US2967287A - Neutral bar assembly - Google Patents

Neutral bar assembly Download PDF

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Publication number
US2967287A
US2967287A US631552A US63155256A US2967287A US 2967287 A US2967287 A US 2967287A US 631552 A US631552 A US 631552A US 63155256 A US63155256 A US 63155256A US 2967287 A US2967287 A US 2967287A
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United States
Prior art keywords
neutral
neutral bar
bar
bases
apertures
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Expired - Lifetime
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US631552A
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Sori Salvatore
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ITE Circuit Breaker Co
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ITE Circuit Breaker Co
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Publication date
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Priority to US631552A priority Critical patent/US2967287A/en
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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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/2483—Terminal blocks specially adapted for ground connection

Definitions

  • a primary object of this invention is to provide the above described type of device to be hereinafter described as a neutral bar assembly which utilizes standardized components for any required number of terminal positions and is simply and economically manufactured.
  • Each neutral base has apertures therein in identical positions, which apertures receive and support a neutral bar of conductive material.
  • the neutral bar has means associated therewith such as terminal openings for connecting to the various current conductors which are to be co-nnected at the same isolated potential.
  • this neutral bar could be a tube of copper having apertures therein for receiving the conductive leads and a respective wire pressure screw appropriately positioned with respect to each of said apertures for maintaining the conducto-r rigidly fastened within its respective aperture.
  • a tube of copper having the required apertures and screw holes may be cut to lengths in accordance with the number of lead wires to be connected to a common potential.
  • the two identical neutral bases are then positioned at either end of the bar and receiving the bar in their respective apertures to support the copper bar from the support in insulated relationship therewith by virtue of the insulating liner interposed between the bases and the support as well as by the insulating bases.
  • Another object of this invention is to provide a novel neutral bar assembly which offers simple manufacture and easy installation.
  • Figure 2 shows a top plan view of the neutral bar.
  • Figure 2-A shows a side view of Figure 2 when taken across the lines 2A-2A.
  • Figure 4 shows atop view of Figure 3.
  • Figure 5 shows a side view of Figure 3.
  • Figure 6 shows a front view of an embodiment of Figure 1 wherein a bonding screw serves the dual function of bonding the neutral bar to ground as well as fastening one neutral base to the support,
  • Figure 7 shows an electrical diagramof an application of my novel device to a single phase system.
  • an electrical circuit comprising the transformer 20 has a center tapped secondary Winding 22 which energizes a first and second load 24 and 26 respectively through the circuit interrupting devices 28 and 30 respectively.
  • the center wire 32 as well as conductor leads 34 and 36 of loads 24 and 26 respectively are connected to a common potential and this common potential is then brought to the ground potential of the ground lead 3S.
  • each of the conductor leads 32, 34, 36 and 38 are interconnected by means of the current carrying member or neutral bar 40.
  • circuit breakers 28 and 30 are mounted within a common enclosure as indicated by the dotted box 31, and it is desirable that wires 32, 34, 36 and 38 be connected within the enclosure as seen in Figure 7.
  • the essence of my invention is to construct a neutral bar assembly or an assembly for carrying the bar 40 in an insulated relationship with respect to conductive materal adjacent the neutral bar and to allow a convenient method for interconnecting lead wires to be connected together within an enclosure such as the enclosure 31 of Figure 7.
  • FIGS 1, 3, 4 and 5 are perspective, front, top and side views respectively.
  • the neutral bar 40 ( Figures 2 and 2-A) is comprised of a tube of conductive material having apertures 42, 44, 46 and 48 therein which are adapted to receive the leads of electrical connectors and also have wire pressure screws 50, S2, 54 and 56 respectively for cooperating with their respective apertures to insure a good connection between the respective conducting leads and the neutral bar 40.
  • This neutral bar 40 is mounted on and supported by an enclosure wall 3l by means of the two identical neutral insulating bases 58 and 60, which are positioned at either end of the neutral bar 40, by means of mounting screws 64 and 66 respectively as is best seen in Figure 3.
  • the neutral insulating liner 62 is interposed between bases 58 and 60 and enclosure wall 31 to provide further dielectric separation between the bar I4t) and the enclosure 31, if required.
  • Each of the neutral bases 58 and I60 has trst apertures 68 and 70 respectively, and second apertures 72 and 74 respectively therein.
  • Each aperture as may be best seen in Figure 5 for the case of aperture 72, is shaped to cooperate with the cross sectional shape of the neutral bar 40.
  • the neutral bar may be easily and simply inserted Within one of the apertures 68 or 72 of neutral base S8 or apertures 70 or 74 of neutral base 60' depending upon the relative positioning of either of these bases.
  • a length of neutral bar is cut in accordance with the required number of terminal positions which is given by the number of conductors which are to be connected to a common potential for a given application. This predetermined length of conductor is then inserted in the respective apertures of 3. neutral bases 53 and 6G, and the neutral bases are fastened to the liner.
  • the liner 62 has apertures therein to pass the required mounting screws.
  • FIGS. 3 and 4 show the bonding screw 82 as being fastened to the support 3l and positioned intermediate between fastening screws 64 and 66
  • Figure 6 shows that the screw S2 could be so positioned as to further serve the purpose of mounting screw 64. That is to say, bonding screw 82 could provide the bonded neutral as well as provide the fastening between neutral base S8 and the liner 62.
  • Figure la I have illustrated a modified embodiment of the neutral bar assembly of Figure l.
  • all components corresponding to the components of Figure l are identified by a similar numeral with a prime.
  • two identical bases 5S and 6b are provided to support the neutral bar 40.
  • the embodiment of Figure la differs from that of Figure l in that the neutral bases S8 and 66 do not require openings to receive the neutral bar 40 4 since this unit is supported on top of the bases in any desirable manner.
  • a neutral bar assembly for electrically connecting a plurality of conductors; said neutral bar assembly comprising a irst and a second base of insulating material, a common member, a neutral bar, and a neutral liner interposed between said bases and said common member, a -first and a second member fastening said first and said second bases, respectively, to said common member; each ot said iirst and second bases having a iirst and a second opening therein; said neutral bar having a lirst end supported in the lirst of said openings of said irst base and another end supported in the second of said openings of said second base; said neutral bar comprising a length of conductive material having apertures therein for respectively receiving electrical conductors and means for applying pressure between said electrical conductors and said neutral bar when said conductors are inserted in said apertures; said tirst and second bases having identical constructions and being interchangeable with one another; said iirst member

