US3898409A - Spring charging actuating mechanism for an electric switching device - Google Patents

Spring charging actuating mechanism for an electric switching device Download PDF

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Publication number
US3898409A
US3898409A US376941A US37694173A US3898409A US 3898409 A US3898409 A US 3898409A US 376941 A US376941 A US 376941A US 37694173 A US37694173 A US 37694173A US 3898409 A US3898409 A US 3898409A
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US
United States
Prior art keywords
housing
springs
spring
shaft
shafts
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
US376941A
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English (en)
Inventor
Reinhard Liebig
Siegfried Jahrig
Werner Kogler
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
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3898409A publication Critical patent/US3898409A/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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3068—Housing support frame for energy accumulator and cooperating mechanism

Definitions

  • first and second springs for re spectively storing the energy needed for closing and the energy needed for opening the apparatus.
  • the actuating mechanism further has a tensioning device for tensioning the spring as well as a housing for receiving the tensioning device therein.
  • An improved mounting arrangement of the actuating mechanism includes first and second shafts mounted in the housing so as to have respective end-portions projecting from the housing.
  • the springs are disposed outside the housing and have respective ends anchored to the housing.
  • the other end of the first spring and the other end of the second spring are connected to the end-portion of the first shaft and to the end-portion of the second shaft respectively so as to coact therewith.
  • the actuating mechanism can be adapted to switching apparatus of high or lower switching capacity and therewith more or less energy requirements for the switching operations.
  • the invention then is based on an actuating mechanism for electric switching apparatus such as electric power circuit breakers or the like.
  • the actuating mechanism is equipped with first and second springs for respectively storing the energy needed for closing and the energy needed for opening the apparatus, a tensioning device for tensioning the springs, and a housing for receiving the tensioning device therein as well as bearing shafts needed to switch the apparatus.
  • the improved mounting arrangement of the actuating mechanism includes as a feature that first and second shafts of the tensioning device are mounted in the housing so as to have respective end-portions projecting from the housing.
  • the springs are disposed outside of the housing and have respective ends anchored to the housing.
  • the other end of the first spring and the other end of the second spring are connected to the endportion of the first shaft and to the end-portion of the second shaft respectively so as to coact therewith.
  • the housing there is chosen the usual proportions of its sides, with which the depth is less than the edge-lengths of the front and rear sides, there is obtained a favorable form of construction, if the springs for storing the switch-closing and switchopening energy are disposed outside the narrow sides of the housing.
  • the coaction of the springs with the shafts of the operating mechanism is then possible in the same way as with the conventional disposition of the springs inside the housing.
  • the new arrangement however offers the advantage of protection against damage, because the springs, being outside the housing, are accessible for inspection and maintenance work.
  • the invention moreover gives a favorable arrangement for the bearings for the shafts which decreases the stress on the bearings.
  • the shaft for the switch-closing spring can be disposed at a greater distance from its point of suspension than the shaftfor the switch-opening spring. This gives a larger installation space for the switch-closing spring.
  • the disposition of the springs in the general structure of the switching apparatus is also convenient, because the housing for the actuating mechanism can now be kept narrower, and thus the overall width of the switching apparatus is not altered.
  • the invention is especially suited for medium-voltage power breakers of the oil-poor type.
  • a circuit breaker of the oil-poor type is one wherein a jet of oil is generated at the breaking gap which quenches the arc occurring during breaker opening operations.
  • the drawing shows, in schematic perspective, the improved mounting arrangement according to the invention for an actuator mechanism suitable, for example, for actuating a three pole power circuit breaker.
  • the drawing emphasizes those portions of the actuator mechanism needed for an understanding of the improved mounting arrangement according to the invention. More specifically, the drawing includes:
  • FIG. 1 as a schematic perspective diagram illustrating an actuator mechanism equipped with the improved mounting arrangement according to the invention; this view shows the actuator mechanism in its open position wherein the closing spring is tensioned and the opening spring is relaxed;
  • FIG. 2 is also a schematic perspective diagram showing a pertinent portion of the actuator mechanism to illustrate the closed position wherein both springs are tensioned;
  • FIG. 3 likewise shows the closed position wherein, however, the closing spring is again tensioned preparatory for a new switching operation.
  • the housing I of the actuating mechanism is made from sheet metal and bent to have a U-shape.
