CA2022949C - 600-amp hot stick-operable screw and pin-and-socket assembled connector system - Google Patents
600-amp hot stick-operable screw and pin-and-socket assembled connector systemInfo
- Publication number
- CA2022949C CA2022949C CA002022949A CA2022949A CA2022949C CA 2022949 C CA2022949 C CA 2022949C CA 002022949 A CA002022949 A CA 002022949A CA 2022949 A CA2022949 A CA 2022949A CA 2022949 C CA2022949 C CA 2022949C
- Authority
- CA
- Canada
- Prior art keywords
- socket
- pin
- bushing
- screw
- link member
- 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
Links
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000004606 Fillers/Extenders Substances 0.000 abstract description 28
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 3
- 239000013536 elastomeric material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000228957 Ferula foetida Species 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002226 simultaneous effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S439/00—Electrical connectors
- Y10S439/921—Transformer bushing type or high voltage underground connector
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
PIN-AND-SOCKET ASSEMBLED CONNECTOR SYSTEM
ABSTRACT OF THE DISCLOSURE
A high voltage cable is fixed to the single leg of a 600-Amp "T" connector having a first of its cross bar arms mounted upon an insulating bushing fixed to a wall of the apparatus housing it is to serve. Spaced apart from such insulating bushing and mounted upon the same wall is an apparatus bushing to which is connected a bushing extender. An "h" shaped link member is employed to couple the cable via the other of its "T" connector cross bar arms to the apparatus bushing via the bushing extender. One of the short arms of the link member contains a pin/socket arrangement to make an electrical connection with the cable. The remaining short arm contains a screw-operated member operated by a tool inserted through the single long arm to make and break electrical and mechanical connections between the link member and the bushing extender. When removed, the link member not only interrupts the circuit but provides a visual indication thereof.
ABSTRACT OF THE DISCLOSURE
A high voltage cable is fixed to the single leg of a 600-Amp "T" connector having a first of its cross bar arms mounted upon an insulating bushing fixed to a wall of the apparatus housing it is to serve. Spaced apart from such insulating bushing and mounted upon the same wall is an apparatus bushing to which is connected a bushing extender. An "h" shaped link member is employed to couple the cable via the other of its "T" connector cross bar arms to the apparatus bushing via the bushing extender. One of the short arms of the link member contains a pin/socket arrangement to make an electrical connection with the cable. The remaining short arm contains a screw-operated member operated by a tool inserted through the single long arm to make and break electrical and mechanical connections between the link member and the bushing extender. When removed, the link member not only interrupts the circuit but provides a visual indication thereof.
Description
2~22~9 PIN-AND-SOCKET ASSEMBLED CONNECTOR SYSTEM
CROSS-REFERENCE TO RELATED APPLICATION
Application for Canadian Letters Patent File No.
2,003,844 filed November 24, 1989, entitled "600-Amp Hot Stick-Operable Pin-And-Socket Assembled Connector System"
by Glenn J. Luzzi and James E. Cole, and assigned to the Assignee of the instant application.
BACKGROUND OF THE INVENTION
Field of the Invention:
The invention is directed to the field of high voltage separsble connector ~ystems snd more psrticularly to a 600-Amp stick-operable connector system used to inter-engsge sn electricsl appsrstus with a hi8h voltsge csble.
Description of the Prior Art:
Proper msintenance procedures in high-voltsge systems involving trsnsformers or switcbes and cable systems require that the system be de-energized and isolated by opening the switches at both ends of the csble run.
The csble system is then tested to ascertbin thst it is actuslly de-energized snd then each phase is grounded .. ,'' " $
., , ' , -2~22~49 at both end~ to prevent in~ury ~hould the cable system ! become accidentally energized. Finally, the cables are . ....
removed from the 8~Wi tch or trsnsformer bushings to achleve a visible break between the cables and their respective ~, 5 bushings.
A far simpler method for connecting and disconnecting transformers and switches with cable systems which did not require the physical movement of the 600-Amp cable to a parking station remote from its usual position and which still gave the required vlsufll break and which facilitated the testing and grounding of each pha6e was shown, described and claimed in U.S. Patent No. 4,799,895, issued January 24, 1989, entitled 600-Amp Hot Stick-Operable Screw-Assembled Connector System by Alan, D. Borgstrom and assigned to the Assignee of the instant invention and the disclosure of same may be referred to for further details. The device of that patent uses a contact extender in each of its "T" shaped cable connectors and in the assembly of the bushing extender to the apparatus bushing into which the threaded studs of the link member are screwed to assemble the link member wlth the cable connector and bushing extender.
Despite great care in the design to insure that all components are aligned before the link member bolts are extended and threadably engaged with the contact extenders, : ~ - 2 -., ~ .
21~22949 . . .
some users fenr that the link member bolt~ snd contact extenders can be cross threaded thereby preventing proper coupling and uncoupling of the link member with the cable ~ and apparstus bushing.
