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BECAREOFRCDAMPCIRCUIT

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thequalityofresistoristoopoor.whattypearetheresistors?Carbontypeisbetterthanmetaloxidetypeintermofvoltagewithstanding.Youcanconsidertoselect"metalgrace"type,whichcostishigh.

Thesafetytestvoltageisrelatedtothepowerworkingvoltage.Regardingtheexactsafetytestvoltageandrequirementofclearance/creepage,youcanrefertoIEC60950.

Normally,apply1.5kvtoprimaryandprotectionground,andapply3kvAC(or4242VDC)toprimaryandsecondary.Youneedchecktheclearanceorcreepagebetweenprimary(L&Nshort)andprotectiongroundshouldbemorethan3mm,andtheclearanceorcreepagebetrweenprimary(L&Nshort)andsecondary(alloutputshort)shouldbemorethan6mm.4.5KvisACorDC?

Prettygood!thankyouall!