Harmonicabsorptionfiltersareusedwhenitisnecessarytoreducetheharmonicvoltageandcurrentdistortioninthesupplysystem.Absorptionfiltersareformedbycapacitorsconnectedinserieswithreactors,tunedtothefrequencyoftheharmonictobesuppressed.FiltersareassembledinmetalcabinetsofLFtypeandincludecontactorsandhighrupturecapacityfusesforshortcircuitprotection.Thermalprotectionofthefilterisachievedbymeansofthermalsensorslocatedinthecoreofthereactors.Ejemplodefiltrocombinado/Exampleofcombinedfilter:350kvar400V50Hz,+70A250Hz,+50A350Hzcaracterísticastécnicas/teChniCalCharaCteristiCs•Tensiónnominal/Ratedvoltages......230,400,415,480V•Frecuenciadered/............................50Hz(60Hz)Networkfrequency•Sintonizaciónfiltros/Filtertuning.....5º,7º,11º,13º•Regulación/Regulation......................porcorrienteoporarmónicos/bycurrentorbyharmonics•Gradodeprotección/......................IP20Degreeofprotection•C***trucción/C***truccion................Armariometálico/Metalcabinet•Colorarmario/Cabinetcolour........Gris/GreyRAL7035•Instalación/Installation......................Interior(sobresuelo)/Indoor(floormounting)•Normas/Standa***............................IEC60831,IEC60439,IEC6164250Hz400VArmónicoabsorbidoAbsorptionFiltertuningIarmónicamax(A)MaximumharmoniccurrentQN(kvar)Irms(A)5º,7º,11º,13º4020,0505º,7º,11º,13º8041,0100escalonesestándar/standardsteps)