Programming with ladder logic

In this program when Accum. is ON on 70 sec after that DN is enable and M3 delta contactor ON but after that in Rung 0001 M3 delta contactor why disable, that should be Enable/ ON

I think you were correct but I have an that query so tell me why Rung 0001 M3 is off when Rung 0002 M3 is on

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In this program, the M3 delta contactor is normally closed, when Accum. reaches to 70 sec after that DN becomes high and Rung 0001 M3 delta contactor becomes normally open.
Hence due to this M2 star will be off and enable the system to run in delta connection.

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