US2134593A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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US2134593A
US2134593A US712344A US71234434A US2134593A US 2134593 A US2134593 A US 2134593A US 712344 A US712344 A US 712344A US 71234434 A US71234434 A US 71234434A US 2134593 A US2134593 A US 2134593A
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circuit
cause
trip
open
trip device
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US712344A
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Wulsten Kurt
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CBS Corp
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Westinghouse Electric and Manufacturing Co
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/48—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release
    • H01H73/56—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by push-button, pull-knob or slide

Definitions

  • My invention relates .particularly to circuit breakers of the type used for controlling lighting aliid moderate power distribution or network circ ts.
  • Circuit breakers for this type of service present a rather complex ⁇ problem tothe electrical art. Ordinarily, they are used in homes or factories and must, therefore, be positive in operation and absolutely safe.
  • the breakers are quick-make and.V quick-break to prevent circuit disturbances or prolonged arcing;
  • the trip devices used with the breakers must be reliable and accurate in operation and must cause the opening of the controlled circuit irrespective of the position of theoperating member; and in addition the operating mechanism and the trip device should be entirely resettable after each opening of the circuit as a result ofthe operation of the trip device by movement of the operating member.
  • a commercially successful breaker must be ylow in cost, due to the large number used in even a moderately sized building or factory, and due to the fact that the devices compete directly with the older fuse and separate switch combination.
  • the principal object of my invention is, therefore, the provision of an improved circuit breaker of the above described type that shall satisfactorily meet all present day operational requirements, and that shall at the same time be low in cost.
  • This object of my invention is accomplished through the provision of an improved operating mechanism for actuating the circuit breaker contacts and through the provision of an improved trip device which coperates with the mechanism to secure the desired operation of the circuit breaker.
  • the operating mechanism of my invention 4 utilizes a pair of toggle links and a manually movable operating member for moving the contacts to the open and to the closed-circuit position.
  • the line of action of the tog- .gie is nearly straight when the breaker is open -and is substantially bent when the breaker is closed.
  • This arrangement necessitates the application of a ⁇ large force to the operating member in order to initiate movement of the contacts ⁇ toward the closed-circuit position.
  • the component of force which causes the movement of the contact members toward the closed circuit position progressively increases (due to the bending of1-the toggle) as the closing operation progresses, the contacts are eiectively closed at high speed without the use of an overcenter spring.
  • a second toggle linkage which in the preferred form comprises a pair of pivotally joined link meml5 bers.
  • This supporting linkage is disposed intermediate the operating linkage and the trip device and is adapted to be substantially straight when the breaker is in the closed circuit position in order to minimize the forces which must be bal- 20 anced by the trip device.
  • I provide a single trip bar which is actuable by any one of a plurality of electroresponsive tripping elements. 25
  • I provide one or more electromagnetic tripping elements and one thermally responsive tripping element, each of which is en' ⁇ 30 ergized in response to the current flowing through one of the poles of the breaker.
  • Each of the tripping elements is individually capable of causing the operation of the trip device on the occurrence of predetermined overload conditions 35 which are diierent from the predetermined overload conditions which cause the operation of the other devices. It is thus possible to secure protection over any range of requirements which might be encountered inordinary service.
  • A11 of the 40 several tripping elements directly engage, or are lin part supported upon, the single trip bar, and by virtue of this arangement a substantial reduction in the cost of the apparatus is eected.
  • Fig. 2 is a front elevational view of the circuit breaker shown in Figure 1. The cover has been removed in 'order to more clearly illustrate the structure features involved. Y
  • Fig. 3 is a fragmentary view showing the operating mechanism and one of the pairs of separable contacts in the normal open-circuit position
  • Fig. 4 is a view similar to Fig. 3 showing the operating mechanism and the contacts in the closed-circuit position
  • Fig 5 is a view similar to Figs. 3 and 4 showing operating mechanism and contacts in the tripped position
  • Fig. 6 is a fragmentary view partially in section showing the features of one of the electromagnetic Jtripping elements
  • Fig. 'i is a fragmentary perspective view showing the features of the trip bar and certain of the tripping elements
  • Fig. 8 is a schematic view showing the connections of the circuit breaker and the tripping elements
  • Fig. 9 is a schematic view showing the electrical connections of the circuit breaker and the controlled apparatus arranged for protection against ground faults
  • Fig. 10 is aview of the circuit breaker taken along the line X-X of Fig. i,
  • Fig. l1 is a. sectional view on the line XI-XI of Fig. l,
  • Fig. l2 is a fragmentary view, partially in section, showing the features of the combined blowout and trip coiis, and
  • Fig. 13 is a fragmentary view, partially in section, on the line XIII-XIII of Fig. l2.
