US3239636A - Electrical switch having rotary movable contact with vane piston contact actuating means - Google Patents

Electrical switch having rotary movable contact with vane piston contact actuating means Download PDF

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Publication number
US3239636A
US3239636A US319745A US31974563A US3239636A US 3239636 A US3239636 A US 3239636A US 319745 A US319745 A US 319745A US 31974563 A US31974563 A US 31974563A US 3239636 A US3239636 A US 3239636A
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US
United States
Prior art keywords
piston
vane piston
cylinder
contact member
pressurized gas
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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
US319745A
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English (en)
Inventor
Floessel Carl Dieter
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 Germany
Original Assignee
Bbc Brown Boveri & Cie
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Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3239636A publication Critical patent/US3239636A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • 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
    • H01H33/302—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator for fluid insulated switchgear, wherein the insulating fluid is also the working fluid
    • 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
    • H01H33/86—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve

Definitions

  • the present invention relates to an improved construction for gas blast breakers with multiple interruption, where at least one voltage isolating switching point is connected electrically in series with impulse-power switching points to insure in the disconnected position of the switch the insulation "over the open switch-ing gap, the voltage switching point being arranged in a switch chamber that is continually subjected to a pressurized gas.
  • the voltage isolating switching point can be designed either as a soseries disconnector with interruption in air, or as an interruption point which is arranged in a switch chamber filled with a pressurized gas.
  • the movable contact piece is pinor tulip-shaped and performs a thrust movement in the switch to which end it is in driving connection with a pressure gas actuated piston.
  • the problem underlying the invention is to provide a simple and inexpensive solution of a voltage switching point for high-speed gas blast breakers, where the above mentioned disadvantages of the known embodiments are avoided.
  • the movable blade-shaped contact pieces of the voltage switching point be secured on a shaft supported in the switch chamber housing, and that the shaft be connected for rotation with a rotary piston drive whose vane piston movable in a cylinder can be admitted alternately with a pressurized gas from one and the other side in such a Way that pressurized gas from a storage vessel is used for disconnection and pressurized gas from the switch chamber for connection, the chamber which happens to be on the non-admitted side of the vane piston being in communication with the outside air.
  • FIG. 1 shows an embodiment according to the invention where the switch chamber is partly represented in a section
  • FIG. 2 shows a longitudinal section through the rotary piston drive attached laterally on the switch chamber according to FIG. 1;
  • FIG. 3 shows a cross section through the rotary piston drive according to FIG. 2 along the line III-III.
  • the switch chamber housing 1 is terminated at both sides by the flange par-ts 2a, 2b, which are joined by the insulators 3a, 3b.
  • 4 designates the blade-shaped contact piece of the voltage isolating switch which is connected rigidly with the drive shaft 5 and which is arranged symmetrically with the latter.
  • the drive shaft 5 is rotatably mounted at its ends in known manner in the switch chamber housing 1.
  • FIG. 2 shows a longitudinal section and FIG. 3 a cross section along the line III-I'II10f FIG. 2 of the rotary piston drive actuating the drive shaft 5.
  • the vane piston 10 rigidly connected with the drive shaft 5.
  • This piston has at both sides disk-shaped valve elements 11a, 1117, which are rigidly connected with the vane piston in known manner, for example, by vulcanization.
  • the tubular nipples 12a, 12b which are designed as valve seats at at their ends facing the valve discs 11a, 11b on vane piston 10.
  • the nipples 12a, 12b have at their outer end a collar and are pressed by means of the cup spring 13 against the sealing rings 14.
  • the partition 15 serves to subdivide and reduce the size of the effective chambers 16a, 16b in the cylinder housing 1a.
  • -17 is a cover (FIG. 3) which terminates the cylinder housing In laterally.
  • the extension 1b contains a reversing valve 18 which is conected over the valve rod 18a with the drive piston 13b.
  • the pressurized gas line 23 connects the chamber 24 under the drive piston 18b with that part of the cylinder housing 1a which houses the nipple 12a, while the pressurized gas line 25 leads from the chamber 19 containing the reversing valve to the nipple 12b.
  • the interior of the switch chamber housing 1 is connected with the chamber 19 through the aperture 26 that can be closed by the reversing valve 13.
  • Finally 27 designates a hollow supporting insulator which is rigidly connected with the extension 1b and which serves as a support for the entire switch chamber.
  • the method of operation of the above described arrangement is as follows: In the represented position (FIG. 1), the voltage switching point 4 is in the disconnected state.
  • the interior of the switch chamber housing 1 is connected by way of a non-illustrated compressed gas line with a storage vessel, likewise not represented, of the gas blast breaker and is constantly under gas pressure.
  • the interior of the supporting insulator 27 is connected through a switch valve of known design, not represented, on the lower part of the switch with the storage vessel of the latter and is thus likewise under pressure.
  • the chamber 16a in the cylinder housing 1a is filled with pressurized gas through the line 23 and the nipple 120, which presses the vane piston 10 via its disk-shaped valve element 11b, which is designed preferably as an elastic sealing disk, firmly against the end of nipple 12b.
  • the latter is connected through the line 25, the chambers 19 and 21, which communicate through the wide bore for the piston rod 18a, and the apertures 22 with the open air and is thus pressure-free.
  • the aperture 26 between the switch chamber housing 1 and the chamber 19 is closed by the reversing valve 18, since the pressure in the chamber 24 retains the piston 18b and thus the reversing valve 18 in its upper limiting position.
  • the nipple 12b in the cylinder housing 1a is yeldingly mounted by means of the sealing ring 14, inaaccuracies in the manufacture regarding a non-planar fit of the sealing disk 11b on the valve seat at the inner end of the nipple 12b are automatically compensated.
  • the interior of the supporting insulator 27 is ventilated by means of the above mentioned switch valve, not represented.
  • chamber 24 under the drive piston 18b of the reversing valve 19 is ventilated, and on the other hand the chamber 16a is ventilated through the interior of the nipple 12a and the line 23.
  • Chamber 16a is ventilated, as already mentioned and reduced in size during the rotation of the vane piston 10 until the latter strikes with its sealing disk 11a against the nipple 12a.
  • the connecting position of the voltage switching point 4, 611-617 has thus been reached, since the drive shaft connected with the vane piston has brought the movable contact piece 4 (FIG. 1) into the horizontal position, in which the contact piece 4 engages at both ends the fixed contact pieces 6a, 6b.
  • Subsequent disconnection is efiected again by introducing pressurized gas into the interior of the supporting insulator 27, filling the chamber 24, the line 23 and the chamber 16a, and causing the reversing valve 18 to move into its upper limiting position.
  • a gas blast circuit breaker comprising at least one set of power interrupting contacts of the impulse type connected in series with the separable contact members of a voltage isolating switch to insure an adequate voltage isolation in the switched-out position of the circuit breaker
  • said voltage isolating switch is comprised of at least one stationary contact member located in a switch chamber filled with a pressurized gas and a movable blade shaped contact member mounted on a rotatable shaft to engage and be disengaged from said stationary contact member, a rotary piston type drive for said shaft including a vane piston secured to said shaft and mounting for rotation in a cylinder between two limiting positions corresponding respectively to the engaged and disengaged positions of the contact members of said voltage isolating switch, said vane piston including a disc-shaped valve plate at each side thereof, a pair of nipples extending into said cylinder at opposite sides of said vane piston, the mouths of said nipples being cooperative respectively with said valve plates in alternation such that the mouth of one

