Experimental consideration of the electrostatically induced voltage generated when a charged body approaches a metal box and moves away from the box

Electrical equipment within a metal box may malfunction due to an electrostatically induced voltage. The voltage of the metal box is induced by the movement of a charged body, such as a charged human body. When the charged body approaches the metal box and moves away from the box, the induced voltage of the metal box generated by the movement of the charged body is experimentally studied in this work. In the experiments, the depth of a metal box is changed, and the result shows that the induced voltage of the metal box when the charged body moves away from the box is approximately -4 times the value of the induced voltage when the body approaches the box in this experimental condition. These results will be useful in designing electrical equipment capable of preventing equipment malfunction and failure.