  • the circuit breaker shown in the drawings comprises generally a base i of molded insulating material upon which are mounted a pair of terminal contacts 3 and 5 for connection with the line side of the supply circuit, a pair of stationarycontact members 1, a pair of movable contact members S for cooperating therewith to open and close the circuit, a toggle link operating mechanism Il for moving the breaker to the open and the closed circuit position, a pair of blow-out coils I3 for moving the arc established incident to the opening of the controlled circuit into suitable arc chutes I5, a trip device I1 which includes a plurality of magnetically responsive tripping elements and a plurality of thermally responsive tripping elements, and a second pair of terminals I9 and 2i for connecting the breaker to the load side of the circuit.
  • a suitable cover 23, also of molded insulating material, is provided for enclosing the moving parts of the breaker.
  • the stationary contacts 1 are each formed from a suitably bent strip of conducting material which is rigidly supported on the base I by means such as a screw fastening or the like.
  • The' movable contact members 9 are each supported upon the base I through .the agency of a resilient support member 25. One end of each of these support members 25 is electrically and mechanically connected to the associated contact member 9 by means of a screw 21, to permit easy replacement of the moving contact members, and the other end is supported upon the base I and is at the same time connected to the terminal 28 of girlie of the blow-out coils I3 by a screw fastening
  • Each of the blow-out coils I3 is Wound in the usual manner about a core member 33 which is shown particularly in Figs. l2 and 13.
  • Each of these core members 33 is provided with two pairs of pole pieces 35 and 31.
  • the upper pair of pole .coils I3 is connected by means of a bolt 4I to the terminal 43 of one of the energizing coils 45 for the magnetically responsive tripping device shown particularly in Figure 6.
  • the other terminal 41 of each of the energizing coils 45 is connected by suitable means to the terminal 49 of one of the bimetallic thermally responsive tripping elements 5I, shown particularly in Fig. 1.
  • is connected to one of the load terminals of the breaker by means ofa strip of conducting material 55 and suitable screw fastenings 51.
  • each of the poles is thus seen to be comparatively direct. Beginning with the line terminal 5, the current flows progressively through the stationary contact 1, the moving contact 9, the supporting strip 25 therefor, the blow-out coil I3 and thence the energizing coil 45 for the electromagnetic tripping element, and the U-shaped bimetallic member 5I, to the line terminal ZI.
  • the operating mechanism II for moving the contacts 9 to the open and to the closed-circuitposition is entirely supported upon a U-shaped frame member 59 which is rigidly aiiixed to the base I. It includes an operating member 6I having aV knob 63 of insulating material which is adapted to cooperate with a suitable guide opening 65 in one portion of the mechanism frame, and a guide pin 61 which cooperates with a second suitably proportioned opening 69 for defining the path of movement of the operating member.
  • Both of the moving contact members 9 are biased to the open circuit position at all times by virtue of the resiliency of their support members 25, and in order to actuate the breaker contacts, a pivotally supported insulating member 1I is provided.
  • This member has three projections 13, and 11 formed integrally therewith. 'Iwo of these (13 and 15) serve to engage the flexible supports 25 for the moving contacts 9 to permit normal operation of the breaker, and the third (11) serves as one of the links of the toggle operating mechanism.
  • the other link of the toggle operating linkage comprises a fiat link member 19 pivotally joined at one end to the projection 11 and pivotally joined at the other end to the upper link 8
  • the operating member 6I engages the Operating toggle linkage through a slot 83 which is adapted to slidably engage the pivot pin 85 which joins theoperating and support linkages.
  • the toggle support linkage comprises the upper link 8
  • the apex of this bell crank lever 81 is pivotally joined to the upper toggle link 8
  • the end 93 of the other side portion of the bell crank link ⁇ 81 is ,the other end is provided with a member
  • a spring 91 is provided for biasing the operating member 6
  • This spring 91 v also Lserves the function of automatically restoring the several parts of the breaker and the trip device to an operative position following an opening of the breaker resulting from the operation of the trip device.
  • the force exerted by the spring 91 is incapable of opening the breaker under normal operating conditions.
  • 1 comprises, as mentioned above, a single, pivotally supported trip bar 50, having a latch member 95 at one end thereof for cooperating with the support toggle linkage to permit manual operation of the breaker, and a plurality of tripping elements for causing the breaker to open automatically upon the occurrence of predetermined conditions in the controlled circuit.
  • a U-shaped saddle member 99 is supported upon the central portion of the trip bar 50 and is rigidly aflixed thereto, as is shown in Fig. 7.
  • Ailixed to the base portion of thisv saddle are a pair of rigid metal strips 0
  • the armatures 52 are positioned, in the assembled breaker, adjacent the pole pieces 31 which are energized by 'the combination blow-out and trip coils I3, and are each individually biased out of engagement with those pole pieces 31 by means of suitable coil springs
  • the trip device includes a second electromagneticallyresponsive tripping means which includes a separate electromagnetically responsive tripping element for each of the two poles of the breaker.
