US2331221A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2331221A
US2331221A US391628A US39162841A US2331221A US 2331221 A US2331221 A US 2331221A US 391628 A US391628 A US 391628A US 39162841 A US39162841 A US 39162841A US 2331221 A US2331221 A US 2331221A
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US
United States
Prior art keywords
circuit
blade
interrupting
movement
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US391628A
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English (en)
Inventor
Ortensi Ennio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Electric Corp
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Westinghouse Electric Corp
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Filing date
Publication date
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Application granted granted Critical
Publication of US2331221A publication Critical patent/US2331221A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches

Definitions

  • This invention relates generally to electric circuit-interrupting devices, and more particularly to interrupting devices capable of interrupting load currents and at the same time insert a relatively large visible air gap in the circuit.
  • Switches of this type have been devised, but they either have incorporated the arc-extinguishing means in the switch by modifying the switch to provide a relatively complex and expensive structure, or when arc-extinguishing means have been used separated from the switch structure the switch per se has required substantial modification from standard types of switches, and relatively extensive and complex control means have been required.
  • one object of this invention is to f provide a disconnecting switch capable of interrupting load currents and utilizing a standard type of switch construction.
  • Another object of this invention is to provide an attachment for standard types of disconnectis capable of interrupting load currents, and which may be employed with standard types of switches without any substantial modication thereof.
  • Another object of this a novel type of disconnecting switch which is also capable of interrupting load currents.
  • Another object of this invention is to provide a novel type of circuit interrupter having disconinvention is to provide necting and current-interrupting contacts, ⁇ with novel means for actuating said contacts in a predetermined sequence.
  • Figure 1 is aside elevational view, partly in section, illustrating a preferred embodiment of the invention, with the interrupter shown in a closed circuit position; e
  • Fig. 2 is a view similar to Fig. 1, but showing the interrupter in a partlyfopen position;
  • Fig. 3 is an enlargedfront view, partly in section, of the interrupter shown in Figs. 1 and 2.
  • the interrupter shown on the drawings is supported on a pair of channel members 2 and 4, re spectively, and these members are, in turn, maintained in spaced relation on an angle iron 6 or the like, which may be welded or otherwise se-r cured to channel members 2 and 4.
  • An insulator 8 which may be of porcelain or the like, has a stud II extending from the base thereof through an aperture in channel 2 to be 'secured thereto, as by the nut l2.
  • a like insulator I0 is provided with a stud II projecting'from its base through channel member 4 to be secured thereto by a nut I2.
  • the insulator 8 is provided with a supporting extension I4 fixed thereto, and to which is secured a break contact xture I6.
  • the fixture I6 comprises a base portion I8 secured to the supporting extension I4, for example, as by screws I5, and rigid g pair of break contact jaws 24 for receiving one end of a switch blade. therebetween.
  • the jaws 24 are preferably of some resilient conducting material, such as, for example, copper or a copper alloy.
  • the base I 8 of the break contact iixture I 6 is also provided with an integral extension 20 forming a terminal lug to which a conductor may be secured, for example, as by ⁇ the machine screw 22..
  • f l Insulator I0 is adapted to support at its outer end a supporting casingr 26 for a current-interrupting means.
  • the casing 2B is preferably of some conducting material, and may be of a cast i construction including opposite side walls l28, a rear wall 30 secured to the outer end of insulator III by any desired means, such, for example, as by bolts or the like.
  • the casing 26 is also provided with an open iront wall adapted to be substantially closed by a cover plate 32 secured to the casing by stud bolts 35 and nuts 34.
  • the cover plate 32 is provided with a slot 83 for a purpose to be hereinafter referred to.
  • the bottom wall of casing 25 is provided with a substantially circular opening 38, at the outer side of which there is a shoulder 40, formed by the outwardly extending interiorly to cooperate with the exteriorly threaded end of an insulating, tube 42, having an enlarged bore 50 of substantially the same diameter as opening 36 in the bottom wall of casing 26.
  • Insulating tube 42 may be of any desired insulating material, preferably an insulating material. such as nbre, which is capable of evolving an arc-extinguishing gas when in proximity to an electric arc.
  • the enlarged bore 50 of in With base portion I8 are a threaded portion 38, adapted sulating tube 42 terminates short of the lower end of the tube in a reduced bore 44, forming bethe lower end of insulating tube 42 and is ex- 10 Y teriorly threaded as at 56u
  • the lower end of insulatingtube 42 is provided with an end cap 58, and conducting rod 64 is secured in positionwithin insulating tube 42 by a washer 62 and nut'80, which ⁇ are adapted to withdraw the shoulder on the rod into firm engagement with shoulder 48 in the insulating tube 42.
  • a second nut 64 is providedy on threaded portion 56 of conductor rod 54 so that a conductor may be secured in conducting relation to rod 54.
  • the enlarged portion 52 of conductor rod 04 is spaced from the inner walls of enlarged bore 50 of' insulating tube 42, and that this portion 52 of the conductor rod extends entirely through the bore and into supporting casing 26.
