US3359390A - Compressed gas circuit breaker with circulating system for compressed gas - Google Patents

Compressed gas circuit breaker with circulating system for compressed gas Download PDF

Info

Publication number
US3359390A
US3359390A US460690A US46069065A US3359390A US 3359390 A US3359390 A US 3359390A US 460690 A US460690 A US 460690A US 46069065 A US46069065 A US 46069065A US 3359390 A US3359390 A US 3359390A
Authority
US
United States
Prior art keywords
pressure tank
gas
pressure
compressor
low
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
US460690A
Other languages
English (en)
Inventor
Frowein Egbertus Adrianus
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
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 US3359390A publication Critical patent/US3359390A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H33/562—Means for avoiding liquefaction or for disposing of liquefaction products
    • 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
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches

Definitions

  • the present invention relates to circuit breakers of the compressed gas type and wherein the gas, for example SP6, is heated and flows in a closed circuit which comprises a high-pressure tank in communication with the contacts of the circuit breaker, a low-pressure tank and a compressor.
  • Circuit breakers of this general type are known and operate in such manner that the high-pressure tank receives the pressure gas from the compressor whenever the temperature of the pressure gas in the highpressure tank drops below a certain value, or whenever the gas pressure in the high-pressure tank has dropped too far.
  • a bi-metal valve is actuated, so that the difference in gas pressure as between the high-pressure and low-pressure tanks decreases.
  • a pressure relay trips and starts the compressor which feeds the gas, heated by the compression, to the high-pressure tank. This process results in an undesired delay until the correct operating temperature is restored. Because of this long delay, it is necessary to maintain a relatively great temperature interval of the pressure working point from the liquefaction line in the pressure-temperature diagram. Moreover, it takes a long time until the ditferential pressure relay starts the compressor.
  • the foregoing object of the present invention is obtained by an improved arrangement which is characterized in that the high-pressure tank is completely insulated as much as possible to prevent heat transfer through the walls thereof whereas the low-pressure tank is only partially heat-insulated, that over-pressure valves are provided between the high-pressure and low-pressure tanks to permit gas flow under certain over-pressure conditions from the high-pressure tank to the low-pressure tank; that a heating unit is arranged in series with the compressor unit in the gas flow circuit to and from the high and low pressure tanks; that relays are provided for bringing the compressor and heating units into operation, of which one relay operates in dependence upon the gas pressure in the high-pressure tank, another on the gas temperature in the high-pressure tank, and still another in response to a disconnecting signal at the circuit breaker.
  • FIG. 1 is a somewhat diagrammatic view of one suitable arrangement for a circuit breaker of the closed cycle, compressed gas, type incorporating the invention.
  • FIG. 2 is a view similar to FIG. 1 but showing a modification wherein means are provided for cooling certain live parts of the circuit breaker in order to reduce the power expended in heating of the compressed gas.
  • the circuit breaker 1 to which the invention has been applied is essentially a single-pole type but which includes two physically separate but series connected switching points 1a.
  • a separate switching chamber 3 is provided for each switching point and the interior of each chamber 3 is in ice open, i.e. continuous communication with the interior of the high-pressure tank 4 containing the compressed SP6 gas.
  • the switch contacts are closed, the interiors of switch chambers 3 are each filled with the high pressure gas.
  • Switch chambers 3 are housed within a low-pressure tank 2 the interior of which is connected via pipe line 2a with the low-pressure, intake side of compressor 8.
  • the high-pressure side of the compressor is connected through the pipe line 8a with the high-pressure tank.
  • the compressor takes in expanded pressure gas from the low-pressure tank and feeds with it over-pressure to the high-pressure tank.
  • the high-pressure tank is completely heat-insulated by a heat insulation 5.
  • the low-pressure tank is partly heat-insulated by an open heat-insulating layer 24.
