US3766343A - High power hydraulic control systems for an electric switch - Google Patents

High power hydraulic control systems for an electric switch Download PDF

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Publication number
US3766343A
US3766343A US00197809A US3766343DA US3766343A US 3766343 A US3766343 A US 3766343A US 00197809 A US00197809 A US 00197809A US 3766343D A US3766343D A US 3766343DA US 3766343 A US3766343 A US 3766343A
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United States
Prior art keywords
valve
casing
hydraulic
pressure
inlet port
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Expired - Lifetime
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US00197809A
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English (en)
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J Gratzmuller
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers

Definitions

  • Standard hydraulic controls consist in essence of the following elements: at least one hydraulic power device, generally a jack, which operates the member to be controlled, such as the movable contact in a switch;
  • the object of the present invention is to overcome these difficulties, which with high power hydraulic controls arise from the increase in operating pressures and in particular from'the considerable problems posed by the provision of joints.
  • operational members or control members will designate the members such as pilot electrovalves which transform low power electric impulses into hydraulic orders, of high pressure but low feed rate, which are applied to the functional members.
  • a high power hydraulic remote control system including a plurality of functional members, a plurality of operational members, and a hydraulic station for supplying said members with hydraulic fluid under high pressure, at least those functional members which are likely to be subjected to hydraulic fluid at high pressure and high flow rate being grouped together in a block in the form of a functional assembly wherein the hydraulic linkages are made through connecting surfaces of said functional members by large cross-section orifices, with no interposed conduits, and the'hydraulic linkages between the functional assembly, the hydraulic station and the operational members, which linkages may be of greater length than those of the functional assembly, being provided by low power conduits.
  • the operational members preferably grouped as an operational assembly, may be common to several functional assemblies which may be quite distant, e.g., several metres, from the operational assembly.
  • FIG. 1 is a schematic representation of an hydraulic control system in accordance with the invention, as ap-' plied to a switch;
  • FIG. 2 is a detailed view of one of the functional assemblies, or power assemblies, used in a control system in accordance with the invention.
  • FIG. 1 shows a high power hydraulic control system for operating three single-pole switches 2, 2', 2" whose movable contacts 4, 4', 4" are operated by hydraulic jacks 6, 6', 6" respectively, of functional assemblies 18, 18, 18" of the control system. Since the functional part of the hydraulic control is identical for each switch, and is shown in greater detail in FIG. 2, only the functional assembly 18 which concerns the switch 2 will be described.
  • this assembly includes at least the jack 6, a piloted hydraulic inlet valve 8, a source of high pressure oil such as an oleopneumatic accumulator 10, and a hydraulically piloted purge valve 12.
  • the functional assembly 18 preferably also includes an intermediate low pressure reservoir or tank 14.
  • the accumulator 10 is affixed directly to the body of valve 8, itself fixed to head 16 of jack 6. Also fixed directly on head 16 is the purge valve 12 to whichin turn is attached the tank 14.
  • Each functional assembly 18, or power assembly is thus mounted directly on the equipment, such as a switch, which is to be controlled.
  • Each of the accumulators 10, 10" is charged with high pressure oil by a respective conduit 20, 20, 20" with these conduits being connected by a conduit 22 to an hydraulic station 24 which may be a certain distance (several meters) from the functional assemblies.
  • the hydraulic station may include a pump P which draws water from a low pressure reservoir 25 and forces it into the conduit 22, with a buffer accumulator 27 possibly mounted in parallel.
  • the inlet valves 8 and purge valves 12 for the functional assemblies receive hydraulic orders emitted by order-sending members, or operational members, which in FIG. 1 have been represented simply by the electro-valves 26, 26', 26" and which are grouped in an operational assembly 28 which may be several metres away from the functional assemblies 18, 18', 18" and connected thereto by conduits 30, 30, 30".
  • Conduits 31, 31', 31" connect the inlet valves and the purge valves together.
  • the only conduit which have an appreciable length are-those through which oil passes at-a low rate, and consequently these conduits may have a small cross-section, with no inconvenience even if they are of long length.
  • conduits 20, 20', 20", 22 need only transmit the amount of oil needed for recharging the accumulators, and this recharging takes a very long time in relation to the operating time forthe jacks 6, 6, 6".
  • the conduits 30, 30", 30" for sending hydraulic orders only have to transmit pressure impulses (or pressure relief rm pulses), with scarcely any movement of oil, to operate the inlet valves 8 and purge valves 12.
  • the intermediate tanks 14, 14, 14" are connected to themain tank 25 by conduits 32, 32', 32" ofquite small crosssection and low pressure, since the emptying of the intermediate tanks can be effected relatively slowly, between two operations, under atmospheric pressure or at most a small extra pressure.
  • the driving member in this assembly is the hydraulic jack 6.
  • This jack may be a single-action jack acting against return means, such as resilient return means.
  • return means such as resilient return means.
