US3654590A - Electrical contact devices for high voltage electrical systems - Google Patents

Electrical contact devices for high voltage electrical systems Download PDF

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Publication number
US3654590A
US3654590A US889243A US3654590DA US3654590A US 3654590 A US3654590 A US 3654590A US 889243 A US889243 A US 889243A US 3654590D A US3654590D A US 3654590DA US 3654590 A US3654590 A US 3654590A
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United States
Prior art keywords
socket
pin
contact
sleeve
arc
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Expired - Lifetime
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US889243A
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English (en)
Inventor
Robert R Brown
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AMERACA ESNA CORP
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AMERACA ESNA CORP
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Publication of US3654590A publication Critical patent/US3654590A/en
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Assigned to MANUFACTURERS HANOVER TRUST COMPANY reassignment MANUFACTURERS HANOVER TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERACE CORPORATION
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
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
    • H01H33/77—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor wherein the break is in air at atmospheric pressure

Definitions

  • ROBERT R. BROWN HIS ATTORNEYS ELECTRICAL CONTACT DEVICES FOR HIGH VOLTAGE ELECTRICAL SYSTEMS The present invention relates generally to electrical devices such as switches and connectors for use in high voltage electrical systems and pertains, more specifically, to electrical switches and connector elements which employ arcquenching materials for interrupting an electric arc ordinarily struck during connection and disconnection under high voltage load conditions, and embodying means for accommodating gases generated by the arc so that such connection and disconnection may be accomplished without failure of the switch or connector structure and means for accommodating an arc which will be struck when a connection is made under high voltage short circuit, or fault, conditions.
  • arc-quenching materials in switches or other types of electrical connectors is now well known in the art.
  • arc-quenching material has been utilized in the form ofa tip placed upon the pin and a complementary sleeve placed ahead of the socket such that the tip and the sleeve will accurately guide the pin into contact with the socket while providing arc-quenching material between the pin and the socket as the pin approaches the socket.
  • vents employing vents are illustrated in US. Pat. No. 3,413,592.
  • the use of such vents has been found to be undesirable since a vent will allow the carbonaceous materials as well as other electrically conductive and undesirable materials in the gases to be expelled into the atmosphere where restrike of the electrical circuit is possible, or in some instances, the vents expel gases into the interior of an electrical oil-filled device, such as a transformer, thus contaminating the oil and introducing the possibility of an electrical failure within the transformer.
  • the amount of gas generated by the arc can be greatly reduced by the introduction of a gap of minimum prescribed dimensions between the sleeve of arcquenching material and the socket and by surrounding the gap with a wall of conductive material, preferably in the form of a metallic member.
  • Another object of the invention is to reduce to an absolute minimum the volume of gases created during the closing of contacts in a device as described above under high voltage, short circuit conditions thereby enabling the device, when enclosed, to be enclosed within a container of smallest possible volume, the small size being particularly desirable when used in conjunction with underground distribution systems.
  • a further object of the invention is to provide an electrical contact device of the type described above having a relatively simple construction capable of economical fabrication.
  • an electrical device such as an electrical connector element
  • electrical contact is to be made between at least a first contact and a complementary second contact under high voltage fault conditions by movement of the first contact into engagement with the second contact
  • the guide being spaced longitudinally from the second contact in the direction of movement of the first contact
  • FIG. 1 illustrates complementary electrical connectors with a connector element constructed in accordance with the invention shown in a longitudinal cross-sectional view
  • FIG. 2 is an enlarged fragmentary cross-sectional view of portions of the connectors of FIG. 1 as the connectors are being connected;
  • FIG. 3 is a further enlarged fragmentary cross-sectional view of a portion of FIG. 2.
  • the high voltage cable 10 has a central conductor 14, which is covered with an insulating jacket 16 which, in turn, is sheathed within a conductive shield 18.
