US3749867A - Spaced-metallic-plate-type of arc-chute for a switch - Google Patents

Spaced-metallic-plate-type of arc-chute for a switch Download PDF

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Publication number
US3749867A
US3749867A US00135107A US3749867DA US3749867A US 3749867 A US3749867 A US 3749867A US 00135107 A US00135107 A US 00135107A US 3749867D A US3749867D A US 3749867DA US 3749867 A US3749867 A US 3749867A
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United States
Prior art keywords
contacts
separable
main
plate structure
arc
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Expired - Lifetime
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US00135107A
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English (en)
Inventor
J Rexroad
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CBS Corp
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Westinghouse Electric Corp
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • minor closed-end slots are, additionally, provided in the plate structure to tend to promote arc transfer movement from the separable main contacts into the spaced plate structure, to thereby provide additional cooling and .deionization effects.
  • curved minor closed-end slots are provided adjacent the main separable contact structure to additionally magnetically promote arc transfer movement from the main separable contacts into the plate structure for increased cooling and deionization effects.
  • Main switches and branch switches may be used together, the main switches, of course, carrying a greater load current.
  • the particular switch application, with which the present application is concerned, is adapted for800, or lZOO-ampere current ratings, at a voltage, for example, of 600-volts A.C.
  • an improved spaced metallic plate-type of arc-chute for a switch having a relatively high-ampere current-carrying capacity may have main separable contacts as well as separable arcing contacts.
  • the interruption of high currents can result in arcing on both the main separable contacts, as wellras on the separable arcing contacts.
  • the spaced metallic plates are provided in close proximity to the main separable contacts, as well as providing a centrally-provided slot portion in the plates to accommodate the protruding tip portion of the centrally-located main arcing contacts.
  • minor closed-end slots the separable contactswith the spaced metallicplates may, additionally, be provided at the inner corners of the plates adjacent the separable main contacts to promote and assist arc transfer into the spaced metallic plates for effective cooling and deionizing action.
  • the same grid plate structure functions for both the arcing on the main as well as arcing on the separable arcing contacts.
  • curved closed-end minor slots are provided at the inner corners of the plates to expedite arc transfer fromthe main separable contacts intothe plate structure, as well as promoting the rapid transfer of the arc at the main separable arcing contacts.
  • Still a further object of the present invention is to provide an improved arc-chute structure, in which the spaced metallic plate structure is provided in close proximity to the main separable contacts.
  • Still a further object of the present invention is the provision of an effective arc-chute, in which special configuration of the spaced plates is utilized to promote transfer of the arcs from the main separable contacts into the plate structure, by the use of one or more minor closed-end slots provided in inner corners of the plate structure, in addition to the main centrallyprovided slot for the accommodation of the protruding movable arcing contact.
  • Still a further object of the present invention is the provision of an improved arc-chute structure, which accommodates arcing at both the main and arcing sets of contacts on high-current interruption, and facilitates movement and transfer of the arcing into and through the spaced metallic plate structure.
  • FIG. 3 is an enlarged top plan view of one of the arcchutes of "FIG. 2, illustrating the inter-relationship of x of the arc-chute, and showing the close proximity of platernaterial to the main separable contacts;
  • FIG. 4 is a view illustrating the position of the several contact parts, and also the mechanism parts in the fully open-circuit position;
  • FIG. 5 is a view similar to that of FIG. 4, but illustrating the closed position of the switch
  • FIG. 6 illustrates, fragmentarily, a side elevational and partly sectional view taken through the improved arc-chute structure and the manner of arc interruption, with the contacts shown in the closed position;