-~ 5 An alternative conQtruction to that of the above-cited patent, which preaerves all of its highly desirable quali-tie~ while substituting a pin-and-socket coupling arrange-~ ment for the screw-operated features of the patent is s shown, described and claimed in the above-identified patent spplicstion file No. 2,003,844 filed November 24, 1989 . and reference may be had to such application laid open as of September 29, 1990 for further details thereof. An external, link-operating assembly is provided to insure proper assembly snd dissssembly oP the link member from the cable connector snd sppsrstus bushing sssembly. In addition, the link-operating a~sembly hold~ the link member, the cable con-nector snd spparatus bushing sssembly together whlch removes sny requlrement that the pin-and-socket components sssemble or hold in assembly these elemente.
The dr~wbsck of this alternstlve system is the requirement of the external, link-operating assembly which is large, bulky, expensive snd requires a ~rest deal of space for operation.
.'~
,.'~ .
.
:, :. ' .
' .. . .
2~22'~
SUMMARY OF THE INVENTION
The present invention overcomes the difficulties noted above with respect to prior art 600-Amp stick-operable connector systems by providing an easily movable link member screw-operable to selectively engage either a fixed 600-Amp high voltage cable, with connector attached, or the bushing of an electrical apparatus and a pin-and-socket combination to electrically couple the other.
The invention in a broadly claimed aspect provides a high voltage hot stick-operable screw and pin-and-socket a~sembled connector system for selectively coupling together a source of high voltage and a high voltage cable comprising a support member, an apparatus bushing mounted upon the support member and electrically coupled to a source of high voltage and a high voltage cable coupled to a connector mounted upon the support member. A selectively applicable pin-and-socket screw-operated link member when applied in a first arrangement joins the apparatus bushing to the cable to apply high voltage thereto or, when not applied between the apparatus bushing and the cable, provides a visible separation between the bushing and the cable. The pin-and-socket, screw-operated link member comprises a first and a second housing assembly, one of the first and second housing assemblies containing a socket to mate with a pin in the apparatus bushing or the cable connector and the other assembly containing a screw-operated member to mate with the other of the apparatus bushing or the cable connector. A conductive metallic buss couples the socket and the screw-operated member for electrically coupling same and a third housing assembly provides access to the screw-operated member for selectively applying the link member in the first arrangement and for withdrawing the link member from such arrangement.
More particularly, the link member is made up of one 600 Ampere 30 ~ to 200 Ampere loadbreak reducing tap plug and one 600 Ampere plug 2~9~9 interface joined by an internal buss bar suitably insulated. In the bore of the loadbreak reducing tap is placed a bolt with an enlarged head and a socket which can be controlled by a suitable tool inserted into the socket through the loadbreak mechanism. The bolt is retained in the bore and is limited in its travel so that when it is advanced it bears against an annular shoulder of the bore and causes the link member to be mechanically and electrically joined with either of the cable or bushing. When the bolt is withdrawn, it bears against an annular retaining ring in the bore and separates the link member.
The pin-and-socket combination are mated and separated as the bolt is advanced or withdrawn and provides electrical connection only.
Accordingly this invention seeks to provide a novel screw-. operated interconnect system between a high voltage cable and an electrical apparatus using both a pin-and-socket and screw-operated member to establish electrical continuity.
Further this invention seeks to provide a novel interconnect system between a high voltage cable and an electrical apparatus where a screw-operated member mechanically interconnects the interconnect system and electrically interconnects or disconnects itself and a separate pin-and-socket connector.
Still further this invention seeks to provide a novel interconnect system between a high voltage cable and an electrical apparatu~ using a movable bolt restrained within the interconnect system.
Other aspects and features of the invention will be pointed out in the following description and claims and illustrated in the !~ accompanying drawings which disclose, by way of example, the principles of the invention and the best mode which has been contemplated for carrying it out.
'!i ~ 5 2~2?.~'~9 `;
BRIEF_DESCRIPTION OF THE DRAWING
In the drawings in which similar elements are given similar reference characters:
Fig. 1 is A fragmentary, side elevation, partially in ~ection, showing a completed interconnect between a high volt~ge cable connected to a "T" shaped connector and an apparatus bushing employing a bushing extender, contact extenders and link assembly according to prior art practices and is Fig. lO of U. S. Pat. No. 4,799,895 issued January 24, 1989 with the addition of some reference characters shown in the drswings of that patent.
Fig. 2 is a front perfipective view of a completed interconnect between a high voltage cable connected to a "T" shaped connector, an apparatus bushing extender, support bracket and operating link assembly according to prior art practices flnd is Fig. 2 of the above-identi-; fied application.
Fig. 3 i~ a fragmentary slde elevational view, partially in section, of ~n apparatus bushing, appar~tus bu~hing extender, high voltage cable connected to a "T"
shaped connector and interconnecting link, prior to ~inal assembly, with the operating link assembly omitted and is Fig. 7 of the above-identlfied application.
Fig. 4 is a fragmentary side elevation, partly in section, of a fully-engaged alternate pin-and-socket arrange-ment and is Fig. 6 of the above-identified application.
2~?~%'~
Fig. 5 1~ a fragmentsry side elevational view, p~rtially in section, of sn apparatu~ bushing, apparatu~
bushing extender, high voltage cable connected to a "T"
shaped connector and an interconnecting link member con~tructed in accordance with the concepts of the invention just prior to a~sembly.
Fig. 6 i9 the device of Fig. 5 fully assembled.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Turning to Fig. 1, there is shown a fully screw-operated link member 200 acco~ding to the above-identified patent. Each assembly 230 has a bolt 254 positioned in a bore with a threaded end portion 258 and a head portion 256 containing a socket 268 which can accept a tool inserted through the open end of assembly 230.