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
US319745A 1962-12-20 1963-10-29 Electrical switch having rotary movable contact with vane piston contact actuating means Expired - Lifetime US3239636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1492362A CH397040A (de) 1962-12-20 1962-12-20 Einrichtung bei Druckgasschaltern

Publications (1)

Publication Number Publication Date
US3239636A true US3239636A (en) 1966-03-08

Family

ID=4404886

Family Applications (1)

Application Number Title Priority Date Filing Date
US319745A Expired - Lifetime US3239636A (en) 1962-12-20 1963-10-29 Electrical switch having rotary movable contact with vane piston contact actuating means

Country Status (3)

Country Link
US (1) US3239636A (en:Method)
BE (1) BE641431A (en:Method)
CH (1) CH397040A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766343A (en) * 1970-11-23 1973-10-16 J Gratzmuller High power hydraulic control systems for an electric switch

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350066A (en) * 1941-03-31 1944-05-30 Parker Appliance Co Hydraulic motor
GB794204A (en) * 1955-04-26 1958-04-30 Vickers Electrical Co Ltd Improvements relating to electric circuit breakers
DE1099616B (de) * 1955-01-14 1961-02-16 English Electric Co Ltd Durch Druckfluessigkeit betaetigter Fluegelantrieb, insbesondere fuer elektrische Schaltgeraete

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350066A (en) * 1941-03-31 1944-05-30 Parker Appliance Co Hydraulic motor
DE1099616B (de) * 1955-01-14 1961-02-16 English Electric Co Ltd Durch Druckfluessigkeit betaetigter Fluegelantrieb, insbesondere fuer elektrische Schaltgeraete
GB794204A (en) * 1955-04-26 1958-04-30 Vickers Electrical Co Ltd Improvements relating to electric circuit breakers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766343A (en) * 1970-11-23 1973-10-16 J Gratzmuller High power hydraulic control systems for an electric switch

Also Published As

Publication number Publication date
BE641431A (en:Method) 1964-04-16
CH397040A (de) 1965-08-15

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