Description

Jan. 3, 1961 Filed Deo. 3l, 1956 s. soRl 2,967,287
NEUTRAL BAR ASSEMBLY -2 Sheets-Sheet 1 L, l 4Z 4@ 44 2A 46 Jan. 3, 1961 s. soRl NEUTRAL BAR ASSEMBLY 2 Sheets-Sheet 2 'Filed Dec. 51, 1956 /Z Tra/@NWI United States Patent O NEUTRAL BAR ASSEMBLY Salvatore Sori, Woodbury, NJ., assigner to I-T-E Circuit Breaker Company, Philadelphia, Pa., a corporation of Pennsylvania Filed Dec. 31, 1956, Ser. No. 631,552
1 Claim. (Cl. 339-198) My invention relates to an electrical connector for electrically connecting a plurality of electrical conductors to a common potential.
A primary object of this invention is to provide the above described type of device to be hereinafter described as a neutral bar assembly which utilizes standardized components for any required number of terminal positions and is simply and economically manufactured.
More specically, the complete assembly is supported from a support member and comprises first and second neutral insulating bases which are of identical construction and are fastened to the support member through an insulating liner.
Each neutral base has apertures therein in identical positions, which apertures receive and support a neutral bar of conductive material. The neutral bar has means associated therewith such as terminal openings for connecting to the various current conductors which are to be co-nnected at the same isolated potential. If desired, this neutral bar could be a tube of copper having apertures therein for receiving the conductive leads and a respective wire pressure screw appropriately positioned with respect to each of said apertures for maintaining the conducto-r rigidly fastened within its respective aperture.
Thus, a tube of copper having the required apertures and screw holes may be cut to lengths in accordance with the number of lead wires to be connected to a common potential. The two identical neutral bases are then positioned at either end of the bar and receiving the bar in their respective apertures to support the copper bar from the support in insulated relationship therewith by virtue of the insulating liner interposed between the bases and the support as well as by the insulating bases.
If it is desired to ground the neutral bar to the support member, it is possible to have a bonding screw protrude through and engage the neutral bar and pass through the liner into engagement with the support structure. Thus, an electrical engagement will be completed between the neutral bar and the support member by the bonding screw.
Accordingly, an important object of my invention is to provide a novel neutral bar assembly.
Another object of this invention is to provide a novel neutral bar assembly which offers simple manufacture and easy installation.
Another object of my invention is to provide a novel connecting means for connecting a plurality of current conductors to one another in a convenient manner.
These and other objects of my invention will become apparent from the following description when taken in conjunction with the drawings in which:
Figure 1 shows a perspective View of the neutral bar assembly of my invention when mounted to an enclosure wall or support member.
Figure la shows a perspective view of a modified neutral bar assembly of my invention.
Figure 2 shows a top plan view of the neutral bar.
ICC
Figure 2-A shows a side view of Figure 2 when taken across the lines 2A-2A.
Figure 3 shows a front view of the assembled device of Figure 1.
Figure 4 shows atop view of Figure 3.
Figure 5 shows a side view of Figure 3.
Figure 6 shows a front view of an embodiment of Figure 1 wherein a bonding screw serves the dual function of bonding the neutral bar to ground as well as fastening one neutral base to the support,
Figure 7 shows an electrical diagramof an application of my novel device to a single phase system.
Referring lrst to Figure 7, it is seen that an electrical circuit comprising the transformer 20 has a center tapped secondary Winding 22 which energizes a first and second load 24 and 26 respectively through the circuit interrupting devices 28 and 30 respectively.