A shoulder 264 18 engaged by leading surface of head portion 256 to pull link member 200 into place as thread~
258 engage internally-threaded recess 296 of contact extender 290. No rear restraint for the bolts 254 are placed in the bores of the a~semblies 230 since the bolts 254 must be free to move clear of the contact extenders 290 ~o that there i8 no premature en8agement between threads 258 of the bolts and 296 of contact extender 290 which could cause them to jam or cross thread while 2~?.~
., , one of the bolts 254 i8 being torqued up. The absence of any rear shoulder or rear re~traint for the bolt 254 makes removal of link 200 more difficult since both interfaces must be removed simultaneou~ly.
One approach to eliminating the potential problem~
of jamming or cross threading of the bolts 254 while employing the advantages of link member 200 is shown in Figs. 2, 3 and 4 as more fully described in the above-identified application. Instead of the internally-threaded contact extenders 290, a plug 215 with a cylindrical contact portion 218 is employed. The externally threaded portion 216 serves to unite the parts in the same manner as the contact extenders 290. Link member 152' has in each of its legs 154 and 156 a socket 217 with one or more louvered rings 222 to make electrical contact between the walls of socket 217 and contact portion 218 of plug 215 as iB illustrated in Fig. 3.
An alternative pin-and-socket arrangement is shown in Fig. 4 where plug 34 has a se8mented bulbous end 40 for receipt within the smooth-walled sockets 212 of arms 154 and 156 of link member 152.
Assembly of the link member 152' to the bushing extender 26 and the "T" shaped connector 50 is shown in Fig. 2 and is accomplished by link operating system 134. A pushing arm 144 advances link 152'as operating ~2~
hflndle 136 is rotated toward "T" shaped connector 50 about pivot pins 146 advancing the 810t 140 along roller sleeve 130 mounted on pin 132 on member 120. The link 152' is separated by the opposite movememt of operating handle 136. In the position shown in Fig. 2, the arms 154 and 156 are fully sested as sre the various pin-and-socket combinations and the link 152' is firmly held in position. When the operating handle 136 is moved to the fully horizontal position, the arms 154 and 156 are withdrawn and the pin-and-socket connections are broken and the link 152' can b,e fully removed.
As above mentioned, the link operating system 134 is large and bulky requiring not only the system 134 but also the bracket 72 and the members 120. It also requires a great deal of space and large open-front space so that the operating handle 136 can be rotated. It does offer a small reduction in the size of the link 152' since only one arm 158 is required. A single arm 158 with loadbreak facility is sufficient to test the hi8h volt~ge cable and the bushing and there is no need for access to the second end of the link 152'.
Turning now to Fig~. 4, 5 and 6, a link 300 con-structed in accordance with the concepts of the invention 9 _ 2 ~ `~. ?J ~
i8 shown. A high voltage cable iB ~oined to a "T" shaped connector 50 by means of crimp connector 66 whose threadèd aperture 68 receives the threaded end 36 of plug 215 which i8 further threaded into insulating bushing 302 fastened to apparstus wall 22 and received in arm 56 of "T" shaped connector 50. The contact portion 218 Of plug 215 extends into the receptacle 304 of arm 54 of connector 50.
Apparatus bushing 20 iB fixed to apparatus wall 22 and receives apparatus bushing extender 26 which is fixed to it by the threaded portion 292 of contact extender 290.
Internally threaded portion 296 of contact extender 290 extends into receptacle 308 of bushing extender 26.
Libk 300 i~ similar to link 152' of Fig. 3. A central body 152 of in~ulating elastomeric material 202 has molded to it at selected locations a layer of conductive elasto-meric material 204. From central body portion 152, pro-~ects a frusto-conically shaped leg 158 which contain~
a centtal metal tube 206 through which tools may be inserted (not shown) to assemble and disassemble the link 300, as will be described below, and to test the high voltage cable and apparatus. Extending from the opposite face of central body 152 are a pair of frusto-conically shaped legs 154' and 156. Leg 156 also - ~ .
2 ~ Js ~
contains a metallic tube 208 ~oined to the tube 206 by a buss bar 210 housed in central body portion 152.
Placed in suitable recesses in the interior surface 217 of tube 208 are a pair of louvered contact rings 222 of the type fully disclosed in U.S. Patent No. 4,186,985 issued February 5, 1980, entitled Electrical Connector, by Frsnk M. Stepniak and Andrew A. Kominiak and assigned to the Assignee of the instant invention. When leg 156 is fully seated in receptacle 304 in arm 54, contact portion 218 of plug 215 will be positioned in the end of tube 208 and within the contact ring~ 222 which will i~
~ make electrical contact between contact portion 218 and 3 tube 208 as i8 shown in Fig. 6.
The bore through tube 206 is enlarged at its end, as at 306 for clearance and at 310 to provide a drive shoulder 264 engaged by the leading edge of head 256 i of bolt 254 to pull leg 154' forward to seat in receptacle 308 of bushing extender 26 and at the same time leg 156 seats in receptacle 304 of arm 54, as shown in Fig. 6.
