What you mean is how to measure the insulation resistance of equipment or lines with a shaking table. Let me give you an example to answer your question. If you want to test the insulation of an insulating bushing of the distribution transformer, of course, you must first choose the voltage level of the shaking table, and then connect one wire of the shaking table to the conductor, that is, the electrode, and the other wire to the porcelain part of the bushing. Before this connection, you must take some measures to increase the contact area between the connection point and the porcelain column, such as simply wrapping the porcelain column with copper sheets and then connecting it to the vibrating table. All connections must be tight, high-voltage or large-capacity equipment.