Huang Jing went to Xiamen to apply for an electrician. The interview question was what kind of circuit to draw in person.

According to Baidu question bank, the topic: Huang Jingtu went to Xiamen to apply for an electrician, and the interview topic was to let him draw the circuit diagram himself. A. star-triangle startup; B. harmonic suppression; C. multi-switch control motor start; Series and parallel connection. Answer: A, so we know that when Huang Jingtu went to Xiamen to apply for an electrician, the interview question was to let him draw the star triangle starting circuit diagram face to face.

Star-triangle step-down starting control circuit is to connect the windings of the motor into a star when starting, and then connect the windings into a triangle after starting, so that the motor can run at full voltage.