An annular rece~s 312 behind the trailing surfsce of head 256 of bolt 254 receives an annular retaining rlng 314 to effectively capture bolt 254 and limit its travel within the bore of tube 206. When bolt 254 is moved to the left of Fig. 5, the trailing surface of head 256 , . . . ~ . . .
.~ , . , 2 ~
of bolt 254 bears again~t retalning ring 314 separating arm 154' from receptacle 308 of bushing extender 26 and leg 156 from receptacle 304 of arm 54 of "T" shaped con-nector 50.
In applying the link 300, it i8 grasped by a hot stick (not shown) and positioned 80 that leg 154' enters receptacle 308 of bushing extender ~6 and leg 156 enters receptacle 304 of arm 54 of connector 50 as is shown in Fig. 5. A tool of the typ,e shown in U.S. Patent No.
CROSS-REFERENCE TO RELATED APPLICATION
Application for Canadian Letters Patent File No.
2,003,844 filed November 24, 1989, entitled "600-Amp Hot Stick-Operable Pin-And-Socket Assembled Connector System"
by Glenn J. Luzzi and James E. Cole, and assigned to the Assignee of the instant application.
BACKGROUND OF THE INVENTION
Field of the Invention:
The invention is directed to the field of high voltage separsble connector ~ystems snd more psrticularly to a 600-Amp stick-operable connector system used to inter-engsge sn electricsl appsrstus with a hi8h voltsge csble.
Description of the Prior Art:
Proper msintenance procedures in high-voltsge systems involving trsnsformers or switcbes and cable systems require that the system be de-energized and isolated by opening the switches at both ends of the csble run.
The csble system is then tested to ascertbin thst it is actuslly de-energized snd then each phase is grounded .. ,'' " $
., , ' , -2~22~49 at both end~ to prevent in~ury ~hould the cable system ! become accidentally energized. Finally, the cables are . ....
removed from the 8~Wi tch or trsnsformer bushings to achleve a visible break between the cables and their respective ~, 5 bushings.
A far simpler method for connecting and disconnecting transformers and switches with cable systems which did not require the physical movement of the 600-Amp cable to a parking station remote from its usual position and which still gave the required vlsufll break and which facilitated the testing and grounding of each pha6e was shown, described and claimed in U.S. Patent No. 4,799,895, issued January 24, 1989, entitled 600-Amp Hot Stick-Operable Screw-Assembled Connector System by Alan, D. Borgstrom and assigned to the Assignee of the instant invention and the disclosure of same may be referred to for further details. The device of that patent uses a contact extender in each of its "T" shaped cable connectors and in the assembly of the bushing extender to the apparatus bushing into which the threaded studs of the link member are screwed to assemble the link member wlth the cable connector and bushing extender.
Despite great care in the design to insure that all components are aligned before the link member bolts are extended and threadably engaged with the contact extenders, : ~ - 2 -., ~ .
21~22949 . . .
some users fenr that the link member bolt~ snd contact extenders can be cross threaded thereby preventing proper coupling and uncoupling of the link member with the cable ~ and apparstus bushing.
-~ 5 An alternative conQtruction to that of the above-cited patent, which preaerves all of its highly desirable quali-tie~ while substituting a pin-and-socket coupling arrange-~ ment for the screw-operated features of the patent is s shown, described and claimed in the above-identified patent spplicstion file No. 2,003,844 filed November 24, 1989 . and reference may be had to such application laid open as of September 29, 1990 for further details thereof. An external, link-operating assembly is provided to insure proper assembly snd dissssembly oP the link member from the cable connector snd sppsrstus bushing sssembly. In addition, the link-operating a~sembly hold~ the link member, the cable con-nector snd spparatus bushing sssembly together whlch removes sny requlrement that the pin-and-socket components sssemble or hold in assembly these elemente.
The dr~wbsck of this alternstlve system is the requirement of the external, link-operating assembly which is large, bulky, expensive snd requires a ~rest deal of space for operation.
.'~
,.'~ .
.
:, :. ' .
' .. . .
2~22'~
SUMMARY OF THE INVENTION
The present invention overcomes the difficulties noted above with respect to prior art 600-Amp stick-operable connector systems by providing an easily movable link member screw-operable to selectively engage either a fixed 600-Amp high voltage cable, with connector attached, or the bushing of an electrical apparatus and a pin-and-socket combination to electrically couple the other.
The invention in a broadly claimed aspect provides a high voltage hot stick-operable screw and pin-and-socket a~sembled connector system for selectively coupling together a source of high voltage and a high voltage cable comprising a support member, an apparatus bushing mounted upon the support member and electrically coupled to a source of high voltage and a high voltage cable coupled to a connector mounted upon the support member. A selectively applicable pin-and-socket screw-operated link member when applied in a first arrangement joins the apparatus bushing to the cable to apply high voltage thereto or, when not applied between the apparatus bushing and the cable, provides a visible separation between the bushing and the cable. The pin-and-socket, screw-operated link member comprises a first and a second housing assembly, one of the first and second housing assemblies containing a socket to mate with a pin in the apparatus bushing or the cable connector and the other assembly containing a screw-operated member to mate with the other of the apparatus bushing or the cable connector. A conductive metallic buss couples the socket and the screw-operated member for electrically coupling same and a third housing assembly provides access to the screw-operated member for selectively applying the link member in the first arrangement and for withdrawing the link member from such arrangement.