  • the legs Zand 3 of the U-shaped housing 1 are provided with outwardly directed bent portions which provide reinforcement for securing the breaker and for accommodating a cover.
  • Two mutually parallel carrier rails 7 and 10 are mounted on the center portion 6 of the housing 1; these rails 7 and 10 have bores 8 and 9 for securing the switching poles one of which is shown in the drawing and designated by reference numeral 31. Additional bores II and 12 are provided for mounting the breaker.
  • a carrier rail 13 is mounted in the legs 2 and 3 of the housing 1 and serves to reinforce the same.
  • the outwardly extending end-portions 15 and 14 of the rail 13 serve to anchor a breaker closing spring 16 and a breaker opening spring 17, respectively.
  • the closing spring 16 coacts with crank-arm 20 fixedly mounted on the outwardly extending portion of spring winding shaft 21.
  • a switching shaft 22 is mounted in the legs 2 and 3 which likewise has an outwardly extending end-portion provided with a crank-arm 23.
  • the breaker opening spring 17 coacts with the crank-arm 23.
  • a larger installation space is provided for the breaker closing spring 16 by the arrangement of the spring-winding shaft 21 beneath the switching shaft 22.
  • FIG. 1 illustrates the actuating mechanism in the open position of the breaker which corresponds to the operational ready position wherein the closing spring 16 is tensioned.
  • the closing magnet 26 is actuated for releasing a latching arrangement (not illustrated) of the shaft 21.
  • the shaft 21 moves through a one half rotation and thereby moves'the shaft 22 by means of a cam disc 37 and a crank arm 41 provided with a roller 40.
  • the switching pole 31 is actuated through a crank arm 32 and a coupling rod 33 while at the same time, the breaker opening spring 17 is tensioned by means of the crank arm 23.
  • the crank arm 23 mounted on shaft 22 then takes on the position shown in FIG. 2.
  • the parts remain in the position shown in FIG. 2 for only a short time because in the lower position of the crank arm, the unit 24 is closed through self action.
  • the unit 24 rotates shaft 21 stepwise by means of a push crank 34 and a push pawl 35 which engages the ratchet wheel 36'until the shaft 21 reaches the position corresponding to FIG. 3 thereby tensioning the closing spring 16.
  • the breaker closing spring 16 stores the energy needed for closing the switching pole 31 and additional switching poles (not illustrated) as well as the energy for tensioning the opening spring 17.
  • an additional latching arrangement (not shown) is released by actuating the breaker opening magnet 27 thereby releasing shaft 22.
  • the shaft 22 then opens the switching pole 31 by means of the crank arm 32 mounted on shaft 22 and the coupling rod 33.
  • the position then occupied by the parts is shown in FIG. 1 wherein the breaker closing spring 16 is tensioned and the breaker opening spring 17 is relaxed.
  • the drawing shows that the total width of the actuathe unit 24 and are assembled in a block.
  • An electrounits 30 is provided beneath the electromagnet 26 and the additional unit 27.
  • an actuating mechanism for an electric circuit breaker equipped with at least one switching pole said mechanism including first and second springs for respectively storing the energy needed for closing and the energy needed for opening the apparatus, a tensioning device for tensioning the springs and including first and second shafts having respective end portions, and a housing for receiving the tensioning device therein, the housing including mutually adjacent narrow side walls for accommodating the first and second shafts of the tensioning device thereon, wherein the improvement comprises the first and second shafts mounted in said housing so as to cause the end-portions of the first and second shafts respectively to project from said housing, said first and second springs being disposed outside of said housing and having respective one ends, and anchor means for anchoring said one ends of said springs to the housing at respective anchor locations, the other end of the first spring being connected to said endportion of said first shaft so as to coact therewith and the other end of the second spring being connected to the end-portion of said second shaft so as to coact therewith, said first shaft and said anchor means conjointly supporting said first spring adjacent the outer side of
  • an actuating mechanism for an electric switching apparatus such as an electric circuit breaker or the like, said mechanism including first and second springs for respectively storing the energy needed for closing and the energy needed for opening the apparatus, a tensioning device for tensioning the springs and including first and second shafts having respective end portions, and a housing for receiving the tensioning device therein, the housing including mutually adjacent narrow side walls for accommodating the first and second shafts of the tensioning device thereon, wherein the improvement comprises the first and second shafts mounted at fixed locations in said housing so as to cause the end-portions of the first and second shafts respectively to project from said housing, said first and second springs being disposed outside of said housing and having respective one ends, and anchor means for anchoring said one ends of said springs to the housing at respective anchor locations, the other end of the first spring being connected to said end-portion of said first shaft so as to coact therewith and the other end of the second spring being connected to the end-portion of said second shaft so as to coact therewith, said first shaft and said anchor means conjointly supporting said first first

