US3129307A - Device for accelerating the disconnection of electric switches and for extinguishing their arc - Google Patents

Device for accelerating the disconnection of electric switches and for extinguishing their arc Download PDF

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Publication number
US3129307A
US3129307A US102418A US10241861A US3129307A US 3129307 A US3129307 A US 3129307A US 102418 A US102418 A US 102418A US 10241861 A US10241861 A US 10241861A US 3129307 A US3129307 A US 3129307A
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Prior art keywords
current conducting
switch
switch means
arc
current
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US102418A
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English (en)
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Vargas Jose Munoz De
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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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/06—Insulating body insertable between contacts

Definitions

  • This invention relates to electric switches and, in particular, to a process by which extremely high connectionspeeds are obtained therein, this high speed, combined with a tight seal produced in accordance with the invention, enabling the formation of the arc to be prevented, because there is insufiicient space for the arc to form, it being of advantage to install the system of contacts in an enclosed chamber, filled with inert dry gas, thus ensuring that rust does not form on the contacts and that the internal insulation of the apparatus does not suffer deterioration as a result of damp.
  • Circuit-breakers have to perform the maximum of work when they disconnect by a short circuit.
  • the limit of the operating-capacity of a switch is its rupturing power, which depends on the characteristics of the current, on the disconnection-speed, on the area and shape of the contacts and on the medium in which the break takes place (air, oil, a magnetic field, etc.).
  • the purpose of the invention is to remove these drawbacks from the known systems.
  • the invention provides for a process consisting of increasing the disconnection-speed of electric switches to a considerable extent (an object which can be achieved by reducing the Weight of the moving parts to a minimum) and of automatically interposing between the contacts an incombustible solid insulating body, all of which enables the creation of the arc to be prevented, because when the said insulating body is interposed at a very high speed a tight seal is thereby provided between the two contacts, preventing any current from passing and therefore preventing the are from forming.
  • the contacts of the switch are situated, diametrically opposite to each other, in an insulating-cylinder, and the circuit is closed by means of a number of rings or segments of a material which is a good conductor of electricity, which said devices break the circuit when they are displaced, while their place is occupied by an insulating body, such as asbestos, which, owing to the high speed of movement and the pressure exerted by the packing of asbestos against the walls of the cylinder, produces between the contacts a tight seal which prevents the current from flowing.
  • an insulating body such as asbestos
  • the disconnecting-mechanism is operated by a spring which is locked or released by a pawl.
  • the contacts of the switch consist of concentric tubular parts, the diameter and thickness of the tubes depending solely on the cross section required for the passage of the current, the friction thus being reduced to such an extent thatthe system can be operated by low current electron-magnets instead of by springs.
  • FIG. 1 is a sectional elevation, for thefir'st constructional version of thejinvention, of the cylinder forming the body of the switch;
  • FIG, 11 is ahorizontal sectional drawingrcorresponding to FIG. 1;
  • FIG. 2 represents the piston accommodated inside the cylinder, this being a vertical sectional elevation
  • FIG. 2a is a horizontal sectional drawing corresponda F G- FIG. 3 is a sectional elevation of the complete switch in the closed-circuit position;
  • FIG.. 4 is a sectional elevation corresponding to FIG. 3 and showing the start of the disconnection movement
  • FIG. 5 is a similar diagram of'the switchafter complete disconnection
  • FIG. 6 is a similar diag am of the final phase of the disconnection
  • FIG. 7, which relates to the second constructional 'version of the invention, is a sectional clevational representing the cylinder, with its piston and, bellows, and the connecting-rod and lever with the electroamagnets for the operation of the device, in the connected position;
  • FIG. 8 is a partial sectional elevation corresponding to FIG. 7, and represents the upper part of the cylinder and piston at the start of the disconnection; 4
  • FIG. '9 is ascction or the cylinder "andth'e' piston, along the line 99 of FIG. 8;
  • FI G..-10.' is a sectionalfelevation representing, the cylinder and the piston in the disconnected position.
  • the switch or phase. of a switch shown therein consists of a tube 1 of a hard, highly insulant and incornbustible material, such. as the synthcticresinknohvn. as, araldite, and that the four parts 2., 2', of a "material which is a good conductor of electricity, such as copper, are rigidly embedded 'in the said tube.
  • Each of these parts 2 is connected to the conne'c'ting terminals 3 and 4, the first one being the cur-, rent-input connection-terminal and the other, 4, on the same side, being the current-output terminal.
  • the parts 2 on the opposite side are electrically bridged by the part 5, which must obviously be -a good conductor of electricity likewise.
  • The-internal surface of the tube 1, with the four embeddedparts 2, forms a smooth assembly without projecting parts or edges, like the cylinder of an explosion-motor.
