US2331632A - Switchgear - Google Patents

Switchgear Download PDF

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Publication number
US2331632A
US2331632A US319889A US31988940A US2331632A US 2331632 A US2331632 A US 2331632A US 319889 A US319889 A US 319889A US 31988940 A US31988940 A US 31988940A US 2331632 A US2331632 A US 2331632A
Authority
US
United States
Prior art keywords
switch
blade
contact
spaced
frame
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
US319889A
Other languages
English (en)
Inventor
Gordon F Sauers
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US319889A priority Critical patent/US2331632A/en
Priority to DES4694D priority patent/DE940126C/de
Application granted granted Critical
Publication of US2331632A publication Critical patent/US2331632A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch
    • H01H31/16—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member

Definitions

  • My invention relates, generally, to electric circuit interrupting devices, and more specifically to disconnecting switches.
  • the force necessary to move the blade due to the friction at the hinge contact is of a high value, and at the initial opening and final closing movements of the blade it is also necessary to overcome the friction at the break contacts.
  • the force required to operate the switch may be' high enough to prohibit direct manual operation.
  • One object of.my invention is to provide a disconnecting switch utilizing highment of the switch blade, so that but a negligible force isl required to move the blade during the major portion of its opening and .closingmovements.
  • a further 'object of my' invention is to provide a disconnecting switch having a novel movable
  • a further object of my invention is to provide pressure contacts,v all of which are-entire1y disengaged and engaged by a relatively slight movemounted in metal cells or compartments, space 4considerations are important, and although the ordinary type of, disconnect switch may be mounted in a cell with a'. breaker, suchswitches embodying a blade pivoted on one contact and having high-pressure contacting portions, re-- quire considerable'space for their operation, and may require additional force multiplying mech- Accordingly, it is another tion to provide a novel type of disconnect switch so constructed as to require but a relatively small space for mounting ⁇ and operation.
  • a further object of my invention is to provide a novel form ⁇ of disconnect switch which is particularly constructed and adapted Ifor mounting in a cellwith a circuit breaker.
  • Another' :bject of -myinvention is to provide a disconnect Vswitch with novel locking means for locking the switch in an open or closed position.
  • Figure 1 is a side view of a disconnecting switch construction illustrating one embodiment ofmy invention
  • Fig. 2 Yis a transverse cross-sectional view through the switch construction shown in Fig. 1 and taken substantially on the linev II-II thereof;
  • Fig. 3 is a front end view of the switch handle removed, and showing a modi- 'iled locking means for the switch; y
  • Fig. 4 is a top view or the switch construction shown in Figs'. 1 and 2;
  • Fig. 5 is a diagrammatic view illustrating an electrical interlock between my novel switch and a circuit breaker
  • Fig. 6 is also a diagrammatic view illustrating object of my inven- Y the switch sham).-vr Vin Fig. l1 takenjust inside the front panel, with ⁇ wall 8 of the metallic cell or housing as by the.
  • Suitable tapped spacers I I are interposed between the housing wall 8 and the frame wall 6 and secured to the wall to threadedly receive the bolts I and to space the switch frame .from the housing wall.
  • An angle bar I2 is secured between the free ends of the frame sides 2 and 4 in any suitable manner such, for exbeing received between one arm 50 of each pair of supporting arms on the supporting bracket 4l and the spacing member -52 of the bracket, to thereby support the blade sides in proper spaced relation.
  • Securing pins 58 are passed through apertures in each pairof supporting arms 50 and through the blade to secure the blade to the bracket 48, and the pins 58 are secured in posiample, as by welding or the like.
  • the connecting portion 6 ofthe frame supports the spaced insu lators I'4 which are, in turn, suitably secured at substantially the mid-portion of this frame member, as by the screws I6.
  • the opposite ends of the insulators I4 carry contact tongues I8 secured to the insulator caps in any suitable manner, such as by the machine Screws 20.
  • Each contact tongue I8 has a contact portion projecting forwardly beyond the insulator I4, and a laterally extending terminal portion 22 for the connection of a'circuit conductor thereto.
  • the other contacts of the switches illustrated in the drawings are formed by spaced bus bars 24 supported from the angle bars I2 of the frame by spaced insulators 26, seated on top of the bars.
  • Each insulator 26 has secured to the top end thereof an angular bracket 28 to which is secured a bus bar 24.
  • the brackets 28 are secured to their respective insulators 26 and bus bars 24, as by the bolts 30.
  • Each bearing 32 includes the bearing halves 34 and 36 adapted to be -bolted together and to the angle bar I2 by the bolts 38.
  • a switch actuating shaft 40 is square in cross-section throughout its length except for spaced rounded journal portions adapted to be received in the bearings 32.
  • the shaft 40 is supported by the bearings 32 and is prevented from endwse movement by the squared portions of the shaft which extend radially beyond the rounded journal portion thereof to engage opposite sides of bearings 32.
  • Blade supporting insulators 42 are directly secured to the shaft 40 in spaced relation at points substantially opposite the respective contacts I8 and bus bars 24.
  • the insulators 42 are secured to the shaft as by bolts 44 passing directly through the shaft to be threadedly engaged in the end caps of the insulators 42.
  • each insulator 42 is secured to the shaft 40 by means of two bolts 44, and the vertical side of the supporting angle bracket I2 is provided with apertures 46 which, in the closed position vof the switch, are positioned to be in alignment with the bolts 44 so as to render them readily accessible and visible.
  • Each of the blade supporting insulators 42 has a blade supportingbracket 48 secured to the free end cap thereof, and each bracket includes spaced pairs of spaced arms 50 for receiving therebetween the split blade member 56. Between the arms of each pair of arms 58 is provided a spacing member 52 spaced from the arms and of a lesser extent than the arm.
  • the blade 56 is of the split type, and. includes the spaced blade sides 54 with each side tion in any desired manner, such,'for example, as by the use of cotter pins, as shown.
  • I have provided boltspassing through the blade sides for securing them together with an interposed spacer sleeve 62 on the .bolts 60 between the blade sides to maintain them securely in proper spaced relation.
  • the bolts 60 likewise support spring washers B4 at the outer sides of the blade to provide for prede'- termined contact pressure.
