EP0039096B1 - Commutateur à piston de soufflage - Google Patents

Commutateur à piston de soufflage Download PDF

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Publication number
EP0039096B1
EP0039096B1 EP81200351A EP81200351A EP0039096B1 EP 0039096 B1 EP0039096 B1 EP 0039096B1 EP 81200351 A EP81200351 A EP 81200351A EP 81200351 A EP81200351 A EP 81200351A EP 0039096 B1 EP0039096 B1 EP 0039096B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
switch
movable
fixed
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.)
Expired
Application number
EP81200351A
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German (de)
English (en)
Other versions
EP0039096A2 (fr
EP0039096A3 (en
Inventor
Gerhard Körner
Volkert Dr. Rees
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0039096A2 publication Critical patent/EP0039096A2/fr
Publication of EP0039096A3 publication Critical patent/EP0039096A3/de
Application granted granted Critical
Publication of EP0039096B1 publication Critical patent/EP0039096B1/fr
Expired legal-status Critical Current

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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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/882—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts the movement being assisted by accelerating coils

Definitions

  • the invention relates to a blow piston switch according to the preamble of claim 1.
  • Blow piston switches are electrical circuit breakers in which the gas flow for blowing the arc during a switch-off operation takes place simultaneously with the movement of the movable contact element by pulling a cylinder over a fixed piston, thereby reducing the space inside the cylinder and compressing the gas therein , which is supplied to the arc for its quenching during the further switching-off movement of the separation point and thus the arc.
  • blow piston switches the blow piston or the blow cylinder is driven by an external drive together with the movable contact piece, the drive having to cover the energy required to accelerate the moving masses, to overcome the frictional forces and to compress the extinguishing gas located in the blow cylinder.
  • This requires a correspondingly dimensioned powerful drive, so that its manufacturing costs make up a significant proportion of the total switch costs.
  • the energy of the external drive can be reduced while the circuit breaker has the same breaking capacity by at least partially removing the energy required to generate a gas flow for the arc blowing from the arc itself.
  • An electrical circuit breaker has become known (DE-A-2 349 263), in which an auxiliary arc is drawn outside the compression space of the blow piston switch, which increases the temperature of the gas in its own combustion chamber and thus the pressure, as a result of which the blow piston also has a driving force is accelerated.
  • an auxiliary arc is required, which requires special and suitable contact pieces, which are subject to erosion over time in the same way as the main contact point, so that in the event of a revision, not only the contact point as such, but also the auxiliary contact point must be renewed.
  • Another undesirable side effect in the generation of an extinguishing gas flow is that the extinguishing gas is heated and thus its extinguishing capacity is reduced.
  • the object of the invention is therefore to provide a blow piston switch of the type mentioned, in which a sufficient amount of quenching gas is supplied to the arc to be quenched both in "normal" circuits and in heavy circuits.
  • blow piston switch instead of the physical effect of an increase in pressure due to an increase in temperature (see DE-A-2 349 263) or instead of a staged supply of extinguishing gas, as shown in DD-A-77 527, the electromagnetic force effect of the short-circuit current is used .
  • the first variant can be found in the characterizing features of claims 2 to 4.
  • the outer cylinder is then connected in a fixed position to the fixed piston, against which the movable piston is pulled by the coil spring when it is switched off.
  • the blow cylinder is movable within the outer cylinder relative to this.
  • the coil spring can be connected to the fixed and the movable piston of the second piston-cylinder arrangement by means of clamping pieces or by screwing into thread grooves, the latter having proven to be particularly simple.
