EP2654056A1 - Dispositif d'ouverture d'urgence - Google Patents

Dispositif d'ouverture d'urgence Download PDF

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Publication number
EP2654056A1
EP2654056A1 EP12164422.3A EP12164422A EP2654056A1 EP 2654056 A1 EP2654056 A1 EP 2654056A1 EP 12164422 A EP12164422 A EP 12164422A EP 2654056 A1 EP2654056 A1 EP 2654056A1
Authority
EP
European Patent Office
Prior art keywords
opening device
emergency opening
retaining
striking
triggering
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Withdrawn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
EP12164422.3A
Other languages
German (de)
English (en)
Inventor
Osvaldo Prestini
Ravindra Borse
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.)
ABB Technology AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP12164422.3A priority Critical patent/EP2654056A1/fr
Priority to AU2013248585A priority patent/AU2013248585A1/en
Priority to PCT/EP2013/053664 priority patent/WO2013156186A1/fr
Priority to CN201380020606.5A priority patent/CN104246944B/zh
Publication of EP2654056A1 publication Critical patent/EP2654056A1/fr
Withdrawn legal-status Critical Current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
    • H01H3/3052—Linear spring motors

Definitions

  • the present disclosure relates to an emergency opening device suitable for manually opening a switching device, in particular a contactor.
  • the multi-phase contactor comprises, for each phase, a fixed contact and a movable contact which can be positioned between an open position, in which it is operatively separated from the fixed contact, and a closed position, in which it is operatively connected to the fixed contact.
  • the movable contacts are actuated to move between the open and closed positions by means of an electromagnetic actuator which is fed by an auxiliary power supply.
  • An electromagnetic actuator which is fed by an auxiliary power supply.
  • a number of important conditions are required to be satisfied in order to guarantee the proper functional performances during service life in electrical networks; in particular, switching off manoeuvres should be carried out in due time, normally as quickly as possible, in order to prevent possible damages to the equipment. If, under fault conditions, the auxiliary power supply is absent or when the electromagnetic actuator is malfunctioning for any reasons, for instance due to breakage of any components, manual opening operations are necessarily to be performed through a manually intervention on a shifting-mechanism of the electromagnetic actuator which is mechanically linked to the movable contacts.
  • the internal manual opening device intervenes on the abovementioned shifting-mechanism of the electromagnetic actuator which is mechanically linked to the movable contacts.
  • Such an internal manual opening device comprises a kinematic mechanism having an operating shaft, a first pivotal lever movable by the latter, a second pivotal lever movable by the first pivotal lever for acting on the above mentioned shifting-mechanism for opening the electromagnetic actuator, and a suitable cam-step-profile for blocking and enabling a movement of the second lever.
  • an emergency opening device suitable for manually opening a switching device comprising:
  • the present disclosure encompasses also an electric switchgear, equivalently called with the term panel or cabinet or switchboard, including a switching device, in particular a contactor and an emergency opening device as defined in the related appended claims and described herein.
  • an emergency opening device 1 is shown, which is suitable for manually opening a switching device, in particular a contactor included in a medium voltage switchgear, where, for the purposes of the present application, the term medium voltage refers to applications in the range from 1kV up to some tens of kV, e.g. 52 kV.
  • the emergency opening device 1 is of a portable type and can be easily handled by an operator, in an emergency situation, for manually opening a contactor without having to switch off the medium voltage.
  • the emergency opening device 1 mechanically acts on an electromagnetic actuator, more precisely on a shifting-mechanism of the latter which is mechanically linked to the movable electrical contacts of the contactor.
  • the emergency opening device 1 comprises a striking-rod-element 5 which is suitable for transmitting an opening-striking-force to such a shifting mechanism so as to separate the movable contacts from the respective fixed contacts.
  • the emergency opening device 1 comprises a guiding-housing 2 for slidably housing and guiding, along an operating direction 6, the striking-rod-element 5.
  • the striking-rod-element 5 includes a first rod part 7, intended to at least partially protrude out of the guiding-housing 2 for going into contact with the shifting mechanism, and a second rod part 8, which, during functioning, substantially remains inside the guiding-housing 2.
  • the first rod part 7 and the second rod part 8 are mutually fixed trough a threaded coupling so as to define a longitudinal axis 11.
  • the striking-rod-element 5 can also be realized as a single piece element.
  • the guiding-housing 2 is defined by a first guiding-housing part 3 and a second guiding-housing part 4 which are mutually connected and which define respective chambers, in particular an energy-storing-chamber 15 and a retaining-release-chamber 16, better described later on.
