How to see the universal transfer switch? Universal transfer switch graphic symbol and text symbol Universal transfer switch is a multi-loop electrical component with multiple gears and multi-stage (with multiple pairs of contacts), mainly used for circuit conversion. It can also be used for starting, reversing and speed regulation of small capacity motors. Universal transfer switch graphic symbol and text symbol In the electrical schematic diagram, the graphic text symbol of the universal transfer switch is SA. In order to more clearly show the positional relationship between the contact switching state of the universal transfer switch and the operating handle, the graphic symbol of the universal transfer switch and the contact closing table are often used in the electromechanical control system diagram.