  • FIG. 1 it was assumed that the jacks-6 were single- 1 action jacks acting by pushing.
  • FIG. 2 there is also shown a single-action jack, but one acting by traction, i.e., its shaft 34, extended by an insulating shaft 36, operates the movable contact of the switch by means of a standard motion-reversing mechanism, not shown (bell crank, rack and pinion, or the like).
  • a standard motion-reversing mechanism not shown (bell crank, rack and pinion, or the like).
  • the jack 6 may be a double-acting jack or a rotary jack.
  • the source of high pressure for the power assembly is preferably the oleopneumatic accumulator 10 whose cinity of the driving jack, without any interposition of long conduits or connections.
  • the relative volumes of the jack and the accumulator have not been truly represented. In practice the volume of the accumulator would'be several times greater than that of the jack.
  • Acalibrated jet 40 may be used to control the rate of feed of oil from accumulator 10 towards the jack 6 to control the speed of displacement of the jack piston 42 in operating direction.
  • the invention applies especially to high pressure hydraulic controls (above 300 bar), it is particularly advantageous to use oleopneumatic accumulators 10 whose gas compartment 44 is filled with gas such as.
  • a high power functional assembly in accordance with the invention may comprise only the four main members just described: High pressure source (oleopneumatic accumulator), inlet valve, power jack, and purge valve.
  • High pressure source oil accumulator
  • inlet valve inlet valve
  • power jack power jack
  • purge valve in this case outlet 52 of the purge valve should be connected to a conduit of large cross-section and relatively long length taking the purged oil to the main tank 25. This conduit would have to provide passage for a large flow rate, but at low pressure, which would'not therefore create any particular difficulty; it
  • low pressure intermediate reservoir 14 which is directly attached to the purge valve 12.
  • This intermediate reservoir 14 can be emptied relatively slowly, between two operations of the jack, by the low pressure and low cross-section conduit 32.
  • a non-return valve 54 permits air to return into the reservoir 14 when this empties, this valve being preferably disposed as described in French Patent 1,345,674.
  • the intermediate reservoir 14 may be replaced by low pressure hydraulic accumulators, of various types, such as with a spring, a gas cushion, a bladder, a-membrane or a blower.
  • the functional assembly 18 receives an operating order from the operational assembly 28, in the form of an emission of oil sent by one of the control electrovalves 26 through the conduits 30 and 31 towards the valves 8 and 12.
  • the piston 42 moves, impelled by the oil, and, when the control system is used with a switch, engages the switch in closed position, for instance against a disengagement spring.
  • the obturator 60 With the pilot pressure released, the obturator 60 rises and puts the jack into communication with the intermediate tank 14, where the oil under low pressure is temporarily accumulated before returning via the small cross-section conduit 32 to the main tank 25, from where it is drawn by pump P.
  • the two said electromagnetic valves may be mounted directly on the inlet and purge members in the functional assembly, which permits a reduction in the times for sending orders.
  • conduits 30, 31 for sending hydraulic orders it is important for the small cross-section conduits, especially the conduits 30, 31 for sending hydraulic orders, to be free of air, to ensure speed and simultaneously transmit orders.
  • the conduits are preferably supplied with automatic air-purging means, for instance of the type described in French Patent 1,230,514.
  • An hydraulic remote control system including a cylinder having an operating piston reciprocable therein, said cylinder being provided with an inlet port to admit liquid under pressure to one face of the piston to drive the piston in one direction, said cylinder having an outlet port to remove the pressure liquid from the one face of the piston, a remote controlled admission valve, said admission valve having a casing provided with inlet and outlet ports, said casing being secured to the cylinder with the inlet port thereof in axial alignment with the outlet port of the casing, a remote controlled exhaust valve, said exhaust valve having a casing provided with inlet and discharge ports, said exhaust valve casing being secured to the cylinder with the outlet port thereof in axial alignment with the inlet port of the exhaust valve casing, 21 hydropneumatic accumulator having a pressure liquid compartment provided with an inlet port and an outlet port, the accumulator being secured to the admission valve casing with the outlet port of the pressure liquid compartment in axial alignment with the inlet port of the admission valve casing, a main pressure liquid reservoir, a source of liquid under pressure connected to the reservoir
  • said admission valve comprises a movable valve actuating member operable in response to liquid pressure to cause opening of the admission valve and in which said exhaust valve comprises a movable valve actuating member operable in response to liquid pressure to cause closing of the exhaust valve
  • said system further including third conduit. means connecting the valve actuating member of the admission valve and the valve actuating member of the exhaust valve in series to said discharge side of the source, and electromagnetically operable valve means in said third conduit means for controlling the flow of pressure liquid from the delivery side of the source to said series connected valve actuating members.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Motors (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US00197809A 1970-11-23 1971-11-11 High power hydraulic control systems for an electric switch Expired - Lifetime US3766343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7041926A FR2115506A5 (ko) 1970-11-23 1970-11-23

