EP0612086A1 - Entraînement pour un disjoncteur électrique de puissance - Google Patents

Entraînement pour un disjoncteur électrique de puissance Download PDF

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Publication number
EP0612086A1
EP0612086A1 EP94250026A EP94250026A EP0612086A1 EP 0612086 A1 EP0612086 A1 EP 0612086A1 EP 94250026 A EP94250026 A EP 94250026A EP 94250026 A EP94250026 A EP 94250026A EP 0612086 A1 EP0612086 A1 EP 0612086A1
Authority
EP
European Patent Office
Prior art keywords
transmission element
cam
cam disc
movement
braking
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.)
Granted
Application number
EP94250026A
Other languages
German (de)
English (en)
Other versions
EP0612086B1 (fr
Inventor
Bernd Dr. Räth
Karsten Laskowski
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
Publication of EP0612086A1 publication Critical patent/EP0612086A1/fr
Application granted granted Critical
Publication of EP0612086B1 publication Critical patent/EP0612086B1/fr
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
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • 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

Definitions

  • the invention relates to a drive for an electrical circuit breaker having a drivable cam disk which is rotatably mounted about a fixed axis and which, when moving in the interval between a first position and a second position, drives a transmission element which is movable perpendicularly to the axis and which forms parts of the circuit breaker drives and is connected to a braking element retarding its movement.
  • Such a drive for a circuit breaker is known for example from DE-PS 25 17 134.
  • an axis on which a cam disc is fixed is driven by an engagement spring.
  • a second shaft is driven by the cam disc via a pin, the rotary movement of which is transmitted to a circuit breaker interrupter unit via two cranks.
  • a switch-off spring acts on the second shaft, which counteracts the movement of the cam disc during the switch-on process, thereby delaying the movement of the cam disc and tensioning it itself.
  • the energy of the closing spring and thus the energy transmitted from the cam plate must be excess to compensate for temperature fluctuations and mechanical tolerances.
  • the excess of the energy acting on the interrupter unit must then be absorbed either in the parts transmitting the driving force or in an additional shock absorber. It usually can no unlimited overstroke of the drive parts when switched on.
  • the invention is therefore based on the object of designing a drive of the type mentioned in such a way that the overstroke and the excess of dynamic energy of the parts driven by the cam disc are kept as low as possible without excess dynamic energy having to be absorbed by parts of the drive .
  • the cam is shaped such that the differential quotient from the distance traveled by the transmission element and the angle of rotation of the cam, viewed as a function of the angle of rotation of the cam, an absolute maximum in the range between the first position and the Has middle of the interval and represents a monotonically falling function in the area between the position of the absolute maximum and the second position.
  • the first and the second position of the cam disc limit the interval in which movement of the cam disc results in movement of the transmission element.
  • the differential quotient mentioned corresponds to the derivation of the path of the transmission element according to the cam disk rotation angle.
  • the aim of the invention is to design the cam disc in such a way that the transmission element bears against the cam disc during the entire process of transferring energy through the cam disc to the transmission element.
  • the transmission element Due to the "slope" of the cam, the transmission element is accelerated when the cam moves in the first part of the movement. In a second part of the movement, force is still transmitted from the cam to the transmission element, but this does not serve to further accelerate the transmission element, but rather is used for the mechanical work that the transmission element passes on to the other parts of the drive. At the end of the drive process, the transmission element is gradually braked to a standstill.
  • the transmission element remains in constant contact with the cam plate, so that the overstroke can be completely controlled by the design of the cam plate, then the condition must be met that the transmission element by him driven parts of the circuit breaker and the braking element is retardable to the extent required by the movement impressed by the cam on the transmission element. If the "slope" of the cam disc becomes smaller in this phase of the drive process, the speed of the transmission element would remain constant in the event that no braking forces act and the transmission element would separate from the cam disc. A detachment of the transmission element from the cam also takes place if the braking forces on the transmission element are not sufficiently large to brake this sufficiently according to the course of the cam.
  • cam disc being designed in such a way that the braking of the transmission element is initiated as early as possible in order to keep the braking acceleration which must be applied by the braking element as low as possible. Nevertheless, the transmission element must cover the largest possible distance in the shortest possible time in order to complete the switching operation of the circuit breaker as quickly as possible.
  • the transmission element reaches its highest speed as quickly as possible, so that it can then be braked to a standstill over an area that is as long in time and location as possible.
  • no particularly strongly decelerating braking element is necessary in order to ensure constant contact between the transmission element and the cam disc. This enables precise control of the movement of the transmission element by designing the cam plate accordingly. An unnecessary overstroke can thus be avoided. This can also drastically reduce the excess energy required to compensate for tolerances.