  • This second tripping means is shown particularly in Fig. .6 and is normally energized by either of the coils 45, each of which is connected in series withl the circuit controlled by one'of the pairs of separablecontacts. Either of the two coils 45 is capable of attracting an armature
  • the tripping coils 45 are supported -upon a portion of the frame 59 utilized for supporting the operating mechanism, and are each adapted to energize a suitable core member
  • 01 is formed from a tubular means of magnetic material and is open at the lower end.
  • This tube is provided with a slot
  • 1 is provided for controlling the distance separating the armature
  • the trip bar 50 is provided with" an L-shaped arm
  • of this arm is adapted to engage the projection
  • each of the thermally responsive tripping elements 5
  • the trip device is 5 provided with three electro-responsive tripping elements for each of the two poles of the breaker.
  • All of the magnetically responsive tripping elements are individually operable to cause the opening of l5 the Abreaker immediately following the occurrence of predetermined conditions.
  • is operable to cause the actuation of the trip device only after a time delay which is in- 20 versely proportional to vthe current iiowing therethrough.
  • the supl port linkage moves from the bent position shown in Fig. 3 to a substantially straight position as shown in Fig. 4.
  • 'I'he support linkage is 50 thus able to balance the large reaction force which may be transmittedY through the operating mechanism by a very small force.
  • This arrangement reduces to minimum the force which must be supplied by the tripping device I1 and thereby 55 permits the securing of a maximum 'of sensitivity in that device.
  • the support linkage is always in the overcenter position, thereby assuring that therelease of the end 93 of the bell crank lever 81 by the G0 trip device
  • the contacts may be opened manually by pulling the operating member 6
  • This method of operation is not desirable, however, because of the fact that it has a tendency to cause delayed opening of the contacts.
  • I provide a slidable member
  • 21 engages a suitable guide opening
  • 21 has suitable means for engaging the trip bar D to cause it to rotate to the tripped position.
  • the opening of the circuit effects the removal of the overload condition from the breaker, and the trip bar Eil is ⁇ then free to move under the action oi the biasing springs 03 to the-untripped position, in which position the end 93 of the bell crank lever t1 reengages the latching member 95 so as to permit the supporting linkage to hold the operating linkage in the closed circuit position.
  • circuit breaker shall open the circuit immediately upon the occurrence of a breakdown of the insulation within the controlled equipments
  • breaker of my invention it is very simple to include protection against this condition merely through the provision of an extra tripping coil and a simple switching equipment.
  • the electrical connections for a circuit of this type are shown in Fig. 9 wherein the numerals 3, 5, 19 and 21 represent *the terminals of the breaker, and the numerals 1 and 9 represent the separable contacts. Essentially, this device comprises nothing more than an extra coil
  • 35 is directly connected to the breaker terminal
  • 49 is provided with a lateral lug
  • 51 of a carbonaceous or like material is positioned within a suitable guide clamp
  • 65 which is slidably supported on the frame 59 is provided for actuating the switching lever
  • 39 or' the special tripping .device is normally connected to the ungrounded frame of a piece of 'electrical equipment as indicated at M.
  • the operating mechanism of my improved breaker is capable of opening and closing the circuits at high speed without requiring the use of an over-center operating spring, and the trip device is capable of causing the opening of the breaker irrespective of theposition of the operating member.
  • the improved operation of the device results, at least in part, from the novel form and arrangement of the operating and support linkages, and the arrangement of these linkages is believed to be an important feature of my invention.
  • the trip device which, in conjunction with the improved operating mechanism disclosed, accom-
  • Another novel feature of my invention is the provision of means for causing the opening of the breaker upon a ,failureof theinsulation in an ungrounded piece of electrical equipment and the combination with that means of means for testing the operation thereof.
  • a 4circuit interrupter separable contact means for opening and for closing the circuit, actuating means for moving'said contact members to the open and to the closed circuit position, and a trip device operable upon the occurrence of predetermined conditions to cause said actuating means to automatically move said contact means to the open circuit position
  • said actuating means including a toggle linkage for operatively engaging said contact means, and a second toggle linkage intermediate said first toggle linkage and said trip device for supporting said first toggle linkage, ⁇ said first toggle linkage being substantially straight when said interrupter is in the open circuit position and being bent at the knee thereof when said interrupter is in the closed circuit position to facilitate rapid opening of the controlled circuit, said second toggle linkage being substantially straight when said interrupter is in the closed-circuit position.
