US3300610A - Anti-restriking oil circuit breaker having an anti-cavitation device - Google Patents

Anti-restriking oil circuit breaker having an anti-cavitation device Download PDF

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US3300610A
US3300610A US117363A US11736361A US3300610A US 3300610 A US3300610 A US 3300610A US 117363 A US117363 A US 117363A US 11736361 A US11736361 A US 11736361A US 3300610 A US3300610 A US 3300610A
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Prior art keywords
movable contact
contact means
oil
circuit breaker
injection pot
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US117363A
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English (en)
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Adrien W Roth
Catella Albert
Nicoud Gilbert
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Alcatel Lucent SAS
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Compagnie Generale dElectricite SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/92—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil

Definitions

  • the present invention relates to a circuit breaker and more particularly to a high-voltage, small oil-volume circuit breaker provided with anti-restriking means and with a control mechanism controlling the opening speed of the circuit breaker to permit proper operation thereof irrespective of the nature of the overload causing actuation of the circuit breaker.
  • the forced blast in addition to requiring the use of relatively powerful pumps and leading to a rather complicated installation, presents the inconvenience of increasing the over-voltages or voltage surges with the interruption of small inductive currents; in effect, in the case of small inductive currents, and contrary to that which takes place in the case of capacitive currents, the voltage surges are caused by the brutal cancellation or draw-out of the current prior to its natural passage through zero, and the forced blast multiplies, to a very high proportion, the current draw-out capacity by the circuit breaker; the forced blast, therefore, finds itself at the origin of voltage surges of which the amplitude can be reduced only by the use of auxiliary damping resistances.
  • the present invention avoiding recourse to the forced blast, has turned to opening speeds much higher than those realized to date and proposes means to obtain this high speed while at the same time avoiding the inconveniences which could result from this high speed such as causing a phenomenon of cavitation behind the movable contact.
  • the present invention has as its object a high voltage circuit breaker with a small oil volume in which, in the position of closure, the rod of the movable contact and the fixed contact fingers are disposed on the inside of an oil-injection pot closed by a spark-arrester cover characterized in that, toward the end of closure of the circuit breaker, the rod of the movable contact has its movement damped by the arming force which it exerts on an energy accumulator or energy storage device, which at the beginning of opening imparts a very high speed to the movable contact and injects over the same a current of anti-cavitation oil during the entire duration of possible restrikings in case of capacitive interruption.
  • Still another object of the present invention resides in the provision of a circuit breaker of universal applicability insofar as the interrupted current is concerned which is relatively inexpensive and which achieves such versatility by simple and inexpensive means.
  • Still a further object of the present invention resides in the provision of a circuit breaker utilizing a high open: ing speed to achieve the purposes and functions described hereinabove.
  • Another object of the present invention resides in the provision of a circuit breaker of the type mentioned hereinabove which utilizes a cavitation-compensating means to compensate for the cavitational effects produced by the high opening speeds used in the circuit breaker without the disadvantages normally encountered with oil blasts or the like.
  • a further object of the present invention resides in the provision of a circuit breaker which obviates the need for forced blasts to regenerate the dielectric strength in the space behind the contact.
  • Still a further object of the present invention resides in the provision of a circuit breaker operative to interrupt not only capacitive currents but also small inductive currents without the side effects of voltage surges and without the need of auxiliary damping resistances.
  • Still another object of the present invention resides in the provision of a circuit breaker operative to effectively interrupt, not only short circuit currents and capacitive currents, but also small indicative currents without the necessity of complicated constructional details and complex operational aspects.
  • FIGURE 1 is an elevational cross sectional view through an anticavitation device in accordance with the present invention mounted on the fixed contact structure of the circuit breaker.
  • FIGURE 2 is a cross sectional view taken along line IIII of FIGURE 1, and
  • FIGURE 3 is a schematic diagram of a circuit breaker and control mechanism according to the present invention provided with means necessary to produce, .at the opportune moment, a slow down of the opening speed of the rod of the movable contact.
