Effective bus capacitance required for
VI-ARM, FARM, and ENMod holdup time
1
Minimum expected line voltage: 
  (90–132, 180–264)
Vac
Maximum expected load: W
Converter weighted average efficiency: %
2
AC line frequency (47–440): Hz
Design holdup time: 
  (min. + 1/2 line cycle)
 
ms
Energy expended:  J
Enter values for either a or b below.
a
 Min. required  ms
b
 Effective output bus capacitance:  µF
  
Effective output bus capacitance:  µF AC fail warning:  ms
Holdup capacitors (2 each, 200Vdc rating) µF Ride-through time:  ms
Expected bus ripple voltage:  V p-p Total holdup time:  ms
Recommended Vicor holdup box: 
(value of each capacitor, part number)
 (HUB)
Display results for HUB capacitors