  • actuating means for opening and for closing the circuit
  • actuating means including an operating member for moving said contact members ⁇ to the open and to the closed-circuit position, and a trip device operable upon the occurrence of predetermined conditions to cause said actuating means to automatically move said contact means to the opencircuit position
  • said actuating means including a toggle linkage intermediate said operating member and said contact means, and a support for said toggle linkage which comprises a second toggle linkage, one end of which operatively engages said trip device, said first toggle linkage being substantially straight when said interrupter is in the open-circuit position and being bent at the knee thereof when Isaid interrupter is in the closedcircuit position to facilitate rapid opening of the controlled circuit upon the actuation of said trip device, said second toggle linkage being substantially straight when said interrupterlis in the closed-circuit position in order 'to minimize the tripping force which must be supplied by said trip device, said second toggle linkage collapsing upon the actuation of said trip device and y
  • actuating means for opening and for closing the circuit
  • actuating means including an operating member for moving said contact members to the open and to the closed-circuit position, and a trip device operable upon the occurrence of predetermined conditions to cause said actuating means to automatically move said contact means to the opencircuit position
  • said actuating means including a toggle linkage intermediate said operating member and said contact means, and a'support for said toggle linkage which comprises va second toggle linkage one end of which operatively engages said trip device, said first toggle linkage being substantially straight when said interrupter is in the vopen-circuit position and being bent at the knee thereof when said interrupter is in the closed-circuit position to facilitate rapid opening of the controlled circuit upon the actuation of said trip device, said second toggle linkage being substantially straight when said interrupter is in the closed-circuit position in order to minimize the tripping force which must be supplied by said trip device,'said second toggle linkage collapsing upon the actuation of said trip device and thereby becoming incapable of
  • actuating means including an operating member for moving said contact lmembers to the open and to the closed-circuit position, and a trip device operable upon the occurrence of predetermined conditions to cause said actuating means to automatically move said contact means to the opencircuit position
  • said:4 actuating means including two pairs of toggle links, one of the said two pairs of toggle links being substantially straight when said interrupter is in the open-circuit position to facilitate rapid closing of the contact means during the circuit-closing operation, the other of the vsaidtwo pairs of toggle links serving as a support for .the first pair of toggle links in order to permit normal operation of said interrupter in response strained in a position where it supports said first pair of toggle links in an operative position by means associated with said trip device.
  • actuating means for opening and for closing the circuit
  • actuating means including an operating member for moving said contact members to the open and to the closed-circuit position, and a trip device operable upon the occurrence of predetermined conditions to cause said actuating means to automatically move said contact means to the opencircuit position, ⁇ irrespective of the position of said operating member
  • said actuating means including two pairs of toggle links, one of the said two pairs of toggle links being substantially straight when said interrupter is in the opencircuit position to facilitate rapid closing of the contact means during thel circuit-closing operation, the other of the said two pairs of toggle links serving as a support for the yiirst pair of toggle links in order to permit normal operation of said interrupter in response to movement of said operating member, said second pair of toggle links being normally restrained in a position where it supports said first pair of toggle links in an operative position by means associated with said trip device.
  • actuating means including an operating member for moving said contact members to the open and to the closed-circuit position, means biasing said contact means to the open-circuit position when said interrupter is in the closed-circuit position, and a trip device operable upon the occurrence of a predetermined condition to cause said contact means to be moved to the open-circuit position by said biasing means, said actuatingmeans including a pair of toggle links disposed intermediate said operating member and said contact means, said pair of toggle links being substantially straight when said interrupter is in the open-circuit position to facilitate rapid closing of said contact means during the circuit-closing operation, and support means for said pair of toggle links comprising a second pair of toggle links, said first pair of toggle links being bent at the knee when said interrupter is in the closedcircuit position and 'said second pair of toggle links being substantially straight when said interrupter is in the closed-circuit position.
  • actuating means for moving said contact means to the open and to the closed-circuit position including a toggle linkage and an operating member, and an electro-responsive support means for normally holding said toggle linkage in an operative position, said support means becoming incapable of holding said toggle linkage in the closed-circuit position upon the occurrence o! predetermined conditions and thereby causing said actuating means to move said contact means to the open-circuit position, said toggle linkage being operatively connected to said operating member through a slot and pin connection with the slot extending generally perpendicularly to the direction of movement of the operating mem- ⁇ ber.
  • actuating means for moving said contact means to the open and to the closed-circuit position including a toggle linkage and a manually operable handle having a slot extending generally perpendicularly to its direction of movement, and an electro-responsive support means for normally holding said toggle linkage in an operative position, said support means becoming incapable of holding said toggle linkage in the closed-circuit position upon the occurrence oi' predetermined conditions and thereby causing said actuating means to move said contact means to the open-circuit position, said toggle linkage being operatively connected to said operating handle through a pin in said slot in order that the operation of said electro-responsivesupportmeans shall cause said actuating means to move said contact meansto the open-circuit position irrespective of the position of said operating handle.
  • a pair of separable contact means for opening and for closing the circuit, actuating means for moving said contact means to the open and to the closed-circuit position, and a trip device operable to cause said actuating means to automatically move said contact means from the closed-circuit to the opencircuit position;
  • said trip device including a single trip bar movable to cause the operation of said device, and two separate electromagnetic means, each individually responsive to dverent predetermined electrical conditions in the circuit controlled bysaid interrupter, for moving said trip bar and thereby effecting the operation of said trip device, one of said electromagnetic means including a movable armature entirely supported upon said trip bar, the other of said electromagnetic means including means movable to engage said trip bar to cause the operation of said trip device.