  • FIG. 4 is a diagram showing contact movement plotted against time.
  • FIG. 5 is an illustration of a conventional circuit breaker arrangement having a plurality of interrupting chambers connected in series.
  • opening speed is to be interpreted as the product of the speed of the rod of the interrupting chamber by the number of interrupting chambers, it being understood that the present invention relates to circuit breakers with a very high opening speed regardless of whether this opening high speed is obtained only by the increase of speed of the rod or also by that of the number of interruptions.
  • the anti-cavitation device which causes the oil to penetarte through orifices into the space subjected to cavitation is regulated in such a manner as to compensate essentially for this'cavitation without producing eddying or swirls; such eddying or swirls would constitute in effect a forced blast which is the source of the shortcomings mentioned hereinabove.
  • the anti-cavitation device provided by the present invention additionally, offers certain advantages which will result from the description that will follow.
  • FIGURE 4 represents a diagram in which time is plotted along the abscissa and the distances of travel of the movable contact member 12 are plotted along the ordinate.
  • the curve a represents the diagram of the time to the frequency of the network into which the circuit breaker is installed.
  • Line b intersecting the curve 1 at point M rep-resents the position of a movable contact member 12 in the position illustrated in FIGURE 1 in which it abuts abainst the tubular member 2.
  • Lince c intersecting the curve It at point N indicates the distance traversed and time elapsed from the position of movable contact 12 in the armed condition of the circuit breaker to the instance when the contacts 12, 1 of the circuit breaker separate.
  • Line d indicates the position of the movable contact 12 for which the interruption of the capacitive current is terminated with certainty, the movable contact 12 having traversed a distance d from th ep-osition N at the moment of separation of the movable and fixed contacts 12, 1.
  • Line e which intersects the curve 1 in point 0 corresponds to the position of the movable contact 12 for which the interruption of the short-circuit current becomes possible, the movable contact 12 having traversed a distance oi for the moment of separation of the contacts 12, 1 represented by line c, with a lapsed of time equal to t
  • Line which intersects curve 1 in point P corresponds to the position normally attained by the movable part 12 a period of the frequency cycle after it has attained the position :1 the distance traversed by the movable contact 12 since the separation of the contacts 12, 1 now amounting to d and the time elapsed being equal to
  • the time t corresponds to a passage through zero of the current of interruption-different from the curve a which does not rep-resent the current of interruption but only a time diagram independent of the current of interruptionwhich takes passage through zero place between the positions d and d
  • the movable contact 12, reaching the distance d at time t is represented by the point 0.
  • T is the period of the alternating current, such passage through zero will necessarily occur at a moment 1 comprised between t and t -i-T, T being equal to 0.02 second in the case of a fifty cycles per second alternating current and 0.0167 second in the case of a sixty cycles per second alternating current.
  • V is the speed of the movable contact 12
  • the distance d is much greater than d whereby the energy realized by the arc in the course of the interruption at the distance d may be very high, the energy related by the arc in the course of the interruption at the distance d may be very great which renders more difficult the construction of the circuit breaker.
  • the circuit breaker according to the present invention does not entail this inconvenience, for it is actuated in such a manner that the speed of the rod, very high at the moment of the separation of the contacts, is brought back to a value much smaller prior to attaining the distance d
  • the slow-down or deceleration mechanism of the rod is actuated in a manner so as to act only in case of a short-circuit interruption, and in these cases it may from the beginning of the movement of the rod, limit the speed to a maximum desired value; it has to be simply controlled by a current measuring device within the phase considered which, above a certain current threshold,
  • such a device may be situated within the grounded control, at the base of the circuit breaker, and in that case is controlled by the intensity transformer associated with the considered phase.
  • the speed limitation is obtained With each operation, and intervenes between the distance d for which the interruption of the capacitive current is terminated with certainty and the distance d for which the interruption of short-circuit currents becomes possible; the speed limitation acts then also for the interruption of small inductive currents which is favorable, for a high speed might favor the current draw-out.
  • the present invention has as its further object the provision of means intended to realize the high opening speed which constitutes one of the basic concepts of the present invention.
  • the circuit breaker pole i.e., the pole members belonging to the same phase