  • the invention can advantageously be designed in that the monotonically falling function is convex and in that the braking element is designed such that the braking force on the transmission element between the constellation, which corresponds to the position of the cam disc at the absolute maximum and the constellation, which corresponds to the second position of the cam, increases continuously.
  • Another advantageous embodiment of the invention provides that the differential ratio in the first position of the cam is zero.
  • the differential quotient is zero in the second position of the cam.
  • This configuration means that in the second position of the cam, the transmission element and the parts of the circuit breaker driven thereby have no dynamic energy, so that an overstroke of the driven parts is avoided.
  • a further advantageous embodiment of the invention provides that the brake element is designed as a spring.
  • the braking element is designed to be particularly simple in terms of construction, and the spring characteristic, depending on its design, allows a desired profile for the deceleration of the transmission element to be implemented as a function of the distance covered by this.
  • the braking element is designed as an energy store for the circuit breaker.
  • the transmission element serves to transmit the driving force of the cam disc to the electrical contacts of an interrupter unit to be actuated, and on the other hand to charge a force accumulator during this movement, which serves as a drive for an opposite switching movement of the interrupter unit.
  • the energy accumulator can be designed, for example, as a spring accumulator, in which case the characteristic of the spring determines the profile of the deceleration of the transmission element.
  • Figure 1 shows schematically an interrupter unit with a drivable contact 2 and an opening spring 3, which serves as an energy store for driving the contact 2 during an opening movement.
  • a switch-on spring 4 is relaxed, one end 5 of which is fixed and the other end 6 is connected to a crank wheel 8 by means of a connecting rod 7.
  • the crank wheel 8 is rotatably mounted on an axis 9 and is firmly connected to a cam disk 10.
  • the transmission element 11 is driven in the form of a roller pivotally attached to a handlebar 12.
  • a connecting rod 21 is articulated to the transmission element 11 and is movably connected at its end 13 facing away from the transmission element to a stationary crank 14. A pushing movement on the push rod 21 is converted by the crank 14 into a pushing movement of the switching rod 15 in the direction of the arrow 16 and thereby the contact 2 is actuated so that the interrupter unit carries out a switch-on movement.
  • the movement of the transmission element 11 also moves a compression of the switch-off spring 3.
  • the switch-off spring 3 thus counteracts the movement of the transmission element 11 when the cam disk 10 rotates. As a result, the transmission element 11 is printed against the cam plate 10.
  • the aim of the invention is to ensure that the counterforce acting on the transmission element 11 through the switch-off spring 3 and possibly an additional damping device 17 is sufficiently large that the transmission element 11 does not lift off the cam plate 10 at any point.
  • the movement of all parts connected to the transmission element 11 in the course of a rotation of the cam disc is determined solely by the shape of the cam disc and can therefore be precisely determined.
  • FIGS. 2 to 5 each show graphs in which the cam disc rotation angle normalized to 1 is plotted on the abscissa.
  • “0” denotes the first position at which the cam disc comes into contact with the transmission element 11
  • “1” denotes the second position of the cam disc and thus the end of the movement transmission.
  • the ordinate shows the angle traveled by the link 12 of the transmission element, which is a measure of the distance traveled by the transmission element 11.
  • f1 denotes the movement of the transmission element when the cam is in the form of an Archimedean spiral, i. H. has a curve with a constant slope. Accordingly, f1 is a straight line, which means that the angle of rotation of the link 12, which is traversed per unit angle traveled by the cam disk 10, is the same in every phase of the movement.
  • f2 denotes an improved variant.
  • the cam plate 10 is shaped here so that a finite rotation of the cam plate 10 does not lead to a movement of the transmission element 11 at the start of the switch-on movement. This avoids an impact on the transmission element 11.
  • a movement of the cam plate 10 is transmitted particularly effectively to the transmission element 11.
  • similar conditions result as in the initial area, so that the cam disc can run out without the transmission element 11 being driven further.
  • the corresponding derivation function is shown for a cam disk designed according to the invention.
  • This fulfills the above-mentioned conditions that the derivative is zero at the beginning and end of the transfer movement.
  • the maximum 18 of the derivative function lies in the first half 19 of the interval 20 between the beginning and end of the movement transmission. This ensures that a strong acceleration acts on the transmission element at the beginning of the movement, so that it can travel a long distance in a short time.
  • the route to be covered by the transmission element 11, which is ultimately determined by the route to be traveled by the drivable contact 2, is therefore very quickly largely covered. It the braking of the movement of the transmission element 11 can therefore also be initiated relatively early.
  • FIG. 5 shows the graph of the function f according to the invention, its first derivative and its second derivative, in each case according to the cam disk rotation angle.

