Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 45)

Rockwell Automation Publication 7000-UM151E-EN-P - January 2013 45
Component Definition and Maintenance Chapter 3
Calculate the capacitance using the first reading. In this case:
Similarly, you can calculate the capacitance for the remaining two measurements
for L2-N and L3-N.
Converter Cabinet
Components
This section describes the converter cabinet components of your PowerFlex 7000
“B” Frame drive. It also details a number of regular or recurring maintenance tasks
that will keep your drive in peak operating condition.
For control/cabling cabinets, see Control / Cabling Cabinet Components on
page 23 .
For DC link/fan cabinets, see DC Link and Fan Cabinet Components on
page 88 .
V = 200V, I = 1.87 for L1-N
Xc = V/I = 200/1.87 = 106.95
C= 1/ (2
π F Xc)
C= 1/(2 x 3.14 x 50 x 106.95
C=29.7μ
F
Where:
F = frequency of the applied voltage.