Why is the shorting contactor smaller then the other two?

We are trying to change a motor from a two speed motor to a wye delta. the motor was a 8 pole y switched to 4 pole y then to a 4pole yy .we have rewound the motor but we are seeing the same current at the shorting contactor as the wye? is it rewound wrong? we do see the current drop after two min like normal.  
asked 6/19/2012

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