HETEROPHASE GROUND DETECTION SYSTEM
PURPOSE:To specify a ground-fault generating section by providing a plurality of slave stations outputting the operation statuses of zero-phase overcurrent relays at every section and a ground directional relay and a master station receiving the signals of the slave stations in a power distribution...
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| creator | EBIZAKA TOSHINOBU KANEDA AKIRA ISAHAYA KEIJI KAMIWAKI KENJI YAMAMOTO HISAO |
| description | PURPOSE:To specify a ground-fault generating section by providing a plurality of slave stations outputting the operation statuses of zero-phase overcurrent relays at every section and a ground directional relay and a master station receiving the signals of the slave stations in a power distribution system partitioned into a plurality of sections. CONSTITUTION:In a power distribution system composed of a bus 1 and distribution lines 21, 22, zero-phase current transformers ZCT 511... and slave stations 911... are provided at every section 11... Each slave station 911... has ground directional relays 611... and zero-phase overcurrent relays 711... A master station 14 collects the operation statuses of the relays transmitted from the slave stations 911... through a communication line 13. When a ground fault is generated, the master station 14 receives a signal from the corresponding slave station and interrupts a corresponding circuit breaker 41 or 42 while investigating a response signal from another slave station, and specifies a ground-fault generating section from the operation status of the relay of the adjacent slave station. Accordingly, fault sections can be specified even in faults simultaneously generated in different distribution lines. |
| format | Patent |
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CONSTITUTION:In a power distribution system composed of a bus 1 and distribution lines 21, 22, zero-phase current transformers ZCT 511... and slave stations 911... are provided at every section 11... Each slave station 911... has ground directional relays 611... and zero-phase overcurrent relays 711... A master station 14 collects the operation statuses of the relays transmitted from the slave stations 911... through a communication line 13. When a ground fault is generated, the master station 14 receives a signal from the corresponding slave station and interrupts a corresponding circuit breaker 41 or 42 while investigating a response signal from another slave station, and specifies a ground-fault generating section from the operation status of the relay of the adjacent slave station. Accordingly, fault sections can be specified even in faults simultaneously generated in different distribution lines.</description><language>eng</language><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; 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=19910403&DB=EPODOC&CC=JP&NR=H0378433A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910403&DB=EPODOC&CC=JP&NR=H0378433A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>EBIZAKA TOSHINOBU</creatorcontrib><creatorcontrib>KANEDA AKIRA</creatorcontrib><creatorcontrib>ISAHAYA KEIJI</creatorcontrib><creatorcontrib>KAMIWAKI KENJI</creatorcontrib><creatorcontrib>YAMAMOTO HISAO</creatorcontrib><title>HETEROPHASE GROUND DETECTION SYSTEM</title><description>PURPOSE:To specify a ground-fault generating section by providing a plurality of slave stations outputting the operation statuses of zero-phase overcurrent relays at every section and a ground directional relay and a master station receiving the signals of the slave stations in a power distribution system partitioned into a plurality of sections. CONSTITUTION:In a power distribution system composed of a bus 1 and distribution lines 21, 22, zero-phase current transformers ZCT 511... and slave stations 911... are provided at every section 11... Each slave station 911... has ground directional relays 611... and zero-phase overcurrent relays 711... A master station 14 collects the operation statuses of the relays transmitted from the slave stations 911... through a communication line 13. When a ground fault is generated, the master station 14 receives a signal from the corresponding slave station and interrupts a corresponding circuit breaker 41 or 42 while investigating a response signal from another slave station, and specifies a ground-fault generating section from the operation status of the relay of the adjacent slave station. Accordingly, fault sections can be specified even in faults simultaneously generated in different distribution lines.</description><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</subject><subject>GENERATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFD2cA1xDfIP8HAMdlVwD_IP9XNRcAEKOYd4-vspBEcGh7j68jCwpiXmFKfyQmluBgU31xBnD93Ugvz41OKCxOTUvNSSeK8ADwNjcwsTY2NHYyKUAAA33SLN</recordid><startdate>19910403</startdate><enddate>19910403</enddate><creator>EBIZAKA TOSHINOBU</creator><creator>KANEDA AKIRA</creator><creator>ISAHAYA KEIJI</creator><creator>KAMIWAKI KENJI</creator><creator>YAMAMOTO HISAO</creator><scope>EVB</scope></search><sort><creationdate>19910403</creationdate><title>HETEROPHASE GROUND DETECTION SYSTEM</title><author>EBIZAKA TOSHINOBU ; KANEDA AKIRA ; ISAHAYA KEIJI ; KAMIWAKI KENJI ; YAMAMOTO HISAO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0378433A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1991</creationdate><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS</topic><topic>GENERATION</topic><toplevel>online_resources</toplevel><creatorcontrib>EBIZAKA TOSHINOBU</creatorcontrib><creatorcontrib>KANEDA AKIRA</creatorcontrib><creatorcontrib>ISAHAYA KEIJI</creatorcontrib><creatorcontrib>KAMIWAKI KENJI</creatorcontrib><creatorcontrib>YAMAMOTO HISAO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>EBIZAKA TOSHINOBU</au><au>KANEDA AKIRA</au><au>ISAHAYA KEIJI</au><au>KAMIWAKI KENJI</au><au>YAMAMOTO HISAO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>HETEROPHASE GROUND DETECTION SYSTEM</title><date>1991-04-03</date><risdate>1991</risdate><abstract>PURPOSE:To specify a ground-fault generating section by providing a plurality of slave stations outputting the operation statuses of zero-phase overcurrent relays at every section and a ground directional relay and a master station receiving the signals of the slave stations in a power distribution system partitioned into a plurality of sections. CONSTITUTION:In a power distribution system composed of a bus 1 and distribution lines 21, 22, zero-phase current transformers ZCT 511... and slave stations 911... are provided at every section 11... Each slave station 911... has ground directional relays 611... and zero-phase overcurrent relays 711... A master station 14 collects the operation statuses of the relays transmitted from the slave stations 911... through a communication line 13. When a ground fault is generated, the master station 14 receives a signal from the corresponding slave station and interrupts a corresponding circuit breaker 41 or 42 while investigating a response signal from another slave station, and specifies a ground-fault generating section from the operation status of the relay of the adjacent slave station. Accordingly, fault sections can be specified even in faults simultaneously generated in different distribution lines.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION |
| title | HETEROPHASE GROUND DETECTION SYSTEM |
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