CA1099360A - High voltage cable terminator - Google Patents
High voltage cable terminatorInfo
- Publication number
- CA1099360A CA1099360A CA282,759A CA282759A CA1099360A CA 1099360 A CA1099360 A CA 1099360A CA 282759 A CA282759 A CA 282759A CA 1099360 A CA1099360 A CA 1099360A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- cable
- terminator
- passage
- bonded
- 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
Links
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
A HIGH VOLTAGE CABLE TERMINATOR
Abstract A terminator for a high voltage cable including a solid track resistant dielectric housing having a passage for receiving the end of a cable to be terminated, a connector within the passage for terminating the exposed end of the electrical conductor of the cable, an elastomeric sleeve bonded to one end of the dielectric housing and having a passage for scalingly engaging the cable, an electrically conductive shield within the passage in the dielectric housing, and a conductive washer connecting the connector to the shield to maintain an equal electrical potential throughout the length of the passage.
Abstract A terminator for a high voltage cable including a solid track resistant dielectric housing having a passage for receiving the end of a cable to be terminated, a connector within the passage for terminating the exposed end of the electrical conductor of the cable, an elastomeric sleeve bonded to one end of the dielectric housing and having a passage for scalingly engaging the cable, an electrically conductive shield within the passage in the dielectric housing, and a conductive washer connecting the connector to the shield to maintain an equal electrical potential throughout the length of the passage.
Description
3i~
~ nd of the Invention Generally, high voltage cable terminators must provide a track resistant creepage path between a line conductor and ground plane of the stress relief device. In an outdoor environment, this creepage path has to withstand atmospheric contaminations such as salt spray, rain, chemical fumes, etc. In order to accomplish this, track resistant materials such as porcelain, epoxy, or elastomeric materials are used to provide the track resistant creepage path. ~owever, the porcelain and epoxy type terminators use oil, grease or various types of rubber tubes to seal the cable insulation 1~ interface. This type of terminator therefore requires special handling in order to complete cable termination.
Summary of the Invention The terminator according to the present inv0ntion provides both a creepage path and a reliable intererence fit between the cable insulation and the terminator in a single compact device. The external portion of the terminator is formed of a solid dielectric material which is known to have a track resistance sufficient to prevent creepage. The lower portion of the terminator is provided with an elastomeric sleeve which is bonded to the di-electric portion and has a passage which will engage the cable with an inter-~0 ference it.
Thus, in accordance with a broad aspect of the invention, th0re isprovided a terminator for terminating an end of a shielded high voltage cable having an electrical conductor and a cable insulation, said terminator com-prising: a solid track resistant dielectric housing having a bore for receiving the end of the cable to be terminated, a connector supported by said housing for terminating an exposed end of the electrical conducto:r of the cable, an elastomeric sleeve bonded to said housing and having a passage orming an extension of said bore for sealingly engaging the cable insulation, an electrically conductive material on the surface of said bore and means for electrically connecting said material to said connector whereby said conduc-tive material provides an equal electrical potential throughout the length of said bore.
3~al Drawings FIGURE 1 is an elevation view of the terminator according to the invention having a portion of the terminator shown in section;
2a-. .
: ., : .. , FIGURl. 2 is an enlargecl view in section of the lower portion of the terminator of FIGURE 1 showing the elclstollleric sleeve bonded to the ou~er sur:Eace of the ~orce-:lain llousing;
F:[GURE 3 is a view of a modi:fied terminator accor(lillg to tl~e :invelltion havi.ng a pOl`t:iO31 broken away to sho~ the upper end of the terminato~r; ancl FIGURI L~ is an enlarged view in section of the lower ~)ortion o:E the ter~i.rlator of ~IGURE 3 showing the eias~omeri.c l.Q sloeve bonded to the i.nner sur:Eace of the porcelain housing.
Description of the Invention ..... ..... .