More particularly, the link member is made up of one 600 Ampere 30 ~ to 200 Ampere loadbreak reducing tap plug and one 600 Ampere plug 2~9~9 interface joined by an internal buss bar suitably insulated. In the bore of the loadbreak reducing tap is placed a bolt with an enlarged head and a socket which can be controlled by a suitable tool inserted into the socket through the loadbreak mechanism. The bolt is retained in the bore and is limited in its travel so that when it is advanced it bears against an annular shoulder of the bore and causes the link member to be mechanically and electrically joined with either of the cable or bushing. When the bolt is withdrawn, it bears against an annular retaining ring in the bore and separates the link member.
The pin-and-socket combination are mated and separated as the bolt is advanced or withdrawn and provides electrical connection only.
Accordingly this invention seeks to provide a novel screw-. operated interconnect system between a high voltage cable and an electrical apparatus using both a pin-and-socket and screw-operated member to establish electrical continuity.
Further this invention seeks to provide a novel interconnect system between a high voltage cable and an electrical apparatus where a screw-operated member mechanically interconnects the interconnect system and electrically interconnects or disconnects itself and a separate pin-and-socket connector.
Still further this invention seeks to provide a novel interconnect system between a high voltage cable and an electrical apparatu~ using a movable bolt restrained within the interconnect system.
Other aspects and features of the invention will be pointed out in the following description and claims and illustrated in the !~ accompanying drawings which disclose, by way of example, the principles of the invention and the best mode which has been contemplated for carrying it out.
'!i ~ 5 2~2?.~'~9 `;
BRIEF_DESCRIPTION OF THE DRAWING
In the drawings in which similar elements are given similar reference characters:
Fig. 1 is A fragmentary, side elevation, partially in ~ection, showing a completed interconnect between a high volt~ge cable connected to a "T" shaped connector and an apparatus bushing employing a bushing extender, contact extenders and link assembly according to prior art practices and is Fig. lO of U. S. Pat. No. 4,799,895 issued January 24, 1989 with the addition of some reference characters shown in the drswings of that patent.
Fig. 2 is a front perfipective view of a completed interconnect between a high voltage cable connected to a "T" shaped connector, an apparatus bushing extender, support bracket and operating link assembly according to prior art practices flnd is Fig. 2 of the above-identi-; fied application.
Fig. 3 i~ a fragmentary slde elevational view, partially in section, of ~n apparatus bushing, appar~tus bu~hing extender, high voltage cable connected to a "T"
shaped connector and interconnecting link, prior to ~inal assembly, with the operating link assembly omitted and is Fig. 7 of the above-identlfied application.
Fig. 4 is a fragmentary side elevation, partly in section, of a fully-engaged alternate pin-and-socket arrange-ment and is Fig. 6 of the above-identified application.
2~?~%'~
Fig. 5 1~ a fragmentsry side elevational view, p~rtially in section, of sn apparatu~ bushing, apparatu~
bushing extender, high voltage cable connected to a "T"
shaped connector and an interconnecting link member con~tructed in accordance with the concepts of the invention just prior to a~sembly.
Fig. 6 i9 the device of Fig. 5 fully assembled.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Turning to Fig. 1, there is shown a fully screw-operated link member 200 acco~ding to the above-identified patent. Each assembly 230 has a bolt 254 positioned in a bore with a threaded end portion 258 and a head portion 256 containing a socket 268 which can accept a tool inserted through the open end of assembly 230.
A shoulder 264 18 engaged by leading surface of head portion 256 to pull link member 200 into place as thread~
258 engage internally-threaded recess 296 of contact extender 290. No rear restraint for the bolts 254 are placed in the bores of the a~semblies 230 since the bolts 254 must be free to move clear of the contact extenders 290 ~o that there i8 no premature en8agement between threads 258 of the bolts and 296 of contact extender 290 which could cause them to jam or cross thread while 2~?.~
., , one of the bolts 254 i8 being torqued up. The absence of any rear shoulder or rear re~traint for the bolt 254 makes removal of link 200 more difficult since both interfaces must be removed simultaneou~ly.
One approach to eliminating the potential problem~
of jamming or cross threading of the bolts 254 while employing the advantages of link member 200 is shown in Figs. 2, 3 and 4 as more fully described in the above-identified application. Instead of the internally-threaded contact extenders 290, a plug 215 with a cylindrical contact portion 218 is employed. The externally threaded portion 216 serves to unite the parts in the same manner as the contact extenders 290. Link member 152' has in each of its legs 154 and 156 a socket 217 with one or more louvered rings 222 to make electrical contact between the walls of socket 217 and contact portion 218 of plug 215 as iB illustrated in Fig. 3.
An alternative pin-and-socket arrangement is shown in Fig. 4 where plug 34 has a se8mented bulbous end 40 for receipt within the smooth-walled sockets 212 of arms 154 and 156 of link member 152.
