How can the operating voltage of an insulator be determined?

The operating voltage of an insulator is primarily determined by the number of layers it has. Each layer of the insulator adds to its overall resistance to electrical breakdown, which allows it to withstand higher voltages without failing. Insulators are often designed with multiple layers to enhance their performance, allowing them to handle specific voltage ratings safely.

While other factors such as the length of the insulator, type of material, and height can influence its overall characteristics and application, the number of layers directly correlates with the insulator's capacity to handle electrical stress. More layers typically mean a greater safety margin against electrical breakdown, making this attribute a crucial determinant in evaluating the insulator's operating voltage.