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...Islamic university of gaza programmable logic controller lab faculty engineering electrical department eng mohammed s jouda experiment star delta starter ats objectives after successfully completing this laboratory you will be able to start the three phase induction motor via connection using plc build self starting system for generators motors overview semi automatic and fully starters require contactors connect windings first in then power circuit diagram showing scheme is given fig a whenever one has make connections it advantageous draw winding as shown right hand side helps remember that finishing end connected other figure supply at junctions now let us refer diagam sequence operation follows contactor close main m lastly open d when closed terminals b c get together through contacts thus reaches therefore are energised should before if gets while still on dead short takes place outgoing leads over load relay taken care by providing interlocking auxiliary between opens closes run...