  • the circuit breaker pole may be constituted in certain embodiments by placing in series interrupting chambers in which the speed of the rod is of the same order of magnitude as thespeeds realized in conventional circuit breakers, and it will then comprise a number of interrupting chambers which is clearly more considerable than that of the circuit breakers of analogous voltage with small oil-volume realized to date, and this is still another feature of the present invention.
  • FIGURE 5 illustrates a conventional arrangement of interrupting chambers connected in series, wherein 41, 42, 43 and 44 designate interrupting chambers similar to that of FIG. 3, the interrupting chamber being mounted on insulators 45 and 46 and actuated by hydraulic jacks 47 and 48.
  • the number of chambers in series is, in a modified embodiment of the present invention, of the same order as that encountered in certain conventional circuit breakers, and, the very considerable acceleration which then has to be imparted to the rod of each chamber to obtain, for the moment of separation of the contacts, the speed necessary for the interruption of capactive currents, is obtained by the release of the pneumatic control energy; the opening of the circuit breaker by pneumatic energy with a view to attain a very high speed in the separation of the contacts, and associated, within a circuit breaker of small oil volume, with the anti-cavitation device mentioned hereinabove, constitutes also a feature of the invention.
  • hydropneumatic opening control described in the French Patent No. 1,203,632, filed March 21, 1958, in the name of the assignee of the present application and in the three certificates of addition filed, respectively, on June 6, 1958, November 3, 1959, and February 19, 1960, for Method of Hydro-Pneumatic Control for Electrical Apparatus and Application to a Circuit Breaker.
  • the tubular member 2 secured to a piston 3 slides along the axis of a cylindrical member 4.
  • the piston 3 is displaced within the cylindrical member 4 in the lower part of which are arranged the fixed contacts 1 of any suitable construction of which only a single one is shown in the drawing,
  • a spring 5 normally urges the piston member 3 downwardly as viewed in FIGURE 1, and thereby forces the oil located within the space 6 to pass through the throttling apertures 7 of any suitable 1 cross section and inclined with respect to the axis of rod 2 so as to be divergent in the opening direction of rod 2.
  • the lower guide portion 8 re-directs the oil towards the contacts 1 and toward the orifice of the spark arrester cover 9; as shown in cross section in FIGURE 2, the spark arrestor cover comprises radial notches 10.
  • This arrangement enables a reduction in the play between the cylindrical bore 11 of the cover 9 and the movable rod 12 which, offers the advantage of avoiding the premature extinction of the are which is the cause of re-ignitions and sometimes re-strikings before the movable rod 12 has left the cover 9 and to permit to bring up to speed the anti-cavitation compensating device from the beginning of the movement of the disengagement of the movable contact, by assuring to the oil a sufiicient passage cross section by means of the notches 10.
  • the compensating device During closure of the circuit breaker, the compensating device is armed by the contact rod 12 which pushes the tubular member 2 and the piston 3 upwardly during that time and compresses thereby the spring 5 while penetrating into the fixed contact.
  • the time of operation of the anti-cavitation device is controlled by the diaphragm or throttling apertures 7 in such a manner that the dielectric strength of the interruption distance attains approximately 2 /2 times the peak value of the simple voltage, a half period after the movable rod leaves the spark arrester cover 9 by eliminating the restrikings in case of capacitive interruptions.
  • This forced flow of the oil ceases less than a half period later, and the interruption of inductive currents will take place, after this position, under the action of only the auto-blast, within the zone in which the dielectric strength of the interruption distance maintains substantially the value indicated hereinabove.
  • the movable contact may be braked very strongly and slowed down in order to reduce the energy released by the interruption of short-circuit currents, in the most unfavorable case, that is when a passage through zero accidentally arrives for an opening very slightly smaller than the minimum opening necessary for the interruption, which entrains the maintenance of the are for a supplementary half period.
  • FIGURE 3 shows, in particularg a braking device for the movable contact 12 which is operative by acting on the flow through an oil outlet or discharge line 20 connected to a cylinder containing the actuating piston 16 of which the piston rod is connected by the transmission linkage 15 to the movable contact rod 12 which is displaced Within the interrupting chamber 13 contained within the insulating envelope 14 of the circuit breaker.
  • the intensity of current traversing the circuit breaker which flows through the winding 17 and acts in opposition to the traction spring 19 normally seeking to bring back the magnetic core 18 to the left, displaces the latter toward the right, and the extremity 24 of the rod of piston 16, acting on the lever 25, tilts or rocks the lever 26 and displaces the check-value ball 27 by the intermediary of the movable valve stem and spool portion 28.