  • the cable 10 is terminated within an electrical connector element 20 shown in the form of an elbow having a body 21 which includes an inner member 22 of insulating elastomeric material and an outer member 24 of conductive elastomeric material.
  • a central electrical contact is shown in the form of a pin 26 of conductive metal projecting axially through a receptacle 28 in the body 21 of the connector element 20.
  • a tip 30 of nonconductive plastic arc-quenching material is affixed to the end of the pin 26 for purposes which will be described hereinafter.
  • Bushing 34 is provided with a housing 36, preferably fabricated of an elastomeric material and having an axially projecting outer body portion 38 constructed of a dielectric material, preferably an insulating elastomer.
  • a housing 36 preferably fabricated of an elastomeric material and having an axially projecting outer body portion 38 constructed of a dielectric material, preferably an insulating elastomer.
  • Within the housing 36 is an electrical contact 39 shown in the form of a metallic socket 40 having a plurality of segments 42 which are biased radially inwardly by an annular spring member 44 which encircles segments 42 adjacent the mouth 46 of the socket 40.
  • a sleeve 48 constructed of a plastic arc-quenching material is located ahead of the socket 40 within the housing 36 and has an axially directed cylindrical bore 50 having an inside diameter complementary to the outside diameter of the plastic tip 30 and the pin 26 of the cor responding connector element for receiving and guiding the plastic tip and the pin into proper engagement with the socket as the connector elements 20 and 34 are connected.
  • Both the electrical contact 39 and the plastic sleeve 48 are actually affixed to a first tubular member 52 adjacent one end 53 thereof, the sleeve 48 being affixed to a portion 54 of the tubular member 52 by cooperating screw threads while the contact 39 is affixed to a portion 55 of the tubular member 52 by cooperating bead-like deformations.
  • the first tubular member 52 extends axially to the other end 56 thereof where the tubular member 52 is terminated by a base 58.
  • the base 58 has a threaded aperture 59 so that the bushing 34 may be removably secured to a threaded stud 60 carried by a well member 62 which is permanently secured to the transformer casing 32.
  • the threaded stud 60 is mechanically affixed and electrically connected to a lead 64 of the transformer 12.
  • the first tubular member 52 and the base 58 are electrically conductive and are preferably constructed of metal. The first tubular member 52 and the base 58 thus establish a cavity 66 within the bushing 34.
  • a second tubular member 68 which is actually an integral portion of the electrical contact 39, extends axially into the cavity 66 and has an annular wall 70 spaced radially from the first tubular member 52 and closed off by an end wall 72 secured thereto, thus establishing dividing means for dividing the cavity 66 into a first chamber 74 and a second chamber 76.
  • the first chamber 74 is in open communication with passages 78, established between the segments 42 of the socket 40, and with the interior of the socket, while the second chamber 76 is sealed off from the housing 36 by the first tubular member 52 and the base 58.
  • a plurality of apertures 80 are spaced circumferentially around and extend radially through the annular wall 70 of the second tubular member, and valve means 81 shown in the form of an annular band 82 of elastomeric material normally closes the apertures 80 by virtue of the resilience of the elastomeric material of the band.
  • the annular band 82 is seated within an annular recess 83 in the annular wall 70 so as to be positively retained against axial movement along the second tubular member 68.
  • the plastic tip 30 will cooperate with the plastic sleeve 48 to serve as a pilot or guide for aligning the respective electrical contacts prior to the making of any electrical contact between these contacts and prior to actual engagement of the pin with the socket.
  • the metallic pin 26 will approach the socket and an electric arc may be struck between portions A and B, immediately causing a rapid generation of gases C which could either preclude a full engagement of the connector elements by establishing a back pressure or could cause an explosive failure of the bushing 34.
  • the socket 40 provides an internal path between the arc and the interior of the socket in the form of passages 78, which path is in open communication with the first chamber 74, the gas C can flow into the first chamber and, as the volume available in the first chamber for the gas decreases by virtue of the penetration of the contact pin 26 and tip 30 and the pressure of the gas builds up in the first chamber 74, the annular band 82 will dilate resiliently to allow such pressure to be relieved and the first chamber will be vented through the valve means 81 into the second chamber 76.