  • the top wall i8 of supporting casing 28 is also provided with a substantially circular aperture, j
  • the tube 82 like tube 42. is preferably of an insulating material which is capable of evolving an arc-extinguishing casing when in proximity to an electric arc.
  • the movably mounted tube 82 is adapted to have anoperating means secured to the upper end thereof, and the front and rear spaces 8
  • the circuit may be readily reclosed by merely moving tube 82 upwardly to the position shown in Figs. l and 3, whereupon springs 16 will move conductor arms 66 back into engagement with conductor rod 54.
  • insulating tube 82 The upper end of insulating tube 82 is provided with a plug member 84 secured in the tube provided with an integral extension 86 having an operating pin 88 extending transversely thereof.
  • a substantially U-shaped operating member has the arms 82 thereof disposed on opposite sides of Jinsulating tube 82, and these arms 92 are each provided with an elongated slot 90 for receiving operating pin 88.
  • 'I'he arms 92 of the actuating ⁇ 2.,. bracket are connected by a base portion 93 secured in any desired manner to the' outer end of a pivotally mounted insulating member 94, which may be of the same material as insulating supports 8 and i0.
  • the pivoted insulator 94 has the inner end thereof secured to an actuating shaft 86 in any desired manner, and this shaft is, in turn, lrotatably mounted on angle supporting member, 6, and is adapted to be actuated by a crank arm 88 keyed or otherwise se'cured for movement with actuating shaft 86.
  • 00 is also mounted, as shown, on angle support 6 in any desired manner, such, for
  • this bracket rotatably supports a shaft
  • 02 is a crank arm H0, the-outer end of which carries a fixed pivot pin H2, adapted to be received in an elongated slot il@ formed in the outer end of an actuating rod H6 which extends to a remote point for operation to control the 0 interrupting means mounted on supports 2, 4
  • actuating rod M8 may be fixed to a bracket H8, for example, as by bolts i8, with the bracket I8 being pivotally mounted as at
  • 22 is adapted to be pivotally mounted adjacent pivot
  • 22 may beprovided with a handle portion
  • 82 is pivotally connected to one toggle link
  • 00 where it is provided with a pair of springs supporting washers
  • the supporting casing 26 on insulator I0 is also provided with forwardly extending supporting lugs
  • the disconnecting switch blade 46 is provided at its lower end with resilient contact strips
  • 46 is also provided with contact plate portions
  • 46 Adjacent, but spaced above, the pivot mounting
  • 60 extends laterally of the blade so as to be engaged in slots provided in the arms ⁇ 62 ci the actuating bracket mounted on pivoted insulator 94.
  • the slot provided comprises an inner portion disposed Portion opening to As shown in in these arms
  • each arm bracket arms 92 are connected by a cross-bar
  • the interrupter may be.connected in circuit by having one conductor connected to"the lower portion 56 oi conductor rod 64, and the circuit through the device may be traced from conductor rod 54, through contactarms 66, supporting casing 26, switch blade
  • the sequence of operation of the disconnecting switch blade and current-interrupting contacts is. just the reverse of the circuit-interthe blade, for example, as by rivet 5
  • 41 provide a means of obtaining a good rupting operation. That is, when the pivoted insulator is moved from the dotted line position shown in Fig.
  • Applicant's current-interrupting means issubstantially enclosed in casing 2B, which is provided withthe vent slot 83 in cover plate 32 for laterally venting the gases generated by the arc in insulat, ing tube 42, away from the live parts of the circuit. It should alsobe noted that applicantv has provided a pair of circuit-interrupting means, one
  • a disconnecting switch including a blade member mounted for movement into and out of engagement with a cooperating contact, current interrupting means adjacent said switch and including separable contacts connected in series circuit relation with said switch, actuating means including a pivoted lever having a direct ⁇ connection with said separable so as to be engaged therebyin a'circuit interrupting operation to move s'aid blade member away from saidcooperating contact only after said lever has moved a predetermined amount'to open said separable current interrupting contacts.
  • a disconnecting switch including a blade member mounted for movement into and out of'engagement with a cooperating contact, current interrupting means adjacent said switch and ⁇ including separable contacts connected in series circuit relation with said switch, actuating means including a pivoted lever having a direct connection with said separable current interrupting conta ts, means fixed on said blade member and positi ned at a point in the path of movement of a portion of said lever so as to be engaged thereby in a circuit inter.
  • saidlever having a cam portion, and cam folff rlower means on said blade member positioned at a point in the path of movement oi' said cam portion but spaced therefrom in the closed circuit position, so that said cam follower means is engaged by said cam portion only after said lever in its circuit opening movement has opened said separable contacts.
  • a-disconnecting switch including a blade member mounted for movement into and out of engagement with a cooperating contact, current interrupting means adjacent said switch and including separable contacts connected in series circuit relation with said switch, a pivoted actuating lever for opening and ,closing said separable contacts and directly con- -nected with atleast one of said separable contacts, said lever having an open-ended cam slot, cam follower means on said blade member positioned at a point in the path of movement of said cam portion but spaced therefrom in the closed circuit position, whereby in a circuit interrupting operation said blade member will be opened by said lever only after said leverin its circuit opening movement has opened said separable contacts.