  • a pair of separable contact means for opening and for closing the circultf actuating means for moving said contact means to the open and to the closed-circuit position
  • a trip device operable to cause said actuating means to automatically move said contact means from the closed circuit to the open circuit position
  • said trip device including a single trip bar movable to cause the operation of said device, an armature entirely supported upon said trip bar, means responsive to the circuit controlled by said pair oi' separable contacts for attracting said armature upon the occurrence of predetermined conditions and thereby causing the operation of said trip device, and a second means likewise responsive to the circuit controlled by said pair of separable contacts for moving said trip bar to cause the operation of said trip device upon the occurrence of other predetermined conditions.
  • a pair of seperable contact means for opening and for closing the circuit actuating means for moving said contact means to the open and to the closed-circuit position
  • a trip device operable to cause said actuating means to automatically move said contact means from the closed-circuit to the open circuit position
  • said trip device including a single trip bar movable to cause the operation of said device, an armature entirely supported upon said trip bar, means for attracting said armature upon the occurrence of predetermined conditions in the circuit controlled by said interrupter to cause the operation of said trip device, and means for causing the operation of said trip device upon the occurrence of other predetermined conditions in the circuit controlled in vsaid interrupter
  • said means including a means of bimetallic material having a portion thereof that is movable to cause movement o! said trip bar.
  • a pair of separable contact means for opening and for closing the circuit, actuating means for moving said contact means to the open and to the closed-circuit position, and a trip device operable to cause said actuating means to automatically move said contact means from the closed-circuit to the opencircuit position
  • said trip device including a single, pivotally mounted trip bar that is movable to cause the operation of said trip device, an armature entirely supported upon said trip bar, means l for attracting said armature upon the occurrence of predetermined conditions in the circuit controlled by said pair of separable contacts, to cause the actuation of said trip device, and means for causing the operation of said trip devices upon the occurrence o!
  • said means including a curcontact means for opening and for closing the varmature upon the occurrence of predetermined conditions in the circuit controlled by said pair of separable contacts to cause the actuation of said trip device, and means for causing the operation of said trip device upon the occurrence of other predetermined conditions in the circuit controlled by said pair of separable contacts, said means comprising a substantially U-shaped current carrying member of -bimetallic material having a portion projecting outwardly from the closed end of said U, said portion being movable and being adapted to directly engage said-trip bar to cause the operation of said trip device.
  • a trip device for a circuit interrupter a single trip bar movableto cause the actuation of said device, an armature entirely supported upon said trip bar, means for attracting said armature upon the occurrence of predetermined electrical conditions tocause the actuation of said device, and an electro-responsive means including means operable upon the occurrence of other predetermined electrical conditions to cause said trip bar to be moved to a position where it effects the actuation of said trip device.
  • a multi-pole circuit interrupter a plurality of pairs of separable contact means'for defining a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles, and a trip device operable to cause said actuating means to automatically move a plurality of said contact means to the open circuit position
  • said trip device including a single trip bar extending across a plurality of the poles of said interrupter, a plurality of armatures entirely supported upon said trip bar, a plurality of means, each of which is energized in response to the circuit controlled by one of said pairs vof contacts, for attracting each of said armatures individually to cause the actuation of said trip device upon the occurrence of predetermined electrical conditions, and means responsive to dverent predetermined conditions for moving said single trip bar to cause the actuation o! said trip device.
  • a multi-pole circuit interrupter In a multi-pole circuit interrupter, a plurality of pairs of separable contact means for deilning a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles,
  • said tripdevice including a single trip bar extending across a plurality of the poles of said interrupter, a plurality of armatures entirely supported upon said trip bar, a plurality of means, each of which is energized in response to the circuit controlled by one of said pairs of contacts, for attracting each of said armatures individually to cause the actuation of -said trip device upon the ocpurrence of predetermined electrical conditions, and a plurality of thermally responsive tripping elements each energized in response to the circuit controlled by one of said pairs of contacts, ⁇ each of said thermally responsive trippingtelements vincluding means movable upon the occurrence of predetermined conditions in the controlled circuit to directly engage said trip bar and thereby effect the actuation of said trip device.
  • a multi-pole circuit interrupter a plurality of pairs of separable contact means for defining a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles, and a trip device operable to cause said actuating means to automatically move a plurality of said contact means to the open circuit position,
  • said trip device including a single trip bar movable tocause the actuation of said device, a plurality oi?4 armatures entirely supported upon said trip bar, a plurality of means, each of which is energized in response to the circuit controlled by one of said pairs of contacts, for attracting each of said armatures individually to cause the actuation of said trip device upon the occurrence ci predetermined conditions, and means operable in response to different predetermined conditions to cause said trip bar to Vbe moved toa position where it effects the actuation of said device.