  • valve 22 The operation of the valve 22 is regulated by conventional means in such a manner as to avoid any appreciable oscillatory movements of the movable part.
  • the device according to the present invention renders unnecessary the employment of damping resistances for the voltage surges since the interrupters with forced autoblast cause, in the interruption of small inductive currents, only relatively small over-voltages or voltage surges.
  • the device utilized for the engagement permits to conserve a high speed of the movable contact during the existence of the are at the closure and to introduce only toward the end of the path a resisting force which facilitates damping of the movable rod.
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closing position thereof, and control means within said oil injection pot for controlling the opening movement of said movhigh speed to said movable contact means and injecting on said movable contact means an anti-cavitation oil current in the direction of movement of said movable contact means substantially free of swirling movements during substantially the entire duration of possible restriking with capacitive interruptions.
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closing position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including means for assisting in imparting at the beginning of the opening movement a very high speed to said movable contact means and means for injecting i011 said movable contact means an anti-cavitation oil current substantially in the direction of movement of said movable contact means during substantially the entire duration of possible restriking with capacitive interruptions, said control means being regulated in such a manner that the maximum efficacy of said anti-cavitation oil current commences less than a half-period after said movable contact means leaves said spark-arrested cover means and terminates at the maximum one period after said
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, actuating means for effecting opening of said circuit breaker, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closing position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armedduring closure movement of said movable contact means, and means including said energy storage means assisted by the force produced by said actuating means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means for injecting on said movable contact means an anti-cavitation oil current substantially in the direction of movement of said movable contact means during the entire duration of possible restriking wit-h capacitive interruptions.
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, actuating means for effecting opening of said circuit breaker, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closing position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means having disengaging spring means armed during closure movement of said movable contact means, and means including said energy storage means assisted by the force produced by said actuating means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means for injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening movement of said movable contact means during the entire duration of possibl restriking with capacitive interruptions.
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, actuating means including a hydropneumatic control system for effecting opening of said circuit breaker, housing means eflectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closing position thereof, and control means Within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, and means including said energy storage means assisted by the force produced by said hydro-pneumatic control system of the actuating means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means for injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening movement of said movable contact means during the entire duration of possible restriking with capacitive interruption
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, housing means eflectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means Within said oil injection pot for controlling the opening movement of said movable contact means including means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means and injecting on said movable contact means an anti-cavitation oil current in the direction of movement of said movable contact means substantially free of swirling movements during the entire duration of possible restriking with capacitive interruption, the interruption speed per pole structure being eflectively multiplied by means producing a plurality of interrupting points placed in series.
  • a high-voltage circuit breaker provided with cooperating stationary and movable contact means, comprising means for imparting to said movable contact means a relatively very high opening velocity including braking means for subjecting said movable contact means to a braking action within a zone corresponding to substantially optimum position thereof for interrupting short-circuit currents and small inductive currents, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening movement of said movable contact means and substantially during the entire duration of possible restriking with capacitive interruptions.
