EP0039096A2 - Commutateur à piston de soufflage - Google Patents

Commutateur à piston de soufflage Download PDF

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Publication number
EP0039096A2
EP0039096A2 EP81200351A EP81200351A EP0039096A2 EP 0039096 A2 EP0039096 A2 EP 0039096A2 EP 81200351 A EP81200351 A EP 81200351A EP 81200351 A EP81200351 A EP 81200351A EP 0039096 A2 EP0039096 A2 EP 0039096A2
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
fixed
switch according
movable
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
EP81200351A
Other languages
German (de)
English (en)
Other versions
EP0039096A3 (en
EP0039096B1 (fr
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.
  • B piston switches are electrical circuit breakers in which the gas flow to blow 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 the gas contained therein is compressed, 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, in that the energy required to generate a gas flow for the arc blowing is at least partially the arc. itself is removed.
  • An electrical circuit breaker has become known (DE-OS 23 49 263), 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 accelerates with a driving force wjrd.
  • 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.
  • Extinguishing gas flow through an auxiliary arc consists in that the extinguishing gas is heated and its extinguishing capacity is thus reduced.
  • Object of the invention is to provide a puffer of the type mentioned, in which the disadvantages of e b-known devices are avoided.
  • a helical spring is provided, to which the current is at least partially commutated during a switching operation, which helical spring is firmly clamped at one end and is firmly connected at the other end to the movable piston of the additional piston-cylinder arrangement (second movable piston).
  • the current flows essentially via a current-carrying tube from the connection point at which the fixed contact is connected to the connection point which is connected to the movable contact pin or contact piece.
  • the current is commutated to a coil spring due to suitable insulating layers.
  • the first variant can be characterized in that the. Additional piston-cylinder arrangement is formed by the blow cylinder drawn over the fixed piston of the blow piston arrangement (first fixed piston) and an outer cylinder surrounding the blow cylinder, between which the compression space of the additional piston-cylinder arrangement lies.
  • the coil spring may be attached to the fixed piston of the additional piston cylinder assembly (second fixed piston), and the second fixed piston may be fixed with the outer cylinder inside the switch, the blow cylinder relative to the outer cylinder and together with the movable one Switch piece is movable in the opening and closing direction.
  • the blowing cylinder can be covered with an insulating layer in the area that slides in the interior of the second fixed piston during the switching-off movement, the length of the insulating layer being dimensioned in the axial direction in such a way that an electrically conductive connection between the blowing cylinder and given the second fixed piston after the start of the switch-off action and in particular when the blow cylinder, which carries the current in the switched-on state, has come free from the fixed contact arrangement, is nevertheless interrupted.
  • the outer cylinder is firmly connected to the blow cylinder.
  • the blowing cylinder then advantageously has a region made of electrically conductive material in the vicinity of the separation point and at the opposite end, the region which lies between the second movable and the second stationary piston of the additional piston-cylinder arrangement being formed from electrically insulating material.
  • the second fixed piston which lies in the region of the separating distance, can be firmly connected to the outer cylinder with the interposition of an electrically insulating layer. Then the second movable piston of the additional piston-cylinder arrangement is conductively connected to the outer cylinder via a contact layer.
  • a check valve is provided in the fixed piston of the additional piston-cylinder arrangement so that the gas flow can actually flow from the space of the additional piston-cylinder arrangement to the arc in the event of a switch-off action.
  • the second movable piston also has a non-return valve so that this space is again filled with extinguishing gas when switching on. both check valves only allow flow to the point of separation.
  • the fastening of the coil spring in the second fixed and the second movable piston can take place in that helical grooves are introduced in the second fixed and the second movable piston of the additional piston-cylinder arrangement, in which the individual turns of the coil spring for the purpose of a fixed connection of coil springs with the movable and fixed piston are used.
  • the coil spring can have rahtquerrough a circular D; there is of course also the possibility to form the wire cross-section rectangular.
  • the coil spring can consist of spring steel; it can also have a core made of spring steel and a layer of a metal of higher electrical conductivity applied thereon.
  • the coil spring can be wound with a constant pitch, and the winding cross section of the coil spring can also be constant.
  • the blow piston switch acc. 1 has a tubular fixed contact piece 10 which interacts with a likewise movable switching piece 12.
  • 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 cylinder 14 is fixedly connected to the movable contact piece and is provided at the end of the movable contact piece at which the arc is drawn with a blow 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, in the event of a switching operation, the space 28, that of the cylinder, the piston, the blow nozzle 16 and the movable one. Switch piece 12 is limited, is reduced, whereby the gas therein is compressed.
  • the piston 27 is provided on its inner and outer periphery with insulating layers 122 and 123.
  • An additional piston-cylinder arrangement 30 is arranged concentrically around the cylinder 14 and has a further fixed cylinder 32 surrounding the cylinder 14 at a distance from it, which is fixedly connected to a fixed further (second) piston 34.
  • a (second) movable piston 36 which is provided with an insulating layer 120 on its outer circumference.
  • a helical spring 38 which is fixedly connected at one end to the movable piston 36 and at the other end to the fixed piston 34.
  • the cylinder 14 has, in the region in which the movement path of the movable piston 36 ends, a passage 40 which communicates with the space 28 through a check valve 42 via the fixed piston 26. 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 contact plate 52 is in electrically conductive connection with the piston 34, whereas in the switched-off position or after a certain distance during the switching-off movement, the insulating layer 50 is directly under the contact plates 52 lies (Fig.
  • the piston 26 is provided on its inner circumference with an insulating layer 122 and on its outer circumference with an insulating layer 123.