I\S seen in FIGURES.l and 2 of the drawings,..the terminator 10 according to the invention includes a solid dielectric housing 12 and an elastomeric sleeve 14. The - termin;ltor 10 is silown supported by a bracket type support 16 ~IclVillg a band 18 encircling the base of the terminator 10.
high voltage cable 20 is shown inserted tllroug]l the s].eeve 1~ for termination within tlle housi.ng 12.
In this regard, the high voltage cable 20 generally ~0 includes a conductor 22~ a cable insulation 24 and a. cable sh:ie:lcl 26. The cable 20 is prepared for termination by remov-ing a l)ortion of the cable shield 26 to expose the ca.ble insulation 24. A.portion o:f the cable i~suIation 2~ is then removed to expose a portion o the cable condu~tor 22.
Tlle ilousing 12 is formed o~ a solid dielectric material such as porcelain and includes a number of skirts 28 and a mounting flange 30. A passage 32 is provided within 93~
't}le llousing 12 w]lich is lined with all el~ctrically concluctive m.lt~l,i.il 33. rrh~ end o~ tlle ]lousinK extellds beyollcl the .flangc 30 to provi(le a mounting surface 34 for the sleeve 14 as clesc-ril)e(l hereinaf-ter.
Tlle sleev~ 14 includes dn inner member 35 forme.cl 0 f ~IIl e.l.lstOllleriC ma~eri~1 SUC]l as rubber and includes a passagc 36. Th~ p.lssage 36 has Ct d.iameter equal to or sl.ightly 'less t.h.lll the di.ameter of the cab:le insulation 24 i.n order to provi(le an inter:Eerence Eit to form'a seal with the cable on 10 .illsert.ioll .into the hous'ing 12An electrically condùctive CO;It~ g 3~ in the Eorm'o:E a conductive el.astomeric matérial ~ ovicLecl Oll t]le o~t.er surface o:E the member 35 and extends l~,eyoll(l tlle end o:E -the passage 36 to electrically engage the cabLe sl~ield 2G.
Tlle member 35 is provided Wit]l a cylindrica.l portion 37 whicl~ is slightly smaller tllan t]~e mounti.ng sur-face, 34.
'I`he portion 37 is mounted on ancl bonded to tile sur:Eace~ 34 on t1le l~ousing 12, :Eor example, by,molding. Voltage stress at t1~e el~(l o:E the passage 32 is relieved by means o-E a conductlve ril~g 40 provicled at the end of passage 36 in member 35.
Tlle ca~le 20 is term'inated witllin the passage 32.
olls~ g 12 by mealls oE a connector 42 hav:ing a recess 44 ~or receiv:ing the ènd` o:E the conductor~22. Tile connector,42 is crimped to secure the conne,ctor to the conductor. The coll~lector ~2 is enclosecl within a conductive cap 46. The volt~ge gradient witll.in the passage 32 .IS reduced to a minimum ~y means ol` a conductive was]ler 48. Tlle voltage thToughout tlle ~ , - - . . . .
..
.
3~i~
:L`ull le?lgth o:~ tlle passage 32 will then be substalltially the sallle as the voltage of the connector 42.
In the alterna-te embodiment of't}le invention shown in FIGUI~S 3 and 4, a terminator 50 is shown which includes a solid dielectric housing 52 and an elastomeric sleeve 54.
Tlle te~rm;.nator 50 is supported by a C-ring clamp 56 WhiC
inclucles a .~lange 58 on the housing~52.
In this embodiment the housing 52 is provided Wit]l ,a t~ass.lge 60 and a plur,ality of skirts 62 on the outer sur:Eace oE thc housing 52. A conductive shield 64 is provided on the s~ ace of the passage 60 which terminàtes short of the ond o the passage 60 in the housing 52.
