{"id":1272,"date":"2018-12-17T13:22:24","date_gmt":"2018-12-17T13:22:24","guid":{"rendered":"http:\/\/limit-tools.local\/tips-and-tricks\/about-electrical-safety\/"},"modified":"2019-04-29T08:35:35","modified_gmt":"2019-04-29T08:35:35","slug":"about-electrical-safety","status":"publish","type":"page","link":"https:\/\/limittools.test.consids5.se\/sv\/tips-and-tricks\/about-electrical-safety\/","title":{"rendered":"OM ELS\u00c4KERHET"},"content":{"rendered":"

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I takt med att distributionssystem och belastning blir alltmer komplexa \u00f6kar risken fo\u0308r o\u0308verspa\u0308nningstransienter. Motorer, kondensatorer och utrustning fo\u0308r stro\u0308mkonvertering, som motorstyrningar med variabel hastighet, kan ge upphov till ljusba\u030agar. Blixtnedslag i kraftledningar utomhus kan orsaka extremt farliga transienter med ho\u0308g energi. Na\u0308r du utfo\u0308r ma\u0308tningar pa\u030a elektriska system utgo\u0308r dessa transienter en \u201cosynlig\u201d och i stort sett oundviklig fara. de uppsta\u030ar regelbundet i la\u030agspa\u0308nningskretsar och kan n\u00e5 toppv\u00e4rden p\u00e5 tusentals volt. f\u00f6r att du ska kunna skydda dig mot transienter ma\u030aste sa\u0308kerheten finnas inbyggd i testutrustningen.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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\"Overvoltage
I texter och tabeller har vi angivit sa\u0308kerhetsklassen fo\u0308r respektive instrument sa\u030a att du kan va\u0308lja ra\u0308tt niva\u030a fo\u0308r dina arbeten.<\/figcaption><\/figure><\/div>[\/vc_column][\/vc_row][vc_row css_animation=”bounceIn” css=”.vc_custom_1545052763468{border-radius: 2px !important;}”][vc_column width=”1\/3″][vc_column_text]<\/p>\n

\u00d6versp\u00e4nning<\/h4>\n

[\/vc_column_text][vc_column_text]KAT IV<\/strong>[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]<\/p>\n

Sammanfattning<\/h4>\n

[\/vc_column_text][vc_column_text]Trefas p\u00e5 prim\u00e4r niv\u00e5, alla ledare f\u00f6r utomhusbruk.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]<\/p>\n

Exempel<\/h4>\n

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  • Ha\u0308nvisar till \u201cinstallationens ursprung\u201d, dvs. da\u0308r la\u030agspa\u0308nningsanslutningen anslo\u0308ts till eluttaget.<\/li>\n
  • Elma\u0308tare, prima\u0308ra o\u0308verslagsskyddsutrustningar<\/li>\n
  • Utomhus och pa\u030a serviceniva\u030a, serviceledningar fra\u030an pol till byggnad, ga\u030ar mellan ma\u0308tare och panel.<\/li>\n
  • Luftfo\u0308rbindelse med friliggande byggnad, markfo\u0308rbindelse med brunnspump.<\/li>\n<\/ul>\n

    [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/3″][vc_column_text]KAT III<\/strong>[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]Trefasdistribution, inklusive enfasig kommersiell belysning.[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]<\/p>\n

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    • Utrustning i fasta installationer, t.ex. kontrollutrustning och flerfasmotorer.<\/li>\n
    • Buss och matning vid industrianla\u0308ggningar.<\/li>\n
    • Matarkablar och korta huvudspa\u0308nningskretsar, distributionspanelsenheter.<\/li>\n
    • Belysningssystem i sto\u0308rre byggnader<\/li>\n
    • Apparatuttag med korta anslutningar till serviceniva\u030an.<\/li>\n<\/ul>\n

      [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/3″][vc_column_text]KAT II<\/strong>[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]<\/p>\n

      Enfas kontaktanslutna belastningar<\/div>\n

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      • Utrustning, b\u00e4rbara verktyg samt hush\u00e5lls- och andra belastningar.<\/li>\n
      • Uttag och la\u030anga huvudspa\u0308nningskretsar.<\/li>\n
      • Uttag vid mer a\u0308n 10 meter fra\u030an KAT III-ka\u0308llan.<\/li>\n
      • Uttag vid mer a\u0308n 20 meter fra\u030an KAT IV-ka\u0308llan.<\/li>\n<\/ul>\n

        [\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"[vc_row][vc_column][vc_column_text] I takt med att distributionssystem och belastning blir alltmer komplexa \u00f6kar risken fo\u0308r o\u0308verspa\u0308nningstransienter. 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