  • the cavity 66 provides the volume necessary to relieve the internal pressure which could otherwise build up to an intolerable level so as to permit completion of the connection between the metal pin 26 and the socket 40 before the uncontrolled generation of very large volumes of gas can take place with concomitant deleterious effects.
  • the electric arc is extinguished and no further gases are generated. Completion of the connection enables the axially projecting body portion 38 of the housing 36 to be seated within the receptacle 28 of the complementary connector element 20 to establish a watertight connection.
  • bushing 34 provides an extra measure of pro-' tection against violent explosive failure and flying debris when the housing 36 is constructed of an elastomeric material. Should the volume of gases generated by an electric arc become so great as to cause the bushing to burst, such a failure would merely rupture and tear the elastomeric material and would not tend to throw harmful fragments which could injure persons in the vicinity of the connector.
  • an electric arc may be struck as the metallic pin 26 is withdrawn from the socket 40 and again approaches the position shown in FIG. 2. It is desirable to extinguish this arc as quickly as possible and to restrain any gases which may be generated by the arc so that the arc will cause no damage and ionized gases do not escape and restrike an arc to ground which could injure personnel in the vicinity of the connection.
  • the combination of the first and second chamber 74 and 76, respectively, with valve means 81 between the chambers provides adequate volume for accommodating gases generated upon connection of the complementary connector elements to enable complete connection without back pressure under many high voltage fault conditions and provides a more limited volume upon disconnection of the connector elements under high voltage load conditions to restrain gases generated upon disconnection of the elements under such conditions.
  • the second chamber is of limited volume by virtue of cavity 66 being wholly within the bushing 34, it will be seen that dissipation of enough of the gases entrapped within the second chamber should take place prior to making another connection at load so that any further gases generated during such a subsequent connection can be accommodated.
  • the gases which have been trapped within the second chamber 76 may be allowed to dissipate slowly and preferably back into the first chamber '74 and thence out of the connection by passing through passages 78 between the segments 42 of the socket 40 and the cylindrical bore 50 of the plastic sleeve 48.
  • a plug 88 of porous material such as a porous member of sintered metal, is placed in the end wall 72 to allow slow leakage of gas from the second chamber 76 to the first chamber 74 when the valve provided by the annular elastomeric band 82 is closed over apertures 80.
  • FIG. 3 the construction of the connector element in the form of bushing 34 in the vicinity of the gap 90 is illustrated in a greatly enlarged fragmentary view which shows the pin 26 located at a distance D from the socket 40 as the pin is being advanced into engagement with the socket.
  • the distance D is the maximum distance at which an arc will be struck between the pin and the socket under high voltage alternating current conditions when the pin and socket are unused, i.e., are not contaminated with electrically conductive materials from prior use.
  • the resulting gap 90 apparently provides some volume which can be occupied by the arc and which can immediately accommodate gases generated at the surfaces of the arc-quenching material ofthe sleeve 48 and the tip contacted by the arc.
  • the provision of a gap 90, rather than arc-quenching material, in the vicinity of the arc reduces the amount of arc-quenching material upon which the arc can act to produce gas, thereby reducing somewhat the volume of gas generated.
  • the tubular member 52 which surrounds the gap 90 is exposed to the arc and since the tubular member 52 is electrically connected to the socket at portion 55, the tubular member can act as a contact to help carry current during arcing. Because the tubular member 52 is fabricated of metal, the material of the tubular member will not evaporate as quickly as a plastic arc-quenching material under the influence of an arc. Furthermore, any metal vapor within the gap 99 will tend to condense upon the tubular member 52 since the tubular member is generally cooler than the pin 26, the socket 40, the tip 30 and the sleeve 48. Thus, the tubular member 52 itself, when exposed to the arc through the use of the gap 90, becomes an important component part in the accommodation of the arc.
  • the longitudinal spacing between the end face 92 of the sleeve 48 and the confronting end 94 of the socket 40 should be in the order of magnitude of at least one half the arc-strike distance D.
  • the axial (longitudinal) length L of the gap 90 should be no less than one-half the distance D.
