EP0173804A1 - Interrupteur à gaz comprimé - Google Patents

Interrupteur à gaz comprimé Download PDF

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Publication number
EP0173804A1
EP0173804A1 EP85107283A EP85107283A EP0173804A1 EP 0173804 A1 EP0173804 A1 EP 0173804A1 EP 85107283 A EP85107283 A EP 85107283A EP 85107283 A EP85107283 A EP 85107283A EP 0173804 A1 EP0173804 A1 EP 0173804A1
Authority
EP
European Patent Office
Prior art keywords
housing
contact piece
contact
contact pieces
axis
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
EP85107283A
Other languages
German (de)
English (en)
Other versions
EP0173804B1 (fr
Inventor
Jürg Ischi
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 EP0173804A1 publication Critical patent/EP0173804A1/fr
Application granted granted Critical
Publication of EP0173804B1 publication Critical patent/EP0173804B1/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
    • H01H33/02—Details
    • H01H33/025—Terminal arrangements
    • 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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention starts with a compressed gas switch according to the preamble of claim 1.
  • the invention relates to a prior art as described in US Pat. No. 4,139,752, in particular FIGS. 1 to 5.
  • This switch is used to extinguish an arc drawn between the contact pieces during a switching process by insulating gas, which is heated by the arc and stored in a heating volume surrounding the contact pieces.
  • additional devices for generating an extinguishing gas flow can be dispensed with and the drive of the switch can be kept small.
  • this switch cannot easily be installed in every switching position.
  • the compressed gas switch according to the invention is characterized in that, because of its small overall length in the direction of the contact piece axis, it can be installed in switchgear in such a way that the path of the current to be switched off runs transversely to the contact piece axis. This makes it possible to design the switchgear to be particularly space-saving. In addition, such a switch can be easily installed, since its contact system can be produced independently of its housing and can be attached by simply plugging it onto a fixed contact located in the housing.
  • Fig. 1 denotes an with an insulating gas such as sulfur hexafluoride of, for example, 4 bar pressure, filled, cylindrical housing.
  • an insulating gas such as sulfur hexafluoride of, for example, 4 bar pressure
  • bushings 2 and 3 are provided, through which a power connection 4 and 5 for a movable, fully cylindrical contact piece 6 and a fixed, highly cylindrical contact piece 7 are guided into the interior of the housing 1.
  • the power connection 2 is electrically conductively connected to the contact piece 6, which is movable in the direction of an axis shown in dash-dotted lines, by means of a sliding contact, which is not shown and is designed, for example, as a multi-lamella contact.
  • the movable contact piece 6, like the fixed contact piece 7, is designed to be erosion-resistant. Both contact pieces can be designed for the transmission of nominal current, however, when transmitting large nominal currents, it is advantageous to provide the movable contact piece 6 with a nominal current contact 8 shown in dotted lines in FIG. 1, which is connected to a fixed contact piece 7 and at the power connection 5 attached (also shown dotted) nominal current contact 9 cooperates.
  • This forms a nominal current path which now runs parallel to the contact pieces 6 and 7, which now only act as erosion contacts, and which runs outside a heating volume 10, which consists of a body 11, which is arranged coaxially with the contact pieces 6 and 7, and is made of a pressure-resistant and erosion-resistant insulating material, such as glass-fiber reinforced material Plastic that is surrounded.
  • the contact piece 7 does not necessarily have to be hollow cylindrical. Rather, it is also possible for it to be of fully cylindrical design and to close off the heating volume 10.
  • the movable contact piece 6 can be designed as a hollow cylinder.
  • the insulating material body 11 has a lower opening, into which the movable contact piece 6 is guided, and an upper opening, in which the fixed contact 7 is fastened to the insulating material body 11.
  • the fixed contact 7 contains two contact parts 12 and 13 (FIG. 2) designed as erosion-resistant nozzle half-shells, which are in electrically conductive connection with the power connection 5. This electrically conductive connection can be brought about in that the current connection 5 is led directly to the contact piece 7 or acts only indirectly on the contact piece 7.
  • the power connection 5 is formed from two flat rails 14 and 15 which run parallel to one another and which have fork-like widened ends in the region of the contact piece 7.
  • the ends of the two flat rails 14 and 15 rest on insulating parts 16 and 17, which are supported diametrically opposite outer surfaces of both contact parts 12 and 13 (see also FIG. 3).
