EP1244124A1 - Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter - Google Patents

Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter Download PDF

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Publication number
EP1244124A1
EP1244124A1 EP01830197A EP01830197A EP1244124A1 EP 1244124 A1 EP1244124 A1 EP 1244124A1 EP 01830197 A EP01830197 A EP 01830197A EP 01830197 A EP01830197 A EP 01830197A EP 1244124 A1 EP1244124 A1 EP 1244124A1
Authority
EP
European Patent Office
Prior art keywords
spring
shaft
opening
closing
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.)
Withdrawn
Application number
EP01830197A
Other languages
English (en)
French (fr)
Inventor
Matteo Anelli
Oris Lorenzoni
Giuseppe Ziliani
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.)
Technoelectric Srl
Original Assignee
Technoelectric Srl
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 Technoelectric Srl filed Critical Technoelectric Srl
Priority to EP01830197A priority Critical patent/EP1244124A1/de
Publication of EP1244124A1 publication Critical patent/EP1244124A1/de
Withdrawn legal-status Critical Current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
    • H01H3/3005—Charging means
    • H01H3/3021—Charging means using unidirectional coupling
    • 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
    • H01H3/3005—Charging means
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • 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
    • H01H2003/3084—Kinetic energy of moving parts recuperated by transformation into potential energy in closing or opening spring to be used in next operation