  • the inside diameter of the tubular member 52 at the exposed portion 96 of the wall thereof is such that the exposed portion 96 of the wall of the tubular member is spaced radially from the path of travel of the pin 26, ie, the outside diameter of the pin when the pin is engaged in the socket, a distance sufficient to provide the gap 90 with an annular configuration having a radial (lateral) width W no less than, and preferably slightly greater than, the axial length L of the gap '90. in any event, radial width W should be no less than the order of magnitude of onehalf the arc-strike distance D.
  • electrically conductive material can condense upon the end face 92 of the sleeve 48 and provide an electrical path between the pin 26 and the wall of the tubular member 52 enabling an arc to be struck initially between the pin and the tubular member rather than between the pin and the socket 40 as the pin is advanced toward the socket.
  • a portion 98 of the end face 92 adjacent the tubular member 52 is spaced longitudinally further from the socket 40 than the portion 100 of the end face 92 which is contiguous with the path of travel of the pin 26 by reducing the outside diameter of the sleeve 48 at 102.
  • any path along the end face 92 between the pin 26 and the tubular member 52 will have a greater length than the lateral distance (equal to distance W) between the bore 50 and the tubular member 52.
  • This reduction of the outside diameter of the sleeve at 102 also serves to eliminate more arc-quenching material from the vicinity of the arc occupying the gap thereby further reducing the volume of gas generated by that arc.
  • an electrical device such as an electrical connector element, in which electrical contact is to be made between at least a first contact and a complementary second contact under high voltage fault conditions by movement of the first contact into engagement with the second contact:
  • the longitudinal spacing between the guide and the second contact and the lateral spacing between the wall and the path of travel providing a gap having a longitudinal length no less than the order of magnitude of one-half the distance between the first and second contacts at which an arc will be stmck between the contacts as the first contact approaches the second contact under said high voltage fault conditions and a lateral width no less than the order of magnitude of one-half said arc-strike distance.
  • first contact includes a metallic pin and the second contact includes a metal socket for receiving the pin:
  • said guide includes a sleeve of arc-quenching material for receiving the pin, the sleeve being longitudinally spaced from the socket;
  • said surrounding means includes a metallic tubular member overlapping the sleeve and the socket and spaced laterally from the path of travel of the pin to surround the longitudinal spacing between the sleeve and the socket with said wall;
  • the guiding means include a tip of arc-extinguishing material carried by the pin and receivable within the sleeve.
  • the sleeve includes an end face confronting the socket and spaced longitudinally from the socket, said end face having at least a portion adjacent the tubular member spaced longitudinally further from the socket than the portion of the end face which is contiguous with the path of travel of the pin such that a path along the end face between the pin and the tubular member will have a greater length than the lateral distance between the pin and the tubular member.
  • the sleeve is cylindrical and has an inside diameter complementary to the diameter of the pin and a prescribed outside diameter, said sleeve being spaced axially from the socket;
  • the tubular member is cylindrical and includes first portions having an inside diameter complementary to and overlapping with the outside diameter of the sleeve and the outside diameter of the socket, and a second portion surrounding the axial spacing between the sleeve and the socket and having an inside diameter greater than the diameter of the pin such that the second portion is spaced radially from the outside diameter of the pin when the pin is engaged in the socket;
  • said axial spacing and said radial spacing providing the gap with an annular configuration such that said longitudinal length is axial and said lateral width is radial.
  • the guiding means include a tip of arc-quenching material carried by the pin and receivable within the sleeve 9.
  • the radial width of the gap is at least as great as the axial length thereof.
  • the sleeve includes an end having an end face confronting the socket and spaced axially from the socket, and the outside diameter of the sleeve is reduced adjacent said end such that a portion of the end face adjacent the tubular member is spaced axially further from the socket than the portion of the end face contiguous with the pin when the pin is engaged in the socket.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Insulators (AREA)
  • Cable Accessories (AREA)
US889243A 1969-12-30 1969-12-30 Electrical contact devices for high voltage electrical systems Expired - Lifetime US3654590A (en)