In some cases, the center wire 32 as well as conductor leads 34 and 36 of loads 24 and 26 respectively are connected to a common potential and this common potential is then brought to the ground potential of the ground lead 3S. In order to do this, each of the conductor leads 32, 34, 36 and 38 are interconnected by means of the current carrying member or neutral bar 40.
In common practice, the circuit breakers 28 and 30 are mounted within a common enclosure as indicated by the dotted box 31, and it is desirable that wires 32, 34, 36 and 38 be connected within the enclosure as seen in Figure 7.
The essence of my invention is to construct a neutral bar assembly or an assembly for carrying the bar 40 in an insulated relationship with respect to conductive materal adjacent the neutral bar and to allow a convenient method for interconnecting lead wires to be connected together within an enclosure such as the enclosure 31 of Figure 7.
A rst embodiment of my novel invention is set forth in Figures 1, 3, 4 and 5 which are perspective, front, top and side views respectively.
In each of these gures the neutral bar 40 (Figures 2 and 2-A) is comprised of a tube of conductive material having apertures 42, 44, 46 and 48 therein which are adapted to receive the leads of electrical connectors and also have wire pressure screws 50, S2, 54 and 56 respectively for cooperating with their respective apertures to insure a good connection between the respective conducting leads and the neutral bar 40.
This neutral bar 40 is mounted on and supported by an enclosure wall 3l by means of the two identical neutral insulating bases 58 and 60, which are positioned at either end of the neutral bar 40, by means of mounting screws 64 and 66 respectively as is best seen in Figure 3. The neutral insulating liner 62 is interposed between bases 58 and 60 and enclosure wall 31 to provide further dielectric separation between the bar I4t) and the enclosure 31, if required.
Each of the neutral bases 58 and I60 has trst apertures 68 and 70 respectively, and second apertures 72 and 74 respectively therein. Each aperture, as may be best seen in Figure 5 for the case of aperture 72, is shaped to cooperate with the cross sectional shape of the neutral bar 40.
Thus, the neutral bar may be easily and simply inserted Within one of the apertures 68 or 72 of neutral base S8 or apertures 70 or 74 of neutral base 60' depending upon the relative positioning of either of these bases.
In order to `assemble the device, a length of neutral bar is cut in accordance with the required number of terminal positions which is given by the number of conductors which are to be connected to a common potential for a given application. This predetermined length of conductor is then inserted in the respective apertures of 3. neutral bases 53 and 6G, and the neutral bases are fastened to the liner.
it is to be noted that neutral base S could be first fastened to the support 31 and have the left-hand end of neutral bar 46 vinserted in aperture 72. The'neutral base 60 may then be brought into position so that the right-hand end of neutral bar 4@ is inserted within aperture 70 and the base 6th may thereafter be fastened in position by means of its mounting screw 66.
Clearly, the liner 62 has apertures therein to pass the required mounting screws.
Hence it is clear that my neutral bar assembly is easily adjusted to accommodate as many terminals as is required by merely using appropriate length of a neutral bar. Furthermore, the neutral bases 5S and 6d are interchangeable and are fastened to the support dit at whatever point necessary as given by the particular length of the neutral bar 40.
If desired, it is then possible to pass a bonding screw such as the bonding screw S2, as best seen in Figure 3, and into engagement with support 3l. The effect of this bonding screw 82. provides a bonded neutral and brings the potential of neutral bar 49 to the potential of the support of enclosure 31.