  • this shows the construction of the piston 6, of the same material as the tube 1, twosegments 7 and 7' of elastic and conductive material, such as hardened copper, being movabl y accommodated in the said piston and functioning similar to the pistonsegrnents of an explosion-engine, that is to say,- being vigorously pressed against the internal walls of the cylin-. der 1.
  • These segments 7, 7, have a recess 21 to ensure better contact between the segments; and theparts 2, very ample contact-surfaces thus being obtainable.
  • packings or segments S ot a highly insulant and incombustible materialsuchas asbestos or suitable synthetic resin are accommodated in the same manner in the piston 6 and fit firmly against the internal surface of the tube 1, forming the most complete seal possible.
  • the piston 6 extends atthe bottom in the form of a tube 9, at the top of which there is an orifice 10 to enable a helicoidal spring 111 (see FIG; 3) to engage in it.
  • To the top of the piston 6 is affixed an operatingrod 12 with a projection 13 to accommodate a pawl.
  • FIG. 3 it is shown in the connected position.
  • the current enters through the terminal 3, passes to the part 2 and thence through the segments 7 and '7 to the opposite part2, which in turn transmits it through 5 to 2'.
  • the current passes via, the segments 17 and 17' to the opposite part 2" and thence to the output-terminal 4.
  • This first constructional version of the invention thus provides a switch with an extremely quick break, by reducing thetorces of inertia to a minimum, since the only part in motion is the piston 6 with its free connection-rod 12,-of a light-weight material; the connection is as rapid as the break.
  • the piston 6 is connected, and at rest, when the piston 16 is moved to the connecting-position.
  • the overload-relay acts on the pawl 15 and trips it, without any change of movement, because it is in its position of rest, and without any obstacle in its disconnection-travel, until after the disconnection has taken place.
  • the piston in its dual function of contactor and insulating and sealing element, must have the physical characteristics required to enable it to stand up to the task demanded of the switch of which it forms a part; in other words, its dimensions, the quality of the materials of which it is made, and the number of its segments, both the conductive ones and the insulant ones, will depend on the current-characteristics and the rupturing-capacity required. No further explanatory remarks are required in this connection, the subject being known to electrical engineers.
  • the weight of the contact-parts is very moderate.
  • the contact-area is very ample, temperature-rises thus being obviated.
  • the disconnection-time is far shorter than at present, since there are no parts which successively have to change their direction of motion, this being a most important factor in the re-connection operation necessitated by short circuits.
  • a tube of hard mechanizable insulating material such as araldite resin in which two tubular parts 2 and 2', of a highly conductive material such as hardened copper, which are connected to the electric circuit by the terminals 3 and 4, are rigidly embedded.
  • the inside of the three tubes 1, 2 and 2' forms a smooth surface without projections, like the jacket of the cylinder of an explosion-engine.
  • a movable bridge 17 consisting of two cylindrical halves of a highly conductive material, such as hard copper, its circumference at its upper and lower extremities being exactly equal to the interior of the tubular parts 2, 2, the said movable bridge being, vigorousiy pressed against the walls of .2, 2 by the action of powerful springs 25, which may, for example, be made of hardened steel.
  • the movable bridge 17 electrically bridges the input circuit 2 with the output circuit 2' when the switch is connected.
  • FIGS. 7 and 8 are compared it will be seen how the packing 8 has been compressed on the sudden descent of the rod 6, forming a perfect seal between the surfaces of the chamber.
  • the rod 6 has a widened part 27 at the bottom, to which said pant is affixed, by way of a closing-device, one of the ends of a bellows 28, of insulating-material, such as rubber or a suitable plastic.
  • the other end of the bellows is affixed in a similar manner to the lower end of the tube 2', thus forming a tight chamber with the cylinder.
  • the switch is operated by means of the lever 29, rigidly connected to the shaft 311, which is common to the various phases of which the switch consists and which transmits its movement to the rod 6 via the connectingrod 31.
  • the iron lever 29 can be acted upon by one of the electro-magnets 32 or 33, for the connectingor breaking-action.
  • the assembly consisting of the rod 6, the movable bridge 17 and the packing 8 will be termed the piston.
  • FIG. 7 it is in the connected position.
  • the current passes from the terminal 3 to the cylinder 2 and, via the movable bridge 17, to the tube 2' and to the output-terminal 4.
  • the bellows 28 is com-pressed, and the two electro-magnets 32 and 33 are disconnected.
  • the switch is held in the connected or disconnected position by any of the processes already known to electrical engineers for automatically maintaining certain limit positions, e.g. by a spring-loaded ball.
  • the electro'magnet 33 is excited. It instantaneously attracts the lever 29 until the position shown by a broken line in FIG. 7 is reached.
  • FIG. 10 shows the switch in the disconnected position, and the sealing action produced by the packing 8, when compressed, is clearly illustrated in this diagram.
  • the interior of the cylinder, as well as the chamber formed by the bellows, are filled with an inert dry gas, such as nitrogen, at a pressure slightly above atmospheric.
  • an inert dry gas such as nitrogen