  • Circuit interruptingmeans including separable contacts, operating means including a pivoted operating lever for opening and closing said contacts, resilient means biasing said lever for movement in a direction to open said contacts, latch means normally preventing movement of said lever under the influence of said biasing means, and a control member having a lost motion connection with said operating means and operative upon movement in one direction to removement into and out Y 1 9,831,221 1 f lease said latch ineens and operative upon movein a direction to close said contacts and reset said l' ment in a direction to open said contacts, toggle means ovabl'e to an overcenter latching position for normally under the influence of said biasing means, and' a control member having a st motion connection with 'said toggle means, A upon movement in opposite directions to move said toggle means Jovercenter to said latching position and to a released position wherein said biasing means 'is' eii'ective to rapidly open 'said contacts.
  • circuit interrupting means a pair of spaced insulating supports, contact means carried by one of said supports, current interrupting means and a switch blade mounted on the other of said supports, said switch blade mounted for of engagement with said contact means independent of said current in terrupting means,.said current interrupting means sociated with said including separable contacts connected in serial arrangement with said blade, operating means ascurrent inter 'pting means and operable in one direction to open said separable contacts, and said operating means being related tosaid blade in a manner such that it is operable to move said blade away from said contact means only upon continued movement of said operating means in the same direction after sep-i aration of said contacts.
  • a Acircuit interrupter a base, a pair of spaced insulating supports mounted on said base, contact means carried by one of said supports, current- ⁇ interrupting means and a switch blade mounted on the other of said supports, said switch blade mounted for movement into and out of engagement withtsaid contact means independent of said current interrupting means, said current interrupting means including separable contacts connected in serial arrangement with said blade, operating means associated'with said current interrupting means and movably mounted on said base so as to be operable in one direction to open said separable contacts. and said operating means being related to said blade in a manner such that it is operable to move said blade away from said contact means only upon continued movement of said operatingmeans in the same direction after separation of said contacts.
  • Incircuit interrupting means a pair of spaced insulating supports, contact means carried by one of said supports, current interrupting means mounted .on the other of said supports, a switch blade mounted on said current interrupting means for movement into and out of engagement with said contact means, said current interrupting means including. separable contacts connected in serial arrangement withsaid blade, operating means associated with said current interrupting means and operable in one direction to open said separable contacts, and said operating' means being related to said blade in a manner such that it is operableto moye said blade away from said contact'means only upon f continued movement oi' said operating means in the same direction after separation of said contacts.
  • a disconnecting switch including blade preventing movement of said -lever engagement with said cooperating contact, biasing said operating means for movement in a direction to open said switch, and releasable latch means for normally preventing movement of said operating means under the influence of said bias ingV means.
  • circuit interrupting means separable disconnecting contacts and current 'interrupting contacts arranged in series circuit relation
  • operating means for said contacts including a movably mounted actuatingmember having a direct connection to at least one oil said interrupting contacts and a lost motion connection with at least one of said disconnecting contacts, whereby said memberis movable circuit interrupting operation to first open said engageable with 13.
  • a discon-v necting switch including a blade member mounted for movement into ,and out of engagement with a cooperating contact, currentJ interrupting means adJacent said switch and including separable contacts connected in series circuit relation with said switch, operating means for said switch and interrupting means including a member movable in one direction in a circuit interrupting operation to rst separate said current interrupting contacts and to thereafter move said blade member away from said cooperating'conl tact, said member being movable in an opposite direction in a circuit closing operation to first move said blade member into engagement with .said cooperating contact and to thereafter close said current interrupting contacts, "means biasing said member in said one direction,I latch means for normallyT preventing movement of lsaid member, and means for releasing said latch means to permit said biasing means to rapidly open said interrupting means and switch in succession, said last 4mentioned means being operable to reset said in one direction in a' member in latched position following a circuit interrupting operation.
  • said current interrupting means lo including ⁇ separable contacts in series circuit with said blade, means of insulating material movable in a path extendingj between said supports and in a direction away from said contact means sup- .port to move between said ⁇ separable contacts to open the circuit therethrough, and operatingmeans operable in a circuit opening operation UDO! mOV actuate said insulating 'means to open said separable current interrupting contacts while said 2,