hile Figures 3 and 4 show the bonding screw 82 as being fastened to the support 3l and positioned intermediate between fastening screws 64 and 66, Figure 6 shows that the screw S2 could be so positioned as to further serve the purpose of mounting screw 64. That is to say, bonding screw 82 could provide the bonded neutral as well as provide the fastening between neutral base S8 and the liner 62.
ln Figure la, I have illustrated a modified embodiment of the neutral bar assembly of Figure l. In the embodiment of Figure la all components corresponding to the components of Figure l are identified by a similar numeral with a prime. Thus, two identical bases 5S and 6b are provided to support the neutral bar 40. The embodiment of Figure la differs from that of Figure l in that the neutral bases S8 and 66 do not require openings to receive the neutral bar 40 4 since this unit is supported on top of the bases in any desirable manner.
Although I have described preferred embodiments of my novel invention, many variations and moditications will now be obvious to those skilled in the art, and I prefer therefore to be limited not by the specific disclosure herein but only by the appended claim.
I claim:
A neutral bar assembly for electrically connecting a plurality of conductors; said neutral bar assembly comprising a irst and a second base of insulating material, a common member, a neutral bar, and a neutral liner interposed between said bases and said common member, a -first and a second member fastening said first and said second bases, respectively, to said common member; each ot said iirst and second bases having a iirst and a second opening therein; said neutral bar having a lirst end supported in the lirst of said openings of said irst base and another end supported in the second of said openings of said second base; said neutral bar comprising a length of conductive material having apertures therein for respectively receiving electrical conductors and means for applying pressure between said electrical conductors and said neutral bar when said conductors are inserted in said apertures; said tirst and second bases having identical constructions and being interchangeable with one another; said iirst member comprising a rotatable screw for electrically connecting said bar to a point of predetermined electric potential; said screw being passed through cooperating apertures in said neutral bar and said tirst base and being terminated in said common member supporting said iirst and second bases.
References Cited in the tile of this patent UNITED STATES PATENTS 2,511,995 Robertson et al June 20, 1950 2,643,363 Robertson et al. lune 23, 1953 2,748,365 Speck May 29, 1956 OTHER REFERENCES Can: Electrical Mfg, November 1954, page 228.
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027534A (en) * 1959-03-17 1962-03-27 Sealectro Corp Plug type electric-circuit selector
US3162718A (en) * 1962-10-15 1964-12-22 Dossert Mfg Corp Junction unit for underground electrical distribution systems
US3423724A (en) * 1966-07-25 1969-01-21 Ite Circuit Breaker Ltd Terminal means
US3668591A (en) * 1970-11-23 1972-06-06 Murray Mfg Corp Bus bar for electric connections
EP0589307A1 (en) * 1992-09-23 1994-03-30 Siemens Aktiengesellschaft Subassembly support with a connection strip with integrated, electrically contacting mechanical fixation
FR2858470A1 (en) * 2003-08-01 2005-02-04 Mecelec Ind Electrical connector for use in airplane, has elongated bar and clamp screwed on bar, and four fastening screws, each screwed in respective threaded hole opened in respective traversal passage
US9007745B1 (en) * 2012-09-12 2015-04-14 Reliance Controls Corporation Configurable electrical load center
CN105940579A (en) * 2014-02-06 2016-09-14 施耐德电气美国股份有限公司 Hybrid neutral plug on bar with distributed pitch
US20170025830A1 (en) * 2013-12-19 2017-01-26 Schneider Electric USA, Inc. Hybrid plug-on/pigtail neutral bar
WO2020185347A1 (en) * 2019-03-13 2020-09-17 Hubbell Incorporated Adjustable neutral bars and adjustable neutral bar assemblies

