Calculation of measurement results of conductor DC resistance and unbalance rate in national standard electric submersible pump unit

As we all know, there are four common step-down startup methods, including series resistance step-down startup in stator winding, star delta step-down startup, autotransformer step-down startup and extended delta step-down startup. This article introduces the control circuit of series resistance step-down start. We should all know that there are four common step-down start methods, including series resistance step-down start in stator winding, star delta step-down start, autotransformer step-down start and extended delta step-down start. This article introduces the control circuit of series resistance step-down start. We should all know that there are four common step-down start methods, including series resistance step-down start in stator winding, star delta step-down start, autotransformer step-down start and extended delta step-down start. This article will introduce the control circuit of series resistance step-down start