US3590199A - Plug-in-type switchgear - Google Patents

Plug-in-type switchgear Download PDF

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Publication number
US3590199A
US3590199A US9376A US3590199DA US3590199A US 3590199 A US3590199 A US 3590199A US 9376 A US9376 A US 9376A US 3590199D A US3590199D A US 3590199DA US 3590199 A US3590199 A US 3590199A
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US
United States
Prior art keywords
plug
insulating
type
circuit interrupter
type terminal
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
US9376A
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English (en)
Inventor
Alfred E Maier
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
Original Assignee
Westinghouse Electric Corp
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 Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US3590199A publication Critical patent/US3590199A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/193—Means for increasing contact pressure at the end of engagement of coupling part, e.g. zero insertion force or no friction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
    • H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
    • H02B1/056—Mounting on plugboards

Definitions

  • Plug-in-type switchgear comprising plug-in support means and a plug-in-type circuit interrupter on said support means with improved means providing contact pressure between the support terminals and the interrupter terminals.
  • the arrangement also provides improved means operable to simultaneously secure the circuit interrupter to the support means and provide Contact pressure between the support terminals and the interrupter terminals.
  • Field of the Invention Switchgear of the type comprising an insulating support means and a circuit interrupter removably supported on the support means with plug-type terminals of the circuit interrupter in pIug-in-type engagement with plug-in-type terminals of the support means.
  • Improved switchgear comprises plug'in support means and a plug-in circuit interrupter removably supported on the support means.
  • the plug-in support means comprises a pair of insulating support blocks for supporting the opposite ends of the circuit interrupter.
  • Each of the support blocks supports a plurality of plug-in-type terminals that extend across the support block in a spaced relationship.
  • Each of the plug-in-type terminals comprises a pair of spaced-bar conductors supported on the support block in a spaced relationship for receiving a plug type breaker terminal therebetween.
  • a multipole plugin-type circuit interrupter is supported on the support blocks with the plug-type terminals of the interrupter in plug-in-type engagement with the plug-in-type terminals of the support means.
  • Each of the wedge-type terminal pressure means is a toggle structure comprising a pair of insulating members supported in toggle-type engagement.
  • An actuating bar having a tapped opening therein, is supported under the knee pivot of the insulating toggle.
  • the actuating bar When a bolt member is threaded into the actuating bar and rotated to draw the actuating bar frontward, the actuating bar operates on the knee pivot of the insulating toggle to erect the toggle during which movement the insulating toggle members force the adjacent conducting bars apart to thereby provide bolted contact pressure between the terminals of the support means and the terminals of the circuit interrupter.
  • the bolts that are utilized to secure the circuit interrupter to the support blocks are the same bolts that actuate the insulating togglesto provide bolted contact pressure between the plug-in-type terminals of the support means and the plug-type terminals of the circuit interrupter.
  • FIG. I is a top plan view of plug-in-type support means and a plug-in-type circuit interrupter bolted on the support means;
  • FIG. 2 is a side elevational view, with parts broken away, and with the circuit interrupter disconnected, of the switchgear of FIG. 1;
  • FIG. 3 is an end view, with parts broken away, of the switchgear seen in FIG. 2;
  • FIG. 4 is a bottom plan view of one of the plug-in-type supports seen in FIGS. l--3;
  • FIG. 5 is a sectional view taken generally along the line V- V of FIG. 4 looking in the direction of the arrows;
  • FIG. 6 is a sectional view of the plug-in support as seen in FIG. 5 with a sectional view of the circuit interrupter mounted on the plug-in support and with the terminal pressure means in the bolted contact pressure position;