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US88924369A 1969-12-30 1969-12-30

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US889243A Expired - Lifetime US3654590A (en) 1969-12-30 1969-12-30 Electrical contact devices for high voltage electrical systems

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US (1) US3654590A (enrdf_load_stackoverflow)
JP (1) JPS5137439B1 (enrdf_load_stackoverflow)
BE (1) BE759670A (enrdf_load_stackoverflow)
CA (1) CA920247A (enrdf_load_stackoverflow)
DE (1) DE2058670A1 (enrdf_load_stackoverflow)
FR (1) FR2072703A5 (enrdf_load_stackoverflow)
GB (1) GB1332708A (enrdf_load_stackoverflow)
NL (1) NL163381C (enrdf_load_stackoverflow)
SE (1) SE359191B (enrdf_load_stackoverflow)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884542A (en) * 1974-03-14 1975-05-20 Rte Corp Pressure actuated electrical bypass circuit for a high voltage bushing
US3917374A (en) * 1974-08-19 1975-11-04 Kearney National Inc Electric connector apparatus
DE2608955A1 (de) * 1975-03-10 1976-09-30 Amerace Corp Elektrischer verbinder
US3997235A (en) * 1975-03-27 1976-12-14 General Electric Company Shielded power cable separable connector module with snuffer liner having reduced arc-quenching gas generating portion
DE2934706A1 (de) * 1978-08-29 1980-03-13 Amerace Corp Elektrischer verbinder
US20060154507A1 (en) * 2005-01-13 2006-07-13 Cooper Technologies Company Device and method for latching separable insulated connectors
US20060211308A1 (en) * 2005-03-16 2006-09-21 Norbert Schaffner High voltage proof electrical plug and socket connection
EP1782507A4 (en) * 2004-08-25 2007-09-19 Utilx Corp CABLE CONNECTORS WITH INTERNAL FLUID TANKS
US20070293073A1 (en) * 2005-11-14 2007-12-20 Hughes David C Separable loadbreak connector and system
US20080045091A1 (en) * 2005-01-13 2008-02-21 Cooper Technologies Company Device and method for latching separable insulated connectors
US20080192409A1 (en) * 2007-02-13 2008-08-14 Paul Michael Roscizewski Livebreak fuse removal assembly for deadfront electrical apparatus
US20080200053A1 (en) * 2007-02-20 2008-08-21 David Charles Hughes Thermoplastic interface and shield assembly for separable insulated connector system
US20080207022A1 (en) * 2007-02-22 2008-08-28 David Charles Hughes Medium voltage separable insulated energized break connector
US20080220638A1 (en) * 2005-08-08 2008-09-11 David Charles Hughes Apparatus, System and Methods for Deadfront Visible Loadbreak
US20080233786A1 (en) * 2007-03-20 2008-09-25 David Charles Hughes Separable loadbreak connector and system
US20080261465A1 (en) * 2007-04-23 2008-10-23 Cooper Technologies Company Separable Insulated Connector System
US20080259532A1 (en) * 2007-04-23 2008-10-23 Cooper Technologies Company Switchgear Bus Support System and Method
US20090100675A1 (en) * 2007-02-20 2009-04-23 Cooper Technologies Company Method for manufacturing a shield housing for a separable connector
US20090108847A1 (en) * 2007-10-31 2009-04-30 Cooper Technologies Company Fully Insulated Fuse Test and Ground Device
US20090111324A1 (en) * 2007-02-20 2009-04-30 Cooper Technologies Company Shield Housing for a Separable Connector
US7578682B1 (en) 2008-02-25 2009-08-25 Cooper Technologies Company Dual interface separable insulated connector with overmolded faraday cage
US20090215299A1 (en) * 2008-02-27 2009-08-27 Cooper Technologies Company Two-material separable insulated connector
US20090215313A1 (en) * 2008-02-25 2009-08-27 Cooper Technologies Company Separable connector with reduced surface contact
US20090215321A1 (en) * 2008-02-25 2009-08-27 Cooper Technologies Company Push-then-pull operation of a separable connector system
US20090233472A1 (en) * 2008-03-12 2009-09-17 David Charles Hughes Electrical Connector with Fault Closure Lockout
US20090258547A1 (en) * 2008-04-11 2009-10-15 Cooper Technologies Company Extender for a separable insulated connector
US20090255106A1 (en) * 2008-04-11 2009-10-15 Cooper Technologies Company Method of using an extender for a separable insulated connector
US7632120B2 (en) 2005-07-29 2009-12-15 Cooper Technologies Company Separable loadbreak connector and system with shock absorbent fault closure stop
US7661979B2 (en) 2007-06-01 2010-02-16 Cooper Technologies Company Jacket sleeve with grippable tabs for a cable connector
US7670162B2 (en) 2008-02-25 2010-03-02 Cooper Technologies Company Separable connector with interface undercut
US8056226B2 (en) 2008-02-25 2011-11-15 Cooper Technologies Company Method of manufacturing a dual interface separable insulated connector with overmolded faraday cage
WO2012033217A1 (en) * 2010-09-06 2012-03-15 Yazaki Corporation Conductive path structure and wire harness