  • the SF 6 gas which is compressed in the space 28, flows through the annular gap 20 in the direction of the arrow F and divides there into a partial flow F 1 and a partial flow F 2 8 due to the path of the electric current through the coil spring 38, the coil spring is compressed in such a way that the turns attract until the turns lie on one another in blocks.
  • Characterized the movable piston 36 is also pressed in the direction of arrow A and the space between the movable and the fixed further piston 34 is reduced, whereby the SF 6 gas located therein is compressed and acc.
  • 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 with increasing currents, whereby the intensity of the additional gas flow G is increased and the arc 54 burning between the fixed contact piece 10 and the movable contact piece 12 is interrupted becomes. 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.
  • Figure 2 shows the blow piston switch in the off position in the de-energized state after the arc has been extinguished.
  • FIG. 5 shows a portion of the electrical switch with the fixed additional piston 34, the cylinder 14 and the support tube 48 of the piston 26. It can be seen that the insulating layer 50 is firmly connected to the cylinder 14, with a recess 62 in the cylinder 14 is attached, in which the insulating layer 50 is inserted.
  • the fixed further piston 34 has a recess 64, which is only indicated schematically and which receives the contact lamella layer 52.
  • the attachment of the coil spring 38 to the fixed piston 34 can also be seen: the piston 34 has a cylindrical extension 65, in the outer surface of the coil spring 38 adapted helical grooves 66 are made, so that the individual turns of the coil spring 38 in the Grooves 66 lie and thus ensure a power transmission of 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.
  • FIG. 6 A further fastening possibility for the helical spring can be seen from FIG. 6.
  • individual turns of the helical spring 38 are introduced into helical grooves 66, which are attached to the cylindrical extension 65 of the fixed piston 34.
  • Clamping pieces 67 are provided on the circumference, into which grooves 69 which are also adapted to the helical spring are incorporated.
  • the clamping pieces 67 are screwed to the piston 34 by means of screws 68 and press on the turns of the coil spring 38 the cylindrical extension 65 of the piston.
  • the helical spring 38 can be designed as a cylindrical helical spring with a circular wire cross section. However, the turns can also be formed from wires with a rectangular cross section.
  • 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 further piston 34 and the movable piston 36, i.e. the spring windings, which are not attached to the two pistons, are provided with an insulating layer on the wire surface, which prevents the spring from contracting as a result the electromagnetic force when touching adjacent spring turns, the 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. 7 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 which isolates them from one another when individual turns are beaten together.
  • FIG. 3 is now a further variant of the invention. described in accordance with the arrangement, in which, however, the basic principle has remained unchanged (in Fig. 3 again the left center line of the switch in the switched-on state is shown to the right of the center line during the switch-off movement.
  • Fig. 4 shows the switch in the switched-off state.
  • an additional piston-cylinder arrangement is provided, the movable piston of which is pulled by means of a helical spring against the fixed additional or further piston when the current flows through it ..
  • the switch is constructed according to FIG.
  • the circuit breaker has a fixed, tubular contact piece 10, which cooperates with the movable contact 12, the movable contact piece 12, the solid K on- clock-piece covers, in order to achieve a pre-compression.
  • the cylinder 14 With the movable contact piece 12, the cylinder 14 is connected via holding webs or support webs 22, so that the movable contact piece 12 is moved together with the cylinder 14 in the direction of arrow A when the switch is turned off.
  • the switch be - further sits a fixed piston 68, which is in contrast to the fixed piston 26 in Figure 1 is not provided with a check valve..
  • the fixed piston 68 is held by a support tube 7o, 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 additional piston-cylinder arrangement 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 with the movable contact piece an inflow channel 84 which ends in an annular gap 86 which corresponds to the annular gap 20 in FIG. 1.
  • the separation point is again 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 gem. 1 so that it does not flow over the cylinder 14, but over the outer cylinder 74 in the switched-on state. It is thus supplied via the power supply cylinder 24 and the contact lamellae 26 to the nose 80 and flows via the outer cylinder 74 to the cylinder 14 and from there for discharge (not further shown) represents).
  • the current is represented by the dash-dotted line IR (quiescent current).
  • a piston 88 which is mechanically fixedly connected to the inner cylinder 14 and the outer cylinder 74 and which leaves between the cylinder 14 and a passage 90 in which there is a check valve 92, which is switched in such a way that it only allows a gas flow from the annular space formed between the outer cylinder 74 and the cylinder 14 to the inner channel 84 or to the annular gap 86.
  • the fixed piston 88 is electrically insulated from the cylinder 74 with the interposition of an insulating layer 94.
  • a movable piston 96 which, with the interposition of a contact lamella 98, is connected to the cylinder 74 in an electrically conductive manner during the sliding back and forth.
  • the cylinder 14 has in its front region, ie in the area adjacent the point of separation, an electrically conductive portion '100 which ends in the region between the fixed and the movable piston 88 and 96 and insulating in a region 102 of electrically 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 is provided, one end of which is connected to the movable piston 96 and the other end of which is fixedly connected to the fixed piston 88.
  • the inner surface of the movable piston 96 is provided with an insulating layer (without reference number).
  • the current continues to flow via the holding 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 98 and from there via the contact lamella to the outer cylinder 74 and via the flange area 76 h to the electrically conductive area 104 and then for discharge.
  • This current flow is marked on the right side of the center line by the dashed line II, 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 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 the 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 according to the arrangement. 1, where a check valve can be used either in the fixed piston 34 or in the movable piston 36, so that only the entry of the gas into the space between the cylinder 14 and the outer cylinder 32 is made possible.