  • the contacting' portions of each blade are provided with raised, limited-area contact portions, as seen particularly in Figs. 2 and 4, which are in the form of longitudinally extending relatively sharp edged ridges.
  • This type of limited area contact portion is the same as that disclosed in the copending application of Herbert J. Crabbs, Serial No. 268,906, filed lApril 20, 1939, now Patent No. 2,262,168, issued November 11, 1941, and assigned to the same assignee as this application.
  • the ridges of the limited contact portions 66 extend longitudinally of the blade sincethe opening and closing movements of the blade are generally in a direction substantially parallel with the longitudinal axis of the blade.
  • operating shaft 40 is provided adjacent its forward end with a stop pin 68 suitably secured in an aperture in the shaft and projecting radially outwardly from the shaft, for cooperation with spaced fixed stop .pins 12 securedin the side 2 of the U-shaped switch supporting frame.
  • the stop lugs 12, asappears from Fig. 3, are spaced apart so ⁇ as to define the limits of rotary motion of the operating shaft 40 for the switch.
  • the vertical side of the supporting angle bar I2 is provided with an aperture 10, which in the closed position example, as by welding or the like.
  • a coil compression spring 86 isf provided over the actuating shaft 40 between the' side 2 of the switch support- 'ing frame, and the locking collar 8,8, to thereby normally urge the .collar 88 to. the'left, or outwardly of the switch structure as viewed in Fig. 1.
  • the outer end 'of the actuating shaft 40 terminates adjacent to-an enlarged aperture in the front wall 98 of the cell or housing in which the switch is mounted, and
  • an operating handle having a squared socket portion for receiving the squared end of the shaft may be provided on the outer end of the shaft for manipulation from the front of the panel.
  • the coil compression spring 86 will normally urge the locking col1ar
  • bracket member 14 At the forward end of the Ushaped supporting frame and secured to the side l2 of the frame is a bracket member 14 having offset flanges 18 .on two adjacent sides thereof which are secured to the frame side 2 as 'by the bolts 18, to space the bracket 14 from the frame side 2.
  • the bracket 14 includes an aperture aligned with the actuating shaft 40 in its vertical wall, 'and in its horizontal wall, as viewed in Fig. 1, there is provided a small aperture aligned With the opening in a sleeve 82 secured to, and depending from this wall of the bracket for the reception of a plunger locking member hereinafter to be further described.
  • Slidably but non-rotatably mounted on the actuating shaft 40 as by the provision ofa squared aperture therethrough correspondthe bracket 14 in any suitable manner, such for 86 and thereby, by way of the tie rods 90, the.
  • control means for the plunger lock 84 is shown schematically in Fig. 5, and partially in Fig. 3.
  • the disconnecting switch construction illustrated is particularly adapted for mounting in a cell or cubicle-l for housing a circuit breaker, and is adapted to connect the circuit breaker to its supply circuit, the object being ⁇ to enable disconnection of all partsof the circuit breaker from its source of supply to enable removal or repair of the vbreakl er. Since the disconnecting switch construction illustrated is not adapted to the opening of load currents, it isvnecessary to provide some sort of interlock between the breaker and disconnecting switch to prevent opening or closing of the switch unless the breaker is open. This may be accomplished by an electricalinterlock as shown in Figs.
  • the movable circuit breaker bridging member is provided with an auxiliary bridging contact
  • This independently energized control-circuit includes asolenoid
  • the lever H2 is pivoted as at I I4 on the side 2 of the switch supporting frame, and is maintained normally in the position shown in Fig. 5 by a coil tension spring H8 secured to the end of lever
  • 06 carried by the movable breaker contact support acts to bridge thecontacts
  • FIG. 1 Another form of interlock which may be used with my switch construction illustrated in Figs. 1 to 4 is a simple mechanical interlock illustrated in Figs. 1 and 6,.
  • 04 of the circuit breaker directly pivoted to a substantially V shaped lever
  • 20 is pivoted tothe movable bridging contact
  • an open substantially rectangular supporting frame insulating mea-ns carrying a contact in the frame and mounted on one side thereof, other insulating means carrying a switch blade member movably mounted in said frame adjacent the opposite side thereof, a bus bar spaced from said frame and extending across an open side thereof so that said blade member is movable through said frame into and out of bridging relation with said contact and bus bar.
  • insulating means carrying a contact in the frame and mounted on one side thereof, other-insulating means carrying a switch blade member movably mounted in said frame adjacent the op-4 posite side thereof, a bus bar spaced from said frame and extending across an open side thereof soL that said blade member is movable through said frame into and out of bridging relation with said contact and bus bar, and insulating means supporting said bus bar from said frame.
  • a switch a pair of spaced contact members, a movably mounted split blade member adapted in the closed position of the switch to bridge said contact members with said contact mem rs received between the sides of said split blade member, said blade member having spaced raised limited area contact portions for engaging said contact members at the closed position of said switch, and spaced means for securing the sides of said split blade member together positioned on corresponding sides of said contact members, respectively, so as topermit movement of said blade member along a line from one of said contact members passing through the other of said contact members, and for limiting movement of said blade member into engagement with said contact members so that in the closed position of the-switch said contact portions engage the parts of said contact members adjacent the edges thereof facing the path oi opening movement of said blade member.
  • an open substantially rectangular supportingrame insulating means carrying a' contact in the frame ,and supported on one side of said frame, other 5 insulating means carrying a switch blade, said other insulating means pivotally mounted in said frame adjacent the opposite side thereof, a second contact supported at a point spaced from the plane of said frame in a position such that said 10 blade member is movable through said frame into and out of bridging relation with respect to said contacts.
US319889A 1940-02-20 1940-02-20 Switchgear Expired - Lifetime US2331632A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US319889A US2331632A (en) 1940-02-20 1940-02-20 Switchgear
DES4694D DE940126C (de) 1940-02-20 1941-02-21 Schalteinrichtung fuer Hochspannung, insbesondere Trennschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US319889A US2331632A (en) 1940-02-20 1940-02-20 Switchgear