  • Each of the switch chambers 3 is provided with an over-pressure valve 7 opening in the direction of the low-pressure tank 2 which permits the pressure gas to flow off from chamber 3 to the low-pressure tank 2 when the gas pressure difference in the high and low-pressure tanks has exceeded a predetermined value.
  • an electrical heating unit 9 Connected in series with the compressor 8 through the pipe lines 8a and 4a is in an electrical heating unit 9.
  • the latter consists of a pipe coil 9a on which is wound a filament type heating winding 9b.
  • the heating unit 9 serves to increase the temperature of the pressure gas in a certain predetermined manner after it leaves the compressor.
  • Gas-pressure sensing element p and temperature sensing element t functionally associated with the high-pressure tank 4 control relays P and T and serve to keep the pressure and the temperature of the pressure gas a certain operating value.
  • shut-off valve 10 it may be of advantage to arrange a bypass parallel to the pipe coil 9a of the heating unit, which is provided with a shut-off valve 10.
  • the shut-off valve With the shut-off valve open, the major part of the pressure gas fiows from the compressor within a short time directly into the high-pressure tank bypassing the heating unit.
  • the shut-off valve When the shut-off valve is closed, the entire pressure gas flows from the compressor through the heating unit.
  • the shut-off valve 10 is actuated by means of a switching solenoid 10a over one set of contacts of the relay P when the gas pressure in the high-pressure tank drops below a predetermined value and it is also actuated over one set of contacts on the relay S, which trips when a disconnecting signal is sent to the circuit breaker.
  • Relays T, P and S are also used for the control of the compressor and of the heating current for the heating unit.
  • Relay T with its temperature sensing element t works in dependence on the temperature of the gas in the high-pressure tank 4
  • relay P with its pressure sensing element 12 in dependence on the pressure of the gas in the high-pressure tank, and relay S when a disconnecting signal is sent to the circuit breaker.
  • connection of the contacts of relays T, P and S with the compressor 8 and with the filament winding 9b of the heating unit 9 is elfected in such a way that it results in the following interaction:
  • the two sets of contacts on the T-relay connect the electric driving motor of compressor 8 and the heating element 9b to the electrical supply line L-L.
  • the shut-off valve 10 remains closed.
  • Heated gas is thus pumped into the high-pressure tank 4 so that the pressure and the temperature rise there.
  • the over-pressure valves open 7 and the following gas circuit: high-pressure tank 4-over-pressure valves 7-low-pressure tank 2-compressor 8heating unit 9high-pressure tank 4 is established. This closed circuit is maintained until the necessary temperature is restored in the high-pressure tank. Due to this control, which reacts directly to the temperature in the highpressure tank, the normal temperature in the high-pressure tank is restored in a very short time.
  • the lowpressure tank 2 is partly insulated with a heat-insulation 24 to such an extent that the heat due to energy losses of the live parts of the circuit breaker is just transferred to the surrounding at the maximum ambient temperature. By this expedient the predetermined maximum temperature for these parts are not exceeded.
  • the electrical power consumed by the compressor and heater unit is reduced by this measure to a tolerable minimum.
  • a cooler 22 with a shut-off valve 23 controlled by solenoid 23a in a bypass parallel to the cooler is arranged according to FIG. 2 in the gas flow line in the direction of flow of the gas from compressor 8.
  • the solenoid 23a of the shut-off valve as is also actuated by a relay T1, which depends on the temperature of the gas in the low-pressure tank 2 which is monitored by a sensing element t
  • the low-pressure tank is also provided with partial heat insulation 24.
  • the compressor takes in too-hot gas.from the lowpressure tank and pumps it through the cooler 22 into the high-pressure tank 4 and the switch chambers 3. After the gas has left the cooler, it has cooled off substantially to ambient temperature and cools at the same time the live parts of the circuit breaker. It flows through the overpressure valves 7 into the low-pressure tank, where it has a cooling effect on the parts arranged there and then flows back to the compressor.
  • the cooling system cannot be used, and the heat generated by the live parts of the circuit breaker is transferred at the uninsulated part 24a of the low pressure tank to the surrounding air.
  • the low-pressure tank can therefore be heat-insulated to such an extent that the live parts can just transfer their heat due to energy losses over the uninsulated part of the low-pressure tank to the surrounding at an ambient temperature slightly higher but approximately equal to the predetermined minimum temperature of the pressure gas in the high-pressure tank, without exceeding the maximum temperatures predetermined for these parts.