  • FIG. 7 is a perspective view of one of the insulating toggles and one of the actuating bars seen in FIGS. 5 and 6.
  • plug-in-type switchgear 5 comprising plug-in-type support means 7 and a plug-in-type circuit interrupter 9.
  • the plug-intype support means 7 comprises a pair of plug-in-type supports 11.
  • EAch of the plug-in supports 11 (FIGS. 4 and 5) comprises a molded insulating support block 13 and threepole-unit pIug-in-type terminals 15 supported on the support block 13 in a spaced relationship across the support block 13.
  • Each of the pole-unit plug-in-type terminals 15 comprises a pair of flat faced conducting bars 17 fixedly secured to the support block 13 in a spaced parallel relationship by means of pair of bolt structures 19.
  • the insulating support block 13 comprises a generally planar front 21 and the block 13 is formed with three cavities 23 open at the front for receiving plug-type terminals in a manner to be hereinafter described.
  • Each pair of bar conductors 17 extends frontward into the cavities 23 (FIG. 5), and backward out past the bottom of the associated support block 11 (FIGS. 2 and 3).
  • a separate terminal pressure means 27 (FIGS. 4 and 5) is supported on the support block 13 between each of the outer pole-unit terminals 15 and the center pole-unit terminal 15.
  • Each of the terminal pressure means 27 comprises a pair of rigid molded insulating toggle members 29, 31 and a rigid metallic actuating bar 33, which parts are supported on the support block 13 by means of a pair of screws 35 and coil springs 37.
  • the insulating toggle members 29, 31 are separate members.
  • the two insulating toggle members 29, 31 are placed together as shown in FIG. 5 and the actuating bar 33 is placed in a pocket 39 between the toggle members 29, 31.
  • the parts 29, 31, 33 are then moved up into the position shown in FIG.
  • a leg portion 45 of the toggle member 20 comprises a pivot surface means 47 (FIGS. 5 and 7) that engages similar pivot surface means 47 of a leg portion ductors 5 7, 59, that extend toward opposite ends of the pole unit.
  • the circuit interrupter 9 comprises an operating mechanism and trip device of the general type shown, for example, in the patent to Stephenson Jr. ct al. U.S. Pat. No. 3, 21 l, 860 issued Oct. I2, 1965.
  • the operating mechanism and trip device are operable to simultaneously operate the con tacts 55 of the three-pole units in a well known manncr. As is best seen in FIGS.
  • each of the plug-type terminals 61 comprises opposite parallel generally flat faces for cooperation with the internal flat faces of the spaced bar conductors of the associated plugin type terminal 15 on the support 13.
  • FIG. 1 there are four openings through the insulating housing 51 of the circuit interrupter 9 for receiving four mounting bolts 71 that are utilized to secure the circuit interrupter 9 to the support means 7 and to operate the terminal pressure means 27 for providing contact pressure between the plug-in-type terminals 15 of the support means 7 and the plug-type terminals 61 of the circuit interrupter 9.
  • the two support blocks 13 are supported on a panel (such as a panel 76 indicated by broken lines in FIG. 3) by means of a plurality of bolts that extends through openings 75 (FIGS. 1 and 4-6) in the support blocks 13.
  • a pair of holes 77 are provided at the bottom end of each of the bar conductors 17.
  • a bus bar is positioned between the lower ends of each pair of bar conductors l7 and fixedly secured to the associated pair of bar conductors 17 by means of a pair of bolts that extend through the openings 77 and through openings in the bus bar.
  • the circuit interrupter 9 can be plugged onto the support means 7 to control the circuits through the bus bars at the installation.
  • the circuit interrupter 9 is shown in the disconnected position in FIGS. 2 and 3 with the plug-in support means 11 shown in the disconnected unactuated position in FIG. 5.
  • the circuit interrupter 9 is moved down onto the front surfaces 21 (FIG. )-of the support blocks 13 during which movement the plug-type terminals 61 of the circuit in' terruptcr 9 move into plug-in-type engagement with the plugin-type terminals 15 of the support means 7.