Publications (1)

Publication Number Publication Date
US2331632A true US2331632A (en) 1943-10-12

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ID=23244027

Family Applications (1)

Application Number Title Priority Date Filing Date
US319889A Expired - Lifetime US2331632A (en) 1940-02-20 1940-02-20 Switchgear

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Country Link
US (1) US2331632A (de)
DE (1) DE940126C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096997B (de) * 1954-01-25 1961-01-12 Licentia Gmbh Kontaktmesser aufweisendes, um einen Bolzen schwenkbares Trennlaschenpaket
WO2015110294A1 (de) * 2014-01-23 2015-07-30 Abb Technology Ag Erdungsschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1091178B (de) * 1957-06-27 1960-10-20 Licentia Gmbh Masthoernerschalter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE474374C (de) * 1929-04-05 Voigt & Haeffner Akt Ges Anordnung fuer Freileitungsanlagen
DE474295C (de) * 1927-08-07 1929-04-02 Aeg Hochspannungstrennschalter haengender Ausfuehrung, bei dem der das Schaltmesser tragende Schaltisolator mittels eines unstarren Gliedes (Kette, Seil o. dgl.) gehoben undgesenkt wird
GB372109A (en) * 1931-05-19 1932-05-05 English Electric Co Ltd Magazine switch fuses
DE670275C (de) * 1934-08-30 1939-01-14 Aeg Trennschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096997B (de) * 1954-01-25 1961-01-12 Licentia Gmbh Kontaktmesser aufweisendes, um einen Bolzen schwenkbares Trennlaschenpaket
WO2015110294A1 (de) * 2014-01-23 2015-07-30 Abb Technology Ag Erdungsschalter
CN106030743A (zh) * 2014-01-23 2016-10-12 Abb技术有限公司 接地开关
US9799470B2 (en) 2014-01-23 2017-10-24 Abb Technology Oy Earthing switch
CN106030743B (zh) * 2014-01-23 2018-06-12 Abb技术有限公司 接地开关

Also Published As

Publication number Publication date
DE940126C (de) 1956-03-08

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