EP1744338B1 - Méchanisme de commande und procédé de commutation pour un appareil de commutation - Google Patents

Méchanisme de commande und procédé de commutation pour un appareil de commutation Download PDF

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Publication number
EP1744338B1
EP1744338B1 EP05106394A EP05106394A EP1744338B1 EP 1744338 B1 EP1744338 B1 EP 1744338B1 EP 05106394 A EP05106394 A EP 05106394A EP 05106394 A EP05106394 A EP 05106394A EP 1744338 B1 EP1744338 B1 EP 1744338B1
Authority
EP
European Patent Office
Prior art keywords
drive mechanism
switchgear
energy
drive
opening
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.)
Revoked
Application number
EP05106394A
Other languages
German (de)
English (en)
Other versions
EP1744338A1 (fr
Inventor
Vicenzo Girlando
Antonio Lubello
Roberto Boero
Paulo Tenti
Paolo Mattavelli
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
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Application filed by Siemens AG filed Critical Siemens AG
Priority to EP05106394A priority Critical patent/EP1744338B1/fr
Priority to AT05106394T priority patent/ATE463039T1/de
Priority to DE602005020268T priority patent/DE602005020268D1/de
Publication of EP1744338A1 publication Critical patent/EP1744338A1/fr
Application granted granted Critical
Publication of EP1744338B1 publication Critical patent/EP1744338B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/36—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—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

