ABB FOCH Hardware Manual page 15

The total continuous rms current of the motors is
I = I + I + I
th th1 th2 th3
The supply voltage ( U
the drive is
U = 1.35 × U = 1.35 × 660 V = 891 V.
dc N
The additional energy loss in the d u /d t filter is
E = ½ · C · ( U 2
) = ½ × 463 nF × (891 V)
dc
When 463 A and 184 mJ are compared to the values of Maximum values table, it can
be seen that a filter of type FOCH0610-70 can be used.
= 463 A.
) is 660 V. Thus, the average intermediate circuit DC voltage of
N
2
= 184 mJ.
Selecting the d u /d t filter 15