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What should the DC bus measure on an ATV312H...N4?

How do I calculate/ determine the DC bus value ?  

Product Line:
Altivar 312

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.

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