  • the four mounting bolts 71 (FIG. 1) are passed down through the four openings in the insulating housing 51 of the circuit interrupter 9, and each of the bolts is threaded into a tapped opening 79 (FIG. 7) in the associated actuating bar 33.
  • the insulating toggle members 29, 31 are in the underset position.
  • the bolts 71 are tightened drawing the actuating bars 33 frontward to thereby operate the insulating toggles 29, 31 from the unactuated undcrset position seen in FIG. 5 to the actuated erected position seen in FIG. 6.
  • the leg portion 45 of the insulating toggle member 29 engages the leg portion 419 of the insulating toggle member 31 at the pivot surfaces 47 (FIGS. 5 and 7).
  • these leg portions 45, 49 engage at what can be termed a knee pivot 17 of the toggle members.
  • bolted contact pressure is applied to the plug-in contacts of the switchgear.
  • a separate spring washer 84 is positioned under the head of each bolt 71 to maintain pressure during expansion and contraction of parts.
  • the bolts 71 serve to fixedly secure the circuit interrupter 9 on the support means 7 and to provide bolted contact pressure between the plug-in-typc terminals 15 of the support means 7 and the plug-type terminals 61 of the circuit interrupter 9.
  • the bolts 71 are operated to force the actuating bars 33 from the position seen in FIG. 6 to the position seen in FIG. 5 during which movement the toggle members 29, 31 are operated from the actuated pressure exerting erected position seen in FIG.
  • the bar conductors 17 flex sufficiently to provide contact pressure under the force of the toggle members 29, 31 which are operated by the bolts 71 so that bolted pressure is applied to the plug-in-type terminals by means of the mounting bolts 71 of the switchgear.
  • Two additional top openings 87 and 89 are provided in the bar 33 for receiving mounting bolts of other styles of circuit intcrrupters that have differently spaced openings therein for receiving the mounting bolts 71.
  • plug-in support means comprising insulating support means and plug-in type terminal means on said insulating support means
  • circuit interrupter comprising a circuit interrupter housing and plug-type terminal means on said circuit interrupter housing
  • circuit interrupter removably mounted on said plug-in support means with said plug-type terminal means in plug-in cooperating engagement with said plug-in-type terminal means
  • mounting and terminal pressure means securing said circuit interrupter to said plug-in support means and providing a contact-pressure bias between said plug-type terminal means and said plug-in-type terminalmeans.
  • said mounting and terminal pressure means comprising bolt means securing said circuit interrupter to said plug-in support means and simultaneously providing a bolted contact pressure bias between said plug-type terminal means and said plug-in-type terminal means.
  • said plug-in support means comprising a generally planar front
  • said circuit interrupter mounted on said plug-in support means at the front of said plug-in support means with said plug-type terminal means in plug-in cooperating engagement with said plug-intype terminal means
  • said mounting and terminal pressure means comprising wedge type terminal pressure means on said insulating support means and mounting bolt means cooperating with said wedgctypc terminal pressure means to bolt said circuit interrupter housing to said insulating support means and to simultaneously actuate said wedge-type terminal pressure means to provide a bolted contact pressure bias between said plug-type terminal means and said plug-in-type terminal means.
  • wedgetype terminal pressure means comprising insulating toggle means operated by said mounting bolt means into an actuated erected condition to provide said bolted contact pressure bias between said plug-type terminal means and said plug-in-type terminal means.
  • said plug-in support means comprising a row of three spaced plug-in-type terminals across said insulating support means in proximity to one end thereof and a row of three spaced plug-in-type terminals across said insulating support means in proximity to the other end thereof
  • said circuit interrupter comprising a row of three spaced plug-type terminals across said circuit interrupter I'IOUSIl'lg in proximity to one end thereof and a row of three spaced plug-type terminals across said circuit interrupter housingin vproximity to ,the'other, end'thereof, saidcircuit interrupter'removably supported on saidinsulating sup;
