I was told that the Robicon Gen 3 power cells do not use a pre-charge circuit for the DC Bus and they actually use the high impedance of their special pahse shifting, multi tap tansformer. Can anyone confirm or deny this? if so it will be the first VSD that I have seen to not use a pre-charge circit (resistor/swicth) to prevent high inrush currents upon powering up the dc bus capacitors.
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