Definitions

  • the invention is pertaining to a drive mechanism and a method for opening and/or closing of electric switchgear comprising an electric motor for driving at least one moveable contact of the switchgear.
  • HV switchgear e.g. high voltage (HV) switchgear like circuit breaker, disconnector, etc.
  • HV high voltage
  • Conventional drive mechanisms for opening and closing of electric switchgear e.g. high voltage (HV) switchgear like circuit breaker, disconnector, etc.
  • mechanical components like springs, shafts, rods, levers, etc.
  • the closing of the switchgear is often done by closing springs charged by electric motors. Part of the energy of closing springs is also used to charge the opening springs for the next opening operation.
  • Such drive mechanisms exist in various solutions and are well known from prior art.
  • Such mechanical drive mechanisms comprise a large number of single components which results in a complex design and which requires also a complicated presetting of the drive mechanism.
  • Such drives perform always the same motion once it is set and it is not possible to adjust its motion in consequence to particular exterior conditions, e.g. the type of failure causing the switchgear to open or close.
  • a further disadvantage of such drive mechanisms is that it is not possible to implement a control of the switching movement, it is only possible to verify that the drive mechanism has reached the desired end position, e.g. by end position switches.
  • a new generation of drive mechanism comprises an electric servo motor which directly or via a gearbox drives the moveable contact of the switchgear. Examples of such drives are given in EP 1 080 479 A1 and EP 1 092 227 A1 .
  • a further object of the invention is to provide a flexible drive mechanism which is adjustable to the requirements of different events causing switching operations.
  • a drive mechanism wherein an additional source of energy is provided, preferably a spring or a hydraulic or pneumatic cylinder, for supporting the electric motor in driving the moveable contact at least during part of the opening or closing motion.
  • an additional source of energy for opening and/or closing the switchgear a smaller motor can be chosen and/or a faster acceleration of the masses to be moved can be reached.
  • such a drive mechanism is capable to keep the switchgear open and/or closed and to perform an emergency opening/closing (although with restricted speed) even in case of a fault of the motor or its power supply by means of the additional source of energy.
  • the flexibility of the drive mechanism is increased and the reliability of the drive mechanism, which is a very important aspect for such devices, is improved significantly.
  • the additional source of energy is according to the invention arranged to support the electric motor during the beginning of the opening and/or closing operation, i.e. during the phase of motion most energy is needed to accelerate the masses to be moved and the motor is burdened most.
  • An advantageous embodiment of the inventive drive mechanism comprises a drive lever connected to a shaft or actuator of the electric motor and an additional source of energy connected to a first end of the drive lever in a distance from the centre of rotation and a drive member
  • the drive member is connected to the moveable contact of the actuating device and is connected to a second end of the drive lever in a distance from the centre of rotation.
  • An alternative advantageous embodiment comprises a linear electric motor and an additional source of energy both connected to the drive member.
  • Fig. 1 schematically shows a HV switchgear 1, e.g. a circuit breaker, with two moveable contacts 6, 8 and an inventive drive mechanism 2.
  • the first moveable contact 6 is connected to a drive member 5, here a drive rod, which is actuated by the drive mechanism 2.
  • the driving motion is transferred from the first moveable contact 6 to the second moveable contact 8 by a motion transfer mechanism 15, e.g. comprising levers and a non-linear profile cam 7 which is connected to the second moveable contact 8.
  • a motion transfer mechanism 15 e.g. comprising levers and a non-linear profile cam 7 which is connected to the second moveable contact 8.
  • a switchgear is described in EP 1 211 706 A1 of the Applicant and forms part of the disclosure of the current application. But it is to be pointed out that the inventive drive mechanism can be applied to any switchgear 1 and especially also to switchgear 1 with only one moveable contact 6 as indicated in Fig. 2
  • the inventive drive mechanism 2 comprises an electric motor 12, e.g. a servo motor, which drives the drive mechanism 2 and which is supplied with electric energy by a capacitor or capacitor bank 9.
  • control unit 11 may include a control member, like e.g. a microprocessor-based or computer-based unit, and a power unit, like e.g. a well known power electronics converter unit.
  • a position sensor 13 may provide the current position of the motor 12 and consequently also of the drive mechanism 2 to the control unit 11.
  • the motor shaft 14 (only schematically indicated in Fig. 1 and 2 ) is connected to and drives a drive lever 4.
  • the motor shaft 14 defines the centre of rotation of the drive shaft 4 which is located between the two ends of the drive lever 4.
  • One end of the drive lever 4 is connected to the drive rod 5, hence driving the drive rod 5, and the other end is connected to an additional source of energy for supporting the electric motor 12 in driving the drive mechanism 2, in the embodiment shown a spring 3, here a coil spring, thus forming two lever arms with lengths I 1 and I 2 .
  • a source of energy for driving the drive mechanism 2 in the context of the present invention is a device which can actively generate a force or torque acting on the drive mechanism 2 in order to drive the drive mechanism 2.
  • a source of energy can be a mechanical device, like a spring 3 or a single or double acting hydraulic or pneumatic cylinder 21 or a cylinder filled with compressed gas, or a electrical or electro-mechanical device, like an electric motor, an electromagnet or a linear motor.
  • Gravitational forces are typically passive forces and are not a source of energy in the sense of this invention.
  • the spring 3 as additional source of energy in the example shown in Fig. 1 is arranged between two spring rods 16, 18 which can be moved relative to each other.
  • One spring rod 18 is rotatably mounted on one of its ends and is connected to the spring 3 at its other end.
  • the second spring rod 16 is at one of its ends rotatably connected to the drive lever 4 at distance I 1 from the centre of rotation and is connected to the spring 3 at its other end.