  • a high-voltage circuit breaker provided with cooperating stationary and movable contact means, comprising means for imparting to said movable contact means a relatively very high opening velocity including braking means for subjecting said movable contact means to a braking action within a zone corresponding to substantially optimum position thereof for interrupting short-circuit currents and small inductive currents, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening movement of said movable contact means and substantially during the entire duration of possible restriking with capacitive interruptions, said braking means including a fluid-controlled system having valve means and electromagnetic actuating means for actuating said valve means in response to the current flowing through said circuitbreaker exceeding a predetermined threshold value to thereby control the flow of fluid medium within said fluid system.
  • a high-voltage circuit breaker provided with cooperating stationary and movable contact means, comprising means for imparting to said movable contact means a relatively very high opening velocity including braking means for subjecting said movable contact means to a braking action within a zone corresponding to substantially optimum position thereof for interrupting short-circuit currents and small inductiv currents, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening move ment of said movable contact means and substantially during the entire duration of possible restriking with capacitive interruptions, said braking means including a fluid-controlled system having valve means and electromagnetic actuating means for actuating said valve means in response to the current flowing through said circuitbreaker exceeding a predetermined threshold value to thereby control the flow of fluid medium within said fluid system, said braking means being operative by evacuation of said fluid medium.
  • a high-voltage circuit breaker provided, within a housing, with cooperating stationary and movable contact means, comprising means for imparting to said movable contact means a relatively very high opening velocity including braking means for subjecting said movable contact means to a braking action within a zone corresponding to substantially optimum position thereof for interrupting short-circuit currents and small inductive currents, and means within said housing injecting on said movable contact means an anti-cavitation oil current in the direction of opening movement of said movable contact means and substantially during only the entire duration of possible restriking with capacitive interruptions, said braking means including a fluid-controlled system having valve means and electromagnetic actuating means for actuating said valve means in response to the current flowing through said circuit breaker exceeding a predetermined threshold value to thereby control the flow of fluid medium within said fluid system, said braking means being operative by admission of said fluid medium.
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imlpartin-g at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anticavitation oil current substantially in the direction of opening movement of said movable contact means and during the entire duration of possible restrikin with capacitive interruptions including partition Wall means forming throttling aperture means for the oil and effectively interposed between said energy storage means and said spark arrester cover means.
  • a high-voltage, small-oi l-vo lume circuit breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means and including a contact rod, housing means efiectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means Within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means and having cylinder means slida-bly accommodating therein piston means having a piston rod pushed back by said contact rod during closing movement thereof to compress spring means,
  • means including said energy storage means for assisting in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means including said piston means for injecting on said movable contact means an anti-cavitation oil current substantially in the direction of opening movement of said movable contact means and substantially only during the entire duration of possible restriking with capacitive interruptions.
  • a high-voltage, small-oil-vo lume cirouitabreaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact including a contact rod, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for control-ling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of movement of said movable contact means during the entire duration of possible restriking with capacitive interruptions including partition wall means forming throttling aperture means for the oil and effectively interposed between said energy storage means and said spark arrester cover means, said spark-arrester
  • a high-voltage, small-oi l-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means including a contact rod, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means Within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said mo'vab le cont-act means, and means injecting on said movable cont-act means an anti-cavitation oil current substantially in the direction of movement of said movable contact means during the entire duration of possible restrikin-g with capacitive interruptions including partition wall means forming throttling aperture means for the oil and effectively interposed between said energy storage means and said spark-arrester cover means