  • the coils of the electro-magnets 32 and 33 are only under low tension during the moment taken by the piston to move.
  • This process enables extremely short re-connecting times to be obtained.
  • the sections of the cylinders 2 and 2', as Well as those of the movable bridge 17, depends on the intensity of the current at which the switch has to operate.
  • the thickness of insulation 35 between the edges of 2 and 2', as well as the length of the movable bridge 17, the dimensions of the packing 8 and the characteristics of the insulating-rod 31 depend on the working voltage.
  • this system enables very inexpensive circuitbreakers with a re-connecting device to be constructed, since the work which has to be done by the electro-rnagnet is practically negligible, and all that is required to ensure the re-connection is to instal a simple clockwork or bi-metal system to connect the coil 33 a short time after the switch has been disconnected.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said current conducting switch member by one of said means in a manner whereby in a second position of said switch means said substantially elastic electrical insulating material is positioned in compressed state between said current conducting means and said current conducting switch member so as to prevent formation of any arc and forms a substantially tight seal between the same;
  • control means for automatically moving said switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said current conducting switch member in position between said current conducting means and said current conducting switch member upon movement of said switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said current conducting switch member by one of said means in a manner whereby in a second position of said switch means said substantially elastic electrical insulating material is positioned in compressed state between said current conducting means and said current conducting switch member so as to prevent formation of an arc and forms a substantially tight seal between the same;
  • control means for automatically moving said switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously is positioned in compressed state between said current conducting means and said current conducting switch member upon movement of said switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said first current conducting switch member by one of said switch means in a manner whereby in a second position of said one of said switch means said substantially elastic electrical insulating material is positioned in compressed state between said first current conducting means and said first current conducting switch member so as to prevent formation of an arc and forms a substantially tight seal between the same;
  • control means for automatically moving said first switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said first current conducting switch member in position between said first current conducting means upon movement of said first switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said first current conducting switch member by said first switch means in a manner whereby in a second position of said first switch means said substantially elastic electrical insulating material is positioned in compressed state between said first current conducting means and said first current conducting switch member so as to prevent format-ion of an arc and forms a substantially tight seal between the same;
  • spring biased control means for automatically moving said first switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said first current conducting switch member in position between said first current conducting means upon movement of said first switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in com bination,
  • substantially elastic electrical insulating material immovably supported adjacent said first current conducting switch member by said first switch means in a manner whereby in a second position of said first switch means said substantially elastic electrical insulating material is positioned in compressed state between said first current conducting means and said first current conducting switch member so as to prevent formation of an arc and forms a substantially tight seal between the same;
  • control means for automatically moving said first switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said first current conducting switch member in position between said first current conducting means upon movement of said first switch means from its first to its second position, and for automatically moving said first switch means from its second position to a third position in which said first switch means is spaced from and open circuits said first pair of spaced current conducting means, said control means automatically moving said second switch means from its first position to a second position in which it is spaced from and open circuits said second pair of spaced current conducting means at substantially the same time that it moves said first switch means from its second to its third position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said first current conducting switch member by said first switch means in a manner whereby in a second position of said first switch means said substantially elastic electrical insulating material is positioned in compressed state between said first current conducting means and said first current conducting switch member so as to prevent formation of an arc and forms a substantially tight seal between the same;
  • electrical conducting means connecting said first and second pairs of spaced current conducting means in a manner whereby in the first position of said switch means the said first and second pairs of spaced current conducting means form a single closed circuit having a single input terminal and a single output terminal;