  • terminal pressure means with each of said-plug-typ'e terminals in plug-in cooperating engagement with a separate one of said plug-in type terminals, said terminal pressure means comprising.
  • each of said insulating toggle-type terminal pressure means positioned in a separate space between a center pole" plug-in-type terminal and an outer pole plug-in-type terminal, a separate mounting bolt for each of said insulating toggletype terminal pressure means, each of said separate mountingbolts cooperating with said circuit interrupter housing and the associated insulating toggle-type .terminal'pressure' means to secure said circuit interrupter to said plug-in support means .and to erect the associated insulating toggle-type terminal their associated six plug-in -type terminals.
  • said plug-in support means comprising an insulating support block and. a pair of polewunit plug-in-type terminals on said insulating support block in a spaced relationship across said support block, 'each of said plug-in-typeterminals comprising alpairot spaced-bar conductors supported in a spaced relationship on said support block, said circuit interrupter comprising a circuit interrupter housing andapair of pole-unit plug-type terminals supported in a spaced relationship on said housing in proximity to one end of said housing, I said circuit interrupter supported with said one end of said 1 housing on said support block and with each of said plugtype terminals cooperating with a separate one-of said .plug-in-type terminals with'each of said plug-type terminals disposed between the bar conductors of the associated plug-in-type terminal, tenninal pressure means on said support block between said plug-in-type terminals, said terminal pressure means comprising insulating wedge-type pressuremeans between a first bar conductor of one of said pairs of bar
  • said insulating wedge-type terminal pressure means comprising an actuating member having a tapped opening therein and positioned opposite the pivot of said insulating toggle members, a bolt member threadedly engaging said actuating member and rotatable to draw said actuating member to an actuating position during which movement said actuating member operates against said pivot to erect said insulating toggle members to provide contact pressure between said plug-type terminals and said lug-in-ty eterminals.
  • Multipole plug-in support means for supporting a multipole plug-in-type circuit interrupter, said support means comprising an insulating support block, a pair of pole-unit plug-in-type terminals on said insulating support block in a spaced relationship on said insulating support block for cooperating with a pair of plug-type terminals of said circuit interrupter, each of said plug-in-type terminals comprising a pair of spaced generally'flat bar conductors for receiving one of said plug-type terminals therebetween, insulating wedgetype terminal pressure means on said insulating support block between a first bar conductor of one of said plug-in-type terrn'inalsf and a first bar conductor of the other of said plug-intype terminals, said insulating wedge-type terminal pressure means being operable from an .unac'tuated position to an'actuated position to force said first bar conductors away from each other to provide contact pressure between said plug-in-type terminals and said plug-type terminals.
  • said insulating wedge-type terminal pressure means comprising a pair of insulating toggle members supported on said support block between said first bar conductors in an underset unactuated position, actuating means operable to actuate said insulatingtoggle members to an actuated erected position wherein said insulating toggle members force said fir'stbar conductors away from each other to provide contact pressure between said plug-in-type terminals and said plug-type terminals.
  • Multipole plug-in support means said insulating toggle members being in pivotal engagement at a knee pivot, said actuating means comprising an actuating member having a tapped opening therein forreceiving an actuating bolt which may be threaded into said tapped opening whereby said actuating bolt can be operated from the front of said support meansto draw said actuating member to the actuated position.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
US9376A 1970-02-06 1970-02-06 Plug-in-type switchgear Expired - Lifetime US3590199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US937670A 1970-02-06 1970-02-06