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means including a contact rod, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of movement of said movable contact means during the entire duration of possible restriking with capacitive interruptions including partition wall means formin throttling aperture means for the oil having a divergent direction in the opening sense of said movable contact means and effectively interposed between said energy storage means and said
  • a high-voltage, sm all-oil-volume circuit-breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means and including a contact rod, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means and having cylinder means slidably accommodating therein piston means having a piston rod pushed back by said contact rod during closing movement thereof to compress spring means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, brake means for subjecting said movable contact means to a braking action in the opening movement thereof in a position of said movable contact means corresponding substantially to optimum position for interrupting shortcircuit currents and small inductive currents, and means including said piston means
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means and including a contact rod, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means and having cylinder means slidably accommodating therein piston means having a piston rod pushed back by said contact rod during closing movement thereof to compress spring means, means including said energy storage means for assisting in imparting at the beginning of the opening movement a very high speed to said movable contact means, brake means for subjecting said movable contact means to a braking action in the opening movement thereof in a position of said movable contact means corresponding substantially to optimum position for interrupting short-circuit currents and small inductive currents, and means including said piston means for inject
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark arrester cover means, said movable contact means and said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anticavitation oil current approximately in the direction of displacement of said movable contact means and substantially during the entire duration of possible res-triking with capacitive interruptions including cylinder means for the oil, piston means in said cylinder means having a piston rod with a base, throttling means for the oil effectively formed between said energy storage means and said sparkarrester cover means, said throttling means
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and said stationary contact means being disposed onthe inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anti-cavitation oil current approximately in the direction of displacement of said movable contact means and substantially during the entire duration of possible restriking with capacitive interruptions including partition wall means intermediate said energy storage means and said sparkarrester cover means forming a perforated diaphragm for the oil, said partition wall means being axially extended in the direction of closing movement of said movable contact means
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for assisting in imparting at the beginning of the opening movement a very high speed to said movable contact means, hydraulically actuated means for subjecting said movable contact means to braking action in the opening movement thereof in a position of said movable contact means corresponding substantially to optimum position for interrupting short-circuit currents and small inductive currents, and means injecting on said movable contact means an anti-cavitation oil current approximately in the direction of displacement of said movable contact means and substantially during the entire duration of possible restriking with capac
  • a high-voltage, small-oil-volume circuit-breaker comprising stationary contact means having fixed contact fingers, movable contact means cooperating with said stationary contact means, housing means effectively forming an oil injection pot and including spark-arrester cover means, said movable contact means and the fixed contact fingers of said stationary contact means being disposed on the inside of said oil injection pot in the closure position thereof, said oil injection pot having a reduced diameter in lthe portion thereof directly adjoining said spark-arrester cover means and said fixed contact fingers being disposed in said last-mentioned portion, and control means within said oil injection pot for controlling the opening movement of said movable contact means including energy storage means armed during closure movement of said movable contact means, means including said energy storage means for aiding in imparting at the beginning of the opening movement a very high speed to said movable contact means, and means injecting on said movable contact means an anti-cavitation oil current substantially in the direction of displacement of said movable contact means during the entire duration of possible restriking with capacitive interruptions including th