. The sleeve 54 includes an inner member 55 :Eormed o~ an elastomeric material such as rubber and has an axial passage 66. The passage 66 has.a diameter slightly smaller than the cliameter of the cable insulation ~,4 to provide an int~erference it to form a seal with the cable insula-tl.on on i1~sertlon into the housing 52. An electr'ically conducti,ve coating`68 in the form o,E~a c,onductive elastom'eric material ls providecl o~i the outer surface of the member 55.
Me~ns are provided on`~,he member 55 or securing t~le s.leeve 54 to the housillg 52. Such means is in the form of a cylindri.cal portion 70 provicled on the member 55. The portion 70'has an outer,dlameter equal to or slightly greater than the passage 60 and is bonded to~the housing 52, for e~aml)ler by molcling. Voltage stress wi.tllin the passage 60 is reduced to a minimum by providl.ng a slecive 72 of electl~ically conductive elastomeric material within the portion 70 ~hich extends beyond the end of the portion' 70 to engage , the concluctive shield 64.
3~
The c.ll)le 20~ :is termi.nated with:in the p~lssage 60 in ho~lsing 52 by means of a conllector 42 having a recess 44 :~or rcceiving the end o:E the conductor 22. 'I`he connector 42 :is crimped to the conductor 22. The connector ~2 is re~ained within the housing 52 by means -of a conducti.ve washer 74 and a metal cap 76 which is crimped to the hous`ing 52. The conductive wasller .7~ provides an e~ectrical connection ~etween ~the connector 42 and the conductive shield 64.
-6- .
~ nd of the Invention Generally, high voltage cable terminators must provide a track resistant creepage path between a line conductor and ground plane of the stress relief device. In an outdoor environment, this creepage path has to withstand atmospheric contaminations such as salt spray, rain, chemical fumes, etc. In order to accomplish this, track resistant materials such as porcelain, epoxy, or elastomeric materials are used to provide the track resistant creepage path. ~owever, the porcelain and epoxy type terminators use oil, grease or various types of rubber tubes to seal the cable insulation 1~ interface. This type of terminator therefore requires special handling in order to complete cable termination.
Summary of the Invention The terminator according to the present inv0ntion provides both a creepage path and a reliable intererence fit between the cable insulation and the terminator in a single compact device. The external portion of the terminator is formed of a solid dielectric material which is known to have a track resistance sufficient to prevent creepage. The lower portion of the terminator is provided with an elastomeric sleeve which is bonded to the di-electric portion and has a passage which will engage the cable with an inter-~0 ference it.
Thus, in accordance with a broad aspect of the invention, th0re isprovided a terminator for terminating an end of a shielded high voltage cable having an electrical conductor and a cable insulation, said terminator com-prising: a solid track resistant dielectric housing having a bore for receiving the end of the cable to be terminated, a connector supported by said housing for terminating an exposed end of the electrical conducto:r of the cable, an elastomeric sleeve bonded to said housing and having a passage orming an extension of said bore for sealingly engaging the cable insulation, an electrically conductive material on the surface of said bore and means for electrically connecting said material to said connector whereby said conduc-tive material provides an equal electrical potential throughout the length of said bore.
3~al Drawings FIGURE 1 is an elevation view of the terminator according to the invention having a portion of the terminator shown in section;
2a-. .
: ., : .. , FIGURl. 2 is an enlargecl view in section of the lower portion of the terminator of FIGURE 1 showing the elclstollleric sleeve bonded to the ou~er sur:Eace of the ~orce-:lain llousing;
F:[GURE 3 is a view of a modi:fied terminator accor(lillg to tl~e :invelltion havi.ng a pOl`t:iO31 broken away to sho~ the upper end of the terminato~r; ancl FIGURI L~ is an enlarged view in section of the lower ~)ortion o:E the ter~i.rlator of ~IGURE 3 showing the eias~omeri.c l.Q sloeve bonded to the i.nner sur:Eace of the porcelain housing.
Description of the Invention ..... ..... .