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  • Circuit Breakers (AREA)
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 true EP0039096A2 (fr) 1981-11-04
EP0039096A3 EP0039096A3 (en) 1982-04-28
EP0039096B1 EP0039096B1 (fr) 1985-11-13

Family

ID=6100905

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

Country Status (3)

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061992A3 (en) * 1981-03-30 1983-08-17 Ernst Slamecka High-voltage gas-blast puffer type circuit-breaker
FR2542499A1 (fr) * 1983-03-11 1984-09-14 Alsthom Atlantique Disjoncteur a autosoufflage pneumatique
EP0146671A1 (fr) * 1983-11-15 1985-07-03 Sprecher Energie AG Interrupteur à gaz comprimé
EP0175954A3 (en) * 1984-09-26 1987-04-08 Bbc Aktiengesellschaft Brown, Boveri & Cie. Compressed gas circuit breaker
FR2704685A1 (fr) * 1993-04-27 1994-11-04 Gec Alsthom T & D Sa Disjoncteur à énergie de manÓoeuvre d'ouverture réduite.
EP1811537A1 (fr) 2006-01-23 2007-07-25 ABB Technology AG Chambre de coupure pour un disjoncteur électrique

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3242467C2 (de) * 1982-11-02 1986-06-05 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Autopneumatischer Druckgasschalter
DE4010007A1 (de) * 1990-03-26 1991-10-02 Siemens Ag Druckgasleistungsschalter mit antreibbarem kompressionskolben
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
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

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4237356A (en) 1977-04-13 1980-12-02 Bbc Brown, Boveri & Company Limited Electrical compression switch with contact movement assistor
CH618287A5 (en) * 1977-07-26 1980-07-15 Sprecher & Schuh Ag Gas-blast circuit breaker
US4163131A (en) 1977-08-11 1979-07-31 Westinghouse Electric Corp. Dual-compression gas-blast puffer-type interrupting device
DE2911414A1 (de) * 1979-03-23 1980-09-25 Licentia Gmbh Autopneumatischer druckgasschalter
CH648153A5 (de) 1979-04-24 1985-02-28 Sprecher & Schuh Ag Druckgasschalter.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061992A3 (en) * 1981-03-30 1983-08-17 Ernst Slamecka High-voltage gas-blast puffer type circuit-breaker
FR2542499A1 (fr) * 1983-03-11 1984-09-14 Alsthom Atlantique Disjoncteur a autosoufflage pneumatique
EP0146671A1 (fr) * 1983-11-15 1985-07-03 Sprecher Energie AG Interrupteur à gaz comprimé
US4598188A (en) * 1983-11-15 1986-07-01 Sprecher & Schuh Ag Gas-blast switch
EP0175954A3 (en) * 1984-09-26 1987-04-08 Bbc Aktiengesellschaft Brown, Boveri & Cie. Compressed gas circuit breaker
FR2704685A1 (fr) * 1993-04-27 1994-11-04 Gec Alsthom T & D Sa Disjoncteur à énergie de manÓoeuvre d'ouverture réduite.
EP1811537A1 (fr) 2006-01-23 2007-07-25 ABB Technology AG Chambre de coupure pour un disjoncteur électrique
WO2007082399A1 (fr) * 2006-01-23 2007-07-26 Abb Technology Ag Chambre de coupure pour un disjoncteur à haute tension à isolation gazeuse

Also Published As

Publication number Publication date
US4438308A (en) 1984-03-20
EP0039096A3 (en) 1982-04-28
EP0039096B1 (fr) 1985-11-13
DE3015946A1 (de) 1981-10-29
DE3172868D1 (en) 1985-12-19

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