因而要根據(jù)正本的供電電壓選擇適合的控制電源接線端子，將原出廠時(shí)空出的兩根接線或接在電壓最高端(出廠時(shí)按最高電壓試驗(yàn))的兩根線接在原電壓等級(jí)的端子上，因有兩個(gè)變壓器，都要進(jìn)行改接。如圖3示。
(2)接主線
按配線標(biāo)準(zhǔn)，將電源線接在變頻器的三相輸入(或符號(hào)r、s、t)端子上，電機(jī)線接在變頻器的三相輸出(或符號(hào)u、v、w)端子上，地線接在變頻器上標(biāo)有“⊥”的端子上。并將相應(yīng)的羅栓擰緊。
2.調(diào)試
(1)將柜門上的阻隔開關(guān)拉下，并將柜門上的“變頻發(fā)起”按扭旋開，使其呈斷開情況。提示送電后，用mf—47型或500型萬用表的高壓擋“2500v”檔測(cè)量三相輸入電壓(必定留心安全)，應(yīng)在規(guī)矩的計(jì)劃內(nèi)，并三相互相平衡，若不精確，應(yīng)停電查看供電電源。
(2)電源正常后，合上阻隔開關(guān)閘刀，用萬用表查看控制電源的220v電壓(測(cè)量里邊的接線插盒即可)是不是在規(guī)矩的計(jì)劃內(nèi)，按其±20%的動(dòng)搖，應(yīng)在220v±20v計(jì)劃內(nèi)，若超出此計(jì)劃，應(yīng)拉下高壓阻隔開關(guān)的閘刀，調(diào)整控制變壓器的接頭，直至滿足懇求間斷。
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