priority Date Filing Date
US508447A Expired - Lifetime US1931869A (en) 1930-01-24 1931-01-13 Step switcher for regulating transformers

Country Status (3)

Country Link
US (1) US1931869A (de)
DE (3) DE526809C (de)
FR (1) FR710503A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680790A (en) * 1951-03-07 1954-06-08 Jansen Bernhard Load changeover switch for tapped transformers using a combination of contact movements
US2691079A (en) * 1951-03-07 1954-10-05 Jansen Bernhard Load tap selector for tapped transformers with several contact circles per phase
US3138671A (en) * 1959-01-07 1964-06-23 Lepper Wilhelm On-load transformer tap changer
US4348558A (en) * 1979-01-05 1982-09-07 Asea Aktiebolag Diverter switch for an on-load transformer tap changer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260613B (de) * 1960-04-14 1968-02-08 Liebknecht Transformat Lastumschalter fuer Stufentransformatoren
DE2328426A1 (de) * 1973-06-05 1975-01-02 Reinhausen Maschf Scheubeck Lastwaehler fuer regeltransformatoren
DE102010015051B4 (de) * 2010-04-15 2012-06-14 Maschinenfabrik Reinhausen Gmbh Mechanischer Schaltkontakt

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2680790A (en) * 1951-03-07 1954-06-08 Jansen Bernhard Load changeover switch for tapped transformers using a combination of contact movements
US2691079A (en) * 1951-03-07 1954-10-05 Jansen Bernhard Load tap selector for tapped transformers with several contact circles per phase
US3138671A (en) * 1959-01-07 1964-06-23 Lepper Wilhelm On-load transformer tap changer
US4348558A (en) * 1979-01-05 1982-09-07 Asea Aktiebolag Diverter switch for an on-load transformer tap changer

Also Published As

Publication number Publication date
DE526809C (de) 1931-06-10
DE542081C (de) 1932-01-19
FR710503A (fr) 1931-08-21
DE556086C (de) 1932-08-02

Similar Documents

Publication Publication Date Title
US1931869A (en) Step switcher for regulating transformers
US2231627A (en) Step switch device for regulating transformers
US2694352A (en) Power-driven lens turret in cameras
US2138652A (en) Electric switching
US2470576A (en) Gang operated switch
NO130445B (de)
US2004792A (en) Electric switching
US1954657A (en) Reversible split phase motor
USRE17230E (en) Hottse electric
US1705774A (en) Poration
US1461072A (en) Rheostat with auxiliary contact system
US2074797A (en) Pedal-operated automatic gearchange
US2004998A (en) Transformer tap changing mechanisms
US2197771A (en) Switching means for transformers
US2141846A (en) High tension switch
DE591360C (de) Elektrische Widerstandsschweissmaschine mit als Gehaeuse ausgebildetem Sekundaerleiter
GB842412A (en) Improvements in or relating to on-load transformer tap changing systems
US2583299A (en) Electrically operated chuck or machine tool
US1334615A (en) Stabilizing apparatus for aeroplanes and the like
US1571526A (en) Electric switch
US1993083A (en) Fuse switch
PL58500B1 (de)
US1874824A (en) Automatic control equipment for load tap changers
US1291501A (en) Electric welder.
US1343232A (en) Control apparatus