  • the predetermined minimum temperature of the high-pressure gas is far below the maximum ambient temperature, a substantially greater part of the low-pressure tank can be heat-insulated in this case than it is possible in the arrangement according to FIG. 1. Accordingly, the heating power to be expended in the system according to FIG. 2 is much lower.
  • the partial insulation of the low-pressure tank has the result that the heating power andthe running time of the compressor are greatly reduced at low ambient temperatures, while at high ambient temperatures the compressor must run a certain time to obtain an additional cooling of the live parts.
  • a minimum of total annual output can be achieved by a suitable selection of the ratio of the heat insulated surface to the uninsulated surface of the low-pressure tank.
  • a circuit breaker of the compressed gas .type operating on a closed gas circulation system comprising a switch chamber containing contact means for the circuit breaker actuatable between closed and open positions, a high-pressure tank in communication with and supplying gas at high pressure into said switch chamber, a low-pressure tank within which said switch chamber is located, valve means between said switch chamber and low-pressure tank actuatable to open position at a predetermined over-pressure to effect gas flow from said high-pressure tank to said low-pressure tank, said high-pressure tank being fully heat insulated and said low-pressure tank being only partly heat insulated, a gas flow circuit connecting an outlet from said low-pressure tank with an inlet to said high-pressure tank, said gas flow circuit including a gas compressor and a gas heater unit connected in series, first relay means responsive to the gas temperature within said high-pressure tank for controlling said heater unit, second relay means responsive to the gas pressure within said highpressure tank for controlling said compressor, and third relay means responsive upon receipt of a disconnect signal for said contact means of said circuit breaker for
  • a compressed gas circuit breaker operating on a in said fourth relay means also serves to control the operation of said compressor, said compressor being turned on when said by-pass to said cooler unit is closed.
  • a circuit breaker of the compressed gas type operating on a closed gas circulation system comprising a switch contact casing containing contact means for the circuit breaker actuatable between closed and open positions, a high-pressure tank in communication with and supplying gas at high pressure into said switch contact casing, a low-pressure tank within which said switch contact casing is located, valve means between said switch contact casing and low-pressure tank actuatable to open position at a predetermined over-pressure to effect gas flow from said high-pressure tank to said low-pressure tank, said high-pressure tank being fully heat insulated and said low-pressure tank being only partly heat insulated, a gas flow circuit connecting an outlet from said low-pressure tank with an inlet to said high-pressure tank, said gas flow circuit including a gas compressor and a gas heater unit connected in series, a bypass for said heater unit, first relay means responsive to the gas temperature within said high-pressure tank for controlling said heater unit as well as said compressor, said heater unit and compressor being turned on when the temperature in said high-pressure tank drops below a
  • a circuit breaker of this compressed gas type operating on a closed gas circulation system
  • the combination comprising a switch contact casing containing contact means for the circuit breaker actuatable between closed and open positions, a high-pressure tank in communication with and supplying gas at high pressure into said switch contact casing, a low-pressure tank within which said switch contact casing is located, valve means between said switch contact casing and low-pressure tank actuatable to open position at a predetermined over-pressure to effect gas flow from said high-pressure tank to said low-pressure tank, said high-pressure tank being fully heat insulated and said low-pressure tank being only partly heat insulated, a gas flow circuit connecting an outlet from said low-pressure tank with an inlet to said highpressure tank, said gas flow circuit including a gas compressor, a gas cooler unit and a gas heater unit connected in series, said cooler unit being located at the discharge side of said compressor, a by-pass for said cooler unit, a by-pass for said heater unit, first relay means responsive to the gas temperature within said high-pressure tank for controlling

