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  1. ing001

    Setting Time Delay on Automatic Star-Delta Starter

    I know that when the motor has reached 80%-85% of the synchronous speed, it can be switched from star to delta. I also know that this moment can be determined using a clamp ammeter on the supply lines from the main contactor. Will someone describe how this is done if, say, the motor is rated 7.5KW ?

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