  • the helical spring can have a circular or rectangular circular cross section, the surface of the helical spring being provided with insulating material. It is expedient to design the coil spring according to claim 12. Material with a very high electrical conductivity generally has relatively poor suspension properties and the formation of the coil spring with a spring steel core and a corresponding coating combines the advantages of the two materials with one another.
  • the blow piston switch according to FIG. 1 has a tubular fixed contact piece 10 which interacts with a movable switching piece 12 which is also tubular.
  • the movable contact piece 12 covers the fixed contact piece 10, by means of which contact piece overlap a pre-compression in the blow piston switch is effected.
  • a blowing cylinder, also referred to as cylinder 14, is firmly connected to the movable contact piece and is provided at the end of the movable contact piece 12, at which the arc is drawn, with a blowing nozzle 16 made of insulating material, which together with the end of the movable contact piece forms an annular channel 18 which ends in a radial annular gap 20.
  • the cylinder is firmly connected to the movable contact piece 12 by means of mounting webs 22, so that in the event of a switch-off, the movable contact piece 12 can be moved into the switched-off position together with the cylinder 14 and the blowing nozzle 16 (see right side of the center line of FIG. 1 ).
  • the cylinder 14 cooperates with a fixed piston 27, such that the space 28, which is limited by the cylinder, the piston 27, the blowing nozzle 16 and the movable switching element 12, is reduced during a switching operation, as a result of which the gas contained therein is compressed .
  • the piston 27 is provided on its inner and outer periphery with insulating layers 122 and 123.
  • a second piston-cylinder arrangement 30 is arranged concentrically around the cylinder 14 and has a stationary outer cylinder 32 which surrounds the cylinder 14 at a distance therefrom and which is firmly connected to a stationary second piston 34.
  • the outer cylinder 32 there is a movable piston 36, which is provided with an insulating layer 120 on its outer circumference. Inside the cylinder 32 is housed a coil spring 38 which is fixedly connected at one end to the movable piston 36 and at the other end to the fixed piston 34. In the region in which the movement path of the movable piston 36 ends, the cylinder 14 has a passage 40 which communicates with the space 28 through a check valve 42 is connected via the fixed piston 27. This check valve 42 only allows gas flow into space 28 and prevents gas flow out of it.
  • the insulating layer 50 is therefore to be dimensioned such that when the cylinder 14 is switched on, the insulating contacts 50 are in electrically conductive connection with the piston 34 via the sliding contacts 52, whereas in the switching-off position or after a certain distance during the switching-off movement, the insulating layer 50 is directly under the sliding contacts 52 lies (Fig. 1 and 2), so that there the resistance is increased so much that the current flows through the coil spring 38. So that the current does not flow via the movable contact piece 12 or the cylinder 14 to the fixed piston 27, the piston 27 is provided on its inner circumference with an insulating layer 122 and on its outer circumference with an insulating layer 123.
  • the movable piston 36 is also pressed in the direction of arrow A and the space between the movable and the fixed piston 36, 34 is reduced, as a result of which the SF 6 gas located therein is compressed and according to the direction of arrow G through the passage 40 in the movable cylinder 14 the annular space formed between the movable cylinder 14 and the support tube 48 flows into the space 28 via the check valve 42, which opens under pressure of this flow, whereby the gas flow in the arrow direction G merges with the gas flow in the arrow direction F or adds it is and additionally blows the arc 54.
  • This additional gas flow in the direction of arrow G increases the pressure of the gas in the annular gap 20 and, on the other hand, there is the advantage that the blowing of the arc is lengthened, which is also associated with particular advantages.
  • Another advantage is that the pressure of the gas in the annular gap 20 increases due to the current-dependent force action of the coil spring 38 with increasing currents, whereby the intensity of the additional gas flow in the direction of arrow G is increased and the burning between the fixed contact 10 and the movable contact 12 Arc 54 is interrupted. After the arc 54 has been extinguished, the coil spring is de-energized, so that the movable piston 36 returns to its starting position due to the mechanical spring force of the coil spring 38 previously tensioned by the current.