Landscapes

  • Transmission Devices (AREA)
  • Electronic Switches (AREA)
  • Relay Circuits (AREA)
EP94250026A 1993-02-16 1994-02-09 Entraînement pour un disjoncteur électrique de puissance Expired - Lifetime EP0612086B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4305512 1993-02-16
DE4305512A DE4305512A1 (de) 1993-02-16 1993-02-16 Antrieb für einen elektrischen Leistungsschalter

Publications (2)

Publication Number Publication Date
EP0612086A1 true EP0612086A1 (fr) 1994-08-24
EP0612086B1 EP0612086B1 (fr) 1996-07-03

Family

ID=6481117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94250026A Expired - Lifetime EP0612086B1 (fr) 1993-02-16 1994-02-09 Entraînement pour un disjoncteur électrique de puissance

Country Status (3)

Country Link
EP (1) EP0612086B1 (fr)
AT (1) ATE140099T1 (fr)
DE (2) DE4305512A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007016880A1 (fr) * 2005-08-10 2007-02-15 Siemens Aktiengesellschaft Interrupteur de puissance
CN104681346A (zh) * 2013-11-29 2015-06-03 施耐德电器工业公司 使sbs与rmu的隔离开关同步的致动隔离开关闸刀的联动装置
CN109244938A (zh) * 2018-10-23 2019-01-18 国网湖南省电力有限公司 一种架线施工用防跑线速刹器

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504714B4 (de) * 1995-02-14 2006-08-24 Daimlerchrysler Ag Verfahren und Vorrichtung zur Überwachung einer Zustandsgröße eines Leistungsschalters
DE29503322U1 (de) * 1995-02-15 1995-04-13 Siemens AG, 80333 München Verklinkungseinrichtung für einen Antrieb eines Hochspannungs-Leistungsschalters
DE19542690A1 (de) * 1995-11-16 1997-05-22 Aeg Niederspannungstech Gmbh Vorrichtung zum zwangsweisen Trennen von Netzleitungen bei Schaltgeräten
KR100325408B1 (ko) * 1999-10-26 2002-03-04 이종수 회로차단기용 접점개폐장치
DE10153108C1 (de) * 2001-10-22 2003-11-13 Siemens Ag Verfahren zur Steuerung eines zwischen einer "Einfahrstellung" und einer "Ausfahrstellung" verfahrbaren elektrischen Schaltermoduls
KR101786519B1 (ko) * 2013-01-08 2017-10-18 엘에스산전 주식회사 가스 절연 차단기
GB2557582A (en) * 2016-09-14 2018-06-27 Eaton Ind Netherlands Bv Mechanism for opening and closing a circuit breaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT208451B (de) * 1958-12-20 1960-04-11 Sprecher & Schuh Ag Einschaltvorrichtung mit Federkraftspeicher für elektrische Leistungsschalter
CH561956A5 (fr) * 1974-04-25 1975-05-15 Sprecher & Schuh Ag
DD126231A1 (fr) * 1976-06-16 1977-07-06

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT208451B (de) * 1958-12-20 1960-04-11 Sprecher & Schuh Ag Einschaltvorrichtung mit Federkraftspeicher für elektrische Leistungsschalter
CH561956A5 (fr) * 1974-04-25 1975-05-15 Sprecher & Schuh Ag
DE2517134C2 (de) * 1974-04-25 1983-07-14 Sprecher & Schuh AG, 5001 Aarau, Aargau Antrieb für einen elektrischen Leistungsschalter
DD126231A1 (fr) * 1976-06-16 1977-07-06

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007016880A1 (fr) * 2005-08-10 2007-02-15 Siemens Aktiengesellschaft Interrupteur de puissance
CN104681346A (zh) * 2013-11-29 2015-06-03 施耐德电器工业公司 使sbs与rmu的隔离开关同步的致动隔离开关闸刀的联动装置
CN104681346B (zh) * 2013-11-29 2018-10-26 施耐德电器工业公司 使sbs与rmu的隔离开关同步的致动隔离开关闸刀的联动装置
CN109244938A (zh) * 2018-10-23 2019-01-18 国网湖南省电力有限公司 一种架线施工用防跑线速刹器
CN109244938B (zh) * 2018-10-23 2024-02-02 国网湖南省电力有限公司 一种架线施工用防跑线速刹器

Also Published As

Publication number Publication date
DE59400383D1 (de) 1996-08-08
EP0612086B1 (fr) 1996-07-03
DE4305512A1 (de) 1994-08-18
ATE140099T1 (de) 1996-07-15

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