Engineers who are good at handling high voltage are in high demand from the industries. On the other hand, the students who have experience dealing with high voltage are becoming rare. High voltage engineering is based on the basics of electrical engineering, for instance, electromagnetics and electrical circuits. Even complicated phenomena at high voltage can often be clarified by analogy with an equivalent electrical circuit model. In this paper, we constructed a high-voltage education tool as a subject of the tracking phenomenon of the insulator surface. The phenomena were replaced with the electrical circuit model, and a simple numerical analysis was performed using the circuit model. The educational tool was used for high school and university students. In the test conducted before the lecture, about 40% of the students were able to replace the tracking phenomenon with the electrical circuit model. After the lecture, the questionnaire results showed that the experiment helped understand the phenomenon, but there were small barriers to the replacement with the electric circuit model. According to the comments from the students, it is inevitable that the electric circuit model has improved the understanding.