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2167726B1 (enrdf_load_stackoverflow) * 1972-01-06 1976-05-14 Joy Mfg Co
US3982812A (en) * 1973-10-01 1976-09-28 General Electric Company Power cable separable connector having gasket means for restricting the flow of arc-generated gases therefrom
JPS60252513A (ja) * 1984-05-30 1985-12-13 Tipton Mfg Corp 定量供給装置

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US3323097A (en) * 1964-08-17 1967-05-30 Mc Graw Edison Co Conductor termination with stress distribution means
US3513437A (en) * 1968-01-08 1970-05-19 Gen Electric Arc gas expansion chamber for high voltage termination bushings

Patent Citations (2)

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US3323097A (en) * 1964-08-17 1967-05-30 Mc Graw Edison Co Conductor termination with stress distribution means
US3513437A (en) * 1968-01-08 1970-05-19 Gen Electric Arc gas expansion chamber for high voltage termination bushings

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884542A (en) * 1974-03-14 1975-05-20 Rte Corp Pressure actuated electrical bypass circuit for a high voltage bushing
US3917374A (en) * 1974-08-19 1975-11-04 Kearney National Inc Electric connector apparatus
DE2608955A1 (de) * 1975-03-10 1976-09-30 Amerace Corp Elektrischer verbinder
US3997235A (en) * 1975-03-27 1976-12-14 General Electric Company Shielded power cable separable connector module with snuffer liner having reduced arc-quenching gas generating portion
DE2934706A1 (de) * 1978-08-29 1980-03-13 Amerace Corp Elektrischer verbinder
EP1782507A4 (en) * 2004-08-25 2007-09-19 Utilx Corp CABLE CONNECTORS WITH INTERNAL FLUID TANKS
US7331806B2 (en) 2004-08-25 2008-02-19 Utilx Corporation Cable connectors with internal fluid reservoirs
US7591693B2 (en) 2005-01-13 2009-09-22 Cooper Technologies Company Device and method for latching separable insulated connectors
US20060154507A1 (en) * 2005-01-13 2006-07-13 Cooper Technologies Company Device and method for latching separable insulated connectors
US20080045091A1 (en) * 2005-01-13 2008-02-21 Cooper Technologies Company Device and method for latching separable insulated connectors
US7258585B2 (en) * 2005-01-13 2007-08-21 Cooper Technologies Company Device and method for latching separable insulated connectors
US7241178B2 (en) * 2005-03-16 2007-07-10 Techpointe S.A. High voltage proof electrical plug and socket connection
US20060211308A1 (en) * 2005-03-16 2006-09-21 Norbert Schaffner High voltage proof electrical plug and socket connection
US7632120B2 (en) 2005-07-29 2009-12-15 Cooper Technologies Company Separable loadbreak connector and system with shock absorbent fault closure stop
US20080220638A1 (en) * 2005-08-08 2008-09-11 David Charles Hughes Apparatus, System and Methods for Deadfront Visible Loadbreak
US20110081793A1 (en) * 2005-11-14 2011-04-07 Cooper Technologies Company Separable Electrical Connector with Reduced Risk of Flashover
US20070293073A1 (en) * 2005-11-14 2007-12-20 Hughes David C Separable loadbreak connector and system
US20090081896A1 (en) * 2005-11-14 2009-03-26 Cooper Technologies Company Separable Electrical Connector with Reduced Risk of Flashover
US8038457B2 (en) 2005-11-14 2011-10-18 Cooper Technologies Company Separable electrical connector with reduced risk of flashover
