EP0592338A1 - Mechanismus für einen Erdungsschalter - Google Patents

Mechanismus für einen Erdungsschalter Download PDF

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Publication number
EP0592338A1
EP0592338A1 EP93420392A EP93420392A EP0592338A1 EP 0592338 A1 EP0592338 A1 EP 0592338A1 EP 93420392 A EP93420392 A EP 93420392A EP 93420392 A EP93420392 A EP 93420392A EP 0592338 A1 EP0592338 A1 EP 0592338A1
Authority
EP
European Patent Office
Prior art keywords
disconnector
contact
passage
neutral
switch
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
EP93420392A
Other languages
English (en)
French (fr)
Other versions
EP0592338B1 (de
Inventor
Patrick Bonnardel
Jacques Quenin
Norbert Perrichon
Jean-Louis Sonzogni
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.)
Schneider Electric SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
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 Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0592338A1 publication Critical patent/EP0592338A1/de
Application granted granted Critical
Publication of EP0592338B1 publication Critical patent/EP0592338B1/de
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
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more switches

Definitions

  • the invention is in the field of electrical protection cells, for example for the protection of a medium voltage transformer, comprising a switch or a circuit breaker arranged in series with an earthing switch. It relates more particularly to the opening and closing mechanism of the disconnector, from the operations of the operating member associated with the switch.
  • such a mechanism is a mechanism with neutral passage capable of being coupled, by means of an interlocking mechanism, to the operating member of the switch associated in series with the earthing switch. , so that the operating member of the switch simultaneously controls the opening of the switch and the closing of the earthing switch, respectively the closing of the switch and the opening of the earthing switch.
  • the earthing switch comprises a fixed contact electrically connected to the switch, and a movable contact carried by a rotary contact carrying shaft and connected to earth.
  • the invention aims to remedy the drawback mentioned above, by proposing a particularly reliable and safe mechanism with regard to the electrical protection provided by the cell.
  • the passage of the neutral position of the first mechanism takes place substantially at the end of the travel of the operating member associated with the switch, and the first angular position corresponds to the position of the contact-carrying shaft in the stable open position of the disconnector.
  • the operation of the operating member is said to be “independent”, that is to say that the shaft carrying the rotary contact does not actually start moving until the operating member is almost at the end of the stroke, and therefore the switch is already in the open position.
  • the operation of the operating member is said to be “dependent”, that is to say that the setting in motion of the operating member results directly in a movement of the contact carrier shaft.
  • said first mechanism comprises a first spring attached at one of its ends to a fixed frame and at the other end to a crank which pivots around a fixed axis and which cooperates on the one hand , via a first guide means, with the interlocking mechanism, and on the other hand, via a second guide means, with the contact carrier shaft, the neutral position of the first spring being established when the latter is aligned with the pivot axis of the crank;
  • the second mechanism comprises a second spring attached at one of its ends to a fixed frame, and at the other end to the contact carrier shaft, the neutral point of the second spring being established when the latter is aligned with the axis of rotation of the contact holder shaft.
  • said first mechanism is located at one end of the axis of rotation of the contact carrier shaft, while the second mechanism is located at the other end of said axis of rotation.
  • the protection cell 1 comprises an electrical inlet 2 and an electrical outlet 6. Connected in series between the inlet 2 and the outlet 3, there is for example a switch or a circuit breaker 3 with three positions (closed, open, earthed) with cut-off in SF6 gas, a fuse 4 and an earth disconnector 5.
  • the disconnector 5 conventionally comprises a fixed contact 8 and a movable rotary contact 7.
  • An interlocking mechanism 11 is provided between the operating member 13 of the switch 3 and the opening and closing mechanism of the disconnector 5, so that the drive of the operating member 13 simultaneously controls the opening of the switch 3 and the closing of the disconnector 5, respectively the closing of the switch 3 and the opening of the disconnector 5.
  • the protection cell 1 will comprise three circuits electrical identical to that of Figure 2, arranged in parallel. Such a protection cell is particularly well suited for the protection of medium voltage transformers.
  • FIG. 3 illustrates a three-phase disconnector comprising three fixed contacts 8a, 8b and 8c and three mobile contacts 7a, 7b and 7c, the latter being mounted on a contact-carrying shaft 9, pivotally mounted around an axis 10.
  • the disconnector opening and closing mechanism is coupled to the operating member 13 of the switch 3 by means of a locking rod 11 movable in translation in the direction of its length.
  • One of the ends of the rod 11 carries a connecting rod 12 articulated on the rotary operating member 13 of the switch 3, while the other end carries a guide 11a provided with a rectilinear light 34 arranged parallel to the rod 11 and intended to cooperate with the disconnector mechanism 5.
  • the disconnector mechanism comprises a first 30 and a second 20 mechanisms with neutral passage.
  • the neutral shift mechanism 20 and 30 are located on either side of the axis 10 of rotation of the contact-carrying shaft 9 so as to balance the mobile assembly.
  • the first neutral passage mechanism 30 illustrated in FIGS. 4 to 6, 8, 9 and 11 is supported by a fixed frame 40a on which the axis 10 of the contact-carrying shaft 9 is mounted.
  • the mechanism 30 comprises a crank 32 mounted in rotation about an axis 33 carried by a fixed frame 40a.
  • the crank 32 is equipped with a first roller 35 which cooperates with the rectilinear lumen 34 of the guide 11a, and a second roller 36 which cooperates with a lumen 37 of complex shape, formed in the part 9a of the contact-carrying shaft 9.
  • the crank 32 is biased by a tension spring 31 anchored, on the one hand on the crank 32 at point 31a, and on the other hand on the fixed frame 40a at point 31b.
  • the contact-carrying shaft 9 forms an angle ⁇ with respect to a fixed arbitrary reference, for example the horizontal in the present case.
  • the second mechanism 20 with neutral passage illustrated in FIGS. 7 and 10 comprises a tension spring 21 anchored, on the one hand at point 21a on a bevel gear 9b secured to the contact-carrying shaft 9, and on the other leaves on the fixed chassis 40b at point 21b.
  • the contact-carrying shaft 9 therefore remains stationary. After a certain idle stroke, the operating member 13 being practically at the end of the stroke, the end of the light 34 abuts on the roller 35 and drives the crank 32 in rotation about the axis 33.
  • the spring 31 has passed its neutral position, it becomes a motor and puts the contact-carrying shaft 9 in rotation through the roller 36 and the light 37.
  • the member 13 has reached the end of its travel (Figure 6).
  • the closing of the disconnector 5 is said to be independent, the displacement of the contact-carrying shaft 9 not being directly coupled to the drive of the operating member 13, since it is slightly delayed. It will thus be understood that any foreign body accidentally preventing the closing of the disconnector 5, can in no case prevent the opening of the switch 3.
  • the contact holder shaft 9 can be equipped with an angular position indicator, it will then suffice to check, before any intervention on the installation, that the disconnector 5 is indeed closed.
  • the passage of the neutral point of the spring 31 when the disconnector is closed corresponds to the angular position ⁇ of the contact carrier arm in the open position; however, those skilled in the art will readily understand that this feature is not imperative.
  • the angular position ⁇ of the passage of the neutral point of the spring 21 associated with the mechanism 20 must always be between the angular positions ⁇ and ⁇ of the passages of the neutral point of the spring 31 associated with the mechanism 30, respectively at closing and at opening of the disconnector.
  • the passage of the neutral point of the mechanism 30 precedes the passage of the neutral position of the mechanism 20, whatever the direction of the operation of the control member 13; preferably these three angular positions ⁇ and ⁇ and ⁇ are closer to the open position than to the closed position.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Gas-Insulated Switchgears (AREA)
EP19930420392 1992-10-09 1993-10-04 Mechanismus für einen Erdungsschalter Expired - Lifetime EP0592338B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212276A FR2696869B1 (fr) 1992-10-09 1992-10-09 Mécanisme pour sectionneur de mise à la terre.
FR9212276 1992-10-09