Assembly of the link member 152' to the bushing extender 26 and the "T" shaped connector 50 is shown in Fig. 2 and is accomplished by link operating system 134. A pushing arm 144 advances link 152'as operating ~2~
hflndle 136 is rotated toward "T" shaped connector 50 about pivot pins 146 advancing the 810t 140 along roller sleeve 130 mounted on pin 132 on member 120. The link 152' is separated by the opposite movememt of operating handle 136. In the position shown in Fig. 2, the arms 154 and 156 are fully sested as sre the various pin-and-socket combinations and the link 152' is firmly held in position. When the operating handle 136 is moved to the fully horizontal position, the arms 154 and 156 are withdrawn and the pin-and-socket connections are broken and the link 152' can b,e fully removed.
As above mentioned, the link operating system 134 is large and bulky requiring not only the system 134 but also the bracket 72 and the members 120. It also requires a great deal of space and large open-front space so that the operating handle 136 can be rotated. It does offer a small reduction in the size of the link 152' since only one arm 158 is required. A single arm 158 with loadbreak facility is sufficient to test the hi8h volt~ge cable and the bushing and there is no need for access to the second end of the link 152'.
Turning now to Fig~. 4, 5 and 6, a link 300 con-structed in accordance with the concepts of the invention 9 _ 2 ~ `~. ?J ~
i8 shown. A high voltage cable iB ~oined to a "T" shaped connector 50 by means of crimp connector 66 whose threadèd aperture 68 receives the threaded end 36 of plug 215 which i8 further threaded into insulating bushing 302 fastened to apparstus wall 22 and received in arm 56 of "T" shaped connector 50. The contact portion 218 Of plug 215 extends into the receptacle 304 of arm 54 of connector 50.
Apparatus bushing 20 iB fixed to apparatus wall 22 and receives apparatus bushing extender 26 which is fixed to it by the threaded portion 292 of contact extender 290.
Internally threaded portion 296 of contact extender 290 extends into receptacle 308 of bushing extender 26.
Libk 300 i~ similar to link 152' of Fig. 3. A central body 152 of in~ulating elastomeric material 202 has molded to it at selected locations a layer of conductive elasto-meric material 204. From central body portion 152, pro-~ects a frusto-conically shaped leg 158 which contain~
a centtal metal tube 206 through which tools may be inserted (not shown) to assemble and disassemble the link 300, as will be described below, and to test the high voltage cable and apparatus. Extending from the opposite face of central body 152 are a pair of frusto-conically shaped legs 154' and 156. Leg 156 also - ~ .
2 ~ Js ~
contains a metallic tube 208 ~oined to the tube 206 by a buss bar 210 housed in central body portion 152.
Placed in suitable recesses in the interior surface 217 of tube 208 are a pair of louvered contact rings 222 of the type fully disclosed in U.S. Patent No. 4,186,985 issued February 5, 1980, entitled Electrical Connector, by Frsnk M. Stepniak and Andrew A. Kominiak and assigned to the Assignee of the instant invention. When leg 156 is fully seated in receptacle 304 in arm 54, contact portion 218 of plug 215 will be positioned in the end of tube 208 and within the contact ring~ 222 which will i~
~ make electrical contact between contact portion 218 and 3 tube 208 as i8 shown in Fig. 6.
The bore through tube 206 is enlarged at its end, as at 306 for clearance and at 310 to provide a drive shoulder 264 engaged by the leading edge of head 256 i of bolt 254 to pull leg 154' forward to seat in receptacle 308 of bushing extender 26 and at the same time leg 156 seats in receptacle 304 of arm 54, as shown in Fig. 6.
An annular rece~s 312 behind the trailing surfsce of head 256 of bolt 254 receives an annular retaining rlng 314 to effectively capture bolt 254 and limit its travel within the bore of tube 206. When bolt 254 is moved to the left of Fig. 5, the trailing surface of head 256 , . . . ~ . . .
.~ , . , 2 ~
of bolt 254 bears again~t retalning ring 314 separating arm 154' from receptacle 308 of bushing extender 26 and leg 156 from receptacle 304 of arm 54 of "T" shaped con-nector 50.
In applying the link 300, it i8 grasped by a hot stick (not shown) and positioned 80 that leg 154' enters receptacle 308 of bushing extender ~6 and leg 156 enters receptacle 304 of arm 54 of connector 50 as is shown in Fig. 5. A tool of the typ,e shown in U.S. Patent No.
4,202,591 issued May 13, 1980, and assi8ned to the Assignee of the instant invention, is inserted through arm 158, tube 206 and into socket 268 in the bolt 254. Link 300 may be pushed further to the right of Fig. 5 and the bolt 254 turned 80 as to enter the internally threaded portion 296 of contact extender 290. As bolt 254 is tightened and acts upon drive shoulder 264, leg 154' is seated more tightly in receptacle 308 of extender 26, leg 156 is seated more tightly in receptacle 304 of srm 54 and contact portion 218 of plug 215 enters more deeply into the end of tube 208 until all components are fully seated as shown in Fig. 6. Because bolt 254 i~ only advanced once leg 154' is seated, there is little ,.~ ... .
?~
chance of jamming or cross threading. Further, the pin-and-socket arrangement of contact portion 218 with rings 222 only engage as bolt 254 is tightened and do not affect bolt 254.
S To remove the link 300, bolt 254 is turned in the loosening direction until the trailing surface of head 256 engages retaining ring 314 after which the continued turning of bolt 254 exerts a positive force upon ring 314 causing separation of leg 154' from receptacle 308 and leg 156 from receptacle 304 and the separation of . contact portion 218 from rings 222.