  • the second guiding-housing part 4 is delimited by a wall which defines a handle-portion 17 for an operator.
  • a stem portion 9 which is delimited on one end by a flange-portion 10 radially protruding from the striking-rod-element 5.
  • the flange-portion 10 is integrally obtained on one end of the first rod part 7 and is intended to be movably housed inside the first guiding-housing-part 3.
  • the flange portion 10 is shaped for abutting against an internal stop surface 12 which is provided on a wall of the first guiding-housing-part 3 lying transversely to the longitudinal axis 11.
  • the emergency opening device 1 comprises energy-storing-propelling-means 13 configured for storing a set mechanical elastic energy and for releasing this energy, upon an external-triggering-command imparted for instance by an operator, for propelling the striking rod element 5 towards the above mentioned shifting mechanism so as to impart to the latter the opening striking force which is required for moving with the proper speed the movable contacts.
  • the energy-storing-propelling-means 13 are configured for imparting to the striking rod element 5 a rectilinear snap movement, along the operating direction 6, having one or more kinematic parameters which are independent from the external-triggering-command.
  • the kinematic parameters comprise the speed at which the striking rod element 5 is moved.
  • a further kinematic parameter comprises the acceleration imparted to the striking rod element 5.
  • the energy-storing-propelling-means in the embodiment here described, comprise a compression spring 13 positioned around the stem portion 9 and interposed between the flange-portion 10 and a resting sleeve element 14.
  • the resting sleeve element 14 is placed inside the first guiding-housing part 3 in a stationary position at an end opposite to the internal stop surface 12.
  • An axial opening is obtained in the resting sleeve element 14 trough which the striking-rod-element 5 is relatively and coaxially slidable.
  • the flange-portion 10 is configured for being movable inside the first guiding housing 3 from a first position, in which the compression spring 13 is in a loaded, i.e. compressed, configuration, and a second position in which the flange-portion 10 abuts against the internal stop surface 12 when the compression spring 13 is in a, at least partially, released configuration.
  • the mechanical elastic energy stored in the compression spring 13 inside the first-guiding-housing 3 - which thus acts as an energy-storing-chamber - is intended to be transformed in a rather impulsive fast movement of the striking rod element 5.
  • the properties/features of the compression spring 13 and of the striking rod element 5, e.g. physical, mechanical, geometrical, such as material, dimensions, stiffness, number of turns, are chosen so as to obtain a movement of the striking rod element 5 with desired prefixed kinematic parameters, such as speed, acceleration, and preferably they are repeatedly constant during service life.
  • the rectilinear snap movement of the striking rod element 5 is always the same and is totally independent from the manual actuation speed of the operator which handles the emergency opening device 1, and preferably is substantially the same.
  • the emergency opening device 1 comprises a retaining-triggering-unit 18 configured for retaining the compression spring 13 in the loaded compressed configuration and for leaving the compression spring 13 expand when the operator imparts an external-triggering-command for generating the above mentioned rectilinear snap movement.
  • the retaining-triggering-unit 18 is partly housed in the retaining-release-chamber 16 defined by the second guiding-housing part 4.
  • the retaining-triggering-unit 18 comprises a push pin element 19 extending and movable along a pushing direction 20, transversely to the longitudinal axis 11.
  • the push pin element 19 is movable from a retaining position, in which it holds the striking rod element 5 in the loaded compressed configuration, and a releasing position, in which it releases the striking rod element thus allowing the snap movement thereof.
  • An engaging opening 21 is obtained in the push pin element 19, through which a retainable portion 25 of the striking rod element 5, in particular of the second rod part 8, passes through and is relatively movable along the longitudinal axis 11.
  • the retaining-triggering-unit 18 comprises a retaining spring 23 which is placed around the push pin element 19 and interposed between the second guiding-housing part 4 and a push-head 24 of the push pin element 19.
  • the retaining spring 23 is of the compression type and acts for urging the push-head 24 away from the second guiding-housing part 4, in particular tends to keep the push pin element 19 in the retaining position.
  • a retaining part 22 which delimits the engaging opening 21.
  • the retaining part 22 is shaped for engaging with an engaging groove 26 which is obtained on the retainable portion 25.
  • the engaging groove 26 is obtained transversely around the striking rod element 5, as shown in Figures 6 and 3 .
  • the retaining part 22 of the push pin element 19 engages with the engaging groove 26.
