Furthermore what is contactor. 7 S6 S10 S12 3RA19 54-2A 002 Repeat coil terminal 1 set 3RT20 4 S3 for coil terminals A1 and A2 for reversin...

There are three ways to show electrical circuits. They are wiring, schematic, and pictorial diagrams. The two most commonly used are the wiring diagram and the schematic diagram.