Definitions

  • the present invention concerns a spring-operated energy accumulation control for medium and high-voltage circuit breakers, hereinafter to be referred to more simply as spring-operated control, and, more particularly, concerns a power device of the said spring-operated control.
  • Figure 1 shows that, using either the crank 4 or the motor 5, the shaft 6 can be made to rotate in the direction of the arrow 7, so that, in its turn, it will cause the rotation of the crank 8; passing its bottom dead centre position, the said crank 8 completes the tensioning of the closing spring 2 and comes to a stop when the roller 9 of the cam 10 comes into contact with the closing release device 11 ( Figure 2).
  • the lever 12 Given the constant profile of the cam 10, the lever 12 will remain stationary during this phase and the pole 1 of the circuit breaker will therefore remain open. During the tensioning of the closing spring 2 the ratchet wheel 13 ensures that the tensioning will proceed in one direction only.
  • the starting position is the one illustrated by Figure 4, i.e.:
  • the circuit breaker is ready to perform a first opening (O) by unblocking the opening release device 23.
  • control still has the energy - in the tensioned closing spring 2 - for performing a further closing (C) and opening (O) cycle.
  • control described above has as its principal drawback the constructional complexity that essentially derives from a very large number of components, including - for example - the presence of at least two shafts, at least two cams and one or two dampers.
  • the spring-operated energy accumulation control for medium- and high-voltage circuit breakers constituting the object of the present invention overcomes the aforesaid drawbacks and the power device of the proposed control as characterized in the claims comprises of a first shaft, which is fixed in the control housing and carries a partially toothed ratchet wheel (hereinafter referred to more simply as “toothed wheel”) that can rotate about its longitudinal axis; a second shaft, likewise fixed in the control housing and having its axis parallel to and eccentric with respect to the axis of the first shaft, that carries the first end of a crank that rotates around the second shaft axis, the said toothed wheel being associated with a ratchet device and carrying also a dragging means capable of rotating the said crank into a desired position; the toothed wheel also carries a blocking means to bring it to a halt against a closing release device and a means for connecting the free end of a closing spring of which the other end is anchored to the base of the control;
  • a latch is associated with the said toothed wheel to engage a toothed portion of the said wheel, thus permitting the wheel to rotate only in one direction.
  • Known auxiliary contacts of the circuit breaker position indicator are controlled by the said release device associated with the second end of the crank.
  • the control also comprises a mechanical means for preventing the carrying out of erroneous manoeuvres when the circuit breaker is closed.
  • the toothed wheel is made to rotate by means of the ratchet device engaging with the toothed portion of the wheel to permit the means linked to the closing spring to rotate until it goes beyond its lower dead centre position, thus making the said spring tensioned; the tensioning of the closing spring comes to an end when the said blocking means comes to rest against the closing release device; once the tensioning of the spring has come to an end, the toothed portion of the said wheel is situated outside the action of the ratchet device; in this phase the crank is still in line with the said manoeuvering bar and in this position the known lever mechanisms, transmission shaft and opening spring keep the circuit breaker open.
  • the crank will remain in this position, while the toothed wheel will continue its rotation until the means linking it to the closing spring reaches its top dead centre position.
  • the toothed wheel recuperates the residual energy of the closing spring and comes to a halt in a non-return position established by the point where the ratchet device and the latch engage with the toothed portion of the wheel.
  • the circuit breaker pole is closed, the opening spring is tensioned, the opening release device is set, while the closing spring is slackened and conserves only residual energy. From this condition an opening action will unblock the aperture release device, thus freeing the crank, which can now rotate in the direction contrary to the toothed wheel to open the circuit breaker pole by means of the opening spring, the transmission shaft and the known lever mechanisms.
  • the principal advantages of the present invention derive from the fact that the power device of the control is made up of a small number of parts, that no regulation of any the various parts is needed during the assembly phase, that all the control organs are mounted on a single base plate, which renders assembly easy and ensures good access the various parts.
  • Other advantages of the present invention are constituted by the fact that all the components of the kinematic chain that bring about the closing and the opening of the circuit breaker work in tension and are arranged in one and the same action plane without any shafts that transfer the action onto other planes, an arrangement that assures also absence of play and transverse components in torsion or bending in the supports, the housing and the cross bars of the control and the circuit breaker with almost complete absence of vibrations while the circuit breaker is being operated.
  • FIGS 6 to 11 are schematic views showing the control in different operating phases.
  • Figure 6 shows the shaft 30 that carries the partially toothed wheel 31 and is also provided with an eccentric extension 32 on which there is mounted a first end of the crank 33.
  • the figure indicates that the said wheel is partially toothed and can therefore engage with the ratchet device 34, which can be moved by means of the lever 35 or the electric motor 36 and also continuously engages with the latch 37.
  • the figure further indicates that the wheel 31 is provided with a dragging tooth 38 that receives a blocking roller 39; the wheel 31 is also provided with the pin 40 extended through the surface thereof upto passing throug a housing plate (not shown) bearing a circular opening wherein the pin moves in order to connect the free end of the closing spring 41 with the toothed wheel 31 by means of the bar 42 positioned beyond said housing plate.
  • the said crank 33 carries a release roller 43.
  • the figure also shows a closure release device 44 and an opening release device 45, against which - as will be explained later - there come to a halt, respectively, the blocking roller 39 and the release roller 43.
  • the said other end of the crank is also rotatably connected with the first end of the manoeuvering bar 46 that has its other end connected to the lever mechanisms 47, 48, 49, 51, 52, the transmission shaft 50 and the opening spring 53 to close the circuit breaker pole 54, which in the figure is shown in its open position.
  • Figure 6 shows the control in its rest position, i.e. with the closing spring 41 slack, the opening spring 53 slack and the circuit breaker pole 54 open.
  • the crank 33 is in line with the manoeuvering bar 46, so that the open position of the circuit breaker pole 54 is stable and invariable in time with the service manoeuvres. This position is reached in a gradual manner at the end of the opening manoeuvre without there being any need for a damping device.
  • the toothed wheel 31 is made to rotate in an anti-clockwise direction (arrow F), either manually by means of the lever 35 or electrically by means of the motor 36, via the ratchet device 34, which engages with the toothed rim of the wheel 31, to enable the connecting pin 40 of the closing spring 41 to rotate beyond its bottom dead centre and thus to tension the said closing spring 41; the tensioning of the closing spring terminates when the said blocking roller 39 comes to rest against the closure release device 44; once the tensioning of the closing spring 41 has been completed, the toothed rim of the wheel 31 is outside the action range of the ratchet device 34; it can be seen from the figure that the crank bar 33 does not undergo any displacement in this phase and it therefore remains in line with the manoeuvering bar 46, so that the lever mechanisms 47, 48, 49, 51, 52, the transmission shaft 50 and the opening spring 53 likewise do not undergo any change of position and therefore keep the circuit breaker pole 54 open.
  • arrow F anti-clockwise direction
  • a subsequent action which may be either manual or electrical, unblocks the closure release device 44, thus freeing the toothed wheel 31 and allowing it to rotate under the action of the closing spring 41.
  • the dragging tooth 38 is in contact with the other end of the crank 33 until the release roller 43 comes to rest against the said opening release device 45 to restrain the crank 33; during this rotation the crank 33 drags the manoeuvering bar 46 and thus displaces the lever mechanisms 47, 48, 49, which in their turn tension the opening spring 53 and - at one and the same time - cause the transmission shaft 50 to rotate in the direction of the arrow F', thus rotating the lever mechanisms 51 and 52 and closing the circuit breaker pole 54.
  • the crank 33 remains in the said position, where it is retained by the opening release device 45, while the toothed wheel 31 continues its rotation until the pin 40 for connecting the closing spring 41 attains its upper dead centre position.
  • the toothed wheel 31 recuperates the residual energy of the closing spring 41, coming to a halt in a non-return position defined by the engagement of the ratchet device 34 and the latch 37 with the toothed rim of the wheel 31.
  • the circuit breaker pole 54 is closed, the opening spring is tensioned, the opening release device 45 is set and the closing spring 41 is slack and conserves only some residual energy.
  • an opening action be it manual or electrical, will unblock the opening release device 45, thus freeing the crank 33 and enabling it to rotate in a clockwise direction to open the circuit breaker pole 54 via the opening spring 53, the lever mechanisms 47, 48, 49, 51, 52 and the shaft 50.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP01830197A 2001-03-21 2001-03-21 Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter Withdrawn EP1244124A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01830197A EP1244124A1 (de) 2001-03-21 2001-03-21 Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830197A EP1244124A1 (de) 2001-03-21 2001-03-21 Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter

Publications (1)

Publication Number Publication Date
EP1244124A1 true EP1244124A1 (de) 2002-09-25

Family

ID=8184456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01830197A Withdrawn EP1244124A1 (de) 2001-03-21 2001-03-21 Federkraftspeicherantrieb für Mittel- und Hochspannungsschalter

Country Status (1)

Country Link
EP (1) EP1244124A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1901324A3 (de) * 2006-09-18 2009-03-04 Schaltbau GmbH Vakuumschalter
EP2204827A3 (de) * 2008-12-31 2013-09-11 LS Industrial Systems Co., Ltd Leistungsschalter mit verzögertem drehbarem Nocken für Feder-Motor
CN113113270A (zh) * 2021-04-14 2021-07-13 西安西电开关电气有限公司 一种合闸保持分闸脱扣系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689721A (en) * 1971-09-16 1972-09-05 Westinghouse Electric Corp Circuit breaker including ratchet and pawl spring charging means and ratchet teeth damage preventing means
DE2420492A1 (de) * 1974-04-25 1975-10-30 Siemens Ag Motorgetriebene antriebsvorrichtung fuer elektrische schaltgeraete
US5280258A (en) * 1992-05-22 1994-01-18 Siemens Energy & Automation, Inc. Spring-powered operator for a power circuit breaker
EP0847065A1 (de) * 1996-12-06 1998-06-10 AEG Sachsenwerk GmbH Antrieb für einen Schalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689721A (en) * 1971-09-16 1972-09-05 Westinghouse Electric Corp Circuit breaker including ratchet and pawl spring charging means and ratchet teeth damage preventing means
DE2420492A1 (de) * 1974-04-25 1975-10-30 Siemens Ag Motorgetriebene antriebsvorrichtung fuer elektrische schaltgeraete
US5280258A (en) * 1992-05-22 1994-01-18 Siemens Energy & Automation, Inc. Spring-powered operator for a power circuit breaker
EP0847065A1 (de) * 1996-12-06 1998-06-10 AEG Sachsenwerk GmbH Antrieb für einen Schalter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1901324A3 (de) * 2006-09-18 2009-03-04 Schaltbau GmbH Vakuumschalter
CN101150024B (zh) * 2006-09-18 2012-08-29 沙尔特宝有限公司 真空开关
EP2204827A3 (de) * 2008-12-31 2013-09-11 LS Industrial Systems Co., Ltd Leistungsschalter mit verzögertem drehbarem Nocken für Feder-Motor
CN113113270A (zh) * 2021-04-14 2021-07-13 西安西电开关电气有限公司 一种合闸保持分闸脱扣系统

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