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Inrush Current During The Transition Of Star-delta ?


eva9259

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It's not possible to do this without having motor current and torque vs speed curves and load torque vs speed curve for the driven machine.

 

Worst case conditions will be:

 

2 x current drawn just prior to transition

4 x torque produced just prior to transition.

 

The values are determined by motor and load characteristics and can vary quite considerably between installations.

 

Hoper that helps,

 

Regards,

GGOSS

 

 

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