US7901227B2 (en) 2005-11-14 2011-03-08 Cooper Technologies Company Separable electrical connector with reduced risk of flashover
US7572133B2 (en) 2005-11-14 2009-08-11 Cooper Technologies Company Separable loadbreak connector and system
US20080192409A1 (en) * 2007-02-13 2008-08-14 Paul Michael Roscizewski Livebreak fuse removal assembly for deadfront electrical apparatus
US20080200053A1 (en) * 2007-02-20 2008-08-21 David Charles Hughes Thermoplastic interface and shield assembly for separable insulated connector system
US7854620B2 (en) 2007-02-20 2010-12-21 Cooper Technologies Company Shield housing for a separable connector
US7494355B2 (en) 2007-02-20 2009-02-24 Cooper Technologies Company Thermoplastic interface and shield assembly for separable insulated connector system
US20090100675A1 (en) * 2007-02-20 2009-04-23 Cooper Technologies Company Method for manufacturing a shield housing for a separable connector
US20090111324A1 (en) * 2007-02-20 2009-04-30 Cooper Technologies Company Shield Housing for a Separable Connector
US7950939B2 (en) 2007-02-22 2011-05-31 Cooper Technologies Company Medium voltage separable insulated energized break connector
US20080207022A1 (en) * 2007-02-22 2008-08-28 David Charles Hughes Medium voltage separable insulated energized break connector
US7862354B2 (en) 2007-03-20 2011-01-04 Cooper Technologies Company Separable loadbreak connector and system for reducing damage due to fault closure
US20080233786A1 (en) * 2007-03-20 2008-09-25 David Charles Hughes Separable loadbreak connector and system
US7666012B2 (en) 2007-03-20 2010-02-23 Cooper Technologies Company Separable loadbreak connector for making or breaking an energized connection in a power distribution network
US7633741B2 (en) 2007-04-23 2009-12-15 Cooper Technologies Company Switchgear bus support system and method
US7568927B2 (en) 2007-04-23 2009-08-04 Cooper Technologies Company Separable insulated connector system
US20080259532A1 (en) * 2007-04-23 2008-10-23 Cooper Technologies Company Switchgear Bus Support System and Method
US20080261465A1 (en) * 2007-04-23 2008-10-23 Cooper Technologies Company Separable Insulated Connector System
US7883356B2 (en) 2007-06-01 2011-02-08 Cooper Technologies Company Jacket sleeve with grippable tabs for a cable connector
US7661979B2 (en) 2007-06-01 2010-02-16 Cooper Technologies Company Jacket sleeve with grippable tabs for a cable connector
US7909635B2 (en) 2007-06-01 2011-03-22 Cooper Technologies Company Jacket sleeve with grippable tabs for a cable connector
US20100240245A1 (en) * 2007-06-01 2010-09-23 Cooper Technologies Company Jacket Sleeve with Grippable Tabs for a Cable Connector
US7695291B2 (en) 2007-10-31 2010-04-13 Cooper Technologies Company Fully insulated fuse test and ground device
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Also Published As

Publication number Publication date
GB1332708A (en) 1973-10-03
FR2072703A5 (enrdf_load_stackoverflow) 1971-09-24
CA920247A (en) 1973-01-30
SE359191B (enrdf_load_stackoverflow) 1973-08-20
NL163381C (nl) 1980-08-15
JPS5137439B1 (enrdf_load_stackoverflow) 1976-10-15
DE2058670A1 (de) 1971-07-01
BE759670A (fr) 1971-04-30
NL7017458A (enrdf_load_stackoverflow) 1971-07-02
NL163381B (nl) 1980-03-17

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