三倍(bei)頻(pin)(pin)是為了滿足GB1094.3—85、GB1207和(he)電氣(qi)設備預防性試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)規程(cheng)—1995中三倍(bei)頻(pin)(pin)感(gan)(gan)應(ying)耐壓(ya)(ya)(ya)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)和(he)局放試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)而設計。 變(bian)壓(ya)(ya)(ya)器(qi)、互感(gan)(gan)器(qi)感(gan)(gan)應(ying)耐壓(ya)(ya)(ya)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)是檢驗(yan)(yan)(yan)該產品是否(fou)(fou)符合(he)國家(jia)標準(zhun)的一項重要試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)。繞(rao)組(zu)的層間(jian)、匝間(jian)、段及相間(jian)絕緣的縱絕緣感(gan)(gan)應(ying)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)，是考驗(yan)(yan)(yan)繞(rao)組(zu)是否(fou)(fou)符合(he)要求的一個重要項目。為了提高繞(rao)組(zu)試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)電壓(ya)(ya)(ya)，使變(bian)壓(ya)(ya)(ya)器(qi)或(huo)互感(gan)(gan)器(qi)的鐵芯又(you)不致于過(guo)飽和(he)導致勵磁電流過(guo)大(da)，因此要使試(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)頻(pin)(pin)率(lv)提高，一般為100Hz—4