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How do I calculate/ determine the DC bus value ?
All Altivar models and serial numbers
Input rectifiers or DC bus have failed
The value of the DC bus voltage is dependant on the supply voltage. The DC bus voltage should be approximately the value of the peak line supply voltage. Example: if the line supply voltage measures 480vac (RMS) then the DC bus will be 480 X 1.414 or approximately 678vdc.