  • control means for automatically moving said first switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said first current conducting switch member in position between said first current conducting means upon movement of said first switch means from its first to its second position and for automatically moving said first switch means from its second posi tion to a third position in which said first switch means is spaced from and open circuits said first pair of spaced current conducting means, said control means automatically moving said second switch means from its first position to a second position in which it is spaced from and open circuits said second pair of spaced current conducting means at substantially the same time that it moves said first switch means from its second to its third position; and
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • substantially elastic electrical insulating material immovably supported adjacent said first current conducting switch member by said first switch means in a manner whereby in a second position of said first switch means said substantially elastic electrical insulating material is positioned in compressed state between said first current conducting means and said first current conducing switch member so as to prevent formation of an arc and forms a substantially tight seal between the same;
  • electrical conducting means connecting said first and second pairs of spaced current conducting means in a manner whereby in the first position of said switch means the said first and second pairs of spaced cur rent conducting means form a single closed circuit having a single input terminal and a single output terminal;
  • control means for automatically moving said first switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said first current conducting switch member in position between said first current conducting means upon movement of said first switch means from its first to its second position and for automatically moving said first switch means from its second position to a third position in which said first switch means is spaced from and open circuits said first pair of spaced current conducting means, said control means automatically moving said second switch means from its first position to a second position in which it is spaced from and open circuits said second pair of spaced current conducting means at substantially first and second pairs of spaced current conducting means;
  • a movable electrically conductive bridge member supported by said switch means in a manner whereby said bridge member is positioned between and short circuits each of said first and second pairs of current conducting means thereby to provide a single closed circuit having a single input terminal and a single output terminal when said switch means is in its first position;
  • substantially elastic electrical insulating material immovably supported adjacent said bridge member by said switch means in a manner whereby in a second position of said switch means said substantially elastic electrical insulating material is positioned in compressed state between said first pair of spaced current conducting means so as to prevent formation of an arc and forms a substantially tight seal between said first pair of current conducting means;
  • control means for automatically moving said switch means from its first to its second position instantaneously so that said substantially elastic electrical insulating material instantaneously replaces said bridge member in position between said first pair of current conducting means upon movement of said switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • a movable electrically conductive bridge member supported by said switch means in a manner whereby said bridge member is positioned between and short circuits each of said first and second pairs of current conducting means thereby to provide a single closed circuit having a single input terminal and a single output terminal when said switch means is in its first position;
  • substantially elastic electrical insulating material immovably supported adjacent said bridge member by I said switch means in a manner whereby in a second position of said switch means said substantially elastic electrical insulating material is postioned in compressed state'between said first pair of spaced current conducting means so as to prevent formation of an arc and forms a substantially tight seal between said first pair of current conducting means;
  • electromagnetic control means for automatically moving said switch means from its first to its second position instantaneously so that said substantially elastic electrical'insulating material instantaneously replaces said bridge member in position between said first pair of current conducting means upon movement of said switch means from its first to its second position.
  • a device for accelerating electric switching and preventing the formation of an arc comprising, in combination,
  • a housing having an inert dry gas therein;
  • a movable electrically conductive bridge member positioned in said housing and supported by said switch means in a manner whereby said bridge member is positioned between and short circuits each of said first and second pairs of current conducting means thereby to provide a single closed circuit having a single input terminal and a single output terminal when said switch means is in its first position;
  • substantially elastic electrical insulating material immovably supported adjacent said bridge member by said switch means in a manner whereby in a second position of said switch means said substantially elastic electrical insulating material is positioned in compressed state between said first pair of spaced current conducting means so as to prevent formation of an arc and forms a substantially tight seal between said first pair of current conducting means;

