EP1930928B1 - Agencement d'entraînement à contact - Google Patents

Agencement d'entraînement à contact Download PDF

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Publication number
EP1930928B1
EP1930928B1 EP07021677A EP07021677A EP1930928B1 EP 1930928 B1 EP1930928 B1 EP 1930928B1 EP 07021677 A EP07021677 A EP 07021677A EP 07021677 A EP07021677 A EP 07021677A EP 1930928 B1 EP1930928 B1 EP 1930928B1
Authority
EP
European Patent Office
Prior art keywords
contact
drive
delay
arrangement according
contact drive
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.)
Not-in-force
Application number
EP07021677A
Other languages
German (de)
English (en)
Other versions
EP1930928A2 (fr
EP1930928A3 (fr
Inventor
Henrik Dr.-Ing. Lohrberg
Joachim Eggers
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
Publication of EP1930928A2 publication Critical patent/EP1930928A2/fr
Publication of EP1930928A3 publication Critical patent/EP1930928A3/fr
Application granted granted Critical
Publication of EP1930928B1 publication Critical patent/EP1930928B1/fr
Not-in-force 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
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • 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
    • H01H2003/3094—Power arrangements internal to the switch for operating the driving mechanism using spring motor allowing an opening - closing - opening [OCO] sequence

Definitions

  • the invention relates to a contact drive arrangement for moving at least one contact in Hochnapssschaltanlägen according to the preamble of claim 1.
  • a contact drive arrangement is eg in US 3,379,849 A disclosed.
  • High-voltage switchgear in particular gas-insulated high-voltage switchgear (GIS) are well known and have been used for many years in the voltage range of about 7.2 kV to 800 kV.
  • the GIS are usually executed in block technology.
  • Plant components, such as busbars, circuit breakers, circuit breakers, converters optionally with cable terminations and connecting elements are designed as gas-tight encapsulated modules.
  • the insulating gas is usually sulfur hexafluoride (SF 6 ), but other gases are used.
  • switchgear and drives are required to move, for example, electrical contacts in disconnectors, switches, etc., to ensure the proper operation of such a system.
  • hydromechanical drives are used inter alia to make the movement of electrical contacts in different switching sequences.
  • One of these switching sequences is the so-called CO-circuit, which includes switching on with a subsequent switch-off of a switch.
  • This switching sequence is caused on the drive side by an auxiliary switch, which usually several Having contacts that close or open depending on a drive position of the switch.
  • the signal for the switch-off signal is already given when switching on, but the corresponding circuit remains interrupted by the auxiliary switch until the drive has almost reached the switch-on position.
  • the contact drive arrangement according to the invention of the type mentioned above is characterized in that a delay drive is functionally connected in parallel with the contact drive, that the delay drive cooperates with a second auxiliary contact, that the first and the second auxiliary contact are electrically connected in series, that the delay drive is a damping element has, and that is extended by the damping element, the time period for a switching action in comparison to the time period for a switching operation with the contact drive.
  • An advantage of the arrangement according to the invention is that a delay of the switching operations is achieved by the parallel connection of a delay drive to the contact drive, without having to make direct intervention in the contact drive itself. Such an immediate intervention in the speed of the switching operations of the contact would, for example, a corresponding electrical or electronic control, which is often unacceptable for safety reasons.
  • a parallel connection of the Delay drive avoids such a direct intervention and at the same time represents a possibility via the damping element to adapt the time span until both auxiliary contacts are closed to a predetermined value in a particularly simple manner. With such a delayed circuit any desired switching sequence can be realized easily.
  • the delay drive can be designed as an electric or pneumatic drive. A particular advantage, however, arises when the contact drive is a hydromechanical drive.
  • the contact drive is a hydromechanical, so that the subsequent installation of a delay drive or the planning of a contact drive arrangement in the inventive manner is particularly simple.
  • the existing hydraulic systems for the contact drive can then be used in a particularly simple manner for the deceleration drive.
  • a particularly compact embodiment of the subject invention is achieved by the use of a differential piston cylinder as a hydraulic drive.
  • a hydraulic delay drive advantageously also contains a hydraulic damping element, which is characterized in that the hydraulic damping element has a predetermined amount independent of the control medium on a liquid damping medium in a predetermined damping volume, that a diaphragm subdivides the predetermined volume, and that in the activation case, the damping medium via the diaphragm passes from one part to another part of the damping volume.
  • FIG. 1 shows a circuit diagram 10 with an auxiliary switch 12, which has a first 14 and a second auxiliary contact 16.
  • a contact drive 18 is shown, which is on the one hand connected to the first auxiliary contact 14 and on the other hand drives a, but not shown in this figure, electrical contact of a high voltage switch.
  • the contact drive 18 is a hydromechanical, which is represented by the cylinder-piston arrangement as a symbol for the contact drive 18.
  • the contact drive 18 is supplied via a control pressure line 20 with control medium Z, while the control medium Z, in particular a control oil, flows back via a drainage line 22 into a Steuermediurnniklauf not shown here.
  • FIG. 1 shows both auxiliary contacts 14, 16 in the open position. If, for example, the contact drive 18 is activated so that it closes, it is ensured by the connection between the contact drive 18 and the first auxiliary contact 14 that this too is closed. Nevertheless, the second auxiliary contact 16 is still open, so that a signal flow from a signaling side 24 to a signal-receiving side 26 on the auxiliary switch 12 is not yet guaranteed.
  • the second auxiliary contact 16 is namely driven separately, for example, electrically or pneumatically, so that it is independent of the contact drive 18 can be closed. This is done via a damping element, which may be, for example, electric, pneumatic or hydraulic. The detailed embodiment is not shown in this figure.