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Radar Systems Or Details Thereof (AREA)
US376941A 1972-07-24 1973-07-06 Spring charging actuating mechanism for an electric switching device Expired - Lifetime US3898409A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2236788A DE2236788B2 (de) 1972-07-24 1972-07-24 Antriebsvorrichtung für elektrische Schaltgeräte

Publications (1)

Publication Number Publication Date
US3898409A true US3898409A (en) 1975-08-05

Family

ID=5851812

Family Applications (1)

Application Number Title Priority Date Filing Date
US376941A Expired - Lifetime US3898409A (en) 1972-07-24 1973-07-06 Spring charging actuating mechanism for an electric switching device

Country Status (13)

Country Link
US (1) US3898409A (de)
JP (1) JPS4951563A (de)
AT (1) AT331346B (de)
BR (1) BR7305507D0 (de)
CH (1) CH555085A (de)
DE (1) DE2236788B2 (de)
ES (1) ES417176A1 (de)
FR (1) FR2194035B1 (de)
GB (1) GB1431912A (de)
NO (1) NO134598C (de)
SE (1) SE387002B (de)
YU (1) YU35293B (de)
ZA (1) ZA734770B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095676A (en) * 1976-11-23 1978-06-20 Howe-Yin Research Co., Inc. Stored energy operation for breakers
US4256941A (en) * 1978-03-09 1981-03-17 Asea Aktiebolag Spring operating devices for high-voltage circuit-breakers
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
US4587390A (en) * 1985-01-07 1986-05-06 Golden Gate Switchboard Co. Vacuum circuit breaker
US4636602A (en) * 1985-04-10 1987-01-13 S&C Electric Company Linear operating mechanism for electrical switches
US5107715A (en) * 1988-12-09 1992-04-28 Gec Alsthom Sa Circuit breaker drive mechanism
CN104882306A (zh) * 2015-06-05 2015-09-02 宁波耐森电气科技有限公司 一种夹板式双弹簧操动机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4335969A1 (de) * 1993-10-21 1995-04-27 Sachsenwerk Ag Antriebsmodul für Mittelspannungs-Schaltgeräte

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961067A (en) * 1958-11-12 1960-11-22 Ite Circuit Breaker Ltd Electrically operated stored energy system for circuit breakers
US3176796A (en) * 1963-07-15 1965-04-06 Ite Circuit Breaker Ltd Control mechanism for spring close circuit breakers
US3196983A (en) * 1963-01-03 1965-07-27 Allis Chalmers Mfg Co Means for charging circuit breaker contact operating springs
US3264420A (en) * 1964-07-01 1966-08-02 Gen Electric Cable grounding, three position, snap action switch
US3289790A (en) * 1965-06-16 1966-12-06 Square D Co Spring charging mechanism for a circuit breaker
US3723686A (en) * 1971-06-28 1973-03-27 Mc Graw Edison Co Quick closing mechanism for circuit interrupter
US3772489A (en) * 1972-07-17 1973-11-13 Ite Imperial Corp Racking safety disconnect switch for vacuum circuit breakers
US3773995A (en) * 1972-10-27 1973-11-20 Westinghouse Electric Corp Motor advanced spring charging pawl and ratchet mechanism with spring assist
US3806684A (en) * 1972-08-04 1974-04-23 Westinghouse Electric Corp Mechanism for converting a hand-operated circuit breaker to a motor-operated circuit breaker

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961067A (en) * 1958-11-12 1960-11-22 Ite Circuit Breaker Ltd Electrically operated stored energy system for circuit breakers
US3196983A (en) * 1963-01-03 1965-07-27 Allis Chalmers Mfg Co Means for charging circuit breaker contact operating springs
US3176796A (en) * 1963-07-15 1965-04-06 Ite Circuit Breaker Ltd Control mechanism for spring close circuit breakers
US3264420A (en) * 1964-07-01 1966-08-02 Gen Electric Cable grounding, three position, snap action switch
US3289790A (en) * 1965-06-16 1966-12-06 Square D Co Spring charging mechanism for a circuit breaker
US3723686A (en) * 1971-06-28 1973-03-27 Mc Graw Edison Co Quick closing mechanism for circuit interrupter
US3772489A (en) * 1972-07-17 1973-11-13 Ite Imperial Corp Racking safety disconnect switch for vacuum circuit breakers
US3806684A (en) * 1972-08-04 1974-04-23 Westinghouse Electric Corp Mechanism for converting a hand-operated circuit breaker to a motor-operated circuit breaker
US3773995A (en) * 1972-10-27 1973-11-20 Westinghouse Electric Corp Motor advanced spring charging pawl and ratchet mechanism with spring assist

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095676A (en) * 1976-11-23 1978-06-20 Howe-Yin Research Co., Inc. Stored energy operation for breakers
US4256941A (en) * 1978-03-09 1981-03-17 Asea Aktiebolag Spring operating devices for high-voltage circuit-breakers
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
US4587390A (en) * 1985-01-07 1986-05-06 Golden Gate Switchboard Co. Vacuum circuit breaker
US4636602A (en) * 1985-04-10 1987-01-13 S&C Electric Company Linear operating mechanism for electrical switches
US5107715A (en) * 1988-12-09 1992-04-28 Gec Alsthom Sa Circuit breaker drive mechanism
CN104882306A (zh) * 2015-06-05 2015-09-02 宁波耐森电气科技有限公司 一种夹板式双弹簧操动机构

Also Published As

Publication number Publication date
SE387002B (sv) 1976-08-23
FR2194035B1 (de) 1977-05-13
FR2194035A1 (de) 1974-02-22
ES417176A1 (es) 1976-03-16
NO134598B (de) 1976-08-02
YU35293B (en) 1980-10-31
CH555085A (de) 1974-10-15
DE2236788B2 (de) 1975-05-28
DE2236788A1 (de) 1974-02-07
GB1431912A (en) 1976-04-14
JPS4951563A (de) 1974-05-18
NO134598C (de) 1976-11-10
AT331346B (de) 1976-08-10
ZA734770B (en) 1974-06-26
BR7305507D0 (pt) 1974-08-22
YU173273A (en) 1980-04-30
ATA633473A (de) 1975-11-15

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