  • the ends of the turns 18, 19 facing away from the flat rails 14, 15 are connected in an electrically conductive manner to a spring ring 21 which is arranged coaxially with the coil 20 and which presses the contact parts 12, 13 together.
  • the spring ring 21 is made of electrically conductive material and therefore mediates the electrical contact between the coil 20 and the contact parts 12 and 13.
  • the two flat rails 14, 15 are under the action of a spring 22.
  • the flat rails 14, 15 on the one hand supported in a defined manner on the contact parts 12, 13 and on the other hand a defined contact force is generated between the flat rails 14, 15 and a fixed contact 23 provided in the power connection.
  • the contact system described above can be completely preassembled and then only needs to be plugged onto the fixed contact 23 when mounting the compressed gas switch.
  • the power connections 4 and 5 are guided out of the housing 1 essentially transversely to the contact piece axis and each form at least one loop in the interior of the housing.
  • These loops are arranged in a plane containing the bushings 2 and 3 and the contact piece axis and each have a section 24 or 25 which extends in the axial direction and a section 26 or 27 which extends radially to the contact piece axis.
  • the section 24 extends from the bushing 2 downwards, whereas the section 25 extends from the bushing 3 upwards.
  • the section 26 adjoining the section 24 extends into the interior of the housing 1 and ends in the sliding contact surrounding the movable contact piece 6, while the section 27 adjoining the section 25 and also extends into the housing 1 is designed as flat rails 14, 15 as described above and ends at contact piece 7.
  • the configuration of the power connection 5 by means of parallel flat rails 14 and 15 ensures that the frictional forces between the fixed contact piece 7 and the movable contact piece inserted into the fixed contact piece 7 when switched on can be kept low.
  • the erosion on the contact pieces 6 and 7 is further reduced by the fact that the current to be switched off flows through the coil 20.
  • the magnetic field caused by the coil 20 namely causes the arc 28 to rotate about the contact piece axis. Since the coil 20 has two windings 18 and 19, each of which is fed in parallel by a flat rail 14 or 15, the attractive force of the flat rails 14 and 15 is also retained in the region of the fixed contact piece 7.
  • the spring ring 21 which receives the currents flowing through the parallel windings 18 and 19 of the coil 20 effects the current transfer to the contact parts 12 and 13.
  • the spring forces of this ring should hereby be dimensioned such that in the switched-on state, namely when the movable contact piece 6 is moved into the contact piece 7, the force effect of which ensures a sufficient current transfer from the fixed to the movable contact piece via the contact parts 12 and 13 with large and small currents. Since, as described above, the attractive and repulsive electromagnetic forces at the contact piece 7 are almost compensated for with large currents when the flat rails 14 and 15 are suitably dimensioned, it is possible to keep the frictional force between the fixed and movable contact piece and thus the contact abrasion low.
  • the arc 28 drawn between the contact pieces 6 and 7 heats up the insulating gas vigorously in the high current phase, as a result of which the gas pressure in the heating volume 10 is increased considerably.
  • a vigorous flow of insulating gas stored in the heating volume 10 then begins through the nozzle opening enclosed by the contact parts 12 and 13 into an expansion space delimited by the insulating body 11 and housing 1, through which the arc 28 is blown.
  • a further advantageous effect of the invention is to be seen in the fact that the heated insulating gas entering the expansion space first impacts the housing 1 on the side facing away from the drive, and in this case and during its subsequent outflow along the wall of the housing into the nominal current contacts, if applicable 8, 9 containing part of the housing is cooled considerably.
  • the nominal current contacts 8, 9, if provided, are then effectively protected against direct contamination by the extinguishing gases emerging from the heating volume 10 and heated to high temperatures, despite the short overall length of the housing in the axial direction.
  • An additional magnetic blowing is achieved by the coil 20, in particular if it is arranged in the region of the narrowest part of the opening of the contact piece 7.
  • a further blowing can also be achieved in that the lower opening in the insulating body 11 is designed as a nozzle which can be released by the movable contact piece 6 or when the movable contact piece 6 itself is designed as a nozzle.
EP85107283A 1984-08-22 1985-06-13 Interrupteur à gaz comprimé Expired EP0173804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH401584 1984-08-22
CH4015/84 1984-08-22