  • Fig. 2 shows the blow piston switch in the off position in the de-energized state after the arc has been extinguished.
  • FIG. 5 is a detailed drawing of the electrical switch. It shows the fixed piston 34, the cylinder 14 and the support tube 48 of the piston. It can be seen that the insulating layer 50 is firmly connected to the cylinder 14, a recess 62 being made in the cylinder 14, into which the insulating layer 50 is inserted.
  • the fixed piston 34 has a recess 64, which is only indicated schematically and which receives the sliding contact 52.
  • an electrical-galvanic connection is effected between the cylinder 14 and the piston 34, which in the event of a switch-off action, cf. 1 right side, is prevented because the insulating layer 50 lies directly under the sliding contact 52.
  • the piston 34 has a cylindrical extension 65, in the outer surface of which the helical spring 38 is fitted with helical grooves 66, so that the individual turns of the helical spring 38 in the Grooves 66 lie and so for a power transmission the fixed piston coil spring.
  • the same arrangement is also provided for the mechanically fixed connection between the movable piston 36 and the coil spring 38.
  • the coil spring 38 can be designed as a cylindrical coil spring with a circular wire cross section. However, the turns can also be formed from wires with a rectangular cross section. Furthermore, in order to optimize the mechanical spring loading, the spring can be designed with a variable pitch or variable wire cross-section per turn.
  • the spring windings located freely in the gas space between the fixed piston 34 and the movable piston 36, i.e. the spring windings that are not attached to the two pistons, are coated on the wire surface with an insulating layer, which prevents the spring from contracting as a result of the electromagnetic force possibly touching turns are electrically short-circuited.
  • the spring can be made from a combination of spring steel with high mechanical strength but low electrical conductivity and a material with high electrical conductivity, such as. B. copper exist.
  • Fig. 6 shows a possible embodiment of the winding cross section of such a spring.
  • a layer 302 of copper is applied to a wire core 301 made of spring steel of high mechanical strength.
  • An electrically insulating layer 303 is located above it.
  • FIG. 3 shows a second piston-cylinder arrangement, the movable piston of which is pulled against the stationary piston by means of a helical spring when the current flows through it is described below.
  • the circuit breaker has a fixed, tubular contact piece 10 which interacts with the movable contact piece 12, the movable contact piece 12 covering the fixed contact piece in order to achieve pre-compression.
  • the cylinder 14 With the movable contact piece 12, the cylinder 14 is connected via mounting webs 22, so that the movable contact piece 12 is moved together with the cylinder 14 in the direction of arrow A during a switch-off operation.
  • the switch also has a fixed piston 68 which, in contrast to the fixed piston 27 in FIG. 1, is not provided with a check valve.
  • the fixed piston 68 is held by a support tube 70 which essentially corresponds to the support tube 48.
  • the fixed piston 68 On its inner circumference, the fixed piston 68 is provided with an insulating layer 125, which electrically isolates it from the movable contact piece 12.
  • the second piston-cylinder assembly 72 is formed by an outer cylinder 74 which is attached to the cylinder 14 at the end opposite the separation point by the outer cylinder 74 having an inwardly flanged flange 76, the free end of which is welded to the cylinder 14 is.
  • the outer cylinder 74 has an inward bend 78 which ends in a nose 80 to which a blowing nozzle 82 is fastened, which practically corresponds to the blowing nozzle 16.
  • This blowing nozzle 82 forms an inflow channel 84 with the movable switching piece, which ends in an annular gap 86, which again corresponds to the annular gap 20 in FIG. 1.
  • the separation point is surrounded by the current supply cylinder 24, which supplies the current to the outer cylinder 74 via the contact fingers 26.
  • the current flow is such that it does not flow via the cylinder 14, but rather via the outer cylinder 74 in the switched-on state. It is therefore supplied to the nose 80 via the current supply cylinder 24 and the contact fingers 26 and flows via the outer cylinder 74 to the cylinder 14 and from there for discharge (not shown further).
