Emerson Digitax ST - Page 175

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Digitax ST User Guide 175
Issue Number: 5
13.1.4 Repetitive profile with defined ratio between I
base
to I
peak
Figure 13-2 Repetitive profile with defined ratio between I
base
to I
peak
This is a profile with acceleration/deceleration periods where the peak output current from the drive (I
peak
) is given as a proportion of the base current
(I
base
) for a defined period of time. (T
peak
).
For example accelerating/decelerating for 10 s with a current of 2.0 x I
base
.
The ratio between accelerating/decelerating period (T
peak
) and the total profile period (T
duty
) is always 1:10.
The profile shows the highest I
base
ratings possible for the given I
peak
/I
base
ratio.
Table 13-5 Repetitive profile with defined ratio between I
base
to I
peak
at 6 kHz switching frequency, ≤230 Vac supply for DST120X and ≤400
Vac supply for DST140X
Table 13-6 Repetitive profile with defined ratio between I
base
to I
peak
at 8 kHz switching frequency, ≤230 Vac supply for DST120X and ≤400
Vac supply for DST140X
Model
I
n
Overloads
1.5 x I
base
for 60 s 1.75 x I
base
for 40 s 2.0 x I
base
for 10 s 2.5 x I
base
for 2 s 3.0 x I
base
for 0.25 s
I
base
I
peak
I
base
I
peak
I
base
I
peak
I
base
I
peak
I
base
I
peak
A
DST1201 1.7 1.7 2.6 1.7 3.0 1.7 3.4 1.7 4.3 1.7 5.1
DST1202 3.8 3.8 5.7 3.8 6.7 3.8 7.6 3.8 9.5 3.8 11.4
DST1203 5.4 5.4 8.1 5.4 9.5 5.4 10.8 5.4 13.5 5.4 16.2
DST1204 7.6 7.6 11.4 7.6 13.3 7.6 15.2 7.6 19.0 7.6 22.8
DST1401 1.5 1.5 2.3 1.5 2.6 1.5 3.0 1.5 3.8 1.5 4.5
DST1402 2.7 2.7 4.1 2.7 4.7 2.7 5.4 2.7 6.8 2.7 8.1
DST1403 4.0 4.0 6.0 4.0 7.0 4.0 8.0 4.0 10.0 4.0 12.0
DST1404 5.9 5.9 8.9 5.9 10.3 5.9 11.8 5.9 14.8 5.9 17.7
DST1405 8.0 8.0 12.0 8.0 14.0 8.0 16.0 8.0 20.0 8.0 24.0
Model
I
n
Overloads
1.5 x I
base
for 60 s 1.75 x I
base
for 40 s 2.0 x I
base
for 10 s 2.5 x I
base
for 2 s 3.0 x I
base
for 0.25 s
I
base
I
peak
I
base
I
peak
I
base
I
peak
I
base
I
peak
I
base
I
peak
A
DST1201 1.7 1.7 2.6 1.7 3.0 1.7 3.4 1.7 4.3 1.7 5.1
DST1202 3.8 3.8 5.7 3.8 6.7 3.8 7.6 3.8 9.5 3.8 11.4
DST1203 5.4 5.4 8.1 5.4 9.5 5.4 10.8 5.4 13.5 5.4 16.2
DST1204 7.6 7.6 11.4 7.6 13.3 7.6 15.2 7.6 19.0 7.6 22.8
DST1401 1.5 1.5 2.3 1.5 2.6 1.5 3.0 1.5 3.8 1.5 4.5
DST1402 2.7 2.7 4.1 2.7 4.7 2.7 5.4 2.7 6.8 2.7 8.1
DST1403 4.0 4.0 6.0 4.0 7.0 4.0 8.0 4.0 10.0 4.0 12.0
DST1404 5.9 5.9 8.9 5.9 10.3 5.9 11.8 5.9 14.8 5.9 17.7
DST1405 8.0 7.2 10.8 7.2 12.6 8.0 16.0 8.0 20.0 8.0 24.0
I
peak
Current (A)
T
peak
T
duty
I
Max
Speed
Time
Time