  • FIG. 7 is a perspective view of the stationarycontact support plate, or terminal plate, together with the stationary arcing horn affixed thereto. The view also shows the stationary main contacts for the two pairs of movable main contacts;
  • FIG. 8 illustrates, in perspective, the fiber insulating enclosure or wrapper for positively positioning the several spaced metallic arc plates of the improved arc chute structure for the switch contacts;
  • FIG. 9 illustrates one of severalarcing metallic plates used in the arc-chute structure of the improved Switch
  • FIG. 10 illustrates an alternate type of metallic arcing plate, which may be used in substitution of the arcing plate of FIG. 9;
  • FIG. 11 illustrates, in plan, the top arcing, or cover plate of the arc-chute structure
  • FIG. 12 illustrates another type of arcing plate, which may be used in substitution for the plates of FIGS. 9 and 10.
  • the reference numeral 1 generally designates panelboard equipment comprising, forexample, a main-line switch, generally designated by the reference numeral 2, and controlling a number of branch feeder switches, designated by the reference numerals 3-9.
  • the branch feeder switches, designated by the reference numerals 3-9, are not a part of the present invention, but may be referred to in U.S. Pat. No. 3,525,835, issued Aug. 25, I970, to Alexander R. Norden, and US. Pat. application filed Dec. 12, I969, Ser. No. 889,804 (W.E. 41,480) by Alexander R. Norden, and also in the US. Pat. application filed Dec. 12, I969, Ser. No. 889,803, by Alexander R. Norden (WE. 41,481), all of the foregoing patents and applications being assigned to the assignee 0F the instant application.
  • the bus connections between the several switches are not illustrated in FIG. 1, but it may be assumed that the line-bus connections are controlled by the lowerdisposed main panelboard switch 2, which, through feeder-bus connections, are fed to the other branch switches 3-9, which may control various sub-branch circuits.
  • FIGS. 2-6 illustrate, in detail, the construction and operation of the improved switch construction 10 of the present invention.
  • the switch box enclosure 12 has a cover 13, which is hinged, as at 14, and may be opened or closed, a hasp 15 being provided.
  • the cover 13 may, of course, be padlocked in the open" or closed" positions.
  • the rotation of the manually operable handle 11 effects, through a shank portion 1 la, the rotation of a rotatable plate 16 (FIG. 4), which has an offcenter pivotal connection 17 to a link 18, which operates a reciprocally-operable slide, designated by the reference numeral 19.
  • the slide 19 is captive within four guides 20, as shown in FIG. 4, and may be reciprocally operated to effect the respective opening and closing operations of the switch mechanism 22.
  • an overcenter-type toggle mechanism 22 is provided to effect the opening and closing move
  • the main arcing movable contact 25c ofeach'pole-unit is spring-biased in a counterclockwise direction about its pivot rod 31, so that when the switch 10 is closed, as illustrated in FIG. '5, the contactcompression spring 35, individual to each contact finger, is compressed. Also, the main contact finger 27, 28-
  • the overcenter-type toggle mechanism 22 comprises a pair of pivotally-connected toggle links 37, 38, which, in fact, comprise pairs of links 37a,f38a.
  • FIGS. 4 and 5 show only a single toggle link 37 or 38,
  • the toggle-leg 37 comprising the two links 37a, is pivotally connected to a pair of spaced operating brackets 40, which are affixed by mounting screws 41 to the insulating tie-bar 34.
  • a pivot pin 42 extends through the rear portions of the operating brackets 40, and connects to the left-hand ends of the toggle-leg 37.
  • the two .toggle links, or legs 37, 38 are pivotally connected together to a knee-pin 44, which additionally serves as spring support for one end of each of two toggle-tension springs, designated by the reference numeral 46.
  • the other ends of the two toggle-tension springs 46 are connected to a rod 48, which bears within slots 49 providedin the ends of legs 50b of angularly-shaped operatinglevers 50, which are pivotally-supported on stationary pivots 51.
  • the stationary pivot-51 in fact, comprises a rivet, which extends through the sidewall53a of asideframe supp rt 53. I a
  • FIG. 2 illustrates, in more detail, the structural frame A rotatable releasable toggle pivot support,or trigger 65 is provided.
  • a rod 66 passes through the tubular sleeve 67, which is affixed to the central main body portion of the rotatable toggle pivot support, or'trig'ger 65.
  • the pivot rod 66 passes through suitably-provided apertures in the side walls of the side-frame supports 53, 54. It will be observed in FIG. 2 that the knee-pin 44 of the toggle linkage 39 has extended portions 44a,