  • the current is represented by the dash-dotted line I R (quiescent current).
  • a piston 88 which is mechanically fixedly connected to the inner cylinder 14 and the outer cylinder 74 and which leaves a passage 90 between the cylinder 14 and in which there is a check valve 92, which is connected in such a way that that it only allows gas flow from the annular space formed between the outer cylinder 74 and the cylinder 14 to the inflow channel 84 or the annular gap 86.
  • the fixed piston 88 is electrically insulated from the cylinder 74 with the interposition of an insulating layer 94.
  • the cylinder 14 In the annular space between the cylinder 74 and the cylinder 14 there is a movable piston 96 which, with the interposition of sliding contacts 98, is connected to the cylinder 74 in an electrically conductive manner during the sliding back and forth.
  • the cylinder 14 In its front region, that is to say in the region which is adjacent to the separation point, the cylinder 14 has an electrically conductive region 100 which ends in the region between the fixed and the movable pistons 88 and 96 and in a region 102 made of electrically insulating material passes, whereby in the area of the flange 76 the cylinder 14 again consists of electrically conductive material, area 104.
  • a coil spring 106 provided, one end of which is fixed to the movable piston 96 and the other end of which is fixed to the fixed piston 88.
  • the inner surface of the movable piston 96 is provided with an insulating layer (without reference number).
  • the movable contact piece 12 moves together with the cylinder 14 and the outer cylinder 74 in the direction of arrow A.
  • a current flow is obtained from the fixed contact piece 10 towards the movable contact piece 12, since this is still connected to the fixed contact piece.
  • the current continues to flow via the mounting webs 22 to the area 100 of the cylinder 14 and from there to the fixed piston 88.
  • the current continues to flow via the coil spring 106 to the movable piston 96 and from there via the sliding contacts to the outer cylinder 74 and over the flange 76 to the electrically conductive region 104 and then for discharge.
  • This current flow is marked on the right side of the center line by the dashed line 11, but here the movable contact piece 12 has already separated from the fixed contact piece 10, so that an arc 108 is drawn.
  • the current then flows, similar to that just mentioned, from the fixed contact piece 10 via the arc 108 to the movable contact piece 12, from there via the mounting webs 22 to the area 100 of the cylinder and from there to the fixed piston 88 and via the coil spring 106 to the movable piston 96 and over the outer cylinder 74 to the area 104 and from there for discharge.
  • An insulating layer 125 applied to the inner circumference of the fixed piston 68 prevents the current from flowing via the movable contact piece 12, the piston 68 and the support tube 70 for discharge.
  • a check valve 92 is inserted in the passage 90, which only allows gas to flow from the space between the cylinder 14 and the outer cylinder 74 to the blowing nozzle. This valve inevitably opens whenever the pressure in the space between the cylinder 14 and the outer cylinder 74 is greater than that in the space 28. A reverse flow, which could possibly lead to contamination or ineffectiveness of the additional cylinder arrangement, is not possible .
  • a corresponding check valve 110 in the movable piston 96; this check valve would open when the movable piston 96 returns to its rest position against the direction of arrow B, so that the space between the two pistons 88 and 96 can be filled with gas again.
  • This check valve allows gas flow only into the space between the two pistons 88 and 96.
  • An opening 112 is provided in the flange 76 so that a negative pressure does not arise in the space between the flange 76 and the movable piston 96, which could cancel out the force of the spring.
  • a similar configuration is also useful in the arrangement according to FIG. 1, where a check valve can be inserted either in the fixed piston 34 or in the movable piston 36, so that only the gas enters the space between the cylinder 14 and the piston outer cylinder 32 is made possible.
  • FIG. 4 shows the second variant of the blow piston switch according to FIG. 3 in the switched-off position in the de-energized state after the arc has been extinguished.
  • the movable piston 96 has returned to its initial position in the direction of movement C due to the mechanical spring force of the coil spring 106 previously tensioned by the magnetic force of the current.