Publications (1)

Publication Number Publication Date
US3766343A true US3766343A (en) 1973-10-16

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ID=9064538

Family Applications (1)

Application Number Title Priority Date Filing Date
US00197809A Expired - Lifetime US3766343A (en) 1970-11-23 1971-11-11 High power hydraulic control systems for an electric switch

Country Status (12)

Country Link
US (1) US3766343A (ko)
JP (1) JPS535993Y2 (ko)
AT (1) AT316681B (ko)
BE (1) BE775684A (ko)
CA (1) CA942625A (ko)
CH (1) CH545424A (ko)
DE (1) DE2157154A1 (ko)
FR (1) FR2115506A5 (ko)
GB (1) GB1367688A (ko)
IT (1) IT945071B (ko)
NL (1) NL7115098A (ko)
SE (1) SE376052B (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187339A (en) * 1990-06-26 1993-02-16 Merlin Gerin Gas insulated high-voltage circuit breaker with pneumatic operating mechanism
EP1406278A3 (en) * 2002-10-04 2006-05-03 Hitachi, Ltd. Gas insulated switchgear

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616914C2 (de) * 1986-05-20 1994-05-05 Mitsubishi Electric Corp Hydrauliksteuerventilanordnung
JP4280457B2 (ja) 2002-04-18 2009-06-17 勝行 戸津 ねじ保持形ドライバービット及びねじとの組合せ
FR2996892B1 (fr) * 2012-10-16 2015-11-06 Technip France Ensemble d'amortissement pour une installation au moins en partie immergee dans une etendue d'eau, installation et procede associes
CN111594492A (zh) * 2020-05-27 2020-08-28 珠海方博科技有限公司 一种用于地面服务系统的控制方法及系统

