Menetelmä ja laitteisto maasulun havaitsemiseen
Method and apparatus for detecting a ground fault, the apparatus including diagnostics unit arranged to monitor a sum current of output phases of a frequency converter, diagnostics unit arranged to detect a ground fault, if the sum current exceeds a predetermined threshold value, and diagnostics uni...
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| creator | VARIS, PEKKA TIIHONEN, VESA |
| description | Method and apparatus for detecting a ground fault, the apparatus including diagnostics unit arranged to monitor a sum current of output phases of a frequency converter, diagnostics unit arranged to detect a ground fault, if the sum current exceeds a predetermined threshold value, and diagnostics unit for performing the initial setting of the threshold value, the diagnostic unit being arranged to determine the value of the sum current when the frequency converter starts up and to set the threshold value so that it is greater than the predetermined value of the sum current. |
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swe</language><subject>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS ; CONTROL OR REGULATION THEREOF ; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS ; GENERATION</subject><creationdate>2009</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=20091130&DB=EPODOC&CC=FI&NR=120565B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20091130&DB=EPODOC&CC=FI&NR=120565B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>VARIS, PEKKA</creatorcontrib><creatorcontrib>TIIHONEN, VESA</creatorcontrib><title>Menetelmä ja laitteisto maasulun havaitsemiseen</title><description>Method and apparatus for detecting a ground fault, the apparatus including diagnostics unit arranged to monitor a sum current of output phases of a frequency converter, diagnostics unit arranged to detect a ground fault, if the sum current exceeds a predetermined threshold value, and diagnostics unit for performing the initial setting of the threshold value, the diagnostic unit being arranged to determine the value of the sum current when the frequency converter starts up and to set the threshold value so that it is greater than the predetermined value of the sum current.</description><subject>APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS</subject><subject>CONTROL OR REGULATION THEREOF</subject><subject>CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER</subject><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>2009</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDDwTc1LLUnNyT28RCErUSEnMbOkJDWzuCRfITcxsbg0pzRPISOxDChanJqbWZyamsfDwJqWmFOcyguluRnk3VxDnD10Uwvy41OLCxKTQQbGu3kaGhmYmpk6ORkTVgEAQF0rwg</recordid><startdate>20091130</startdate><enddate>20091130</enddate><creator>VARIS, PEKKA</creator><creator>TIIHONEN, VESA</creator><scope>EVB</scope></search><sort><creationdate>20091130</creationdate><title>Menetelmä ja laitteisto maasulun havaitsemiseen</title><author>VARIS, PEKKA ; 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| language | fin ; swe |
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| subjects | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION |
| title | Menetelmä ja laitteisto maasulun havaitsemiseen |
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