  • FIG. 2 illustrates this more clearly.
  • a portion b of the body portion of the rotatable toggle support 65 serves as an overcenter stop. This posisiton is illustrated more clearly in FIG. 5 of the drawings. Additionally,- another portion 650 of the rotatable toggle support 65 serves a resetting function.
  • an electrically-actuated tripping lever is provided, of channelshaped configuration, having a 'roller 72 passing through one end theereof.
  • the tripping lever 70 is piv-v otally mounted on a rod 69 journaled in apertures of the frame 60.
  • This roller 72 normally maintains the toggle support 65 in a fixed latched position, as shown in FIGS. 4 and 5. Following energization of the solenoid 73, the latching lever 70 is released to thereby permit the toggle springs 46 to effect a counterclockwise rotation of the toggle support 65. In this position, the switch contacts 24,25 are, of course, open. To effect a resetting and a subsequent closing operation of the switch contacts 24, 25, the oerating' handle 11 is moved toward 'a fully-open position, as shown in FIG. 4.
  • each of the pole-units A, B and C has its -own fuse 82A, 82B and 82C.
  • the fuses 82A, 82B and 82C may be of l,200-amperes, 600-volts A.C., for example. Thus, the fuses provide fault, or overcurrent protection for the switch.
  • the moving contact support plates 90, 91 and 92 have extensions, constituting fuse-terminal plates a, 91a and 92a, which are secured by bolts 94 to the blades 95 of the fuses 82A, 82B and 82C.
  • the current consequently, passes through the fuses, and through the other fuse blades, which are bolted to the fuse contact bases, or terminals A, 1008 and 100C.
  • the load-terminal connectors F,, F and F Situated at the right-hand ends of the three fuse contact bases 100A, 100B and 100C, as viewed in FIG. 2, are the load-terminal connectors F,, F and F which may connect to the branch circuits controlled by the branch switches 3-9, as illustrated in FIG. 1.
  • FIGS. 2, 3 and 6 illustrate, in more detail, the arcchute structures 102, which are associated with each pair of separable switch contacts 24, 25.
  • the stationary contact structure comprises stationary main contact plates 24a, 24b (FIG. 7), and an upwardly-protruding stationary arcing contact 240, which overlies an arc-horn plate 24d. During the opening operation, arcing may take place between both the main contacts 24a, 24b and also the arcing contacts 24c.
  • the arc-chute structure 102 is adapted to accomplates 104 closely surrounds the extending tip 25c of the movable arcing contact 25c (FIG. 6).
  • shutning arcs 107, 108 may be established, both at the main contacts and also at the arcing contacts.
  • the provission of the body portions, designated by the reference numeral 104a, 10% in FIG. 9, provides anentrance for the arcs 107, 109
  • plate 104 was developed because of arcing on the main contacts and proved to be all right for normal use of the switch, but not for generalapplication with a shunt trip. There is a range of current values, for which the arc will develop in the corners 104e, 104d, and in using the plate 104, the arc stayed in the corners 104e, 104d.
  • the meta1 lic plate designated by the reference numeral 111, and illustrated in FIG. 10, was developed to get the arc to move out of the corners due to the magnetic forces. The moving arc would cool more, and thus the interrupting ability of the switch, as a whole, would be enhanced. It was found by test that a set of arc chutes 102 with the plates modified by the use of plates 11! was tested, and interrupted, whereas the standard plates I04 had failed in previous tests. The arcs were found to move away from the corners of the plate.
  • a switch structure including a pair of separable arcing contacts and two pairs of main contacts situated on both sides of said separable pair of arcing contacts, means establishing three arcs at both the two pairs of separable main and also at the separable arcing contacts, means defining a spaced metallic plate structure closely confining the separable arcing contacts as well .as confining the two pairs of main contacts, whereby the three parallel arcs are moved into the plate structure for arc-extinction purposes.
  • 7 The combination according to claim 1, wherein a centrally-arranged main arcing slot is provided to accommodate the separable arcing contacts, the latter protruding into the plate structure.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US00135107A 1971-04-01 1971-04-19 Spaced-metallic-plate-type of arc-chute for a switch Expired - Lifetime US3749867A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13037671A 1971-04-01 1971-04-01
US13510771A 1971-04-19 1971-04-19