Publications (2)

Publication Number Publication Date
EP0173804A1 true EP0173804A1 (fr) 1986-03-12
EP0173804B1 EP0173804B1 (fr) 1988-09-21

Family

ID=4268211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107283A Expired EP0173804B1 (fr) 1984-08-22 1985-06-13 Interrupteur à gaz comprimé

Country Status (4)

Country Link
US (1) US4665288A (fr)
EP (1) EP0173804B1 (fr)
JP (1) JPH07101581B2 (fr)
DE (2) DE3435967A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2617633B1 (fr) * 1987-07-02 1989-11-17 Merlin Gerin Disjoncteur a arc tournant et a expansion
US5140107A (en) * 1991-07-02 1992-08-18 Ncr Corporation Digitizer screen and method of making
US5464956A (en) * 1994-04-08 1995-11-07 S&C Electric Company Rotating arc interrupter for loadbreak switch
DE19613568A1 (de) * 1996-04-04 1997-10-09 Asea Brown Boveri Leistungsschalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342520A1 (de) * 1973-08-23 1975-03-06 Calor Emag Elektrizitaets Ag Hochspannungsleistungsschalter
DE2811509A1 (de) * 1977-03-24 1978-10-05 Mitsubishi Electric Corp Stromkreisunterbrecher

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB485463A (en) * 1936-10-31 1938-05-20 British Electrical & Allied In Improvements in or relating to electrical circuit breakers
DE1864376U (de) * 1962-08-10 1962-12-27 Calor Emag Elektrizitaets Ag Hochspannungsschaltgeraet mit handbetaetigten schaltbruecken.
FR1366760A (fr) * 1963-12-06 1964-07-17 Coq France Chambre de coupure pour interrupteur à coupure en charge
US3632932A (en) * 1969-08-08 1972-01-04 Gen Electric Current-limiting circuit breaker having a field strap assembly
NL7306760A (fr) * 1973-05-15 1974-11-19
DE2339652A1 (de) * 1973-08-04 1975-02-20 Bbc Brown Boveri & Cie Loeschkammer fuer mittel- und hochspannungsschaltgeraete
JPS50156675A (fr) * 1974-05-31 1975-12-18
DE7740357U1 (de) * 1977-12-30 1980-11-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Druckgasschalter
FR2459543A1 (fr) * 1979-06-15 1981-01-09 Alsthom Cgee Disjoncteur a haute tension a arc tournant et autosoufflage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2342520A1 (de) * 1973-08-23 1975-03-06 Calor Emag Elektrizitaets Ag Hochspannungsleistungsschalter
DE2811509A1 (de) * 1977-03-24 1978-10-05 Mitsubishi Electric Corp Stromkreisunterbrecher

Also Published As

Publication number Publication date
EP0173804B1 (fr) 1988-09-21
JPS6161322A (ja) 1986-03-29
US4665288A (en) 1987-05-12
JPH07101581B2 (ja) 1995-11-01
DE3565190D1 (en) 1988-10-27
DE3435967A1 (de) 1986-03-06

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