US3715542A - Control means for pneumatically operated high voltage switching device - Google Patents

Control means for pneumatically operated high voltage switching device Download PDF

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Publication number
US3715542A
US3715542A US00883134A US88313469A US3715542A US 3715542 A US3715542 A US 3715542A US 00883134 A US00883134 A US 00883134A US 88313469 A US88313469 A US 88313469A US 3715542 A US3715542 A US 3715542A
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US
United States
Prior art keywords
valve
valve member
compressed gas
sheath
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.)
Expired - Lifetime
Application number
US00883134A
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English (en)
Inventor
P Grune
W Pucher
H Sandkvist
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ABB Norden Holding AB
Original Assignee
ASEA AB
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Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
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Publication of US3715542A publication Critical patent/US3715542A/en
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    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • 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
    • H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion
    • 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
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
    • 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
    • H01H33/42—Driving mechanisms
    • 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
    • H01H33/42—Driving mechanisms
    • H01H33/423—Driving mechanisms making use of an electromagnetic wave communication
    • 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
    • H01H2033/308—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator comprising control and pilot valves

Definitions

  • a high voltage switching device is operated by a compressed gas valve having an electrodynamic operating [52] U.S.Cl. ..200/148 R, 200/145, 200/148 B, means The operating means comprises a Stationary s ZOO/148 D coil which is inductively connected to a short-circuit [51] Int. Cl. ..H0lh 33/54 winding Supported by the movable member of Said 1 valve.
  • a capacitor 20045 located at high potential is connected to said coil through a photo-electric switching member.
  • the present invention relates to an electric switching device of the type comprising a container arranged at high potential and permanently filled with compressed 1 gas and having at least one movable contact and possibly a blast valve, an operating mechanism activated by compressed gas being arranged to operate
  • the operating mechanism which usually consists of a piston displaceable in a cylinder, communicates with the compressed air container through a compressed gas valve comprising a valve member which is movable in a valve housing.
  • the switching device may be, for example, a compressed gas circuit breaker, a load switch, a shortcircuiter or a high speed isolator.
  • operating means consisting of at least one stationary coil which, upon operation, is arranged to be fed with current from an energy accumulator situated at high potential and a short-circuit winding connected inductively. to the coil and being supported by or forming at least part of the movable valve member.
  • Such a valve can be operated in an extremely short time (some milliseconds) and, since the mass of the movable valve member is small compared with the mass of the breakers contact and blast valve, the amount of operating energy required, and thus the size of the capacitor battery, will be considerably less than in previously known constructions. Since, furthermore, the movable valve member, as opposed to the movable contact of the breaker, need not be dimensioned with any consideration of, for example, the current load capacity, it is easier to give a valve member a suitable shape from the pneumatic point of view so that the necessary operating pressure is extremely slight.
  • valve member An especially easily moved valve member is obtained by designing the member and arranging it in the valve housing in such a way that the force with which the compressed gas actuates the valve member is directed substantially perpendicular to the direction of movement of the valve member.
  • the valve member may be designed so that it is subjected on both sides to the influence of the compressed gas.
  • the valve may be used only for rapid opening or rapid closing of the device or for both functions.
  • the valve member In the first case the valve member is operated electrodynamically in only'one direction and is returned to its initial position pneumatically.
  • the valve member In the second case the valve member is operated electrodynamically in both directions.
  • a storage space for compressed gas may be arranged near the valve member, in which the compressed gas remains during the closing operation and thus influences the valve member with a certain pressure in addition to the closing pressure from the electrodynamic operation system.
  • FIG. 1 shows schematically how an operating system for a circuit breaker according to the invention may be constructed