Landscapes

  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US460690A 1964-06-10 1965-06-02 Compressed gas circuit breaker with circulating system for compressed gas Expired - Lifetime US3359390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH758264A CH409061A (de) 1964-06-10 1964-06-10 Druckgasschalter mit einem Kreislaufsystem für das Druckgas

Publications (1)

Publication Number Publication Date
US3359390A true US3359390A (en) 1967-12-19

Family

ID=4327399

Family Applications (1)

Application Number Title Priority Date Filing Date
US460690A Expired - Lifetime US3359390A (en) 1964-06-10 1965-06-02 Compressed gas circuit breaker with circulating system for compressed gas

Country Status (4)

Country Link
US (1) US3359390A (enrdf_load_stackoverflow)
CH (1) CH409061A (enrdf_load_stackoverflow)
DE (1) DE1220009C2 (enrdf_load_stackoverflow)
FR (1) FR1435699A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423553A (en) * 1965-07-28 1969-01-21 Siemens Ag Arc-extinguishing apparatus for electric switches
US3526734A (en) * 1967-11-06 1970-09-01 Ite Imperial Corp Dead tank gas blast circuit breaker with interrupter structure immersed in low pressure of dead tank
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers
US3614355A (en) * 1968-04-22 1971-10-19 Coq Nv Sf{11 {0 system with constant density and constant pressure differential maintaining means for a high-voltage switchgear
US3619726A (en) * 1967-08-23 1971-11-09 Coq Nv Metal clad switch plants for high voltages with obturating means for preventing destructive pressure rise
US3619527A (en) * 1968-11-06 1971-11-09 Merlin Gerin Compressed-air electric apparatus embodying a drying device
JPS49147559U (enrdf_load_stackoverflow) * 1973-04-17 1974-12-19
US4006332A (en) * 1974-11-11 1977-02-01 Westinghouse Electric Corporation Convection heating apparatus for multi-phase gas-type circuit interrupters
DE3101964A1 (de) * 1980-01-28 1981-12-03 Hitachi, Ltd., Tokyo Druckgas-schaltungsunterbrecher
WO2008135484A1 (de) * 2007-05-08 2008-11-13 Siemens Aktiengesellschaft Druckentlastungseinrichtung einer gasisolierten schaltanlage
EP2677612A1 (en) * 2012-06-19 2013-12-25 ABB Technology AG Gas-insulated electrical apparatus having gas channel system, and method of operating the apparatus
US9343881B2 (en) 2004-06-09 2016-05-17 Abb Technology Ag Gas-insulated switchgear
EP2715892B1 (fr) 2011-05-24 2017-07-26 Schneider Electric Industries SAS Appareillage electrique a isolation gazeuse ayant un composé fluoré

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261220B (de) * 1966-02-04 1968-02-15 Siemens Ag Druckgasschalter mit einem geschlossenen Gaskreis
FR2167261B1 (enrdf_load_stackoverflow) * 1972-01-11 1974-07-26 Alsthom Cgee
DE2556768C2 (de) * 1975-12-17 1983-07-14 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Hochspannungsschaltanlage
CH619559A5 (en) * 1977-09-28 1980-09-30 Sprecher & Schuh Ag Compressed-gas high-voltage switch for outdoor installation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955182A (en) * 1957-06-21 1960-10-04 Ite Circuit Breaker Ltd Contact cooling means for recirculating gas blast interrupters
US3214544A (en) * 1961-03-24 1965-10-26 Westinghouse Electric Corp Cooling structures for closed-system gaseous electrical apparatus having terminal bushings
US3250970A (en) * 1962-01-23 1966-05-10 Bbc Brown Boveri & Cie Enclosed gas isolated and operated electrical supply and distribution switching-station with one or more gas blast power switches

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955182A (en) * 1957-06-21 1960-10-04 Ite Circuit Breaker Ltd Contact cooling means for recirculating gas blast interrupters
US3214544A (en) * 1961-03-24 1965-10-26 Westinghouse Electric Corp Cooling structures for closed-system gaseous electrical apparatus having terminal bushings
US3250970A (en) * 1962-01-23 1966-05-10 Bbc Brown Boveri & Cie Enclosed gas isolated and operated electrical supply and distribution switching-station with one or more gas blast power switches