I\S seen in FIGURES.l and 2 of the drawings,..the terminator 10 according to the invention includes a solid dielectric housing 12 and an elastomeric sleeve 14. The - termin;ltor 10 is silown supported by a bracket type support 16 ~IclVillg a band 18 encircling the base of the terminator 10.
high voltage cable 20 is shown inserted tllroug]l the s].eeve 1~ for termination within tlle housi.ng 12.
In this regard, the high voltage cable 20 generally ~0 includes a conductor 22~ a cable insulation 24 and a. cable sh:ie:lcl 26. The cable 20 is prepared for termination by remov-ing a l)ortion of the cable shield 26 to expose the ca.ble insulation 24. A.portion o:f the cable i~suIation 2~ is then removed to expose a portion o the cable condu~tor 22.
Tlle ilousing 12 is formed o~ a solid dielectric material such as porcelain and includes a number of skirts 28 and a mounting flange 30. A passage 32 is provided within 93~
't}le llousing 12 w]lich is lined with all el~ctrically concluctive m.lt~l,i.il 33. rrh~ end o~ tlle ]lousinK extellds beyollcl the .flangc 30 to provi(le a mounting surface 34 for the sleeve 14 as clesc-ril)e(l hereinaf-ter.
Tlle sleev~ 14 includes dn inner member 35 forme.cl 0 f ~IIl e.l.lstOllleriC ma~eri~1 SUC]l as rubber and includes a passagc 36. Th~ p.lssage 36 has Ct d.iameter equal to or sl.ightly 'less t.h.lll the di.ameter of the cab:le insulation 24 i.n order to provi(le an inter:Eerence Eit to form'a seal with the cable on 10 .illsert.ioll .into the hous'ing 12An electrically condùctive CO;It~ g 3~ in the Eorm'o:E a conductive el.astomeric matérial ~ ovicLecl Oll t]le o~t.er surface o:E the member 35 and extends l~,eyoll(l tlle end o:E -the passage 36 to electrically engage the cabLe sl~ield 2G.
Tlle member 35 is provided Wit]l a cylindrica.l portion 37 whicl~ is slightly smaller tllan t]~e mounti.ng sur-face, 34.
'I`he portion 37 is mounted on ancl bonded to tile sur:Eace~ 34 on t1le l~ousing 12, :Eor example, by,molding. Voltage stress at t1~e el~(l o:E the passage 32 is relieved by means o-E a conductlve ril~g 40 provicled at the end of passage 36 in member 35.
Tlle ca~le 20 is term'inated witllin the passage 32.
olls~ g 12 by mealls oE a connector 42 hav:ing a recess 44 ~or receiv:ing the ènd` o:E the conductor~22. Tile connector,42 is crimped to secure the conne,ctor to the conductor. The coll~lector ~2 is enclosecl within a conductive cap 46. The volt~ge gradient witll.in the passage 32 .IS reduced to a minimum ~y means ol` a conductive was]ler 48. Tlle voltage thToughout tlle ~ , - - . . . .
..
.
3~i~
:L`ull le?lgth o:~ tlle passage 32 will then be substalltially the sallle as the voltage of the connector 42.
In the alterna-te embodiment of't}le invention shown in FIGUI~S 3 and 4, a terminator 50 is shown which includes a solid dielectric housing 52 and an elastomeric sleeve 54.
Tlle te~rm;.nator 50 is supported by a C-ring clamp 56 WhiC
inclucles a .~lange 58 on the housing~52.
In this embodiment the housing 52 is provided Wit]l ,a t~ass.lge 60 and a plur,ality of skirts 62 on the outer sur:Eace oE thc housing 52. A conductive shield 64 is provided on the s~ ace of the passage 60 which terminàtes short of the ond o the passage 60 in the housing 52.
. The sleeve 54 includes an inner member 55 :Eormed o~ an elastomeric material such as rubber and has an axial passage 66. The passage 66 has.a diameter slightly smaller than the cliameter of the cable insulation ~,4 to provide an int~erference it to form a seal with the cable insula-tl.on on i1~sertlon into the housing 52. An electr'ically conducti,ve coating`68 in the form o,E~a c,onductive elastom'eric material ls providecl o~i the outer surface of the member 55.