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US117363A 1960-06-21 1961-06-15 Anti-restriking oil circuit breaker having an anti-cavitation device Expired - Lifetime US3300610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR830668A FR1268547A (fr) 1960-06-21 1960-06-21 Disjoncteur à huile sans réamorçage

Publications (1)

Publication Number Publication Date
US3300610A true US3300610A (en) 1967-01-24

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US330610D Pending USB330610I5 (de) 1960-06-21
US117363A Expired - Lifetime US3300610A (en) 1960-06-21 1961-06-15 Anti-restriking oil circuit breaker having an anti-cavitation device

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Application Number Title Priority Date Filing Date
US330610D Pending USB330610I5 (de) 1960-06-21

Country Status (6)

Country Link
US (2) US3300610A (de)
AT (1) AT243357B (de)
CH (1) CH376981A (de)
DE (1) DE1264571B (de)
ES (1) ES267172A1 (de)
FR (1) FR1268547A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364328A (en) * 1964-08-07 1968-01-16 Oerlikon Maschf Fluid pressure actuated electric power circuit breaker
US3592989A (en) * 1967-12-27 1971-07-13 Asea Ab High voltage circuit breaker with pressurized breaking chamber of low liquid type
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20150053647A1 (en) * 2012-05-31 2015-02-26 Mitsubishi Electric Corporation Gas circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378661A (en) * 1965-10-20 1968-04-16 Allis Chalmers Mfg Co Auxiliary contact structure with arc suppressing means

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Publication number Priority date Publication date Assignee Title
DE653377C (de) * 1934-07-30 1937-11-23 Siemens Schuckertwerke Akt Ges Schalter
GB514704A (en) * 1938-05-13 1939-11-15 Gen Electric Co Ltd Improvements in or relating to electric liquid-break circuit breakers
US2459599A (en) * 1944-09-20 1949-01-18 Westinghouse Electric Corp Circuit interrupter
FR1214863A (fr) * 1958-06-19 1960-04-12 Comp Generale Electricite Perfectionnements aux disjoncteurs à huile

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* Cited by examiner, † Cited by third party
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DE574855C (de) * 1933-04-20 Neumann Hochspannungs App G M Fluessigkeitsschalter
DE407681C (de) * 1923-07-03 1925-01-02 Emag Elek Citaets A G Durchfuehrungsoelschalter
DE705359C (de) * 1934-11-01 1941-04-25 Studiengesellschaft Fuer Hochl Loeschkammerschalter
DE741832C (de) * 1935-04-27 1943-11-17 Licht Und Kraft Ag Loeschkammerschalter
DE664899C (de) * 1935-10-04 1938-09-13 Studiengesellschaft Fuer Hochl Leistungsschalter mit insbesondere einer ueber die Kontaktstelle hinwegfuehrenden, durch die Lichtbogenwaerme hervorgerufenen Fluessigkeitsstroemung
DE906236C (de) * 1943-08-10 1954-03-11 Voigt & Haeffner Ag Hochspannungsschalter
DE826027C (de) * 1948-10-02 1951-12-27 Voigt & Haeffner Ag Elektrischer Schalter
DE956321C (de) * 1954-09-25 1957-01-17 Siemens Ag Last- und Leistungstrenner mit Lichtbogenloeschern, insbesondere aus gasabgebenden Stoffen
DE1037550B (de) * 1957-07-26 1958-08-28 Asea Ab Loeschkammer fuer elektrische OElschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE653377C (de) * 1934-07-30 1937-11-23 Siemens Schuckertwerke Akt Ges Schalter
GB514704A (en) * 1938-05-13 1939-11-15 Gen Electric Co Ltd Improvements in or relating to electric liquid-break circuit breakers
US2459599A (en) * 1944-09-20 1949-01-18 Westinghouse Electric Corp Circuit interrupter
FR1214863A (fr) * 1958-06-19 1960-04-12 Comp Generale Electricite Perfectionnements aux disjoncteurs à huile

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364328A (en) * 1964-08-07 1968-01-16 Oerlikon Maschf Fluid pressure actuated electric power circuit breaker
US3592989A (en) * 1967-12-27 1971-07-13 Asea Ab High voltage circuit breaker with pressurized breaking chamber of low liquid type
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US7777149B2 (en) 2006-09-29 2010-08-17 Areva T&D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US7642480B2 (en) * 2006-10-09 2010-01-05 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20150053647A1 (en) * 2012-05-31 2015-02-26 Mitsubishi Electric Corporation Gas circuit breaker
US9349556B2 (en) * 2012-05-31 2016-05-24 Mitsubishi Electric Corporation Gas circuit breaker

Also Published As

Publication number Publication date
DE1264571B (de) 1968-03-28
ES267172A1 (es) 1961-08-01
AT243357B (de) 1965-11-10
USB330610I5 (de)
FR1268547A (fr) 1961-08-04
CH376981A (fr) 1964-04-30

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