Maximum Voltage That Can be Applied to a Motor

D

d.alex

I was reading about 87Hz technique. I saw we can configure the drive for a motor 400Y/230D as 400V /87hz. I know v/hz ratio should be kept constant and when we configure drive as 400V and 87 Hz and wire it delta this ratio is still constant. But there will be 1.7 times more voltage applied to motor windings. Is it ok for winding. Is there no risk of damaging insulation ? For example Can we apply 800V and 174 Hz to a motor without damaging assuming that we can source it?

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enter image description here

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enter image description here

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