Landscapes

  • Circuit Breakers (AREA)

Claims (12)

1. Disjoncteur à piston de soufflage, comportant: une pièce de contact fixe (10) et une pièce de contact mobile (12), au moins cette dernière (12) étant de forme tubulaire; un agencement piston-cylindre (27, 14, 16; 68, 14, 82) solidarisé à la pièce de contact mobile (12) pour obtenir un écoulement de gaz (F) afin de souffler l'arc (54; 108) lorsque le cylindre de soufflage (14, 16) est tiré en direction du piston fixe (27; 68); et un deuxième agencement piston-cylindre (30; 72) avec lequel du gaz d'extinction (G) supplémentaire est amené à l'écoulement de gaz, caractérisé en ce que le deuxième agencement piston-cylindre (30; 72) est constitué par le cylindre des soufflage (14, 16) emboîté sur le piston fixe (27) du premier agencement piston-cylindre (27, 14, 16), et par un cylindre externe (32; 74) entourant le cylindre de soufflage (14, 16), et en ce que dans la chambre de compression du deuxième agencement piston-cylindre (30; 72) est agencé un ressort hélicoïdal (38; 106) actionnable par le courant, prenant un appui fixe par une extrémité et solidarisé par un autre extrémité au piston mobile (36; 96) du deuxième agencement piston-cylindre (30; 72), le courant étant au moins partiellement commuté sur ce ressort lors d'une disjonction.
2. Disjoncteur selon la revendication 1, caractérisé en ce que le ressort hélicoïdal (38) est fixé à une piston fixe (34) du deuxième agencement piston-cylindre, et en ce que ce piston fixe (34) du deuxième agencement piston-cylindre (30) est disposé à poste fixe, conjointement au cylindre externe (32), à l'intérieur du disjoncteur, le cylindre de soufflage (14, 16) étant mobile par rapport au cylindre externe (32) conjointement à la pièce de contact mobile (12), cela dans la direction de disjonction-conjonction.
3. Disjoncteur selon la revendication 1 ou 2, caratérisé en ce qu'une soupape anti-retour (42) n'autorisant un écoulement de gaz que vers le point de coupure est agencée dans le piston fixe (27) du premier agencement piston-cylindre (27, 14, 16).
4. Disjoncteur selon la revendication 2, caractérisé en ce que le cylindre de soufflage (14) est revêtu d'une couche isolante (50) dans la région qui, lors de mouvement de disjonction, glisse à l'intérieur du piston fixe (34) du deuxième agencement piston-cylindre (30), la longueur de cette couche isolante ayant en direction axiale une valeur telle qu'il y ait, en condition de conjonction, une liaison électriquement conductrice entre le cylindre de soufflage (14) et le piston fixe (34) du deuxième agencement piston-cylindre (30), cette liaison étant interrompue après le début de la disjonction, notamment lorsque le cylindre de soufflage (14) conduisant le courant dans la condition de conjonction est dégagé de l'agencement à contact fixe.
5. Disjoncteur selon la revendication 1, caractérisé en ce que le cylindre externe (74) est solidarisé au cylindre de soufflage (14), et en ce que le piston fixe (88) du deuxième agencement piston-cylindre (72) est agencé dans la région du trajet de coupure et est solidarisé au cylindre externe (74), cela avec interposition d'une couche électriquement isolante (94).
6. Disjoncteur selon la revendication 4, caractérisé en ce que le cylindre de soufflage (14) présente des régions en matière électriquement conductrice (100, 104), l'une étant à proximité du point de coupure et l'autre à l'extrémité opposée (104), et présente, entre le piston mobile (96) et le piston fixe (88) du deuxième agencement piston-cylindre (72), une région en matière électriquement isolante (102).
7. Disjoncteur selon la revendication 5. caractérisé en ce que le piston mobile (96) du deuxième agencement piston-cylindre (72) est en liaison électrique, par contact glissant, avec le cylindre externe (74), cela par une couche de contact (98).
8. Disjoncteur selon l'une des revendications 3 à 6, caractérisé en ce qu'il est prévu, dans le piston fixe (88) et dans le piston mobile (96) du deuxième agencement piston-cylindre (72), une soupape anti-retour (92, 110) qui n'autorise un écoulement que vers le point de coupure.
9. Disjoncteur selon l'une des revendications 1 à 8, caractérisé en ce que le piston fixe (27; 68) du premier agencement piston-cylindre (27, 14, 16; 68, 14, 82) est revêtu de matière électriquement isolante (122, 123, 125, 127), cela sur au moins l'une de ses deux surfaces périphériques.
10. Disjoncteur selon l'une des revendications 1 à 9, caractérisé en ce que la pièce de contact mobile (12) n'est que partiellement constituée de matière électriquement conductrice, la région comprise entre les entretoises (22) reliant la pièce de contact mobile (12) au cylindre de soufflage (14) et l'extrémité éloignée du point de coupure étant en une matière électriquement isolante.
11. Disjoncteur selon l'une des revendications 1 à 10, caractérisé par une couche isolante (303) à la surface de celles des spires du ressort hélicoïdal (38; 106) qui ne sont pas en liaison mécanique et électrique avec les pistons fixe et mobile (34, 36; 88, 96) du deuxième agencement piston-cylindre (30; 72).
12. Disjoncteur selon l'une des revendications 1 à 11, caractérisé en ce que le ressort hélicoïdal (38; 106) possède une âme (301) en acier à ressort sur laquelle est appliquée une couche (302) d'un métal ayant une plus grande conductivité électrique.
EP81200351A 1980-04-25 1981-03-30 Commutateur à piston de soufflage Expired EP0039096B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3015946 1980-04-25
DE19803015946 DE3015946A1 (de) 1980-04-25 1980-04-25 Blaskolbenschalter

Publications (3)