In place of the pin-and-socket arrangement of Fig. 5, the pin-and-socket arrangement of Fig. 4 could be used.
The end of tube 208 could be left with a smooth interior lS surface 212 and the contact portion 218 of plug 215 could be replàced by a segmented bulbous end 40 of a plug 34.
A ring (not shown) could be placed at the mouth of tube 208 to prevent unwanted withdrawl of plug 34. The operation of this embodiment would be the same as described above with respect to Figs. 5 and 6.
While there have been shown and described and pointed out the fundamental novel features of the invention as applied to the preferred embodiments, it will be understood that various omissions and substitutions and changes 2~22~
.
of the form and detail~ of the devices illu~trated and < in their operation may be made by tho~e ~killed in the ~ art without departing from the spirlt of the invention.
i . , ~
?~
chance of jamming or cross threading. Further, the pin-and-socket arrangement of contact portion 218 with rings 222 only engage as bolt 254 is tightened and do not affect bolt 254.
S To remove the link 300, bolt 254 is turned in the loosening direction until the trailing surface of head 256 engages retaining ring 314 after which the continued turning of bolt 254 exerts a positive force upon ring 314 causing separation of leg 154' from receptacle 308 and leg 156 from receptacle 304 and the separation of . contact portion 218 from rings 222.
In place of the pin-and-socket arrangement of Fig. 5, the pin-and-socket arrangement of Fig. 4 could be used.
The end of tube 208 could be left with a smooth interior lS surface 212 and the contact portion 218 of plug 215 could be replàced by a segmented bulbous end 40 of a plug 34.
A ring (not shown) could be placed at the mouth of tube 208 to prevent unwanted withdrawl of plug 34. The operation of this embodiment would be the same as described above with respect to Figs. 5 and 6.
While there have been shown and described and pointed out the fundamental novel features of the invention as applied to the preferred embodiments, it will be understood that various omissions and substitutions and changes 2~22~
.
of the form and detail~ of the devices illu~trated and < in their operation may be made by tho~e ~killed in the ~ art without departing from the spirlt of the invention.
i . , ~
Claims (9)
1. A high voltage hot stick-operable screw and pin-and-socket assembled connector system for selectively coupling together a source of high voltage and a high voltage cable comprising:
a support member;
an apparatus bushing mounted upon said support member and electrically coupled to a source of high voltage;
a high voltage cable coupled to a connector mounted upon said support member;
selectively applicable pin-and-socket screw-operated link member when applied in a first arrangement joining said apparatus bushing to said cable to apply high voltage thereto or, when not applied between said apparatus bushing and said cable, providing a visible separation between said bushing and said cable;
said pin-and-socket, screw-operated link member comprising a first and a second housing assembly, one of said first and second housing assemblies containing a socket to mate with a pin in said apparatus bushing or said cable connector and the other assembly containing a screw-operated member to mate with the other of said apparatus bushing or said cable connector;
a conductive metallic buss coupling said socket and said screw-operated member for electrically coupling same; and a third housing assembly providing access to said screw-operated member for selectively applying said link member in said first arrangement and for withdrawing said link member from such arrangement.
a support member;
an apparatus bushing mounted upon said support member and electrically coupled to a source of high voltage;
a high voltage cable coupled to a connector mounted upon said support member;
selectively applicable pin-and-socket screw-operated link member when applied in a first arrangement joining said apparatus bushing to said cable to apply high voltage thereto or, when not applied between said apparatus bushing and said cable, providing a visible separation between said bushing and said cable;
said pin-and-socket, screw-operated link member comprising a first and a second housing assembly, one of said first and second housing assemblies containing a socket to mate with a pin in said apparatus bushing or said cable connector and the other assembly containing a screw-operated member to mate with the other of said apparatus bushing or said cable connector;
a conductive metallic buss coupling said socket and said screw-operated member for electrically coupling same; and a third housing assembly providing access to said screw-operated member for selectively applying said link member in said first arrangement and for withdrawing said link member from such arrangement.
2. A link member as defined in claim 1, wherein said screw-operated member is retained in a bore within its associated first or second housing assembly to permit only limited travel of said screw-operated member within said bore.
3. A link member as defined in claim 2, wherein said screw-operated member has an enlarged head at its end adjacent said third housing assembly and said bore has a first annular shoulder upon which the leading surface of said enlarged head can bear to advance said first and second housing assemblies to apply said first arrange-ment.
4. A link assembly as defined in claim 3, further comprising an annular retaining ring in said bore upon the trailing surface of said enlarged head can bear to remove said first and second housing assemblies and remove said link member from said apparatus bushing and said cable.
5. A link assembly as defined in claim 3, wherein said enlarged head of said screw-operated member has a socket in its trailing surface adjacent said third housing assembly; said socket being engaged by a tool inserted through said third housing assembly to apply or remove said link member.
6. A link member as defined in claim 3, wherein said socket is caused to mate with said pin in said appa-ratus bushing of said cable connector at the same time said screw-operated member mates with the other of said apparatus bushing or said cable connector.
7. A link member as defined in claim 4, wherein said socket is caused to withdraw from said pin in said apparatus bushing or said cable connector at the same time as said screw-operated member is withdrawn from the other of said apparatus bushing or said cable con-nector.
