US3855434A - Shorting device for generator output lines - Google Patents

Shorting device for generator output lines Download PDF

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Publication number
US3855434A
US3855434A US00369228A US36922873A US3855434A US 3855434 A US3855434 A US 3855434A US 00369228 A US00369228 A US 00369228A US 36922873 A US36922873 A US 36922873A US 3855434 A US3855434 A US 3855434A
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US
United States
Prior art keywords
contact
contacts
contact arm
arm
extending
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
US00369228A
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English (en)
Inventor
G Grunert
E Hartmann
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.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3855434A publication Critical patent/US3855434A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/002—Very heavy-current switches

Definitions

  • This invention relates to shorting devices for generators in general and more particularly to an improved shorting device which includes a vacuum switching tube with an extending contact.
  • contact arms are arranged ona carriage and mate with contacts on the bus bar when, the carriage is moved toward the bus bar.
  • lf bus bars such as this are used as generator output lines, it is necessary that prior to connecting a shorting device, all voltage be removed from the bus bars. To accomplish this, either the generator must have a reverse excitation device which, when the excitation is shut off, will cancel the residual voltage of the generator, or the generator must be stoppedif no such device is installed.
  • the shorting devices described herein are used only during maintenance, starting up, adjustment workv on the generator protection system and activities similar thereto. In some cases, the shorting connection must be established and opened several times in sequence. r
  • the present invention provides a shorting device which allows eliminating the time required in the prior art devices I having reverse excitationor in which the generator was stopped..ln addition, it eliminates the 1716- cessity and expense associated therewith of'having a power circuit breaker which is capable of both carrying a possible short circuit current on the generator output lines and also of switching a voltage of the magnitude of the residual voltage of the generator.
  • FIG. 1 is a elevation view partially in cross-section of a shorting device according to the present invention.
  • FIG. 2 is a elevation view partially in cross-section of the vacuum switching tube of the shorting device of FIG. 1.
  • I I FIGS. 3A to 3E are schematic diagrams illustrating the sequential operation of the shorting device of the present invention.
  • the contact arm 3 of the present shorting device is electrically coupled to a shorting bus bar 1 with means provided so that the contact arm 3 may move relative to the shorting bar 1 in order to make contact with a mating contact 4 electrically connected to the generator output bus bar 10.
  • the coupling of the contact arm 3 to the shorting bar 1 is made through a contact cage 2 in conventional fashion. Means not shown will be provided to move the contact arm 3m and out with respect to the mating contact 4 in well known fashion.
  • the contact arm 3 will preferably be a hollow cylindrical member and has mounted inside it a vacuum switching tube 5. Vacuum switching tube 5 has an actuating coil 7 and an extending contact 6 which extends from the end.
  • contact 11 adapted to mate with the extending contact 6. As shown and as will be explained in more detail below, contact 6 will engage contact 11 prior tothe contact arm 3 engaging mating contact 4.
  • the contact arm 3 contains a projection 8 on its upper end above the shorting bar 1. Projection 8 is arranged to contact a limit switch 9.
  • a second limit switch similarto limit switch 9 is located above the projection '8 and will be described below in-connection with FIG.
  • the contact arm 3 is arranged to move relative to the shorting bar 1, an arrangement wherein the contact arm 3 is rigidly coupled to the shorting bar 1 and means provided to move theassembly comprising the shorting bar '1; and contact arm'3 relative to the mating contact to a contact plate 13.
  • Contact plate 13 normally rests 1 directly against a second contact plate 14 which is conextending contact which will make contact with an ad-v vance contact on the bus bar prior to contact by the main contact arm, which vacuum switching tube can switch the residual current of the generator in the pres- I ence of the residual voltage so that it is no longer necessary to stop or de-excite the generator.
  • the vacuum switching tube is connected to operate in response to limit switches on the contact arm to provide the rephase can be used.
  • each of the vacuum switching tubes is connected electrically to one contact nected to the upper cover plate 16 of the vacuum switching tube 5 through a bellows 15.
  • the plate 14 is also mechanically connected through a plunger having an eye 17 which extends out from the topof the vacuum switching tube 5.
  • the eye 17 is connected to an armature which is operated by the actuating coils 7 to move the plunger (and thus the contact 14) up against the force of the springs 19 and 20 when the actuating coils7 are energized thereby opening contacts 13 and 14.
  • An electrical connection from the plunger assembly to contact arm 3 is made via a connecting line 25 shown in FIGS. 1 and 2 which, will cause the extending contact 6 to be connected to the contact arm 3 when the contacts 13 and 14 are closed.
  • FIG. 3a shows the contact arm 3 in the fully opened position.
  • the spacing between contact arm 3 and mating contact 4 is such that sufficient insulation is provided to prevent arcing even at the full generator voltage.
  • the projection 8 on the contact arm 3 operates a limit switch 21.
  • Limit switch 21 is connected in series with a second limit switch 9 and with a relay coil of relay 22.
  • relay 22 provides the power to the actuating coils 7 of FIG. 1.
  • the relay 22 is de-energized and its contact opened thereby causing the vacuum switching tube 5 contacts 13 and 14 to be closed, i.e., the springs 19 and 20 of FIG. 1 are holding the plunger down thereby causing the contacts 14 and 13 to be held together.
  • the extending contact 6 is electrically connected to the contact arm 3,and through contact arm 3 to the shorting bar 1.
  • the projection 8 will no longer hold open the switch 21 and this switch will close allowing relay 22 to operate closing its associated contacts to operate the actuating coils 7 which will thereby open the contacts 13 and 14 in the vacuum switching tube 5.
  • the extending contact 6 will then engage the advance contact 11 with the contacts 13 and 14within the vacuum switching tube 5 still open.
  • the projection 8 has still not made contact with the limit switch 9.
  • the projection 8 opens thelimit switch 9 as shown on FIG. 3d.
  • FIG. 3e shows the final position of the switching device in its fully closed position. Now that the residual voltage and current have been removed, the contact arm 3 continues on its downward path and mates with the mating contact 4 without any danger of arcing.
  • the generator bus 10 is now connected to the grounding bar 1 through mating contact 4, contact arm 3 and contact cage 2 in a manner such that it is capable of carrying the full short circuit current which may be obtained from the generator output.
  • a shorting device for shorting an output bus bar of 1 generator to a shorting bar comprising:
  • a vacuum switching tube having a set of contacts in an evacuated chamber one of which is connected to said contact arm and another connected to an extending contact, said switching tube mounted for motion along with said contact arm;
  • an advance contact electrically coupled to said mating contact and arranged to mate with said extending contact, the arrangement being such that upon moving said contact arm from an open to a closed position, said extending contact will engage said advance contact before said contact arm engages said mating contact;
  • a shorting device according to claim 1, wherein said vacuumswitching tube contacts in said'chamber are opened and closed by an actuating coil and said operating means comprise:
  • c. means responsive to actuation of said switch to operate the actuating coil, whereby as said arm moves to and from said mating contact said contacts within said chamber will be operated.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Protection Of Generators And Motors (AREA)
  • Motor Or Generator Frames (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
US00369228A 1972-06-23 1973-06-12 Shorting device for generator output lines Expired - Lifetime US3855434A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2230900A DE2230900C3 (de) 1972-06-23 1972-06-23 Kurzschließvorrichtung für Generatorableitungen