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423553A (en) * 1965-07-28 1969-01-21 Siemens Ag Arc-extinguishing apparatus for electric switches
US3619726A (en) * 1967-08-23 1971-11-09 Coq Nv Metal clad switch plants for high voltages with obturating means for preventing destructive pressure rise
US3526734A (en) * 1967-11-06 1970-09-01 Ite Imperial Corp Dead tank gas blast circuit breaker with interrupter structure immersed in low pressure of dead tank
US3614355A (en) * 1968-04-22 1971-10-19 Coq Nv Sf{11 {0 system with constant density and constant pressure differential maintaining means for a high-voltage switchgear
US3619527A (en) * 1968-11-06 1971-11-09 Merlin Gerin Compressed-air electric apparatus embodying a drying device
US3566062A (en) * 1969-07-28 1971-02-23 Ite Imperial Corp Heater arrangement for sf-6 circuit breakers
JPS49147559U (enrdf_load_stackoverflow) * 1973-04-17 1974-12-19
US4006332A (en) * 1974-11-11 1977-02-01 Westinghouse Electric Corporation Convection heating apparatus for multi-phase gas-type circuit interrupters
DE3101964A1 (de) * 1980-01-28 1981-12-03 Hitachi, Ltd., Tokyo Druckgas-schaltungsunterbrecher
US9343881B2 (en) 2004-06-09 2016-05-17 Abb Technology Ag Gas-insulated switchgear
WO2008135484A1 (de) * 2007-05-08 2008-11-13 Siemens Aktiengesellschaft Druckentlastungseinrichtung einer gasisolierten schaltanlage
EP2715892B1 (fr) 2011-05-24 2017-07-26 Schneider Electric Industries SAS Appareillage electrique a isolation gazeuse ayant un composé fluoré
EP2677612A1 (en) * 2012-06-19 2013-12-25 ABB Technology AG Gas-insulated electrical apparatus having gas channel system, and method of operating the apparatus

Also Published As

Publication number Publication date
DE1220009B (enrdf_load_stackoverflow) 1973-12-06
DE1220009C2 (de) 1973-12-06
CH409061A (de) 1966-03-15
FR1435699A (fr) 1966-04-15

Similar Documents

Publication Publication Date Title
US3359390A (en) Compressed gas circuit breaker with circulating system for compressed gas
US2108560A (en) Circuit breaker
JPH01275401A (ja) 水素圧縮装置
US2720084A (en) Energy storage for air conditioning systems
US3566062A (en) Heater arrangement for sf-6 circuit breakers
US3599440A (en) Controllable compressor cooling installation
US3358104A (en) Heating means for compressed-gas circuit interrupters
US4216398A (en) Arrangement for cooling an electric machine
US2423929A (en) Locomotive cooling system
US2256757A (en) Electrical valve control system
US2255437A (en) Overload device for capacitor start electric motors
US3250970A (en) Enclosed gas isolated and operated electrical supply and distribution switching-station with one or more gas blast power switches
US3614355A (en) Sf{11 {0 system with constant density and constant pressure differential maintaining means for a high-voltage switchgear
US3879591A (en) Gas circuit breaker pressure connection for high and low pressure driers
US4542783A (en) Refrigeration equipment
US3702065A (en) Automobile air conditioning compressor superheat safety and ambient switch
US3137777A (en) Compressed-gas circuit interrupter with means for maintaining temperature of gas therein
US2412981A (en) Motor protector
US3559420A (en) Delayed restarting circuit for compressor motor
US2290984A (en) Refrigerating apparatus
US1953941A (en) Refrigerator control
CA1046621A (en) Compressed-gas multiphase circuit-breaker installation
US4534181A (en) Cooling system
US2847831A (en) Control mechanism for cooling and condensing equipment
US3701867A (en) Double pressure compressed air electric apparatus having an air drying device