  • FIGS. 2-5 show four different embodiments of compressed gas valves for such operating systems.
  • an induction coil permanently arranged in 'each valve housing and connected to capacitors 13, 14, respectively, through phot'othyristors 11, 12, respectively.
  • the photo-thyristors are controlled by means of light impulses from flash lamps l5, 16, respectively, arranged at earth potential.
  • a closing impulse is sent through the conduits 17 to the flash lamp 15 which, by means of a light impulse, ignites the photo-thyristor 11.
  • the precharged capacitor 13 is discharged over the induction coil arranged in the closing valve5 and the coil moves the valve member. into the desired position.
  • the breaker is-opened in a similar manner by an opening "impulse being potential and driven by a motor 26.
  • the valve shows a first embodiment of a valve for a gas blast circuit breaker according to the present invention.
  • the valve consists of a valve housing 29 in which a movable valve member 30 is arranged.
  • the valve member 30 is shaped substantially as a sheath with an axial through-channel 31, the
  • the valve member 30 is axially displaceable between two valve seats 32 and 33 cooperating with the two ends of the sheath, the sheath sliding in a sealing ring 34 arranged about its central part. On either side of the sealing ring 34 are the other two openings 7 and 9 of the valve which are directed radially, the opening 7 being connected to a compressed gas container at high potential and the opening 9 communicating with free air.
  • the valve member 30 is provided with a flange 35 which supports a short-circuit winding 36 in the form of a copper ring.
  • this winding 36 is adjacent an induction coil 37 permanently arranged in the -wall of the valve housing and connected to a capacitor, as shown in FIG. 1. Furthermore, it can be observed that the valve seat 33 covers an area A,, the sealing ring 34 an area A and the valve seat 32 an area In the embodiment shown in FIG. 2 the area A is so much greater than the area A that the required sealing pressure is obtained against the righthand valve seat 32.
  • a spring 38 arranged in the valve housing also contributes somewhat to the contact pressure, but this is not absolutely necessary.
  • the valve is operated, as mentioned before, by the capacitor battery being discharged over the induction coil 37 so that the valve member 30 is moved to its lefthand end position, where the required contact pressure is effected by the gas pressure on the surface (A A).
  • the central channel 31 of the valve and the driving means connected to this channel for the breaker contacts are thus placed under pressure so that the breaker is closed or opened.
  • the valve member 30 is returned to its righthand end position with the help of a return piston 39 in the valve housing.
  • This piston is operated by compressed gas being supplied to a space 40 to the left of the piston, through a throttled opening 41, so that the piston is moved to the right.
  • FIG. 3 shows another embodiment of an electrodynamically operated valve for gas blast circuit breakers.
  • the valve consists of a valve housing 29 in which a valve member 30 is movable.
  • the connection opening 7 of the valve is connected to acontainer (not shown) permanently filled with compressed gas and arranged at high potential, whereas the valves openings 46 are connected to at least one pneumatic driving means for the breaker contacts. Through exhaust openings 9 the openings 46 can be connected to the free air.
  • the valve member 30 is displaceable between two end positions where it seals against a lower valve seat 32 enclosing an area A, or an upper valve seat 33 enclosing an area A respectively.
  • valve member 30 On the side facing away from the connection opening 7, the valve member 30 is designed as a cylindrical cup projecting in the operating direction, the internal cylindrical surface of which surrounds an area A sealing against a piston 47 provided with a collar and directed axially in the valve housing.
  • the space 48 which is thus limited by the lower end surface of the piston 47 and the valve member 30 is in permanent communication with the container filled with compressed gas through openings 49.
  • the valve member is provided at the bottom with a flange 35 which supports a short-circuit winding 36 cooperating with an induction coil'37 to operate the valve.
  • an axially directed pin 50 is firmly screwed which has a cross-sectional area designated A
  • the pin 50 slides in a central hole in the piston 47 and its upper end projects into a central recess in a return piston 39, by means of which the valve member 30 can be returned from its upper to its lower end position by the space on the upper side of the piston 39 being put under pressure.
  • the sealing pressure against the valve seat 32 is effected by the pressure on the surface (A A A and by a spring 38.
  • the valve member 30 is operated by a capacitor being discharged over the induction coil 37 so that the valve member 30 is moved to its upper end position where the sealingpressure is determined by the pressure on the surface (A A A minus the pressure of the spring 38. Since in this way the movable valve member is designed to be biassed by the compressed gas on both sides of the member, the energy required to operate the valve can be reduced to a minimum.
