SELV inomirira Kuchengetedza Kwakawedzera Kwakadzika Voltage. Mamwe maAcc-DC emagetsi emagetsi ekuisa magetsi ane yambiro nezveSELV. Semuenzaniso, panogona kunge paine yambiro nezve kubatanidza zvabuda zviviri zvakateedzana nekuti mhedzisiro yepamusoro inokwanisa kupfuura iyo yakatsanangurwa SELV yakachengeteka mwero, iri pasi kana yakaenzana ne60VDC. Pamusoro pezvo, panogona kunge paine yambiro nezvekudzivirira zviteshi zvekuburitsa uye mamwe ma conductor anowanikwa mune magetsi nemabutiro ekudzivirira kuti vasabatwe nevashandi vanoshanda kana netsaona kupfupiswa nechishandiswa chakadonhedzwa, nezvimwe.
UL 60950-1 inotaura kuti dunhu reSELV "idunhu repiri rakagadzirwa uye rakadzivirirwa zvekuti pasi pemamiriro ezvinhu akajairika uye asina kukwana, ma volts ayo haapfuure kukosha kwakachengeteka." "Sekondari yedunhu" haina hukama hwakanangana nesimba rekutanga (AC mains) uye inowana simba rayo kuburikidza neshanduki, chinoshandura kana chakaenzana choga mudziyo.
Mazhinji switchmode yakaderera voltage AC-DC magetsi emagetsi nezvinobuda kusvika ku48VDC zvinosangana nezvinodiwa neSELV. Iine 48V inoburitsa OVP yekumisikidza inogona kusvika pa120% yezita, iyo inobvumidza kubuda kuti kusvika 57.6V magetsi asati adzima; izvi zvichiri kuenderana nehurefu hwe60VDC yeSELV simba.
Uye zvakare, iyo SELV inoburitswa inowanikwa kuburikidza nekuzviparadzanisa nemagetsi neakaviri kana akasimbiswa kuputira pakati pekutanga uye sekondari divi revashanduri. Zvakare, kusangana neSELV maratidziro, iwo magetsi ari pakati pechero zvikamu zviviri zvinowanikwa / makondakita kana pakati pechimwe chete chinowanikwa chikamu / conductor uye pasi hazvifanirwe kupfuura kukosha kwakachengeteka, uko kunotsanangurwa se42.4 VAC yepamusoro kana 60VDC isingapfuure 200 ms panguva yakajairwa. mashandiro. Pasi pechikanganiso chimwe chete, iyi miganho inobvumidzwa kuenda kumusoro kusvika 71VAC yepamusoro kana 120VDC isingasvike makumi maviri ms.
Usashamiswe kana iwe ukawana mamwe magetsi emagetsi anotsanangudza SELV zvakasiyana. Tsananguro / tsananguro dziri pamusoro apa dzinoreva SELV sekutsanangurwa kwayakaitwa neUL 60950-1 uye nezvimwe zvinofambidzana zvine chekuita nemagetsi emagetsi.
Post nguva: Jul-20-2021