{"id":4414,"date":"2020-03-10T12:05:45","date_gmt":"2020-03-10T12:05:45","guid":{"rendered":"https:\/\/limit-tools.com\/?page_id=4414"},"modified":"2020-03-10T12:07:56","modified_gmt":"2020-03-10T12:07:56","slug":"sa-mater-man-huvudspanning","status":"publish","type":"page","link":"https:\/\/limit-tools.com\/sv\/tips-and-tricks\/eltest\/sa-mater-man-huvudspanning\/","title":{"rendered":"S\u00e5 m\u00e4ter man huvudsp\u00e4nning"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<\/p>\n<h4><strong>F\u00f6r att m\u00e4ta effektivv\u00e4rdet i en v\u00e4xelsp\u00e4nning anv\u00e4nder man en multimeter, som i sin tur visar v\u00e4rdet i volt. Huvudsp\u00e4nning \u00e4r v\u00e4rdet mellan tv\u00e5 linjeledare.<\/strong><\/h4>\n<p>[\/vc_column_text][vc_column_text]<\/p>\n<h4><strong>Det s.k. trefassystemet<\/strong><\/h4>\n<p>Det vanligaste systemet som anv\u00e4nds framf\u00f6rallt i elmotorer idag kallas f\u00f6r trefassystem, vilket betyder att systemet har tre sp\u00e4nningar, en huvudsp\u00e4nning mellan linjeledarna och en fassp\u00e4nning mellan linjeledare och nollan. Vad som \u00e4r signifikant f\u00f6r ett trefassystem \u00e4r att det kan bilda ett magnetiskt f\u00e4lt som f\u00e5r en j\u00e4mn roterande effekt \u00e4ven om motorn \u00e4r station\u00e4r. <a href=\"https:\/\/limit-tools.com\/sv\/tips-and-tricks\/eltest\/about-rms\/\">Vill du f\u00f6rdjupa dig inom m\u00e4tning av sp\u00e4nning kan du l\u00e4sa v\u00e5r artikel om RMS.<\/a>[\/vc_column_text][vc_column_text]<\/p>\n<h4>Balanserat vs obalanserat<\/h4>\n<p>Generellt sett \u00e4r det allm\u00e4nna n\u00e4tet ett balanserat system, dvs. att alla faser har en lika belastning. Varf\u00f6r man f\u00f6redrar ett balanserat system \u00e4r f\u00f6r att man alltid f\u00e5r ut samma effekt oberoende av var i en period dessa sp\u00e4nningar befinner sig vid tillf\u00e4llet, vilket g\u00f6r att en elmotor g\u00e5r j\u00e4mnt. Men det finns system som inte lever upp till detta s.k. obalanserade system<\/p>\n<p>[\/vc_column_text][vc_column_text]<\/p>\n<h4>Anv\u00e4nd en multimeter eller amperemeter<\/h4>\n<p>F\u00f6r att m\u00e4ta huvudsp\u00e4nning med en multimeter st\u00e4ller man in vredet p\u00e5 V f\u00f6r Volt. D\u00e4refter s\u00e4tter man den r\u00f6da m\u00e4tproben mot pluspolen och den svarta p\u00e5 minuspolen. <a href=\"https:\/\/limit-tools.com\/sv\/product-category\/eltest-sv\/multimetrar-sv\/\">V\u00e5ra multimetrar \u00e4r enkla och precisa, se v\u00e5rt utbud h\u00e4r.<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text]S\u00e5 m\u00e4ter du huvudsp\u00e4nning steg f\u00f6r steg<\/p>\n<ul>\n<li>T\u00e4nk p\u00e5 att huvudsp\u00e4nning ofta \u00e4r den starkare effekten kontra fassp\u00e4nning.<\/li>\n<li>Se till att multimetern klara av den sp\u00e4nningen.<\/li>\n<li>S\u00e4tt multimetern p\u00e5 V f\u00f6r VoltS\u00e4tt den r\u00f6da m\u00e4tproben mot pluspolen och den svarta mot minuspolen.<\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"[vc_row][vc_column][vc_column_text] F\u00f6r att m\u00e4ta effektivv\u00e4rdet i en v\u00e4xelsp\u00e4nning anv\u00e4nder man en multimeter, som i sin tur visar v\u00e4rdet i volt. [&hellip;]","protected":false},"author":2,"featured_media":4415,"parent":4406,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-4414","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S\u00e5 m\u00e4ter man huvudsp\u00e4nning - Precision measuring instruments | Limit<\/title>\n<meta name=\"description\" content=\"F\u00f6r att m\u00e4ta effektivv\u00e4rdet i en v\u00e4xelsp\u00e4nning anv\u00e4nder man en multimeter, som i sin tur visar v\u00e4rdet i volt. 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