  • FIG. 2 shows a delay drive 30 in a schematic representation, which is designed as a hydraulic drive and acts on a delay contact 32 of a second auxiliary switch 34.
  • the second auxiliary switch 34 is also a Auxiliary switch contact 36 shown, which is actuated by a hydraulic contact drive, which is not shown in detail in this figure.
  • a signal is applied to the second auxiliary switch 34 via a tripping coil 38.
  • the signal will arrive only when both the auxiliary switch contact 36 and the delay contact 32 have been brought into a closed position. Both contacts 32, 36 are shown in the figure in their open position.
  • the delay drive 30 has a piston 42 which is guided in a housing 44.
  • the piston 42 is of cylindrical design and is supplied on a first end face 46 by means of a first line 48 with control oil X.
  • a first seal 50 which seals the piston 42 against the housing 44, prevents the control oil X along the lateral surface of the piston 42 to a second end face 52 of the piston 42 passes.
  • a trigger element 54 is arranged, which acts on the delay contact 32. Now, if the control oil pressure of the first line 48 is increased, the piston 42 and with it the trigger member 54 moves in the direction of the delay contact 32, which is spent after a certain time from its open position to its closed position.
  • the time required for this depends on the distance to be covered by the trigger element until it has closed the delay contact 32 and a pressure difference between the control oil pressure on the first end face 46 and a damping oil pressure in a damping volume 56 on the second end face 52.
  • this damping volume 56 moves certain cylindrical portion 58 of the piston 42 according to the prevailing pressure conditions back or forth, wherein the cylinder portion 58 has a larger diameter than the remaining part of the piston 42.
  • an annular end-face area 60 remains on the side facing away from the second end face 52 of the cylinder portion 58th to which a second line 62 is connected.
  • This line is connected at its other side with the damping volume 56 on the side of the second end face 52.
  • the damping oil can communicate within the damping volume 56 via the second line 62 from one end face of the cylinder portion 58 with the other end face.
  • a shutter 64 is arranged in the second line 62.
  • the orifice 64 has the task, in the case of the movement of the piston 42 in one or the other direction to limit the flow through the second conduit 62 and to build up a certain pressure.
  • the size of the aperture diameter determines the speed or pressure with which the damping oil volume passes from one end face to the other end face of the cylinder portion 58. In this way, the damping of the delay drive 30 can be adjusted by a suitable choice of the aperture in a particularly simple manner.
  • the illustrated delay drive is an implementation of the differential piston principle.
  • a third line 66 is connected to the second line 62, wherein the third line 66, the pressure in the damping oil P, either increased, which causes a slower operating speed of the piston 42, or the pressure is lowered, which in turn a faster operating speed of Piston 42 result. Also in this way, the damping behavior or the operating speed of the piston 42 can be changed in a particularly simple manner.
  • a rod 68 is connected to the first end face 46 of the piston 42 and in turn sealed with a second seal 70 against the housing 44 against oil leakage of control oil X.
  • an adjusting 72 On a free end face of the rod 68 acts an adjusting 72, which is not shown in detail. In a simple embodiment, this can be a hand-adjustable adjusting device, such as a screw. But it is also within the spirit of the invention here to provide a drive or other measures for adjustment. In any case, the total stroke of the piston 42 and thus the time between the start of movement and contact via the adjusting 72 will be adjustable.
  • the adjustment of the time until the delay contact 32 closes can be adjusted particularly precisely by the fact that it is designed as a bistable contact. For the contact, this means that it is automatically moved to its closed position at a design-dictated switching point and, accordingly, a specific switching point and the associated switching time can be predicted with particular accuracy. Accordingly, the stroke of the piston 42 can be adjusted via the adjusting device to this switching point.
  • Another advantage of using a predefined damping volume 56 is that it is largely independent of the temperature at which the system operates.
  • the control oil X required to supply the delay drive is comparatively small and can easily be taken from an existing control oil supply, for example that of the contact drive.
  • the supply of damping oil can in principle be taken over by an existing control oil supply. It is advantageous, however, to provide a separate damping volume with separate damping oil, especially when no adjustment via the damping oil pressure is desired. In this way, it is namely possible by appropriate design of the diaphragm 64, the volume flow of damping oil, which moves over the aperture 64, designed so that the oil in the region of the aperture is in any case in the turbulent flow region, and in this way the pressure drop over the aperture is particularly accurate calculable.
  • the diaphragm diameter In the case of too low Reynolds numbers, ie in the range of a laminar flow, the diaphragm diameter would have to be chosen correspondingly low with a small volume flow over a diaphragm, so that, in particular at low temperatures, such an arrangement possibly entails technical problems. In addition, the influence of manufacturing tolerances is comparatively large when using small apertures.
  • the delay drive 30 shown in this figure has as piston 42 a so-called double differential piston.
  • the effective area of the piston results from the difference between two pressure-effective end faces of the cylindrical Piston 42. In this way, the required damping volume 56 can be sized comparatively small.
  • Another way to set the delay time to close the delay contact is that the delay contact initially performs a so-called idle stroke. During the idle stroke, the piston 42 is reciprocated once, but only in such a way that the delay contact 32 does not close. Due to the time required for the idle stroke, the permitted speed of the piston as a whole is increased and the effects of manufacturing tolerances of the parts of the delay contact or of the delay drive on the switching time are reduced.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Keying Circuit Devices (AREA)