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US102418A 1960-04-13 1961-04-12 Device for accelerating the disconnection of electric switches and for extinguishing their arc Expired - Lifetime US3129307A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES0257342A ES257342A1 (es) 1960-04-13 1960-04-13 Un procedimiento para acelerar la desconexiën de interruptores electricos y evitar la formaciën del arco de ruptura
ES26574261 1961-03-14

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430014A (en) * 1965-09-20 1969-02-25 Allen Bradley Co Modular electric switch
US3466579A (en) * 1966-08-19 1969-09-09 Massachusetts Inst Technology High speed switching devices
US3792215A (en) * 1972-05-17 1974-02-12 Westinghouse Electric Corp Electrical load-break apparatus
US4250365A (en) * 1978-03-22 1981-02-10 Electric Power Research Institute, Inc. Current interrupter for fault current limiter and method
US4329554A (en) * 1980-01-07 1982-05-11 Huber William J Loadbreak arc snuffing device
US4342978A (en) * 1979-03-19 1982-08-03 S&C Electric Company Explosively-actuated switch and current limiting, high voltage fuse using same
US4370531A (en) * 1980-09-19 1983-01-25 S&C Electric Company Electric switch and improved device using same
US4490707A (en) * 1980-08-18 1984-12-25 S&C Electric Company Explosively-actuated, multi-gap high voltage switch
US4494103A (en) * 1980-08-18 1985-01-15 S&C Electric Company High-speed, multi-break electrical switch
US4562323A (en) * 1983-02-04 1985-12-31 La Telemecanique Electrique Switch device having an insulating screen inserted between the contacts during breaking and means for shearing the arc between this screen and an insulating wall
US4572933A (en) * 1983-08-22 1986-02-25 S&C Electric Company Pressure-operated switch for a high-voltage interrupting module
USRE32321E (en) * 1980-09-19 1986-12-30 S&C Electric Company Electric switch and improved device using same
US4692577A (en) * 1985-10-25 1987-09-08 S&C Electric Company Switch for a high-voltage interrupting module
US5504289A (en) * 1994-03-30 1996-04-02 Abb Power T&D Company Inc. Circuit switching mechanism and charging system therefor
US5508487A (en) * 1994-03-30 1996-04-16 Abb Power T&D Company Inc. High voltage circuit interrupting device operating mechanism including trip latch assembly
EP0788126A1 (fr) * 1996-02-02 1997-08-06 ABB Research Ltd. Interrupteur haute tension
US20080191830A1 (en) * 2004-09-09 2008-08-14 Lisa Dräxlmaier GmbH Load Shedder
US20100073120A1 (en) * 2007-03-26 2010-03-25 Robert Bosch Gmbh Thermal fuse for use in electric modules
CN101595543B (zh) * 2006-10-18 2011-11-02 阿雷瓦T&D股份公司 用于控制电气设备的装置
US20150102875A1 (en) * 2012-04-12 2015-04-16 Razvojni Center Enem Novi Materiali D.O.O. Switch for protection of electric circuit against overloading
EP4120307A1 (fr) * 2021-07-12 2023-01-18 ABB S.p.A. Appareil de commutation pour grilles électriques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941957A (en) * 1974-05-09 1976-03-02 Tilman Ted N High current high voltage switch structure with conductive piston

