PARTIAL DISCHARGE DETECTOR FOR SWITCHGEAR
PURPOSE:To detect partial discharge by arranging first and second conductive parts on the surface and at the end part of a cable joint, while separating each other, and producing a differential voltage between them upon occurrence of partial discharge. CONSTITUTION:An insulating part 4c is arranged...
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| creator | MORI YOSHIYUKI SHIZAKI YASUHIDE |
| description | PURPOSE:To detect partial discharge by arranging first and second conductive parts on the surface and at the end part of a cable joint, while separating each other, and producing a differential voltage between them upon occurrence of partial discharge. CONSTITUTION:An insulating part 4c is arranged in band shape between a conductive layer 4a and a metallic cover 5a on the surface of a cable joint 4 in order to insulate them. Upon occurrence of partial discharge in a discharge gap (d), formed in an insulator on the side of a switchgear by voids and the like, a local voltage variation V takes place in the vicinity of the partial discharge. The voltage variation V propagates in the form of a pulse wave through the switchgear and the cable 5 with a speed close to the speed of light thus producing a differential voltage V0 between the conductive layer 4a and the metallic cover 5a at the opposite ends of the insulating part 4c. The differential voltage V0 is then detected at a partial discharge detecting circuit section. |
| format | Patent |
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CONSTITUTION:An insulating part 4c is arranged in band shape between a conductive layer 4a and a metallic cover 5a on the surface of a cable joint 4 in order to insulate them. Upon occurrence of partial discharge in a discharge gap (d), formed in an insulator on the side of a switchgear by voids and the like, a local voltage variation V takes place in the vicinity of the partial discharge. The voltage variation V propagates in the form of a pulse wave through the switchgear and the cable 5 with a speed close to the speed of light thus producing a differential voltage V0 between the conductive layer 4a and the metallic cover 5a at the opposite ends of the insulating part 4c. The differential voltage V0 is then detected at a partial discharge detecting circuit section.</description><language>eng</language><subject>BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLYOR DISTRIBUTION OF ELECTRIC POWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; GENERATION</subject><creationdate>1991</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910726&DB=EPODOC&CC=JP&NR=H03173306A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910726&DB=EPODOC&CC=JP&NR=H03173306A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MORI YOSHIYUKI</creatorcontrib><creatorcontrib>SHIZAKI YASUHIDE</creatorcontrib><title>PARTIAL DISCHARGE DETECTOR FOR SWITCHGEAR</title><description>PURPOSE:To detect partial discharge by arranging first and second conductive parts on the surface and at the end part of a cable joint, while separating each other, and producing a differential voltage between them upon occurrence of partial discharge. CONSTITUTION:An insulating part 4c is arranged in band shape between a conductive layer 4a and a metallic cover 5a on the surface of a cable joint 4 in order to insulate them. Upon occurrence of partial discharge in a discharge gap (d), formed in an insulator on the side of a switchgear by voids and the like, a local voltage variation V takes place in the vicinity of the partial discharge. The voltage variation V propagates in the form of a pulse wave through the switchgear and the cable 5 with a speed close to the speed of light thus producing a differential voltage V0 between the conductive layer 4a and the metallic cover 5a at the opposite ends of the insulating part 4c. 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CONSTITUTION:An insulating part 4c is arranged in band shape between a conductive layer 4a and a metallic cover 5a on the surface of a cable joint 4 in order to insulate them. Upon occurrence of partial discharge in a discharge gap (d), formed in an insulator on the side of a switchgear by voids and the like, a local voltage variation V takes place in the vicinity of the partial discharge. The voltage variation V propagates in the form of a pulse wave through the switchgear and the cable 5 with a speed close to the speed of light thus producing a differential voltage V0 between the conductive layer 4a and the metallic cover 5a at the opposite ends of the insulating part 4c. The differential voltage V0 is then detected at a partial discharge detecting circuit section.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLYOR DISTRIBUTION OF ELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
| title | PARTIAL DISCHARGE DETECTOR FOR SWITCHGEAR |
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