  • the cylinder could be rotatably mounted and its piston, which is driven by the expanding gas, could be connected to the drive lever 4 in a distance I 1 from the centre of rotation. Also other sources of energy could be connected to the drive rod 5 or drive lever 4 with its actuating part and would be mounted on another part.
  • a linear motor connected to the drive lever 4 in a distance I 1 from the centre of rotation or connected to the drive rod 5 instead of a rotational electric motor 12 could of course also be employed just as well.
  • the switchgear 1 has a moveable contact 6 connected to a drive member 5 driven by a drive mechanism 2.
  • the actuator 20 of a linear electric motor 22 is connected to the drive member 5 and drives the moveable contact 6 of the switchgear 1.
  • An additional source of energy here a hydraulic or pneumatic cylinder 21, is also connected to the drive member 5 thus supporting the linear electric motor 22 in driving the moveable contact 6 of the switchgear.
  • a position sensor 13 may provide the position of the linear motor 22 and consequently also of the drive mechanism 2 to the control unit 11.
  • the arrangement of the single components of the drive mechanism 2 may of course be different from that shown in Fig. 3 .
  • the drive mechanism 2 For closing the open switchgear 1 of Fig. 1 the motor 12 is actuated by the control unit 11 which causes the drive lever 4 to turn (in this particular embodiment) counter-clockwise. Simultaneously, the drive member 5 and consequently also the first moveable contact 6 are moved toward the second contact 8. In case of a double acting drive mechanism, the second moveable contact 8 moves also towards the first moveable contact 6 according to the profile defined by the non-linear profile cam 7.
  • the spring 3 is simultaneously tensed by the relative movement of the spring rods 16, 18 and stores the tensioning energy until it is released again.
  • the electric motor 12 must provide the energy for moving the mechanical parts of the switchgear 1 (i.e. the moveable masses of the switchgear 1 and drive mechanism 2) and (at least for part of the movement) also for tensioning the spring 3.
  • the drive mechanism 2 is advantageously mechanically locked after the final position is reached, e.g. by latching the driving mechanism 2 using suitable mechanical or electro-mechanical latching means, in order to avoid the accidental expansion of the spring 3 if the power supply of the motor 12 is switched off.
  • an external event e.g.
  • the drive mechanism 2 is unlocked (if locked before) and the control unit 11 actuates motor 12 to turn (in this particular embodiment) clockwise.
  • the unlocking of the drive mechanism 2 causes the spring 3 to expand immediately and to release its stored energy thus supporting the motor 12 in driving the two moveable contacts 6, 8 or the single moveable contact 6 at least during the beginning of the switching motion, i.e. during the phase of motion when a high torque is required to accelerate the moveable masses of the mechanical parts of the drive mechanism 2 and switchgear 1 in short time.
  • the linear motor 22 For closing the open switchgear 1 of Fig. 3 the linear motor 22 would of course be actuated such to move the moveable contact 6 towards the second moveable or fixed contact.
  • the hydraulic or pneumatic cylinder 21 would simultaneously be actuated in order to support the linear motor 22 in driving the drive mechanism 2.
  • the linear motor 22 and the hydraulic or pneumatic cylinder 21 could be actuated the other way round.
  • the spring 3 or any other source of energy may be arranged such that it is in its neutral position, i.e. spring 3 totally released with no energy stored, in the final open or closed position of the switchgear 1, which means that spring 3 or any other source of energy would supply energy for the complete opening/closing motion of the switchgear 1.
  • spring 3 or any other source of energy reaches its neutral position during the opening/closing motion.
  • spring 3 or any other source of energy could be released during the first part of the opening/closing motion and tensed during the second part of the opening/closing motion.
  • spring 3 or any other source of energy would support the motor 12 in driving the drive mechanism 2 and switchgear 1 by supplying energy during the beginning of an opening motion, as well as during the beginning of a closing motion because motor 12 would always tense spring 3 at the end of the previous closing or opening motion.
  • a hydraulic or pneumatic cylinder 21 supports the driving movement of the motor 12, 22 only during part of the motion.
  • the position sensor 13 provides the actual position of the drive mechanism 2 to the control unit 11 to allow position control or to detect malfunction of the drive mechanism 2.
  • the electric motor 12, 22, and consequently also the drive mechanism 2 may be operated in feedback or feedforward mode.
  • a closed position control loop may be implemented in the control unit 11 with the position sensor 13 providing the actual position of the drive mechanism 2 and an desired rule of motion defined by the control unit 11.
  • the control unit 11 could control the movement such that the desired rule of motion is followed as accurately as possible. Because of the known geometry of the drive mechanism 2 it would of course also be possible to implement a speed control with the position sensor 13 to achieve a desired speed profile of the moveable contact 6 or the two moveable contacts 6, 8, e.g.
  • the motor 12, 22 is driven by the control unit 11 according to a predefined rule of motion without position feedback, i.e. the motor 12, 22 is started and follows its predefined rule of motion without providing feedback information if the desired speed or motion profile is obeyed.
  • a position sensor 13 may be used in this mode to ensure correct functioning of the drive mechanism 2, e.g. that a required end position is reached.
  • the rule of motion may be adapted in both modes to an external event in order to ensure the best reaction on each possible external event. This allows adaptation of switching behaviour to different operating conditions, thus resulting in optimum synchronization of closing and opening operations related to the network fault conditions and in maximizing the electric life of the switchgear.
  • the control unit 11 may take into consideration also the phase relation between voltage U and current I of the line the switchgear is connected to, to determine the best moment to start an opening or closing operation and/or to determine a suitable rule of motion, as is well known from prior art.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Keying Circuit Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (10)

  1. Mécanisme d'entraînement pour ouvrir et/ou fermer un appareillage ( 1 ) de connexion électrique, comprenant un moteur ( 12 ) électrique pour entraîner au moins un contact ( 6 ) mobile de l'appareillage ( 1 ) de connexion, caractérisé en ce qu'une source supplémentaire d'énergie est fournie par un dispositif ( 3, 21 ) mécanique pour aider le moteur ( 12, 22 ) électrique à entraîner le contact ( 6 ) mobile au moins pendant le début du mouvement d'ouverture et de fermeture et fournit de l'énergie pour le mouvement complet d'ouverture ou de fermeture de l'appareillage ( 1 ) de connexion.
  2. Mécanisme d'entraînement suivant la revendication 1, caractérisé en ce que le dispositif mécanique est un ressort ( 3 ) ou un vérin ( 21 ) hydraulique ou pneumatique ou un vérin à gaz.
  3. Mécanisme d'entraînement suivant la revendication 1 ou 2, caractérisé en ce que le mécanisme d'entraînement comprend un levier ( 4 ) d'entraînement relié à un arbre ou à un actionneur du moteur ( 12 ) électrique.
  4. Mécanisme d'entraînement suivant la revendication 3, caractérisé en ce que le dispositif ( 3, 21 ) mécanique est relié à une première extrémité du levier ( 4 ) d'entraînement à une distance ( 11 ) du centre de rotation.
  5. Mécanisme d'entraînement suivant la revendication 3 ou 4, caractérisé en ce qu'un élément ( 5 ) d'entraînement, qui est relié au contact ( 6 ) mobile de l'appareillage ( 1 ) de connexion électrique, est relié à une deuxième extrémité du levier ( 4 ) d'entraînement à une distance ( 12 ) du centre de rotation.
  6. Mécanisme d'entraînement suivant l'une des revendications 3 à 5, caractérisé en ce que la source supplémentaire d'énergie ( 3 ) est disposée entre les extrémités d'une première et d'une deuxième barres ( 16, 18 ) de ressort, tandis que l'autre extrémité de la première barre ( 16 ) de ressort est reliée au levier ( 4 ) d'entraînement à une distance ( 11 ) du centre de rotation et l'autre extrémité de la deuxième barre ( 18 ) de ressort est montée en rotation et la première et la deuxième barres ( 18 ) de ressort sont disposées de manière à être mobiles l'une par rapport à l'autre.
  7. Mécanisme d'entraînement suivant la revendication 5, caractérisé en ce qu'un actionneur ( 20 ) du moteur ( 22 ) électrique est relié à l'élément ( 5 ) d'entraînement.
  8. Mécanisme d'entraînement suivant la revendication 7, caractérisé en ce que le dispositif ( 3, 21 ) mécanique est relié à l'élément ( 5 ) d'entraînement.
  9. Appareil de connexion électrique ayant au moins un contact mobile qui est entraîné par un mécanisme d'entraînement suivant l'une des revendications 1 à 8.
  10. procédé pour ouvrir et/ou fermer un appareillage ( 1 ) de connexion électrique, dans lequel un moteur ( 12, 22 ) électrique entraîne un contact ( 6 ) de l'appareillage de connexion électrique, caractérisé en ce que le moteur ( 12, 22 ) est aidé par une source supplémentaire d'énergie par un dispositif ( 3, 21 ) mécanique à entraîner le contact ( 6 ) mobile au moins pendant le début du mouvement d'ouverture ou de fermeture, le dispositif mécanique fournissant de l'énergie pour le mouvement complet d'ouverture ou de fermeture de l'appareillage de connexion.
EP05106394A 2005-07-13 2005-07-13 Méchanisme de commande und procédé de commutation pour un appareil de commutation Revoked EP1744338B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05106394A EP1744338B1 (fr) 2005-07-13 2005-07-13 Méchanisme de commande und procédé de commutation pour un appareil de commutation
AT05106394T ATE463039T1 (de) 2005-07-13 2005-07-13 Antriebsmechanismus und schaltverfahren für ein schaltgerät
DE602005020268T DE602005020268D1 (de) 2005-07-13 2005-07-13 Antriebsmechanismus und Schaltverfahren für ein Schaltgerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05106394A EP1744338B1 (fr) 2005-07-13 2005-07-13 Méchanisme de commande und procédé de commutation pour un appareil de commutation