Publication Number Publication Date
EP0039096A2 EP0039096A2 (fr) 1981-11-04
EP0039096A3 EP0039096A3 (en) 1982-04-28
EP0039096B1 true EP0039096B1 (fr) 1985-11-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200351A Expired EP0039096B1 (fr) 1980-04-25 1981-03-30 Commutateur à piston de soufflage

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Country Link
US (1) US4438308A (fr)
EP (1) EP0039096B1 (fr)
DE (2) DE3015946A1 (fr)

Families Citing this family (15)

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Publication number Priority date Publication date Assignee Title
EP0061992B1 (fr) * 1981-03-30 1986-11-20 Ernst Slamecka Interrupteur à piston de soufflage pour haute tension
DE3242467C2 (de) * 1982-11-02 1986-06-05 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Autopneumatischer Druckgasschalter
FR2542499B1 (fr) * 1983-03-11 1985-06-28 Alsthom Atlantique Disjoncteur a autosoufflage pneumatique
DE3469098D1 (en) * 1983-11-15 1988-03-03 Sprecher Energie Ag Compressed gas circuit breaker
DE3438635A1 (de) * 1984-09-26 1986-04-03 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
DE4010007A1 (de) * 1990-03-26 1991-10-02 Siemens Ag Druckgasleistungsschalter mit antreibbarem kompressionskolben
FR2704685B1 (fr) * 1993-04-27 1995-06-02 Gec Alsthom T & D Sa Disjoncteur à énergie de manÓoeuvre d'ouverture réduite.
DE4339925A1 (de) * 1993-11-19 1995-05-24 Siemens Ag Elektrischer Druckgasschalter
US6787725B2 (en) * 2002-03-21 2004-09-07 Lg Industrial Systems Co., Ltd. Switching mechanism of circuit breaker for gas insulted switchgear
ATE459973T1 (de) * 2006-01-23 2010-03-15 Abb Technology Ag Schaltkammer für einen gasisolierten hochspannungsschalter
FR2947377B1 (fr) * 2009-06-29 2011-07-22 Areva T & D Sa Valve a clapet de decharge destinee a decharger un gaz dielectrique entre deux volumes d'une chambre de coupure de disjoncteur haute ou moyenne tension
KR101309317B1 (ko) * 2009-09-10 2013-09-30 엘에스산전 주식회사 가스 차단기용 밸브 및 그를 이용한 가스 차단기
FR3030106B1 (fr) * 2014-12-11 2017-01-13 Alstom Technology Ltd Dispositif de coupure electrique haute tension a autosoufflage optimise
CN114068241B (zh) * 2020-08-07 2024-02-27 国家电网有限公司 一种灭弧室及断路器
CN112382890A (zh) * 2020-10-28 2021-02-19 周海梅 一种移动设备专用充电插座

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DE1226682B (de) * 1965-07-08 1966-10-13 Siemens Ag Elektrischer Schalter
GB1140584A (en) * 1966-09-01 1969-01-22 Moog Inc Fluid-pressure servomechanism
DE2025054A1 (de) * 1969-06-16 1971-01-07 VEB Transformatorenwerk Karl Lieb knecht, χ 1160 Berlin Schaltkammer fur elektrische Leistungs schalter nach dem autopneumatischen Prinzip
DE2108871B2 (de) * 1971-02-25 1980-05-29 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Druckgasschalter mit einem geschlossenen Gaskreis
DE2526493A1 (de) * 1975-06-13 1976-12-23 Licentia Gmbh Autopneumatischer druckgasschalter
CH590552A5 (fr) * 1975-09-26 1977-08-15 Sprecher & Schuh Ag
CH594977A5 (fr) * 1976-03-29 1978-01-31 Bbc Brown Boveri & Cie
CH618287A5 (en) * 1977-07-26 1980-07-15 Sprecher & Schuh Ag Gas-blast circuit breaker
DE2911414A1 (de) * 1979-03-23 1980-09-25 Licentia Gmbh Autopneumatischer druckgasschalter

Also Published As

Publication number Publication date
EP0039096A2 (fr) 1981-11-04
DE3172868D1 (en) 1985-12-19
EP0039096A3 (en) 1982-04-28
US4438308A (en) 1984-03-20
DE3015946A1 (de) 1981-10-29

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