{"id":4931,"date":"2025-04-09T11:31:53","date_gmt":"2025-04-09T08:31:53","guid":{"rendered":"https:\/\/www.tkf.fi\/passiva-filter\/"},"modified":"2026-11-12T16:20:48","modified_gmt":"2026-11-12T13:20:48","slug":"passiva-filter","status":"publish","type":"page","link":"https:\/\/www.tkf.fi\/sv\/passiva-filter\/","title":{"rendered":"Passiva filter"},"content":{"rendered":"\t\t
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Passiv&shy;filter<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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I eln\u00e4t f\u00f6rekommer \u00f6vertonsstr\u00f6mmar till f\u00f6ljd av olinj\u00e4ra laster, s\u00e5som datorer, frekvensomriktare och UPS-utrustningar. \u00d6vertonsstr\u00f6mmar orsakar till exempel \u00f6kade f\u00f6rluster och fel p\u00e5 elapparater. Ett filterbatteri beh\u00f6vs n\u00e4r m\u00e4ngden av en viss (exempelvis 5:e eller 7:e)<\/strong> \u00f6verton p\u00e5 n\u00e4tet \u00e4r f\u00f6r stor.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tTa reda p\u00e5 mer<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Filtrering av \u00f6vertoner<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tTj\u00e4nster<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Som namnet anger \u00e4r ett filterbatteri konstruerat att f\u00f6rb\u00e4ttra elkvaliteten i n\u00e4t med h\u00f6g \u00f6vertonshalt genom att filtrera bort \u00f6vertoner av ett visst ordningstal (exempelvis 5.)<\/strong>. Dessutom f\u00f6rb\u00e4ttrar filterbatteriet verkningsgraden p\u00e5 samma s\u00e4tt som ett snedavst\u00e4mt kondensatorbatteri. N\u00e4r \u00f6vertonerna \u00e4r m\u00e5ttliga \u00e4r det b\u00e4ttre att anv\u00e4nda ett snedavst\u00e4mt kondensatorbatteri som \u00e4r billigare \u00e4n ett filterbatteri. N\u00e4r det p\u00e5 n\u00e4tet f\u00f6rekommer exempelvis 5:e och 7:e \u00f6vertonen<\/strong>, \u00e4r l\u00f6sningen att installera ett l\u00e4mpligt dimensionerat filterbatteri separat f\u00f6r vardera \u00f6vertonen. Misstanke om h\u00f6g \u00f6vertonshalt bekr\u00e4ftas genom m\u00e4tningar.<\/p>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Vanligast anv\u00e4nda
passivfilter<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Egenskaper<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– filter f\u00f6r 5:e \u00f6vertonen (250\u00a0Hz), 150\u00a0kvar \u2013 300\u00a0kvar
– filter f\u00f6r 7:e \u00f6vertonen (350\u00a0Hz), 150\u00a0kvar \u2013 300\u00a0kvar
– Sk\u00e5pets m\u00e5tt: 800x600x2000 (bxdxh)
– Sp\u00e4nning, exempelvis 400\u00a0V eller 690\u00a0V
– Temperaturklass 0\u201335\u00a0\u00b0C<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Harmoniska
\u00f6vertoner<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Felfri str\u00f6m och sp\u00e4nning har formen av en sinuskurva (SVART<\/span>).<\/strong>\u00a0Vissa elektriska apparater orsakar att sinuskurvan f\u00f6rvr\u00e4ngs i eln\u00e4tet. S\u00e5dana f\u00f6rvr\u00e4ngningar av sinuskurvan kallas harmoniska \u00f6vertoner. Harmoniska \u00f6vertoner \u00e4r multiplar av grundtonen (O<\/span>L<\/span>I<\/span>K<\/span>F<\/span>\u00c4<\/span>R<\/span>G<\/span>A<\/span>DE<\/span>)<\/strong>. Harmoniska \u00f6vertoner summeras till grundtonen och ger upphov till en f\u00f6rvr\u00e4ngd sinuskurva\u00a0(R\u00d6D<\/span>)<\/strong>.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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TKF:s l\u00f6sningar anv\u00e4nds p\u00e5 tusentals platser, fr\u00e5n kontors\u00ad\u00ad\u00ad\u00ad\u00ad\u00ad&shy;\u00adbyggnader till industrier<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Behoven varierar, fr\u00e5n normal kompensering av reaktiv effekt till kr\u00e4vande samh\u00e4llskritiska till\u00e4mpningar. V\u00e5r kompetens \u00e5tnjuter f\u00f6rtroende fr\u00e5n sjukhus (i Finland exempelvis Tammerfors universitetssjukhus och Satakunta centralsjukhus), f\u00f6rsvarsmakten, infrastrukturobjekt (Helsingfors-Vanda flygplats, Helsingfors tunnelbana), industrier, fastigheter (VVO, Senatfastigheter) och elbolag.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tKunder<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tKontakta oss<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Passiv&shy;filter I eln\u00e4t f\u00f6rekommer \u00f6vertonsstr\u00f6mmar till f\u00f6ljd av olinj\u00e4ra laster, s\u00e5som datorer, frekvensomriktare och UPS-utrustningar. \u00d6vertonsstr\u00f6mmar orsakar till exempel \u00f6kade […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-4931","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/pages\/4931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/comments?post=4931"}],"version-history":[{"count":7,"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/pages\/4931\/revisions"}],"predecessor-version":[{"id":5050,"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/pages\/4931\/revisions\/5050"}],"wp:attachment":[{"href":"https:\/\/www.tkf.fi\/sv\/wp-json\/wp\/v2\/media?parent=4931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}