Publications (2)

Publication Number Publication Date
EP1744338A1 EP1744338A1 (fr) 2007-01-17
EP1744338B1 true EP1744338B1 (fr) 2010-03-31

Family

ID=35447746

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Application Number Title Priority Date Filing Date
EP05106394A Revoked EP1744338B1 (fr) 2005-07-13 2005-07-13 Méchanisme de commande und procédé de commutation pour un appareil de commutation

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EP (1) EP1744338B1 (fr)
AT (1) ATE463039T1 (fr)
DE (1) DE602005020268D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101759601B1 (ko) 2015-12-28 2017-07-31 엘에스산전 주식회사 기중 차단기용 지연시간 발생장치
DE102019112710A1 (de) * 2019-05-15 2020-11-19 Maschinenfabrik Reinhausen Gmbh Schalteranordnung mit antriebssystem

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE656480C (de) * 1938-02-07 Siegmund Bauer Dipl Ing Starkstromfernsteuerung fuer den Umkehrbetrieb von Drehstrommotoren
DE912963C (de) * 1940-12-06 1954-06-08 Sachsenwerk Licht & Kraft Ag Durch Hilfsmotor angetriebener elektrischer Schalter mit elektrisch gesteuerter Bremse
FR2666684B1 (fr) * 1990-09-10 1996-08-23 Alsthom Gec Commande de disjoncteur.
US6538347B1 (en) * 1995-05-15 2003-03-25 Mcgraw-Edison Company Electrical switchgear with synchronous control system and actuator
DE69911410D1 (de) 1998-04-03 2003-10-23 Energyline Systems Inc Motorbetätigung für einen luftschalter in einer elektrischen oberleitungsenergieverteilung
ITMI981102A1 (it) 1998-05-19 1999-11-19 Abb Adda S P A Dispositivo di comando e controllo di organi di manovra elettrica
FR2817389B1 (fr) 2000-11-30 2003-01-03 Schneider Electric High Voltag Appareillage de coupure electrique haute tension a double mouvement
JP3861832B2 (ja) * 2003-03-11 2006-12-27 株式会社日立製作所 開閉器
FR2865572B1 (fr) * 2004-01-23 2006-05-26 Alstom T & D Sa Dispositif de commande de dispositif de coupure d'energie electrique
FR2868198B1 (fr) * 2004-03-29 2006-05-19 Areva T & D Ag Systeme de verrouillage pour une commande lineaire

Also Published As

Publication number Publication date
EP1744338A1 (fr) 2007-01-17
ATE463039T1 (de) 2010-04-15
DE602005020268D1 (de) 2010-05-12

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