If because of the faulty circuit the star and delta contactor close at the same time, would the overcurrent only flows through those two contactors or also the main contactor?
If both contactors are closed, all the phases are shorted with each other before motor winding , therfore huge curent flows while from mains side, it will see extra resistance of motor winding due to which very minor current flows but only main circuit breaker will protect complete circuit
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If because of the faulty circuit the star and delta contactor close at the same time, would the overcurrent only flows through those two contactors or also the main contactor?
If both contactors are closed, all the phases are shorted with each other before motor winding , therfore huge curent flows while from mains side, it will see extra resistance of motor winding due to which very minor current flows but only main circuit breaker will protect complete circuit
Your writing is covering part of what you are explaing.This doesn't allow one to see completely the diagram.