GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 248)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
120
Diagram
= 0.75
for05
Base current
I
dAN
82 A
110 A
=
This means that the diagram for the converters 110 A ... 185 A with a Base current = 75
% has to be considered for the calculation.
Operating point Basis: rated data of the converter
Overload current = 82A . 1.8 = 147.6A
for06
= 1.34
for07
Overload current
I (of converter)
d A N
147.6 A
110A
= Overload factor =
= 0.16
for08
Overload time
Pause time + Overload time
1s
5s + 1s
=
1 s
Base current = 75 % I
2,00
1,75
1,50
1,25
1,00
Overload
curren
t/
I dAN
dAN
0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
Overload time / (Pause time + Overload time)
Overload time
Figure 6.14.6.3: Example- Operating point of drive
The calculated operating point is below the corresponding curve for an overload time of 1 s. Therefore the con-
verter is suitable for the application. The following two settings are possible:
Full load curr 82 A or 110 A
Enable overload Enabled
Overload current 180 % or 134 %
Base current 100 % or 75 %
Overload time 1 s
Pause time 5 s
n
ote
! The percentages for Overload current and Base current are referred to Full load curr and
not to the converter rated current!