ABB ACS800 Application Manual page 12

12
Example1
The DC buses of three converters ACS800-0004-5, 2.2 kW, R2; ACS800-0025-5,
18.5 kW, R3 and ACS800-0025-5, 18.5 kW, R3 are connected together. The input
terminals of the 2.2 kW converter are left unconnected. According to
when two R3´s are connected to the main supply, therefore P
P
out.tot
Example2
The DC buses of three converters ACS800-0050-5, 37 kW, R5; ACS800-0140-5,
110 kW, R6 and ACS800-0320-5, 250 kW, R8 are connected together. All three
converters are connected to the main supply. According to
and R6 are connected to the main supply and k = 0.6 when R6 and R8 are
connected to the main supply. The worst case is chosen for the calculations, i.e.
k = 0.6, therefore P
P
out.tot
Design
⋅
= 18.5kW + 0.5 18.5kW
is
out.tot
⋅
= 37kW + 0.6 110kW
= 27.75kW
⋅
+ 0.6 250kW = 253kW
Table 1, k = 0.5
is
out.tot
Table 1, k = 0.7 when R5