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511995A (en) * 1948-08-06 1950-06-20 Bulldog Electric Prod Co Panel board
US2643363A (en) * 1948-08-06 1953-06-23 Bulldog Electric Prod Co Panel board neutral bar
US2748365A (en) * 1952-08-30 1956-05-29 Westinghouse Electric Corp Neutral bar assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511995A (en) * 1948-08-06 1950-06-20 Bulldog Electric Prod Co Panel board
US2643363A (en) * 1948-08-06 1953-06-23 Bulldog Electric Prod Co Panel board neutral bar
US2748365A (en) * 1952-08-30 1956-05-29 Westinghouse Electric Corp Neutral bar assembly

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027534A (en) * 1959-03-17 1962-03-27 Sealectro Corp Plug type electric-circuit selector
US3162718A (en) * 1962-10-15 1964-12-22 Dossert Mfg Corp Junction unit for underground electrical distribution systems
US3423724A (en) * 1966-07-25 1969-01-21 Ite Circuit Breaker Ltd Terminal means
US3668591A (en) * 1970-11-23 1972-06-06 Murray Mfg Corp Bus bar for electric connections
EP0589307A1 (en) * 1992-09-23 1994-03-30 Siemens Aktiengesellschaft Subassembly support with a connection strip with integrated, electrically contacting mechanical fixation
FR2858470A1 (en) * 2003-08-01 2005-02-04 Mecelec Ind Electrical connector for use in airplane, has elongated bar and clamp screwed on bar, and four fastening screws, each screwed in respective threaded hole opened in respective traversal passage
US9007745B1 (en) * 2012-09-12 2015-04-14 Reliance Controls Corporation Configurable electrical load center
US20170025830A1 (en) * 2013-12-19 2017-01-26 Schneider Electric USA, Inc. Hybrid plug-on/pigtail neutral bar
US9806502B2 (en) * 2013-12-19 2017-10-31 Schneider Electric USA, Inc. Hybrid plug-on/pigtail neutral bar
CN105940579A (en) * 2014-02-06 2016-09-14 施耐德电气美国股份有限公司 Hybrid neutral plug on bar with distributed pitch
US20170033523A1 (en) * 2014-02-06 2017-02-02 Schneider Electric USA, Inc. Hybrid neutral plug on bar with distributed pitch
US9948043B2 (en) * 2014-02-06 2018-04-17 Schneider Electric USA, Inc. Hybrid neutral plug on bar with distributed pitch
US20180212380A1 (en) * 2014-02-06 2018-07-26 Schneider Electric USA, Inc. Hybrid neutral plug on bar with distributed pitch
US10439341B2 (en) * 2014-02-06 2019-10-08 Schneider Electric USA, Inc. Hybrid neutral plug on bar with distributed pitch
WO2020185347A1 (en) * 2019-03-13 2020-09-17 Hubbell Incorporated Adjustable neutral bars and adjustable neutral bar assemblies
US11183782B2 (en) 2019-03-13 2021-11-23 Hubbell Incorporated Adjustable neutral bars and adjustable neutral bar assemblies

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