  • blade member remains stationary, and to theres after move said blade vmember away from said cooperating contact.
  • circuit interrupting means a pair oi spaced insulating supports, vcontact means carried by one of said supports, current interrupting means and a switch blade mounted on the other of said supports, said switch blade mounted for movement into and out of ergagement with said contact means independent of said current interrupting means, said current interrupting means including separable contacts in series circuit with said blade, means of insulating material movable in a path extending between said supports and in a direction away from said contact means support to'move between said contacts to open, the circuit therethrough and elongate the arc, other ⁇ means of insulating material forming with said movable insulating means a restricted arc passage having at least inner wall portions 40 of an insulating material which is capable of evolving an arc extinguishing gas when in proximity to an electric-arc, said arc passage extending in the direction of the path of movement of said movable insulating means, a yvent for said passage so that gases will be discharged therefrom at an angle to said
  • circuit interrupting means spaced insulating supports, contact means carried by one of said supports, current interrupting means and a switch blade mounted on the other of said supports, said switch blade mounted for movement into andl out of engagement with said contact means, said current interrupting means including an enclosure mounted on said other support and extending ,therefrom in a direction away from. said one support, separable contacts in said enclosure connected in serial arrangement Awith said switch blade, operating means assooiated with said current interrupting means and operable in one direction to open said separable contacts, and said operatingmeans being related to said blade in a manner such that it is operable to move said iblade away from said contact means only upon continued movement of said operating means in the same direction.
  • circuit interrupting means a pair of spaced insulating supports, contact means cargg' ement thereof. in 'one direction to ilrst tion with said switch, operating means for said a pair of 65 vried by one of said supports, current interrupting and movable into said enclosure to separate said separable contacts therein, and operating means operable in-a circuit opening operation upon movement thereof in one direction to ilrst actuate said insulating means to open said separable current interrupting contacts while said blade member remains stationary. and to thereafter move said blade member away from said cooperating contact.3
  • a disconnecting switch including ablade member mounted for movement into and out of engagement with a cooperating contact, current interrupting means adjacent said switch and including separable contacts connected in series circuit relaswitch and interrupting means,l said operating means including an actuating member directly connected with at least one of said separable contacts, spaced stop portions on said blade member between which said actuating member is movable, means for locking said actuating member in closed circuit position in engagement with one of said stop portions to prevent movement of said blade member out of engagement with saidsy cooperating contact, said actuating member biased to move in a direction to open the circuit, whereby upon release of said locking means said actuating member, moves between said stop portions 'to separate said separable contacts and thereafter engages the other of said stop portions to move said blade member out oi.' engagement with said cooperating contact.
  • circuit interrupting means a pair of spaced insulating supports, contact means scar- Y ried by one of said supports, current interrupting vmeans and a switch blade mounted on the other of said supports, said current interrupting means including separable contacts, said switch blade mounted for movement into and out of engagement with said contact means, and a tiltably mounted insulator having a direct connection with said separable contacts and a lost motion connection with said blade.
  • circuit interrupting means including a blade member mounted for movement into and out of engagement with a cooperating contact, operating means for said switch, said operating means including an actuating member, spaced stop portions on said blade member between which said actuating member is movable, means for locking said actuating member in closed circuit position in engagement with one of said stopportions to prevent movement of said blade member out of engagement with said cooperating contact, said actuating member biased to move in a direction to open the circuit, whereby upon release of said locking means saidactu'ating member moves between said stop portions to engage the other of said stop portions with ⁇ an impact and move said blade out of engagement with said cooperating contact.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US391628A 1940-05-25 1941-05-03 Circuit interrupter Expired - Lifetime US2331221A (en)

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IT2331221X 1940-05-25

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FR (1) FR974432A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428597A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2460818A (en) * 1944-04-27 1949-02-08 Monitor Controller Co Electric switch
US2678361A (en) * 1951-03-29 1954-05-11 Mitchell Frank Electrical interrupter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE527965A (fr) * 1953-04-09

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428597A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2460818A (en) * 1944-04-27 1949-02-08 Monitor Controller Co Electric switch
US2678361A (en) * 1951-03-29 1954-05-11 Mitchell Frank Electrical interrupter

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Publication number Publication date
FR974432A (fr) 1951-02-22

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