(3)用一个单相插头取一根线接在控制端子排的“c”端子上，另一头的两相插在接线盒上(老机型一根线接在“c”上，另一根线接在“d”上)，合上阻隔开关闸刀，变频器应能送上控制电，面板上闪现“43.21”过几秒钟“pro”灯亮(新机型)，或只需“pro”灯亮(老机型)，若不闪现可将插头反过来从头插一下即可。
(4)面板闪现正常后，可查看变频器的控制功用是不是正常。用万用表查看延时可控硅两端的电压(即延时电阻上的电压)，应在1.00v左右。将变频器的“开/停机”开关打在“开机”方位，变频器应能开机，调度“频率调度”旋扭，变频器频率应从“2.00”升至“50.00”。用万用表测量变频器的三相输出端子(这时应从变频器一侧测量，因柜子并没有接通主电，变频器的主接触器没有吸合)，三相电压应互相平衡，对中线也应互相平衡。电压大致是2300v等级的三相电压为15v左右，对中线为10v左右;1140v等级的三相电压为9v左右，对中线为5v左右。若不平衡，应查看柜子在运输进程中有无掉线或其他疑问，直至电压完全平衡间断。
(5)工作参数的设定。这包括变频器参数和电机维护仪参数的设定两步。
变频器参数的设定。因变频器出厂时通常是按2300v/125kw或1140v/75kw而计划的，因而应根据现场负载的恳求从头设定，包括额外电流、过载维护电流，其他参数通常不需求修改。
电机维护仪的参数设定。电机维护仪的参数包括欠载电流、过载电流、欠压设定、过压设定等。这儿说明一下。因潜油电泵是深置于油井下油层里的电泵，在工作中靠油的循环来散热。一旦井供液短少，电机将脱离油层工作，电机将干转，这么就很简略焚毁电泵。因而应设定欠载维护，当工作电流低于额外电流的80%时，就间断电机的工作，起到维护电机的作用。
参数的设定方法可参照相应的说明书进行，主要有两种，bk-3型和bk—j1型。
bk—3型的方法是：在闪现器闪现“p”(刚送电或按四次“上档”键)时，可对参数值进行修改。根据需求的数值，按相应的数字键，再按“上档”或“下档”键，最终按相应的功用键，即可结束参数值的修改。

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