  • a multi-pole circuit interrupter a plurality of pairs of separable contact means for defining a plurality of poles, actuating means ior Y moving said contact means to open and to. close the circuits controlled by said plurality of poles, and a trip device operable to cause said actuating means to automatically move a plurality of said contact means to the open circuit position
  • said trip device including a single, pivotally supported, trip bar which extends across a plurality of the poles of said interrupter and which is movable from anormal inoperative lposition to an operative position to effect the actuation of'said trip device, a plurality of armatures supported on said trip bar at spaced intervals, a plurality of means, each of which is energizedin response to the circuit controlled by one of said pairs of contacts, for attracting each oi said armatures individually to cause the actuation of said trip device upon the occurrence of predetermined electrical con,- ditions, and means operable in response to diierent predetermined electrical
  • a circuit interrupter comprising a pair of separable contact members, actuatingmeans for normally movingsaid members to the open and to the closed-circuit position, and a trip device operable to cause said actuating means to automatically move said contact members from the closed circuit to theopen-circuit position
  • said trip device including' a trip member movable upon the occurrence of an overload from a normal inoperative position to an operative position to effect the actuation ofsaid device
  • the combination of means adapted to detect break-down of insulation in the circuit controlled by the interrupter comprising an electro-responsive device operable to cause said trip member to bemoved from said inoperativcto saidoperative position, and a switching device movable from a normal open circuit position to a closed circuit position to effect the energization of said electro-responsive device.
  • a circuit interrupter comprising a pair of separable contact members, actuating means for normally moving said members to the open and to the closed circuit position, and a trip device operable to cause said actuating means to automatically move said contact members from the alsV closed circuit to the open-circuit position
  • said trip device including a trip bar movable upon the occurrence of an overload from a normal inoperative position to an operative position to effect the actuation of said device
  • the combination of means adapted to detect break-down of insulation in the circuit controlled by the interrupter comprising an armature movable to cause said trip bar to be moved from said inoperative to said operative position, a coil means for attracting said armature, .and a test switch movable from a normal open circuit position to a closed circuit position to eiect the energization of said coil means.
  • a multi-pole circuit interrupter in a multi-pole circuit interrupter, a plurality of. pairs of separable contacts for defining a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles, and a.
  • trip device operable to cause said actuating means to move a plurality of said pairs of separable contacts to the open circuit position
  • said trip device including a trip bar movable from a normal inoperative to an operative position to eiect the actuation of said device, electro-responsive means operable when energized to cause said trip bar to be moved from said inoperative to said operative position, switching means movable successively from a normal open circuit position to a plurality of 'closed circuit positions to effect the energization of said electro-responsive means, said switching means being operable when moved to said closed circuit positions to connect said coil means successively into the circuit controlled by each of a plurality of the poles of said interrupter.
  • a multi-pole circuit interrupter a plurality of pairs of separable contacts for dening a plurality of poles, actuating means for moving said contact means to open and .to close the circuits controlled by said plurality of poles, and a trip device operable to cause said actuating means to move a plurality of said pairs of separable contacts to the open circuit position, said trip device including a trip bar movable from a normal inoperative to an operative position to eiect the actuation of said-device, 'current-carrying, electro-responsive means operable lto cause said trip bar to be moved from said inoperative to said operative position, and a test switch movable successively from a normal open circuit position to a plurality of separate closed circuit positions, the circuit controlled by each of a plurality of the poles of said interruptor being grounded through said current-carrying, electro-responsive means when said test switch is moved to said closed circuit positions.
  • a multi-pole circuit interrupter 'a plurality of p airs of separable contacts for deilning a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles, and a trip device operable to 'cause said actuating means to move a plurality of said pairs of separa'ole contacts to the open circuit position, said trip device including a trip bar movable from a normal inoperative position to an operative position to effect the actuation of said device, an armature movable to cause said trip bar to be moved from said inoperative to said operative position, a coil means for attracting said armature, a test 'switch movable successively from a normal open circuit position to a plurality of separate 'closed circuit positions, the circuit controlled by each of a plurality of the poles of said interrupter being grounded through said enersizing coil when said switch is moved to said closed circuit positions, and means tor limiting the current
  • a pair oi separable contact means for opening and for closing the circuit, actuating means for moving said contact means to the open and to the closed circuit position, a trip device operable to cause said actuating means to automatically move said contact means from the closed circuit to the open circuit position, and a closure means which substantially completely encloses said trip device and the other structural elements of said interrupter, said trip device including a.
  • trip member movable from a normal inoperative to an operative position to eil'ect the actuation of said device, electro-responsive means operable when energized to cause said trip member to be moved from said inoperative to said operative position, switching means movable from a normal open circuit position to a closed circuit position to eiect the energization of -said electro-responsive means, and means whereby said switching means may be operated from without said closure.