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408199A (en) * 1941-09-13 1946-09-24 Westinghouse Electric Corp Circuit breaker
FR1098565A (fr) * 1954-01-15 1955-08-08 Dispositif de commande hydraulique pour disjoncteur, ou analogue
US2813177A (en) * 1954-03-29 1957-11-12 Kelman Electric And Mfg Compan Circuit breaker
US2861144A (en) * 1957-07-08 1958-11-18 Gen Electric Stored energy type closing device for an electric circuit breaker
FR1181985A (fr) * 1957-09-04 1959-06-19 Perfectionnements aux installations de commande hydraulique
US2900469A (en) * 1954-01-15 1959-08-18 Gratzmuller Jean Louis Circuit-breaker control device
FR1230514A (fr) * 1959-03-06 1960-09-16 Dispositif de commande hydraulique à purge d'air automatique
FR1309328A (fr) * 1961-09-27 1962-11-16 Alsthom Cgee Commande hydropneumatique pour disjoncteurs électriques
FR1350707A (fr) * 1962-11-16 1964-01-31 Installation de commande hydraulique à réponse rapide
US3133475A (en) * 1960-11-22 1964-05-19 Gen Electric Hydraulically-actuated operating mechanism for an electric circuit breaker
US3239636A (en) * 1962-12-20 1966-03-08 Bbc Brown Boveri & Cie Electrical switch having rotary movable contact with vane piston contact actuating means
US3345487A (en) * 1965-02-16 1967-10-03 Westinghouse Electric Corp Hydraulically operated circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1873787A (en) * 1929-11-26 1932-08-23 Gen Electric Electric switch operating mechanism
US2658969A (en) * 1950-04-17 1953-11-10 Pacific Electric Mfg Corp Hydraulic circuit breaker actuating mechanism
FR1104071A (fr) * 1954-04-26 1955-11-16 Cie Gen Equip Aeronautique Perfectionnements aux commandes d'interrupteurs électriques
FR1135122A (fr) * 1955-11-04 1957-04-24 Jean Louis Gratzmuller Dispositif de commande hydraulique à contrôle de vitesse, pour disjoncteur
US3075060A (en) * 1957-10-30 1963-01-22 Westinghouse Electric Corp Circuit interrupters
FR73695E (fr) * 1958-06-06 1960-09-05 Comp Generale Electricite Procédé de commande oléopneumatique d'appareil électrique et application à un disjoncteur
FR1203632A (fr) * 1958-11-12 1960-01-20 Comp Generale Electricite Procédé de commande oléopneumatique d'appareil électrique et application à un disjoncteur
FR1349314A (fr) * 1962-12-03 1964-01-17 Perfectionnements apportés au circuit de purge des vérins hydrauliques pour disjoncteurs

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408199A (en) * 1941-09-13 1946-09-24 Westinghouse Electric Corp Circuit breaker
FR1098565A (fr) * 1954-01-15 1955-08-08 Dispositif de commande hydraulique pour disjoncteur, ou analogue
US2900469A (en) * 1954-01-15 1959-08-18 Gratzmuller Jean Louis Circuit-breaker control device
US2813177A (en) * 1954-03-29 1957-11-12 Kelman Electric And Mfg Compan Circuit breaker
US2861144A (en) * 1957-07-08 1958-11-18 Gen Electric Stored energy type closing device for an electric circuit breaker
FR1181985A (fr) * 1957-09-04 1959-06-19 Perfectionnements aux installations de commande hydraulique
FR1230514A (fr) * 1959-03-06 1960-09-16 Dispositif de commande hydraulique à purge d'air automatique
US3133475A (en) * 1960-11-22 1964-05-19 Gen Electric Hydraulically-actuated operating mechanism for an electric circuit breaker
FR1309328A (fr) * 1961-09-27 1962-11-16 Alsthom Cgee Commande hydropneumatique pour disjoncteurs électriques
FR1350707A (fr) * 1962-11-16 1964-01-31 Installation de commande hydraulique à réponse rapide
US3239636A (en) * 1962-12-20 1966-03-08 Bbc Brown Boveri & Cie Electrical switch having rotary movable contact with vane piston contact actuating means
US3345487A (en) * 1965-02-16 1967-10-03 Westinghouse Electric Corp Hydraulically operated circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187339A (en) * 1990-06-26 1993-02-16 Merlin Gerin Gas insulated high-voltage circuit breaker with pneumatic operating mechanism
EP1406278A3 (en) * 2002-10-04 2006-05-03 Hitachi, Ltd. Gas insulated switchgear

Also Published As

Publication number Publication date
IT945071B (it) 1973-05-10
GB1367688A (en) 1974-09-18
SE376052B (ko) 1975-05-05
JPS535993Y2 (ko) 1978-02-15
BE775684A (fr) 1972-05-23
CH545424A (fr) 1973-12-15
NL7115098A (ko) 1972-05-25
AT316681B (de) 1974-07-25
JPS47596U (ko) 1972-08-03
FR2115506A5 (ko) 1972-07-07
CA942625A (en) 1974-02-26
DE2157154A1 (de) 1972-05-25

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