Parker ViX250AH, User Manual

Page: 35 / 131

3. ELECTRICAL INSTALLATION 29
Plots of I
2
t Against Drive Current
The following graphs plot drive current against I
2
t time in seconds for a moving and
stationary motor for both power versions of the drive.
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10 11 12 13 14 15 16 17 18 19 20 0
Time to trip I
2
t circuit in seconds
ViX250 I
2
t function - moving
V
iX250 demanded phase current in
A
rms
Figure 3-11.ViX250 I
2
t function - moving
0
1
.2
2
.4
3
.6
4
.8
5
1
6
1.2
7
1.4
8
1.6
9
1.8
10
2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 0
Time to trip I
2
t circuit in seconds
ViX250 I
2
t function - stationary
V
iX250 demanded phase current in
A
rms
Figure 3-12.ViX250 I
2
t function - stationary