  • FIG. 4 shows one half of a central section through a third embodiment of an operating valve for a gas blast circuit breaker according to the invention.
  • This valve .differs from the valves shown in FIGS. 2 and 3 in that it can be electrodynamically operated in both directions.
  • two induction coils 37 and 52 have been arranged in the valve housing 29, these coils cooperating in the end positions of the valve member 30 with one each of two short-circuit rings 36 and 53 arranged at the end surfaces of the valve member.
  • the connection opening 7 of the valve is connected to the compressed gas container of the breaker, the channel 31 to the driving member for the breaker contacts and the opening 9 to the free air.
  • a spring 38 has the task of giving the valve member 30 a certain bias force.
  • the sealing pressure is determined in the righthand end position of the valve member by-the pressure on the surface (A A and in the lefthand end position by the pressure on the surface (A A,), where the areas A A and A are equivalent to the corresponding areas in FIG. 2.
  • FIG. 5 differs from that shown in FIG. 4 in that a compressed gas storage space 55 has been arranged which ensures a definite return of the valve member 30 from the lefthand to the righthand end position.
  • This space 55 which is limited by the righthand, flange-shaped end part of the valve member 30 and a stationary wall 56 of the valve housing 29, communicates with the central channel 31 of the valve through openings 57 having limited through-flow area.
  • Valves of the type show are primarily intended to operate the main contacts of gas blast circuit breakers, high speed load switches, high speed short-circuiters or high speed isolators, but they may also be used to operate auxiliary breaking contacts, for example for switching-in and breaking resistors.
  • the valves are then released by the same light impulses which bring about the closing and opening of the main contacts but with suitable time delay in relation to these.
  • the energy to operate the valves is stored in individual capacitors which, however, are charged from the common charging unit shown in FIG. 1.
  • valves intended to operate a switching device according to the invention can be relatively simple but in spite of this enable an extremely rapid operation with only a small amount of operating energy.
  • a control device for a pneumatically operated high voltage switching device comprising an operating mechanism (1) activated by compressed gas, at least one compressed gas valve (5 or 6) separated from current-carrying parts of said switching device, said valve comprising a valve housing having an inlet opening (7) for compressed gas and a valve member (30) movable in said valve housing, said movable valve member being shaped substantially as a sheath having an axial through-channel (31), said through-channel permanently communicating with said operating mechanism (1), said valve housing including two valve seats (32,33), said valve member being axially displaceable between said two valve seats, said seats cooperating with both ends of said sheath, a sealing ring (34) arranged around the central part of said sheath, said sheath being slidable in said sealing ring, said valve housing having a second opening to the open air, said sheath including means for selectively closing said two valve openings (7,9), said operating mechanism including an inlet for compressed gas connected to said compressed gas valve housing, an electrodynamic operating means
  • said electrodynamic operating means comprises two windings (37,52) with short-circuit windings (36,53) to operate said valve member in opposite directions.
  • a control device in which one end part of said movable valve member situated nearest said inlet opening is provided with a flange, a wall (56) in the valve housing (29) within said sheath which limits therewith a space (55) which through a narrow channel (57) is in communication with said through-channel (31) inside the valve member.
  • a control device for pneumatically operated high voltage switching device comprising an operating mechanism (1) activated by compressed gas, at least one compressed gas valve (5 or 6) separated from current-carrying parts of said switching device, said valve comprising a valve housing having an inlet opening (7) for compressed gas and a valve member (30) movable in said valve housing, said valve housing including first (32) and second (33) valve seats, the first valve seat being around said inlet opening, said movable valve member in its end positions sealing against said first and second valve seats, said vcylindrical extension (30) towards the second valve seat slidable on'said piston, the space within said cylindrical extension being in permanent communication with said inlet opening, an electrodynamic operating means (36,37) in said valve housing for operating said valve member, said operating means comprising at least one stationary coil (37), said movable valve member including short-circuit means (36) movable therewith and inductively connected to said coil, an energy accumulator (13,14) at high potential, and

