US3678234A - Compressed gas switch having columnar construction - Google Patents

Compressed gas switch having columnar construction Download PDF

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Publication number
US3678234A
US3678234A US44517A US3678234DA US3678234A US 3678234 A US3678234 A US 3678234A US 44517 A US44517 A US 44517A US 3678234D A US3678234D A US 3678234DA US 3678234 A US3678234 A US 3678234A
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US
United States
Prior art keywords
gas
tank
readiness
piston
cylinder
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
US44517A
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English (en)
Inventor
Dieter Floessel
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
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3678234A publication Critical patent/US3678234A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs

Definitions

  • An electrical circuit breaker in which a pressurized gas such as SF, operating on a closed gas circuit is utilized to extinguish the are drawn between the switching contacts and perhaps also to actuate the contacts themselves includes an upstanding hollow insulator column at the top of which is supported a switch contact chamber and an adjacently located readiness tank containing the pressurized gas ready for delivery to the contact chamber as soon as a switching-out sequence is initiated.
  • a pressurized gas such as SF
  • JMIWX may 5mm:
  • the switch contact chamber and the readiness tank are at high voltage potential, and the readiness tank is connected to a storage tank at ground potential, which is located at the bottom of the insulator column, by way of a gas line made of insulating material which extends through the hollow insulator column.
  • Circuit breakers of the type as described are, more particularly disclosed, for example, in German Pat. No. 873,420.
  • the readiness tank is connected by way of a check, i.e. a one-way valve to a compressed gas feed line which, in turn, is con nected by way of a main valve with a storage tank at ground potential and from which the compressed gas in the readiness tank is replenished.
  • the main valve is opened mechanically, upon a decrease in gas pressure in the readiness 'tank, by way of a cam plate operating by way of an insulated shaft, or by actuation of the contact arrangement in the switch.
  • a magnetic drive,-or the like is required for operation of the main valve.
  • the primary object of the present invention is to provide a more simple and less expensive constructional arrangement for effecting the desired rapid delivery ofreplenishment gas to the readiness tank and whichfmakes it possible to complete the gas replenishment operation during the no-current interval of a brief interruption switching sequence.
  • this objective is achieved in that the readiness and storage tanks communicate with each other via an insulated gas line of relatively large cross section, the storage tank itself being constituted as a cylinder within which a first piston slides, this piston being mechanically connected, on the side away from thehigh pressure admission to the cylinder, with a second piston which is continuously admitted with gas from a pressurized gas reservoir, the forces acting on both pistons, in opposite directions being in FIG. 1 is a view in central vertical section of the improved compressed gas circuit breaker assembly, and
  • FIG. 2 is likewise a sectional view of a modified construction for adetail of the complete assembly of FIG. 1.
  • the circuit breaker assembly comprises a lower, base part 1 which is at the so-called ground'f potential of the installation, which has erected upon it a hollow insulator column 2 that serves as a support, at its upper end, for the high potential parts of the circuit breaker which include a tubular metallic casing 3 from which there extends in a lateral direction a switch contact chamber 4 made from insulating material and which houses the switching point that is constituted by a stationary hollow contact stud 5 and a movable contact stud 6.
  • the contact members 5 and 6 are depicted in F l6. 1, in adisengaged position.
  • the movable switch contact stud 6 is actuated to and from engagement with the stationary contact stud 5 by a mechanical linkage train which includes a horizontally movable rod 6a, one end of which is secured to stud 6 andthe opposite end articulated to one arm of a bellcrank lever 7, and a rod 8 of insulating material which extends downwardly from an articulated connection with the other arm of this bellcrank through casing 3 and insulator column 2 to a drive mechanism 9, known in itself, and hence represented only schematically in block form, the drive device 9 being mounted on the base part I.
  • a mechanical linkage train which includes a horizontally movable rod 6a, one end of which is secured to stud 6 andthe opposite end articulated to one arm of a bellcrank lever 7, and a rod 8 of insulating material which extends downwardly from an articulated connection with the other arm of this bellcrank through casing 3 and insulator column 2 to a drive mechanism 9, known in itself, and hence represented only schematically in block form, the drive device 9 being
  • the readiness tank 12 Formed at the upper end portion of the metallic casing 3 by means of a transverse partition wall 3a is the readiness" tank 12 containing the arc extinguishing gas at high pressure, this tank being adapted to communicate with the interior of the switch contact chamber 4 by means of a blast valve 10 controlling a port through the wall 3a.