Claims (10)

  1. Agencement d'entraînement de contact pour le déplacement d'au moins un contact dans des installations de couplage à haute tension avec au moins un entraînement de contact et avec un interrupteur auxiliaire, qui présente au moins deux contacts auxiliaires, dans lequel l'entraînement de contact coopère avec ledit au moins un contact et avec un premier contact auxiliaire, caractérisé en ce qu'une commande de temporisation est montée fonctionnellement en parallèle avec l'entraînement de contact, en ce que la commande de temporisation coopère avec un deuxième contact auxiliaire, en ce que le premier et le deuxième contacts auxiliaires sont raccordés électriquement en série, en ce que la commande de temporisation présente un élément d'amortissement, et en ce que, du fait de l'élément d'amortissement, le temps nécessaire pour une manoeuvre de couplage est prolongé par comparaison avec le temps nécessaire pour une manoeuvre de couplage avec l'entraînement de contact.
  2. Agencement d'entraînement de contact selon la revendication 1, caractérisé en ce que l'entraînement de contact est un entraînement hydromécanique.
  3. Agencement d'entraînement de contact selon la revendication 1 ou 2, caractérisé en ce que la commande de temporisation est une commande électrique ou pneumatique.
  4. Agencement d'entraînement de contact selon la revendication 1 ou 2, caractérisé en ce que la commande de temporisation est une commande hydraulique, en particulier avec un cylindre à piston différentiel.
  5. Agencement d'entraînement de contact selon la revendication 4, caractérisé en ce que l'entraînement de contact et la commande de temporisation sont des composants différents ou sont disposés dans un module.
  6. Agencement d'entraînement de contact selon la revendication 4 ou 5, caractérisé en ce que l'entraînement de contact et la commande de temporisation peuvent être actionnés par la même source de pression de commande.
  7. Agencement d'entraînement de contact selon l'une quelconque des revendications 4 à 6, caractérisé en ce que l'élément d'amortissement hydraulique présente une quantité prédéterminée d'un fluide d'amortissement liquide, indépendante du fluide de commande, dans un volume d'amortissement prédéterminé, en ce qu'un diaphragme divise le volume prédéterminé, et en ce que, en cas d'activation, le fluide d'amortissement ne passe d'une partie dans l'autre partie du volume d'amortissement que via le diaphragme.
  8. Agencement d'entraînement de contact selon l'une quelconque des revendications précédentes, caractérisé en ce que les contacts auxiliaires sont des contacts bistables.
  9. Agencement d'entraînement de contact selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un temps de temporisation du contact de temporisation est réglable.
  10. Agencement d'entraînement de contact selon l'une quelconque des revendications précédentes, caractérisé en ce que l'entraînement de contact présente un piston, qui est constitué par un piston différentiel.
EP07021677A 2006-12-07 2007-11-08 Agencement d'entraînement à contact Not-in-force EP1930928B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006058042A DE102006058042A1 (de) 2006-12-07 2006-12-07 Kontaktantriebsanordnung