Publications (1)

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US3749867A true US3749867A (en) 1973-07-31

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US00135107A Expired - Lifetime US3749867A (en) 1971-04-01 1971-04-19 Spaced-metallic-plate-type of arc-chute for a switch

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US (1) US3749867A (es)
JP (1) JPS5232066B1 (es)
AR (1) AR194094A1 (es)
AT (2) AT311469B (es)
AU (2) AU472522B2 (es)
BE (1) BE781360A (es)
CA (2) CA944798A (es)
CH (2) CH544997A (es)
DE (2) DE2215885C3 (es)
ES (1) ES401327A1 (es)
FR (1) FR2133596B1 (es)
GB (1) GB1383954A (es)
IT (1) IT950754B (es)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086460A (en) * 1977-03-17 1978-04-25 General Electric Company Circuit breaker having improved line strap construction
US4229630A (en) * 1980-03-17 1980-10-21 Westinghouse Electric Corp. Circuit breaker utilizing improved arc chambers
US4459445A (en) * 1981-03-02 1984-07-10 Mitsubishi Denki Kabushiki Kaisha Circuit breaker
US4612426A (en) * 1985-08-23 1986-09-16 Westinghouse Electric Corp. Arc chute assembly for circuit breaker
US4877929A (en) * 1987-08-31 1989-10-31 Merlin Gerin Breaking device for multipole electrical circuit breaker with multiple contacts
US5296660A (en) * 1992-02-07 1994-03-22 Merlin Gerin Auxiliary shunt multiple contact breaking device
US20060124602A1 (en) * 2004-12-14 2006-06-15 Eaton Corporation Arc chute assembly
US20110017709A1 (en) * 2009-07-22 2011-01-27 Prohaska Richard D Electrical switching apparatus and arc chute assembly therefor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247746A (en) * 1977-10-04 1981-01-27 Dorman Smith Switchgear Limited Electric circuit breaker
DE3139489A1 (de) * 1981-09-29 1983-07-07 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer elektrische leistungsschalter
DE3539673A1 (de) * 1985-11-06 1987-05-07 Siemens Ag Kontaktanordnung fuer niederspannungs-leistungsschalter mit hauptkontakten und abbrennkontakten
US4926018A (en) * 1988-09-08 1990-05-15 Siemens Energy & Automation, Inc. Moving mains arc movement loop
DE3912726A1 (de) * 1989-02-08 1990-08-09 Siemens Ag Lichtbogenloeschkammer mit loeschblechen
EP0626096B1 (en) * 1992-11-13 1997-07-16 Square D Company An improved arc extinguishing device
IT1266549B1 (it) * 1993-04-21 1997-01-09 Sace Spa Interruttore scatolato sezionabile
FR2711012B1 (fr) * 1993-10-05 1995-11-24 Merlin Gerin Disjoncteur à chambre d'extinction d'arc perfectionnée.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147419A (en) * 1935-06-19 1939-02-14 Westinghouse Electric & Mfg Co Circuit interrupter
US3513275A (en) * 1966-04-14 1970-05-19 Westinghouse Electric Corp Circuit breaker with improved current path and contact means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147419A (en) * 1935-06-19 1939-02-14 Westinghouse Electric & Mfg Co Circuit interrupter
US3513275A (en) * 1966-04-14 1970-05-19 Westinghouse Electric Corp Circuit breaker with improved current path and contact means

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086460A (en) * 1977-03-17 1978-04-25 General Electric Company Circuit breaker having improved line strap construction
US4229630A (en) * 1980-03-17 1980-10-21 Westinghouse Electric Corp. Circuit breaker utilizing improved arc chambers
US4459445A (en) * 1981-03-02 1984-07-10 Mitsubishi Denki Kabushiki Kaisha Circuit breaker
US4612426A (en) * 1985-08-23 1986-09-16 Westinghouse Electric Corp. Arc chute assembly for circuit breaker
US4877929A (en) * 1987-08-31 1989-10-31 Merlin Gerin Breaking device for multipole electrical circuit breaker with multiple contacts
US5296660A (en) * 1992-02-07 1994-03-22 Merlin Gerin Auxiliary shunt multiple contact breaking device
US20060124602A1 (en) * 2004-12-14 2006-06-15 Eaton Corporation Arc chute assembly
US7094986B2 (en) * 2004-12-14 2006-08-22 Eaton Corporation ARC chute assembly
US20110017709A1 (en) * 2009-07-22 2011-01-27 Prohaska Richard D Electrical switching apparatus and arc chute assembly therefor
US8247726B2 (en) 2009-07-22 2012-08-21 Eaton Corporation Electrical switching apparatus and arc chute assembly therefor

Also Published As

Publication number Publication date
FR2133596B1 (es) 1977-08-26
DE2218420A1 (de) 1972-10-26
GB1383954A (en) 1974-02-12
AT312736B (de) 1974-01-10
FR2133596A1 (es) 1972-12-01
JPS4735761A (es) 1972-11-25
AU472522B2 (en) 1973-09-20
CA944798A (en) 1974-04-02
DE2215885C3 (de) 1980-10-02
BE781360A (fr) 1972-09-29
DE2215885B2 (de) 1980-01-03
ES401327A1 (es) 1975-10-01
DE2215885A1 (de) 1972-10-19
AU3992672A (en) 1973-09-20
AR194094A1 (es) 1973-06-22
AU474143B2 (en) 1976-07-15
IT950754B (it) 1973-06-20
AT311469B (de) 1973-11-26
CH531785A (de) 1972-12-15
CA984436A (en) 1976-02-24
JPS5232066B1 (es) 1977-08-19
AU4019472A (en) 1973-09-27
CH544997A (de) 1974-01-15

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