Publications (1)

Publication Number Publication Date
US3590199A true US3590199A (en) 1971-06-29

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Application Number Title Priority Date Filing Date
US9376A Expired - Lifetime US3590199A (en) 1970-02-06 1970-02-06 Plug-in-type switchgear

Country Status (4)

Country Link
US (1) US3590199A (enrdf_load_stackoverflow)
JP (1) JPS5024020B1 (enrdf_load_stackoverflow)
GB (1) GB1290638A (enrdf_load_stackoverflow)
ZA (1) ZA71296B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277664A (en) * 1979-08-24 1981-07-07 Westinghouse Electric Corp. Circuit breaker structure
DE3442060A1 (de) * 1984-11-17 1986-05-28 Ilija Dr.-Ing. 8000 München Doganoff Sanierungsvorrichtung fuer schadhafte fassadenbekleidungen aus werksteinplatten
US5161422A (en) * 1991-07-12 1992-11-10 Prince Corporation Universal control for electrically controlled vehicle transmission
WO2004055851A1 (de) * 2002-12-13 2004-07-01 Siemens Aktiengesellschaft Niederspannungs-leistungsschalter
US9460881B1 (en) * 2015-04-30 2016-10-04 Eaton Corporation Compact plug and socket unit isolator systems for motor control centers (MCC) and related MCC cabinets

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211960A (en) * 1960-12-07 1965-10-12 Westinghouse Electric Corp Insulating mounting block and circuit interrupting device
US3328647A (en) * 1966-03-16 1967-06-27 Ite Circuit Breaker Ltd Mounting assembly including front connected separable connectors
US3328648A (en) * 1966-04-29 1967-06-27 Ite Circuit Breaker Ltd Combination plug-in block with current transformers
US3366844A (en) * 1965-10-23 1968-01-30 Ite Circuit Breaker Ltd Reversible connector arrangement
US3474206A (en) * 1968-04-25 1969-10-21 Ite Imperial Corp Circuit breaker mounting and removal jack screw combination
US3492539A (en) * 1968-08-21 1970-01-27 Ite Imperial Corp Mounting arrangement for an electrical switching device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211960A (en) * 1960-12-07 1965-10-12 Westinghouse Electric Corp Insulating mounting block and circuit interrupting device
US3366844A (en) * 1965-10-23 1968-01-30 Ite Circuit Breaker Ltd Reversible connector arrangement
US3328647A (en) * 1966-03-16 1967-06-27 Ite Circuit Breaker Ltd Mounting assembly including front connected separable connectors
US3328648A (en) * 1966-04-29 1967-06-27 Ite Circuit Breaker Ltd Combination plug-in block with current transformers
US3474206A (en) * 1968-04-25 1969-10-21 Ite Imperial Corp Circuit breaker mounting and removal jack screw combination
US3492539A (en) * 1968-08-21 1970-01-27 Ite Imperial Corp Mounting arrangement for an electrical switching device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277664A (en) * 1979-08-24 1981-07-07 Westinghouse Electric Corp. Circuit breaker structure
DE3442060A1 (de) * 1984-11-17 1986-05-28 Ilija Dr.-Ing. 8000 München Doganoff Sanierungsvorrichtung fuer schadhafte fassadenbekleidungen aus werksteinplatten
US5161422A (en) * 1991-07-12 1992-11-10 Prince Corporation Universal control for electrically controlled vehicle transmission
WO2004055851A1 (de) * 2002-12-13 2004-07-01 Siemens Aktiengesellschaft Niederspannungs-leistungsschalter
US20060145795A1 (en) * 2002-12-13 2006-07-06 Siemens Aktiengesellschaft Low-voltage circuit breaker
CN100342471C (zh) * 2002-12-13 2007-10-10 西门子公司 低压断路器
US7470870B2 (en) 2002-12-13 2008-12-30 Siemens Aktiengesellschaft Low-voltage circuit breaker
US9460881B1 (en) * 2015-04-30 2016-10-04 Eaton Corporation Compact plug and socket unit isolator systems for motor control centers (MCC) and related MCC cabinets
US9941645B2 (en) 2015-04-30 2018-04-10 Eaton Intelligent Power Limited Compact plug assemblies for plug and socket unit isolator systems for motor control centers (MCC)

Also Published As

Publication number Publication date
JPS5024020B1 (enrdf_load_stackoverflow) 1975-08-12
GB1290638A (enrdf_load_stackoverflow) 1972-09-27
ZA71296B (en) 1971-10-27

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