  • a stable coupling of the engaging groove 26 with the retaining part 22 is guaranteed by the urging action of the retaining spring 23, which tends to project the push pin element 19 out of the retaining-release chamber 16, thus pressing the retaining part 22 against and inside the engaging groove 26.
  • the striking rod element 5 is kept blocked and the compression spring 13 is not allowed to expand. Expansion of the compression spring 13, and therefore a snap movement of the striking rod element 5, is enabled only upon an external triggering command, i.e. when the operator pushes the push pin element 19 in the pushing direction 20, thus disengaging the retaining part 22 from the engaging groove 26. In this way the striking rod element 5 is released and left free to move under the action of the compression spring 13.
  • the snap movement of the striking rod is clearly independent from the manual external triggering command exerted by the operator on the retaining-triggering-unit 18, the snap movement being determined by the elastic features of the compression spring 13.
  • the operator may grasp the handle portion 17, lean a tip 28 of the striking rod element 5 against a fixed surface, for example against the floor, and press against the floor so as to introduce the first rod part 7 inside the first guiding housing part 3, thus compressing the compression spring 13.
  • the engaging groove 26 reaches the engaging opening 21 of the retaining-triggering-unit 18, the push pin element 19, under the action of the retaining spring 18, leaps to the retaining position and the retaining part 22 enters the engaging groove 26 and blocks the striking rod element 5. In this way, the emergency opening device 1 is ready to work.
  • connection-socket opening 29 The operator may insert the tip 28 and a front end portion of the guiding-housing 2 inside an apposite connection-socket opening 29 which is provided on the casing of the switchgear.
  • the connection-socket opening 29 can be shaped as a receiving-bush-element.
  • the connection-socket 29 is mounted on a door 30 of a switchgear-casing, as shown in figures 7 and 8 .
  • the emergency opening device 1 can be connected to connection-socket 29 and can be operated when the door 30 is in a closed position, so as to enable the striking rod element 5 to reach the shifting mechanism of the electromagnetic actuator associated to the contactor which is housed in the casing. At this point, the operator can push the push pin element 19 for causing the opening of the electrical contacts of the contactor, and subsequently may remove the emergency opening device 1 e put it away.
  • the emergency opening device 1 may comprise suitable temporary coupling means.
  • the temporary coupling means may comprise a threaded coupling portion provided on the front end of the first guiding housing part 3, shaped for coupling with a corresponding threaded zone suitably provided on the connection-socket 29 on the door 30.
  • the temporary coupling means comprise a bayonet joint, including a first bayonet portion 31 which is fixed to the guiding housing 2 and is shaped for removably engaging with a stationary second bayonet portion 32 to be permanently provided on the connection socket 29.
  • Other forms of temporary connection can be provided, for example a snap-quick-connection etc.
  • the emergency opening device 1 can be provided with a removable extension element 33 (shown in Figure 9 ) which is connectable to the front end portion of guiding-housing 2.
  • the first bayonet portion 31 or other temporary coupling element can be connected to the front end portion of the removable extension element 33.
  • the removable extension element 33 allows the operator to perform some tests on the contactor.
  • the emergency opening device 1 can operate when the contactor, supported by a slidable trolley, is pulled in a non-operative-extracted position in the casing of the switchgear.
  • the removable extension element 33 acts as a spacing element and adjusts the correct relative position of the striking rod element 5 with respect to the shifting mechanism of the electromagnetic actuator provided on the contactor which is in the non-operative-extracted position. It has been described how, owing to the emergency opening device 1 of the disclosure, the intended aim of providing a simple and effective technical solution enabling to reliably open a switching device also in "on load” conditions has been achieved. In particular, the emergency opening device 1 proves to be very useful in connection with old type contactors which otherwise require to switch off the medium voltage before starting a manual opening manoeuvre. Differently from the manual opening device of the prior art, the emergency opening device 1 according to the disclosure is not of an embedded type, but it is of a portable type, which can be handled and used by the operator in emergency situations.
  • the emergency opening device 1 is susceptible of modifications or variations all within the scope of the inventive concept as defined by the appended claims and including any combination of the above described embodiments; any details may be replaced with technically equivalent elements.
  • a pneumatic spring, or a tension spring suitably positioned can be provided, etc.
  • One or more of the elements above described may be differently shaped and/or positioned, can be realized in one or more pieces or differently coupled or positioned, etcetera.
  • the materials may be any according to the requirements and the state of the art.