Publications (1)

Publication Number Publication Date
US3855434A true US3855434A (en) 1974-12-17

Family

ID=5848651

Family Applications (1)

Application Number Title Priority Date Filing Date
US00369228A Expired - Lifetime US3855434A (en) 1972-06-23 1973-06-12 Shorting device for generator output lines

Country Status (8)

Country Link
US (1) US3855434A (xx)
JP (1) JPS5515938B2 (xx)
AT (1) AT355660B (xx)
CH (1) CH552294A (xx)
DE (1) DE2230900C3 (xx)
FR (1) FR2189916B1 (xx)
GB (1) GB1438980A (xx)
SE (1) SE390093B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027126A (en) * 1973-12-14 1977-05-31 Siemens Aktiengesellschaft Shorting and grounding arrangement for gas-insulated bus bars
US4130850A (en) * 1977-01-12 1978-12-19 Gould Inc. High speed fault diverter switch for gas-insulated systems
CN1042469C (zh) * 1994-02-18 1999-03-10 Abb研究有限公司 开关装置
US20030178891A1 (en) * 2002-03-19 2003-09-25 Toshihisa Miyamoto Gas insulated switch
US9407083B1 (en) * 2012-04-26 2016-08-02 The Boeing Company Combined subtransient current suppression and overvoltage transient protection

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129617B (en) * 1982-09-22 1986-07-23 Scott L & Electromotors Ltd Electrical isolating switch
FR2763171B1 (fr) * 1997-05-07 1999-07-09 Gec Alsthom T & D Sa Disjoncteur avec sectionneur
FR2763422B1 (fr) * 1997-05-15 1999-07-09 Gec Alsthom T & D Sa Disjoncteur de generateur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399286A (en) * 1966-03-07 1968-08-27 Powerdyne Inc High voltage electric swtich

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400716A (en) * 1932-06-17 1933-11-02 Gen Electric Co Ltd Improvements in or relating to withdrawable electric switchgear
US2445588A (en) * 1944-07-11 1948-07-20 Gen Electric Electrical switchgear
US2978560A (en) * 1958-03-20 1961-04-04 Ite Circuit Breaker Ltd Interrupter unit for telescoping blade switch
DE1993592U (de) * 1968-04-25 1968-09-12 Siemens Ag Kurzschliessvorrichtung fuer senkrecht verlegte stromschienen.
CH497057A (de) * 1969-03-03 1970-09-30 Bbc Brown Boveri & Cie Schaltanlage mit mindestens einem verschiebbaren Schaltgerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399286A (en) * 1966-03-07 1968-08-27 Powerdyne Inc High voltage electric swtich

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027126A (en) * 1973-12-14 1977-05-31 Siemens Aktiengesellschaft Shorting and grounding arrangement for gas-insulated bus bars
US4130850A (en) * 1977-01-12 1978-12-19 Gould Inc. High speed fault diverter switch for gas-insulated systems
CN1042469C (zh) * 1994-02-18 1999-03-10 Abb研究有限公司 开关装置
US20030178891A1 (en) * 2002-03-19 2003-09-25 Toshihisa Miyamoto Gas insulated switch
US9407083B1 (en) * 2012-04-26 2016-08-02 The Boeing Company Combined subtransient current suppression and overvoltage transient protection

Also Published As

Publication number Publication date
GB1438980A (en) 1976-06-09
JPS4957301A (xx) 1974-06-04
DE2230900B2 (de) 1980-07-03
AT355660B (de) 1980-03-10
CH552294A (de) 1974-07-31
SE390093B (sv) 1976-11-29
JPS5515938B2 (xx) 1980-04-26
FR2189916B1 (xx) 1977-02-18
FR2189916A1 (xx) 1974-01-25
DE2230900A1 (de) 1974-01-17
ATA524673A (de) 1979-08-15
DE2230900C3 (de) 1981-03-12

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