Ladder diagram for Automatic star-delta starter:
Inputs:Start switch- I:0/0 Stop Switch- I:0/1 Overload: I:0/2
Outputs:Main Contactor- O:0/0 Start Contactor- O:0/1 Delta Contactor- O:0/2
Timer: Star-Delta Timer- T4:0 (On Delay)

OR

OR

Ladder diagram for Automatic star-delta starter:
Inputs:Start switch- I:0/0 Stop Switch- I:0/1 Overload: I:0/2
Outputs:Main Contactor- O:0/0 Start Contactor- O:0/1 Delta Contactor- O:0/2
Timer: Star-Delta Timer- T4:0 (On Delay)



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