  • Valve 10 is actuated by meansof a vertically reciprocal, rod 13 made of insulating material, the lower end of this rod being connected to another drive device 14, likewise known in itself, and hence represented only schematically in fblock" form, the drive device 14 also being mounted on the base part 1.
  • the blast valve 10 When the component parts are in the positions depicted in FIG. 1, which designates the beginning of a switching-off operation, the blast valve 10 has just opened by actuating-rod 13 from the drive 14 thus permitting high pressure gas stored within the readiness tank 12 to flow in the direction indicated by the arrows.
  • the gas passes into switch chamber 4, thence v the upper casing part 3. Movement of contact stud 6 in the equilibrium in the neutral state of the switch, i.e. when the switch contacts are in their closed position and the switch is in its readiness" state.
  • the improved construction in accordance with the invention enables one to maintain, in an advantageous manner the pressure in the high. pressure part of the circuit breaker relative low in view of the heating expense in the case of low surrounding temperatures.
  • stationary contact stud 5 is effected by means of the drive mechanism 9.
  • the high pressure gas also flows from chamber 4 into and through the stationary contact stud 5, thence into a hollow metallic elbow type of fitting 11 and thence through a hollow insulator 15 located beneath the contact chamber 4 into the casing part 3 to join with the gas incoming from the other contact stud 6.
  • a tank for storage of gas at high pressure is provided at the lower base part 1 in the form of a hollow cylinder 18 the interior 17 of which communicates, at one end thereof with the lower end of a compressed gas pipe 16 of comparatively large cross-section to avoid an unduly large drop in pressure,
  • This compressed gas pipe 16 which is made from an insulating material also extends upwardly through the hollow insulator 2 and casing 3, and is connected at its upper end with the interior of the readiness tank 12.
  • cylinder 18 Slidably mounted within cylinder 18 is its associated piston 19 which is connected by rod 20 with a second piston 21 slidably mounted in a second cylinder 29 of smaller diameter than cylinder 18 which adjoins the latter.
  • the common space 22 within the adjoining cylinders 18, 29 is connected via a pipe line 23 with the lowerpressure section of the circuit breaker, i.e. within the base part 1.
  • the outer end of cylinder 29 is in continuous communication with a separate compressed gas contained in a pressure reservoir 25, and hence the gas pressure within this end of cylinder 29 from the reservoir 25 is applied to the end face of piston 21.
  • the pressure reservoir 25 may be constituted by a commercial type nitrogen bottle which is filled to a pressure of 100 or more atmospheres above atmospheric.
  • the gas pressure within the readiness tank 12 is immediately restored to the same high value as it initially had prior to the first opening operation of the circuit breaker contacts, entirely without regard to the subsequent operation of compressor 28, and thus enables a second andimmediate opening operation of the breaker contacts, if necessary, to take place at the initially prevailing high gas pressure in the readiness tank.
  • a slide type cam part 26 secured to rod functions to close the contacts of an auxiliary switch 27 which then functions to activate an electric motor driven gas compressor 28.
  • the compressor inlet is connected to the low pressure side of the SP gas circuit, i.e. within the component parts 1, 2 and 3, and the compressor outlet is connected to the space 17 defined by the interior of cylinder 18 so as to ultimately restore the pressure within the space 17, pipe line 16 and readiness tank to its proper steady-state level, and effect return movement of piston structure 19-20-21 to the right to regain its initial, starting position.
  • an electrical circuit breaker of the type wherein apressurized gas such as SF is utilized for extinguishing the arc drawn between the switching contacts as said contacts disengage and flows in a closed gas circuit the combination comprising an upstanding hollow insulator column, a switch contact chamber and a readiness tank located at the upper end of said insulator column, said readiness tank containing the pressurized gas ready for delivery to the switch contact chamber upon initiating a switching-out sequence involving opening of a blast valve which serves to interconnect said readiness tank and switch contact chamber, a storage tank for pressurized replenishment gas located at the lower end of said insulator column, said storage tank being constituted as a first cylinder,
  • An electrical circuit breaker as defined in claim 1 wherein said second cylinder constitutes an extension of said first cylinder and establishes a space between the two pistons, and which further includes a pipe line communication between said space and a low gas pressure part of said circuit breaker such as the space within said hollow insulator and into which the pressurized gas from said readiness tank flows after performing its arc extinction function when said switch contacts disengage.