  • said trip device including a single trip bar movable from a normal inoperative to an operative position to effect the actuation of said device, an amature movable to cause said trip bar tobe moved from said inoperative to said operative position, a'plurality of coil means, each of which is individually capable of attracting said armature to effect the operation of said device, means for energizing each of a plurality of said coil members in accordance with the current conditions in the circuit controlled by one of said plurality of poles, and switching means movable successively from a normal open circuit position to a plurality of closed circuit positions to effect the ener
  • a pair of separable contact means for opening and for closing the circuit
  • ⁇ a'ctuating means for moving said contact means to the open and to the closed-circuit position
  • a trip device operable to cause said trigger of said actuating means to automatically move said contact means from the closed 'circuit to the open circuit position
  • said trip device including a single trip bar having a latch portion normally holding said trigger and movable to cause the release thereof, an armature entirely supported upon said trip bar, means responsive to the circuit controlled by said pair of separable contacts for attracting said armature upon the occurrence ot predetermined 'conditions and thereby causing the operation of said trip device, and a. thermally responsive means likewise responsive to the circuit controlled by said pair o1' separable contacts for moving said trip bar to cause the operation of said trip device upon the occurrence of other predetermined conditions.
  • a tripA device for a circuit interruptorl having a trigger biased to move and cause opening of the circuit, a single trip bar having a latch portion thereon 'for holding said trigger and movable to cause the release of said trigger, an amature entirely supported upon said trip bar, means'for attracting said armature upon the occurrence of predetermined electrical conditions to cause the actuation of said device, and thermally responsive means operable upon the occur,A
  • separable contact means for opening and for closing the circuit
  • actuating means for moving said contact means to the open and to the .closed-circuit position
  • electro-responsive means normally limiting relative movement between said pin and slot so that movement of said operating member causes said link to move the contact means
  • said electroresponsive means being operable to permit move ment between said pin and slot so that said contact means may move to open the circuit Without a corresponding movement of the operating member.
  • separable contact means for opening and for closing the circuit
  • actuating means for moving said contact means to the open and to the closed-circuit position
  • an operating member mounted for reciprocating movement and an actuated member 'connected to the operating member through a guide surface extending generally transversely of the direction of the reciprocating movement of the operating member
  • electro-responsive means normally limiting relative movement between said operating member and said actuated member so that movement of said operating member in one direction causes said actuating member to move the contact means to close the circuit
  • said electro-responsive means being operable upon the occurrence of a predetermined condition to permit said actuating member to slide along said guide surface and cause movement of said contact means to open the circuit without movement of said operating member, and means for causing movement of said operating member in the opposite direction after movement of said contact means to open the circuit in response to operation of said electro-responsive means.
  • separable contact means for opening and for closing the circuit
  • actuating means for moving said contact means to the open and to the closed-circuit position
  • holding means normally- 'rection causes said actuated member to move the contact means to close the circuit
  • electro-re- -sponsivemeans for releasing said holding means to permit said actuated memberto slide along said guide surface and cause movement of said contact means to open the circuit without requiring movement of said operating member
  • separable contact means for opening and for closing the circuit
  • actuating means for moving said contact means to the open and to the closed-circuit position
  • an operating member mounted for reciprocating movement and an actuated member connected to Athe operating member through a guide surface 'extending generally transversely of the direction of the reciprocating movement of thel operating member
  • holding means normaily limiting relative movement between said operating member and said actuated member so that movement of said operating member in one direction causes said actuated member to move the contact means toV close the circuit
  • electroresponsive means -for releasing said holding means to permit said actuated member to slide along said guide surface and cause movement of said contact means to open the circuit without requiring movement of -said operating member
  • a manually operable member for releasing said holding means independently of said electro-responsive means, and means for thereafter causing movement of said operating member to open' circuit position and for automatically resetting said hoiding means so that said contact means may be reclosed by movement of the iirst said operating member.
  • actuating means for moving said contact means to open and to close the circuits controlled by said plurality of poles and including a trigger biased to move and cause said contact means to move to open-circuit position, and a trip device operable to cause said trigger of said actuating means to automatically move a plurality of said contact means to the open circuit position,said trip device including a.
  • trip bar having a latch portion normally holding said trigger and movable to cause the release thereof, a plurality of armatures entirely supported upon said trip bar, a plurality of means, each of which is energized in response to the circuit controlled-by one of said pairs of contacts, for attracting each oi said armatures individually to cause the actuation of said trip device and the release of said trigger upon the occurrence of predetermined conditions, and means operable in response to different predetermined conditions to cause said trip bar to. be moved to a position where it eiiects theactuation of said device and the release of said trigger.