Me~ns are provided on`~,he member 55 or securing t~le s.leeve 54 to the housillg 52. Such means is in the form of a cylindri.cal portion 70 provicled on the member 55. The portion 70'has an outer,dlameter equal to or slightly greater than the passage 60 and is bonded to~the housing 52, for e~aml)ler by molcling. Voltage stress wi.tllin the passage 60 is reduced to a minimum by providl.ng a slecive 72 of electl~ically conductive elastomeric material within the portion 70 ~hich extends beyond the end of the portion' 70 to engage , the concluctive shield 64.
3~
The c.ll)le 20~ :is termi.nated with:in the p~lssage 60 in ho~lsing 52 by means of a conllector 42 having a recess 44 :~or rcceiving the end o:E the conductor 22. 'I`he connector 42 :is crimped to the conductor 22. The connector ~2 is re~ained within the housing 52 by means -of a conducti.ve washer 74 and a metal cap 76 which is crimped to the hous`ing 52. The conductive wasller .7~ provides an e~ectrical connection ~etween ~the connector 42 and the conductive shield 64.
-6- .
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A terminator for terminating an end of a shielded high voltage cable having an electrical conductor and a cable insulation, with a portion of the cable insulator being removed to expose an end of its conductor, said terminator comprising: a solid track resistant dielectric housing having a passage for receiving the end of the cable to be terminated, means supported by said housing for terminating the exposed end of the electrical conductor, an elastomeric sleeve bonded to and forming an extension of said housing and having a passage for sealingly engaging the end of the cable, an elec-trically conductive shield within the passage in said housing and means within said housing for electrically connecting said shield to said terminat-ing means to maintain an equal electrical potential across said terminating means.
2. The terminator according to claim 1 wherein said elastomeric sleeve includes a portion for sealingly engaging said housing.
3. The terminator according to claim 2 wherein said portion is bonded to the outer surface of said housing.
4. The terminator according to claim 2 wherein said portion is bonded to the surface of said passage in said housing.
5. The terminator according to claim 4 including an inner electrically conductive sleeve provided on the inner surface of said portion of the elastomeric sleeve and extending beyond said portion to engage said shield.
6. The terminator according to claim 1 wherein said electrically conductive shield comprises an electrically conductive material provided on the surface of the passage in said housing.
7. The terminator according to claim 1 wherein said electrically con-ductive shield includes a conductive material provided on the surface of the passage in said sleeve.
8. A terminator for terminating an end of a shielded high voltage cable having an electrical conductor and a cable insulation, said terminator comprising: a solid track resistant dielectric housing having a bore for receiving the end of the cable to be terminated, a connector supported by said housing for terminating an exposed end of the electrical conductor of the cable, an elastomeric sleeve bonded to said housing and having a passage forming an extension of said bore for sealingly engaging the cable insulation, an electrically conductive material on the surface of said bore and means for electrically connecting said material to said connector whereby said conduc-tive material provides an equal electrical potential throughout the length of said bore.
9. The terminator according to claim 8 wherein said dielectric housing is formed from porcelain.
10. The terminator according to claim 8 wherein said elastomeric sleeve includes a portion for sealingly engaging said housing.
11. The terminator according to claim 10 wherein said portion is bonded to the surface of said housing.
12. The terminator according to claim 10 wherein said portion is bonded to the inner surface of said bore in said housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70650876A | 1976-07-19 | 1976-07-19 | |
| US706,508 | 1976-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1099360A true CA1099360A (en) | 1981-04-14 |
Family
ID=24837921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,759A Expired CA1099360A (en) | 1976-07-19 | 1977-07-14 | High voltage cable terminator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1099360A (en) |
-
1977
- 1977-07-14 CA CA282,759A patent/CA1099360A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |