hvad er meningen med cos phi?
[fusion\_builder\_container type="flex" hundred\_percent="no" hundred\_percent\_height="no" hundred\_percent\_height\_scroll="no" align\_content="stretch" flex\_align\_items="flex-start" flex\_justify\_content="flex-start" hundred\_percent\_height\_center\_content="yes" equal\_height\_columns="no" container\_tag="div" hide\_on\_mobile="small-visibility,medium-visibility,large-visibility" status="published" border\_style="solid" box\_shadow="no" box\_shadow\_blur="0" box\_shadow\_spread="0" gradient\_start\_position="0" gradient\_end\_position="100" gradient\_type="linear" radial\_direction="center center" linear\_angle="180" background\_position="center center" background\_repeat="no-repeat" fade="no" background\_parallax="none" enable\_mobile="no" parallax\_speed="0.3" background\_blend\_mode="none" video\_aspect\_ratio="16:9" video\_loop="yes" video\_mute="yes" absolute="off" absolute\_devices="small,medium,large" sticky="off" sticky\_devices="small-visibility,medium-visibility,large-visibility" sticky\_transition\_offset="0" scroll\_offset="0" animation\_direction="left" animation\_speed="0.3" filter\_hue="0" filter\_saturation="100" filter\_brightness="100" filter\_contrast="100" filter\_invert="0" filter\_sepia="0" filter\_opacity="100" filter\_blur="0" filter\_hue\_hover="0" filter\_saturation\_hover="100" filter\_brightness\_hover="100" filter\_contrast\_hover="100" filter\_invert\_hover="0" filter\_sepia\_hover="0" filter\_opacity\_hover="100" filter\_blur\_hover="0"][fusion\_builder\_row][fusion\_builder\_column type="1\_1" type="1\_1" align\_self="auto" content\_layout="column" align\_content="flex-start" content\_wrap="wrap" spacing="" center\_content="no" link="" target="\_self" min\_height="" hide\_on\_mobile="small-visibility,medium-visibility,large-visibility" sticky\_display="normal,sticky" class="" id="" type\_medium="" type\_small="" order\_medium="0" order\_small="0" dimension\_spacing\_medium="" dimension\_spacing\_small="" dimension\_spacing="" dimension\_margin\_medium="" dimension\_margin\_small="" margin\_top="" margin\_bottom="" padding\_medium="" padding\_small="" padding\_top="" padding\_right="" padding\_bottom="" padding\_left="" hover\_type="none" border\_sizes="" border\_color="" border\_style="solid" border\_radius="" box\_shadow="no" dimension\_box\_shadow="" box\_shadow\_blur="0" box\_shadow\_spread="0" box\_shadow\_color="" box\_shadow\_style="" background\_type="single" gradient\_start\_color="" gradient\_end\_color="" gradient\_start\_position="0" gradient\_end\_position="100" gradient\_type="linear" radial\_direction="center center" linear\_angle="180" background\_color="" background\_image="" background\_image\_id="" background\_position="left top" background\_repeat="no-repeat" background\_blend\_mode="none" animation\_type="" animation\_direction="left" animation\_speed="0.3" animation\_offset="" filter\_type="regular" filter\_hue="0" filter\_saturation="100" filter\_brightness="100" filter\_contrast="100" filter\_invert="0" filter\_sepia="0" filter\_opacity="100" filter\_blur="0" filter\_hue\_hover="0" filter\_saturation\_hover="100" filter\_brightness\_hover="100" filter\_contrast\_hover="100" filter\_invert\_hover="0" filter\_sepia\_hover="0" filter\_opacity\_hover="100" filter\_blur\_hover="0" last="no" border\_position="all"][fusion\_text columns="" column\_min\_width="" column\_spacing="" rule\_style="default" rule\_size="" rule\_color="" content\_alignment\_medium="" content\_alignment\_small="" content\_alignment="" hide\_on\_mobile="small-visibility,medium-visibility,large-visibility" sticky\_display="normal,sticky" class="" id="" font\_size="" fusion\_font\_family\_text\_font="" fusion\_font\_variant\_text\_font="" line\_height="" letter\_spacing="" text\_color="" animation\_type="" animation\_direction="left" animation\_speed="0.3" animation\_offset=""]effekt faktor: med vekselstrøm er den optagne (eller tilsyneladende) effekt (kva) af en induktiv belastning er større end den aktive effekt (kw) brugt ved beregningen.

cos phi = aktiv effekt / tilsyneladende effekt.

#### eksempler:

a. resistive belastninger som glødelamper og varmelegemer: cos phi = 1

b. induktiv belastninger:

elektrisk håndværktøj: cos phi ~ 0,97  
el-motor: cos phi = 0,7 – 0,8  
lysstofrør, svejse transformer: cos phi ~ 0,5

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