8. A link member as defined in claim 1, wherein said pin is a cylindrical pin and said socket is a cylin-drical bore with contact rings therein to engage the surface of said cylindrical pin when said socket is mated with said pin.
9. A link member as defined in claim 1, wherein said pin is a cylindrical hollow pin with its socket receiving end split and enlarged and said socket is a cylindrical bore, said split, enlarged pin ends contacting the interior surface of said socket bore.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US419,514 | 1989-10-10 | ||
| US07/419,514 US4955823A (en) | 1989-10-10 | 1989-10-10 | 600-Amp hot stick-operable screw and pin-and-socket assembled connector system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2022949A1 CA2022949A1 (en) | 1991-04-11 |
| CA2022949C true CA2022949C (en) | 1993-10-26 |
Family
ID=23662605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002022949A Expired - Lifetime CA2022949C (en) | 1989-10-10 | 1990-08-08 | 600-amp hot stick-operable screw and pin-and-socket assembled connector system |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4955823A (en) |
| EP (1) | EP0422503A1 (en) |
| JP (1) | JP2506494B2 (en) |
| KR (1) | KR100222336B1 (en) |
| AU (1) | AU617257B2 (en) |
| CA (1) | CA2022949C (en) |
| DE (1) | DE422503T1 (en) |
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| US6364216B1 (en) * | 2001-02-20 | 2002-04-02 | G&W Electric Co. | Universal power connector for joining flexible cables to rigid devices in any of many configurations |
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| US8408925B2 (en) * | 2010-02-03 | 2013-04-02 | Thomas & Betts International, Inc. | Visible open for switchgear assembly |
| US8388381B2 (en) | 2010-07-21 | 2013-03-05 | Thomas & Betts International, Inc. | Visible open for switchgear assembly |
| US8449310B2 (en) * | 2011-02-04 | 2013-05-28 | Thomas & Betts International, Inc. | Triple cam-operated link |
| WO2014108213A1 (en) * | 2013-01-14 | 2014-07-17 | Tyco Electronics Raychem Gmbh | Disconnectable cable joints with three sockets |
| US9325104B2 (en) | 2013-05-24 | 2016-04-26 | Thomas & Betts International, Inc. | Gelatinous dielectric material for high voltage connector |
| US9437374B2 (en) | 2013-05-24 | 2016-09-06 | Thomas & Betts International Llc | Automated grounding device with visual indication |
| US9443681B2 (en) | 2013-07-29 | 2016-09-13 | Thomas & Betts International Llc | Flexible dielectric material for high voltage switch |
| EP3130041B1 (en) * | 2014-04-07 | 2019-11-27 | S & C Electric Co. | Replaceable bushing for electrical equipment |
| US9385493B2 (en) * | 2014-04-10 | 2016-07-05 | S&C Electric Company | Adjustable bus bar for power distribution equipment |
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| US9948049B2 (en) * | 2016-04-13 | 2018-04-17 | Paccar Inc | Starter post relocation assembly |
| JP6850420B2 (en) * | 2016-12-02 | 2021-03-31 | 日立金属株式会社 | Insulated electric wires and cables using non-halogen flame-retardant resin composition |
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| US3519977A (en) * | 1968-01-11 | 1970-07-07 | Whitaker Cable Corp | High amperage quick disconnect electric coupling structure |
| US3855570A (en) * | 1972-10-02 | 1974-12-17 | Itt | Electrical interconnect device |
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| US4354721A (en) * | 1980-12-31 | 1982-10-19 | Amerace Corporation | Attachment arrangement for high voltage electrical connector |
| US4758175A (en) * | 1986-09-26 | 1988-07-19 | Biw Cable Systems, Inc. | Aircraft ground power cable |
| US4799895A (en) * | 1987-06-22 | 1989-01-24 | Amerace Corporation | 600-Amp hot stick operable screw-assembled connector system |
| US4891016A (en) * | 1989-03-29 | 1990-01-02 | Amerace Corporation | 600-Amp hot stick-operable pin-and-socket assembled connector system |
-
1989
- 1989-10-10 US US07/419,514 patent/US4955823A/en not_active Expired - Lifetime
-
1990
- 1990-08-08 CA CA002022949A patent/CA2022949C/en not_active Expired - Lifetime
- 1990-09-12 KR KR1019900014373A patent/KR100222336B1/en not_active Expired - Fee Related
- 1990-09-17 JP JP2246956A patent/JP2506494B2/en not_active Expired - Fee Related
- 1990-09-19 AU AU62671/90A patent/AU617257B2/en not_active Ceased
- 1990-10-04 DE DE199090119039T patent/DE422503T1/en active Pending
- 1990-10-04 EP EP90119039A patent/EP0422503A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| KR910008888A (en) | 1991-05-31 |
| JPH03145077A (en) | 1991-06-20 |
| DE422503T1 (en) | 1991-11-28 |
| CA2022949A1 (en) | 1991-04-11 |
| KR100222336B1 (en) | 1999-10-01 |
| EP0422503A1 (en) | 1991-04-17 |
| US4955823A (en) | 1990-09-11 |
| JP2506494B2 (en) | 1996-06-12 |
| AU617257B2 (en) | 1991-11-21 |
| AU6267190A (en) | 1991-04-18 |
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| EEER | Examination request | ||
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