(3)用一個單相插頭取一根線接在控制端子排的“c”端子上，另一頭的兩相插在接線盒上(老機型一根線接在“c”上，另一根線接在“d”上)，合上阻隔開關閘刀，變頻器應能送上控制電，面板上閃現“43.21”過幾秒鐘“pro”燈亮(新機型)，或只需“pro”燈亮(老機型)，若不閃現可將插頭反過來從頭插一下即可。
(4)面板閃現正常后，可查看變頻器的控制功用是不是正常。用萬用表查看延時可控硅兩端的電壓(即延時電阻上的電壓)，應在1.00v左右。將變頻器的“開/停機”開關打在“開機”方位，變頻器應能開機，調度“頻率調度”旋扭，變頻器頻率應從“2.00”升至“50.00”。用萬用表測量變頻器的三相輸出端子(這時應從變頻器一側測量，因柜子并沒有接通主電，變頻器的主接觸器沒有吸合)，三相電壓應互相平衡，對中線也應互相平衡。電壓大致是2300v等級的三相電壓為15v左右，對中線為10v左右;1140v等級的三相電壓為9v左右，對中線為5v左右。若不平衡，應查看柜子在運輸進程中有無掉線或其他疑問，直至電壓完全平衡間斷。
(5)工作參數的設定。這包括變頻器參數和電機維護儀參數的設定兩步。
變頻器參數的設定。因變頻器出廠時通常是按2300v/125kw或1140v/75kw而計劃的，因而應根據現場負載的懇求從頭設定，包括額外電流、過載維護電流，其他參數通常不需求修改。
電機維護儀的參數設定。電機維護儀的參數包括欠載電流、過載電流、欠壓設定、過壓設定等。這兒說明一下。因潛油電泵是深置于油井下油層里的電泵，在工作中靠油的循環來散熱。一旦井供液短少，電機將脫離油層工作，電機將干轉，這么就很簡略焚毀電泵。因而應設定欠載維護，當工作電流低于額外電流的80%時，就間斷電機的工作，起到維護電機的作用。
參數的設定方法可參照相應的說明書進行，主要有兩種，bk-3型和bk—j1型。
bk—3型的方法是：在閃現器閃現“p”(剛送電或按四次“上檔”鍵)時，可對參數值進行修改。根據需求的數值，按相應的數字鍵，再按“上檔”或“下檔”鍵，最終按相應的功用鍵，即可結束參數值的修改。

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