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Prostheses (AREA)
  • Circuit Breakers (AREA)
US00883134A 1968-07-16 1969-12-08 Control means for pneumatically operated high voltage switching device Expired - Lifetime US3715542A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17172/68*A SE321020B (de) 1968-07-16 1968-07-16

Publications (1)

Publication Number Publication Date
US3715542A true US3715542A (en) 1973-02-06

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ID=20303330

Family Applications (1)

Application Number Title Priority Date Filing Date
US00883134A Expired - Lifetime US3715542A (en) 1968-07-16 1969-12-08 Control means for pneumatically operated high voltage switching device

Country Status (7)

Country Link
US (1) US3715542A (de)
JP (1) JPS51708B1 (de)
CH (1) CH509650A (de)
DE (1) DE1962413C3 (de)
FR (1) FR2026241A1 (de)
GB (1) GB1285459A (de)
SE (1) SE321020B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787648A (en) * 1970-12-29 1974-01-22 Fuji Electric Co Ltd Tank-type gas-break circuit breaker
US4041264A (en) * 1974-09-30 1977-08-09 Asea Aktiebolag Operating device for a contact device for a pre-insertion resistor in a high-voltage circuit breaker
US11162603B2 (en) * 2016-03-11 2021-11-02 Karl Dungs Gmbh & Co. Kg Valve train

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52165504U (de) * 1976-06-09 1977-12-15
FR2462015A1 (fr) * 1979-07-16 1981-02-06 Merlin Gerin Clapet hydrolique bistable associe a un propulseur electrodynamique pour la commande d'un verin de disjoncteur rapide a haute tension
FR2685541B1 (fr) * 1991-12-23 1994-04-08 Gec Alsthom Sa Commande de disjoncteur.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142201B (de) * 1959-11-28 1963-01-10 Fuji Electric Co Ltd Schnellschalter
DE1190079B (de) * 1963-03-28 1965-04-01 Siemens Ag Elektrischer Schalter
US3189717A (en) * 1961-03-24 1965-06-15 Mitsubishi Electric Corp Compressed-gas circuit interrupter having cooperable arcing and disconnecting contacts with downstream blast valve
US3315056A (en) * 1964-09-10 1967-04-18 Fuji Electric Co Ltd Gas blast circuit breaker with electromagnetic contact actuating means
US3424199A (en) * 1965-04-12 1969-01-28 Asea Ab Magnetically operated valve
US3524958A (en) * 1966-09-01 1970-08-18 Westinghouse Electric Corp Fluid-blast circuit interrupters having electromagnetic piston-driving means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142201B (de) * 1959-11-28 1963-01-10 Fuji Electric Co Ltd Schnellschalter
US3189717A (en) * 1961-03-24 1965-06-15 Mitsubishi Electric Corp Compressed-gas circuit interrupter having cooperable arcing and disconnecting contacts with downstream blast valve
DE1190079B (de) * 1963-03-28 1965-04-01 Siemens Ag Elektrischer Schalter
US3315056A (en) * 1964-09-10 1967-04-18 Fuji Electric Co Ltd Gas blast circuit breaker with electromagnetic contact actuating means
US3424199A (en) * 1965-04-12 1969-01-28 Asea Ab Magnetically operated valve
US3524958A (en) * 1966-09-01 1970-08-18 Westinghouse Electric Corp Fluid-blast circuit interrupters having electromagnetic piston-driving means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787648A (en) * 1970-12-29 1974-01-22 Fuji Electric Co Ltd Tank-type gas-break circuit breaker
US4041264A (en) * 1974-09-30 1977-08-09 Asea Aktiebolag Operating device for a contact device for a pre-insertion resistor in a high-voltage circuit breaker
US11162603B2 (en) * 2016-03-11 2021-11-02 Karl Dungs Gmbh & Co. Kg Valve train

Also Published As

Publication number Publication date
DE1962413C3 (de) 1979-07-05
FR2026241A1 (de) 1970-09-18
DE1962413B2 (de) 1972-09-21
DE1962413A1 (de) 1970-11-19
SE321020B (de) 1970-02-23
CH509650A (de) 1971-06-30
JPS51708B1 (de) 1976-01-10
GB1285459A (en) 1972-08-16

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