Publications (2)

Publication Number Publication Date
EP0592338A1 true EP0592338A1 (de) 1994-04-13
EP0592338B1 EP0592338B1 (de) 1998-03-04

Family

ID=9434527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420392 Expired - Lifetime EP0592338B1 (de) 1992-10-09 1993-10-04 Mechanismus für einen Erdungsschalter

Country Status (4)

Country Link
EP (1) EP0592338B1 (de)
DE (1) DE69317198T2 (de)
ES (1) ES2114024T3 (de)
FR (1) FR2696869B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924827A1 (de) * 1997-12-19 1999-06-23 Schneider Electric Sa Gasisolierte Mittelspannungsschaltgerätzelle mit erhöhter dielektrischer Festigkeit
EP1617447A1 (de) 2004-07-12 2006-01-18 ABB Technology AG Erdungsschalter
CN102025116A (zh) * 2010-12-17 2011-04-20 安徽鑫龙电器股份有限公司 高压开关设备联锁装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020202689B4 (de) 2020-03-03 2022-06-09 Siemens Aktiengesellschaft Schaltanordnung für Mittelspannung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611677C (de) * 1929-11-27 1935-04-02 Neumann Hochspannungs App G M Verteilungsanlage mit Sammelschienensystem, Schaltvorrichtungen und Erdungsschaltern
US3735073A (en) * 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means
DE2453194A1 (de) * 1974-11-09 1976-05-13 Bbc Brown Boveri & Cie Einschaltsicherer erdungsschalter fuer elektrische schalter
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611677C (de) * 1929-11-27 1935-04-02 Neumann Hochspannungs App G M Verteilungsanlage mit Sammelschienensystem, Schaltvorrichtungen und Erdungsschaltern
US3735073A (en) * 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means
DE2453194A1 (de) * 1974-11-09 1976-05-13 Bbc Brown Boveri & Cie Einschaltsicherer erdungsschalter fuer elektrische schalter
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924827A1 (de) * 1997-12-19 1999-06-23 Schneider Electric Sa Gasisolierte Mittelspannungsschaltgerätzelle mit erhöhter dielektrischer Festigkeit
EP1617447A1 (de) 2004-07-12 2006-01-18 ABB Technology AG Erdungsschalter
CN102025116A (zh) * 2010-12-17 2011-04-20 安徽鑫龙电器股份有限公司 高压开关设备联锁装置
CN102025116B (zh) * 2010-12-17 2012-11-14 安徽鑫龙电器股份有限公司 高压开关设备联锁装置

Also Published As

Publication number Publication date
FR2696869A1 (fr) 1994-04-15
ES2114024T3 (es) 1998-05-16
FR2696869B1 (fr) 1994-12-02
EP0592338B1 (de) 1998-03-04
DE69317198T2 (de) 1998-12-03
DE69317198D1 (de) 1998-04-09

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