  • a multi-pole circuit interrupter a plurality of pairs of separable contact means for deiining a plurality of poles, 'actuating' means for. moving said contact means to open and to close the circuits controlled by said plurality of poles and including a trigger biased to move and cause said contact means to move to open-circuit position, a trip device operable to cause said trigger of said actuating means to automatically move a plurality of said contact means to the open circuit. ⁇ position, said trip device including a single trip bar having a latch portion normally holding said trigger andk movable to cause the release thereof, said actuating means including a handle member normally movable for opening and closing all of said contact means, a plurality oi" armatures entirely supported upon said trip bar, a plurality'ofmeans, eachof which is energized in response to the circuit controlled by one of said pairs of contacts, for attracting each of said armatures individually to cause the actuation oi said trip device and the release of said trigger upon the occurrence
  • a multi-pole circuit inten-opter a plurality of pairs of separable contact meanstor defining a plurality of poles, actuating means for moving said contact means to open and to close the circuits controlled -by said plurality of poles and including a trigger biased to move and cause said contact means to move to open-circuit position, a trip device operable to cause said trigger of said actuating means to automatically move a plurality of said contact means to the open circuit position, said trip device including a single trip bar having a latch portion normally holding said trigger and movable to cause the release thereof, said actuating means including a handle member normally movable for opening and closing all of said contact means without causing release oi' said trigger by said latch portion, a plurality of armatures entirely ⁇ supported upon said trip bar, a plurality of means., each of which is energized in response to the circuit controlled by one of said pairs of contacts, for attracting each of said armatures individually rto cause the actuation of said trip device and the release
  • said trigger upon the occurrence of predetermined conditions, means operable in response to different predetermined conditions to causesaid trip bar y to be moved to a position'where it eiiects the actuation of said device and therelease o! said trigger, said release oi said trigger causing opening ot said contact means by saidiactuating means irrespective of the position in which said handle member may be held, and said handle member being operable to return said trigger into engagement with said latch portion after opening of said contact'means.

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US712344A 1933-02-25 1934-02-21 Circuit breaker Expired - Lifetime US2134593A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448470A (en) * 1941-09-25 1948-08-31 Metropolitan Device Corp Latch-trip type circuit breaker
US2520708A (en) * 1943-02-22 1950-08-29 Master Electric Co Electromagnetic circuit controller
US2612575A (en) * 1947-06-13 1952-09-30 Francis Ondrejca Resetting fuse plug
US2773150A (en) * 1953-02-26 1956-12-04 Crabtree & Co Ltd J A Electric switches and circuit breakers
US2844681A (en) * 1954-06-10 1958-07-22 Busch Jaeger Duerener Metall Automatic electric cut-outs
US2958751A (en) * 1958-04-08 1960-11-01 Heinemann Electric Co Handle and latching mechanism for circuit breakers
US3032624A (en) * 1958-07-31 1962-05-01 Square D Co Control mechanism
US3145281A (en) * 1961-01-23 1964-08-18 Mechanical Products Inc Multipole circuit breaker with trip devices located in the housing of a single pole
US3541481A (en) * 1967-08-23 1970-11-17 Siemens Ag Automatic electric switch
EP2200065A1 (fr) * 2008-12-22 2010-06-23 Hager-Electro SAS Dispositif de déclenchement magnétique pour appareil de protection de ligne à au moins deux pôles protégés

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448470A (en) * 1941-09-25 1948-08-31 Metropolitan Device Corp Latch-trip type circuit breaker
US2520708A (en) * 1943-02-22 1950-08-29 Master Electric Co Electromagnetic circuit controller
US2612575A (en) * 1947-06-13 1952-09-30 Francis Ondrejca Resetting fuse plug
US2773150A (en) * 1953-02-26 1956-12-04 Crabtree & Co Ltd J A Electric switches and circuit breakers
US2844681A (en) * 1954-06-10 1958-07-22 Busch Jaeger Duerener Metall Automatic electric cut-outs
US2958751A (en) * 1958-04-08 1960-11-01 Heinemann Electric Co Handle and latching mechanism for circuit breakers
US3032624A (en) * 1958-07-31 1962-05-01 Square D Co Control mechanism
US3145281A (en) * 1961-01-23 1964-08-18 Mechanical Products Inc Multipole circuit breaker with trip devices located in the housing of a single pole
US3541481A (en) * 1967-08-23 1970-11-17 Siemens Ag Automatic electric switch
EP2200065A1 (fr) * 2008-12-22 2010-06-23 Hager-Electro SAS Dispositif de déclenchement magnétique pour appareil de protection de ligne à au moins deux pôles protégés
FR2940510A1 (fr) * 2008-12-22 2010-06-25 Hager Electro Sas Dispositif de declenchement magnetique pour appareil de protection de ligne a au moins deux poles proteges

Also Published As

Publication number Publication date
BE400720A (fr)
FR753211A (fr) 1933-10-11

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