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US649554A (en) * 1899-04-08 1900-05-15 Ferdinand Schwedtmann Electric switch.
US751028A (en) * 1904-02-02 Means for extinguishing electric arcs
US2284347A (en) * 1938-09-08 1942-05-26 Westinghouse Electric & Mfg Co Circuit interrupter
US2477837A (en) * 1944-08-25 1949-08-02 Westinghouse Electric Corp Circuit interrupter
US2888540A (en) * 1953-03-30 1959-05-26 Gratzmuller Jean Louis Circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US751028A (en) * 1904-02-02 Means for extinguishing electric arcs
US649554A (en) * 1899-04-08 1900-05-15 Ferdinand Schwedtmann Electric switch.
US2284347A (en) * 1938-09-08 1942-05-26 Westinghouse Electric & Mfg Co Circuit interrupter
US2477837A (en) * 1944-08-25 1949-08-02 Westinghouse Electric Corp Circuit interrupter
US2888540A (en) * 1953-03-30 1959-05-26 Gratzmuller Jean Louis Circuit breaker

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430014A (en) * 1965-09-20 1969-02-25 Allen Bradley Co Modular electric switch
US3466579A (en) * 1966-08-19 1969-09-09 Massachusetts Inst Technology High speed switching devices
US3792215A (en) * 1972-05-17 1974-02-12 Westinghouse Electric Corp Electrical load-break apparatus
US4250365A (en) * 1978-03-22 1981-02-10 Electric Power Research Institute, Inc. Current interrupter for fault current limiter and method
US4342978A (en) * 1979-03-19 1982-08-03 S&C Electric Company Explosively-actuated switch and current limiting, high voltage fuse using same
US4329554A (en) * 1980-01-07 1982-05-11 Huber William J Loadbreak arc snuffing device
US4490707A (en) * 1980-08-18 1984-12-25 S&C Electric Company Explosively-actuated, multi-gap high voltage switch
US4494103A (en) * 1980-08-18 1985-01-15 S&C Electric Company High-speed, multi-break electrical switch
US4370531A (en) * 1980-09-19 1983-01-25 S&C Electric Company Electric switch and improved device using same
USRE32321E (en) * 1980-09-19 1986-12-30 S&C Electric Company Electric switch and improved device using same
US4562323A (en) * 1983-02-04 1985-12-31 La Telemecanique Electrique Switch device having an insulating screen inserted between the contacts during breaking and means for shearing the arc between this screen and an insulating wall
US4572933A (en) * 1983-08-22 1986-02-25 S&C Electric Company Pressure-operated switch for a high-voltage interrupting module
US4692577A (en) * 1985-10-25 1987-09-08 S&C Electric Company Switch for a high-voltage interrupting module
US5504289A (en) * 1994-03-30 1996-04-02 Abb Power T&D Company Inc. Circuit switching mechanism and charging system therefor
US5508487A (en) * 1994-03-30 1996-04-16 Abb Power T&D Company Inc. High voltage circuit interrupting device operating mechanism including trip latch assembly
EP0788126A1 (fr) * 1996-02-02 1997-08-06 ABB Research Ltd. Interrupteur haute tension
US20080191830A1 (en) * 2004-09-09 2008-08-14 Lisa Dräxlmaier GmbH Load Shedder
US7772958B2 (en) * 2004-09-09 2010-08-10 Lisa Dräxlmaier GmbH Load shedder
CN101595543B (zh) * 2006-10-18 2011-11-02 阿雷瓦T&D股份公司 用于控制电气设备的装置
US20100073120A1 (en) * 2007-03-26 2010-03-25 Robert Bosch Gmbh Thermal fuse for use in electric modules
US20150102875A1 (en) * 2012-04-12 2015-04-16 Razvojni Center Enem Novi Materiali D.O.O. Switch for protection of electric circuit against overloading
US9275816B2 (en) * 2012-04-12 2016-03-01 Ravojni Center Enem Novi Materiali D.O.O. Switch for protection of electric circuit against overloading
EP4120307A1 (fr) * 2021-07-12 2023-01-18 ABB S.p.A. Appareil de commutation pour grilles électriques
US12224144B2 (en) 2021-07-12 2025-02-11 Abb S.P.A. Switching apparatus for electric grids

Also Published As

Publication number Publication date
CH374106A (fr) 1963-12-31
GB930980A (en) 1963-07-10

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