Landscapes

  • Percussive Tools And Related Accessories (AREA)
  • Breakers (AREA)
EP12164422.3A 2012-04-17 2012-04-17 Dispositif d'ouverture d'urgence Withdrawn EP2654056A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12164422.3A EP2654056A1 (fr) 2012-04-17 2012-04-17 Dispositif d'ouverture d'urgence
AU2013248585A AU2013248585A1 (en) 2012-04-17 2013-02-25 Emergency opening device
PCT/EP2013/053664 WO2013156186A1 (fr) 2012-04-17 2013-02-25 Dispositif d'ouverture d'urgence
CN201380020606.5A CN104246944B (zh) 2012-04-17 2013-02-25 紧急断开装置、紧急断开套件及开关柜设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12164422.3A EP2654056A1 (fr) 2012-04-17 2012-04-17 Dispositif d'ouverture d'urgence

Publications (1)

Publication Number Publication Date
EP2654056A1 true EP2654056A1 (fr) 2013-10-23

Family

ID=47748631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12164422.3A Withdrawn EP2654056A1 (fr) 2012-04-17 2012-04-17 Dispositif d'ouverture d'urgence

Country Status (4)

Country Link
EP (1) EP2654056A1 (fr)
CN (1) CN104246944B (fr)
AU (1) AU2013248585A1 (fr)
WO (1) WO2013156186A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102076267B1 (ko) * 2017-02-21 2020-02-12 에이피시스템 주식회사 비상정지 장치 및 방법
IT201800002034U1 (it) * 2018-03-07 2019-09-07 Dispositivo per la caratterizzazione viscoelastica non distruttiva dei materiali dotato di pulsante a scatto
KR102634406B1 (ko) * 2018-12-11 2024-02-06 현대자동차주식회사 전기차 충전 인렛 비상 해제 장치
CN110246720B (zh) * 2019-07-08 2024-05-03 西安旭彤电子科技股份有限公司 一种智能钮子开关

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5512869A (en) * 1993-12-27 1996-04-30 Gec Alsthom T & D Sa Linear control apparatus for a circuit-breaker
EP1583119A2 (fr) * 2004-03-29 2005-10-05 AREVA T&D AG Système de verrouillage pour une commande linéaire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE525735T1 (de) * 2002-10-09 2011-10-15 Areva T & D Sas Freilaufkupplungsanordnung für federantrieb für hochspannungsleistungsschalter
ITBG20030018A1 (it) * 2003-03-07 2004-09-08 Abb Service Srl Interruttore di bassa tensione e relativo dispositivo

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5512869A (en) * 1993-12-27 1996-04-30 Gec Alsthom T & D Sa Linear control apparatus for a circuit-breaker
EP1583119A2 (fr) * 2004-03-29 2005-10-05 AREVA T&D AG Système de verrouillage pour une commande linéaire

Also Published As

Publication number Publication date
CN104246944A (zh) 2014-12-24
WO2013156186A1 (fr) 2013-10-24
CN104246944B (zh) 2016-08-24
AU2013248585A1 (en) 2014-11-27

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