Landscapes

  • Circuit Breakers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Gas-Insulated Switchgears (AREA)
US44517A 1969-06-18 1970-06-08 Compressed gas switch having columnar construction Expired - Lifetime US3678234A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH927569A CH501304A (de) 1969-06-18 1969-06-18 Druckgasschalter der Säulenbauart
DE6924553U DE6924553U (de) 1969-06-18 1969-06-19 Druckgasschalter der saeulenbauart
DE1931094A DE1931094C3 (de) 1969-06-18 1969-06-19 Druckgasschalter der Säulenbauart

Publications (1)

Publication Number Publication Date
US3678234A true US3678234A (en) 1972-07-18

Family

ID=27176185

Family Applications (1)

Application Number Title Priority Date Filing Date
US44517A Expired - Lifetime US3678234A (en) 1969-06-18 1970-06-08 Compressed gas switch having columnar construction

Country Status (8)

Country Link
US (1) US3678234A (de)
JP (1) JPS508182B1 (de)
CH (1) CH501304A (de)
DE (2) DE6924553U (de)
FR (1) FR2052565A5 (de)
GB (1) GB1308239A (de)
NL (1) NL162237C (de)
SE (1) SE357095B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103730277A (zh) * 2013-12-20 2014-04-16 吴江市东泰电力特种开关有限公司 气体灭弧室
US20170213673A1 (en) * 2014-07-25 2017-07-27 Abb Schweiz Ag Refill-container for replenishing and/or reconditioning an insulation fluid contained in an insulation space of an electrical apparatus
US9938983B2 (en) 2012-11-07 2018-04-10 Thermodyn Sas Compressor with thrust balancing and method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740509A (en) * 1971-01-13 1973-06-19 Bbc Brown Boveri & Cie Compressed gas circuit breaker having coupled variable-volume high and low pressure chambers for expediting gas pressure recovery in the high pressure chamber

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824937A (en) * 1954-12-30 1958-02-25 Westinghouse Electric Corp Circuit interrupters
FR1206229A (fr) * 1958-06-04 1960-02-08 Merlin Gerin Disjoncteur pneumatique à circuit fermé
US3099733A (en) * 1959-11-19 1963-07-30 Westinghouse Electric Corp Circuit interrupter
US3214546A (en) * 1961-10-12 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters having improved arc-extinguishing means
US3246108A (en) * 1961-02-15 1966-04-12 Westinghouse Electric Corp Arc-extinguishing structure and tank housing for a compressed-gas circuit interrupter
DE1230885B (de) * 1965-06-01 1966-12-22 Asea Ab Hochspannungsdruckgasschalter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824937A (en) * 1954-12-30 1958-02-25 Westinghouse Electric Corp Circuit interrupters
FR1206229A (fr) * 1958-06-04 1960-02-08 Merlin Gerin Disjoncteur pneumatique à circuit fermé
US3099733A (en) * 1959-11-19 1963-07-30 Westinghouse Electric Corp Circuit interrupter
US3246108A (en) * 1961-02-15 1966-04-12 Westinghouse Electric Corp Arc-extinguishing structure and tank housing for a compressed-gas circuit interrupter
US3214546A (en) * 1961-10-12 1965-10-26 Westinghouse Electric Corp Compressed-gas circuit interrupters having improved arc-extinguishing means
DE1230885B (de) * 1965-06-01 1966-12-22 Asea Ab Hochspannungsdruckgasschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9938983B2 (en) 2012-11-07 2018-04-10 Thermodyn Sas Compressor with thrust balancing and method thereof
CN103730277A (zh) * 2013-12-20 2014-04-16 吴江市东泰电力特种开关有限公司 气体灭弧室
US20170213673A1 (en) * 2014-07-25 2017-07-27 Abb Schweiz Ag Refill-container for replenishing and/or reconditioning an insulation fluid contained in an insulation space of an electrical apparatus

Also Published As

Publication number Publication date
DE6924553U (de) 1971-04-01
NL162237C (nl) 1980-04-15
JPS508182B1 (de) 1975-04-02
DE1931094C3 (de) 1980-01-03
NL162237B (nl) 1979-11-15
GB1308239A (en) 1973-02-21
NL7008754A (de) 1970-12-22
CH501304A (de) 1970-12-31
DE1931094B2 (de) 1979-04-19
FR2052565A5 (de) 1971-04-09
SE357095B (de) 1973-06-12
DE1931094A1 (de) 1970-12-23

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