Publications (3)

Publication Number Publication Date
EP1930928A2 EP1930928A2 (fr) 2008-06-11
EP1930928A3 EP1930928A3 (fr) 2009-09-23
EP1930928B1 true EP1930928B1 (fr) 2012-01-04

Family

ID=39157789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07021677A Not-in-force EP1930928B1 (fr) 2006-12-07 2007-11-08 Agencement d'entraînement à contact

Country Status (5)

Country Link
US (1) US7652221B2 (fr)
EP (1) EP1930928B1 (fr)
CN (1) CN101226845B (fr)
AT (1) ATE540419T1 (fr)
DE (1) DE102006058042A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061238B4 (de) 2008-12-09 2010-10-28 Abb Technology Ag Vorrichtung für einen hydraulischen Antrieb für eine elektrische Schaltanlage
DE102011109210B3 (de) 2011-08-03 2012-10-11 Abb Technology Ag Differentialzylinder für einen hydromechanischen Antrieb für elektrische Leistungsschalter
DE102011109227B3 (de) * 2011-08-03 2012-11-29 Abb Technology Ag Differentialzylinder für einen hydromechanischen Antrieb für elektrische Leistungsschalter
ES2804613T3 (es) 2014-09-29 2021-02-08 Abb Schweiz Ag Método y dispositivo para monitorizar un interruptor del circuito
DE102016215699A1 (de) 2016-08-22 2018-02-22 Siemens Aktiengesellschaft Vorrichtung und Verfahren zum Schalten von Mittel- und/oder Hochspannungen mit bestimmter Antriebscharakteristik

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902520C (de) * 1943-01-17 1954-01-25 Aeg Fortschalteinrichtung, insbesondere fuer Druckgasschalter
US3379849A (en) * 1964-12-17 1968-04-23 Westinghouse Electric Corp Dual-pressure gas-blast circuit breaker with piston means and interrupting unit in closed tank
FR2662848B2 (fr) * 1990-02-27 1994-07-01 Alsthom Gec Disjoncteur a coupure assistee par varistance.
SE9101831L (sv) * 1991-06-14 1993-03-10 Asea Brown Boveri Saekerhetsbrytare med lutningsindikering
JP2751727B2 (ja) * 1992-04-14 1998-05-18 三菱電機株式会社 遮断器

Also Published As

Publication number Publication date
CN101226845A (zh) 2008-07-23
US20090020508A1 (en) 2009-01-22
EP1930928A2 (fr) 2008-06-11
ATE540419T1 (de) 2012-01-15
EP1930928A3 (fr) 2009-09-23
DE102006058042A1 (de) 2008-06-19
US7652221B2 (en) 2010-01-26
CN101226845B (zh) 2012-08-08

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