Drive modules
188
3.
DRIVE MODULES
Modular drives
100
DDS
HARDWARE
Ref.1310
Load duty cycles
Load cycle S1
Continuous duty. Operation with constant load and long enough to achieve
thermal balance.
Load cycle S1 with current peak
Periodic intermittent duty. Succession of identical duty cycles each having
a period at constant maximum load and a period at constant rated load. In
this duty cycle, the overheating effect of the start-up current is negligible.
The 5% running factor means that for a 10 second cycle, it works at constant
current Imax (2xInom) for 0.5 seconds and at rated current (Inom) for 9.5
seconds.
Load cycle S6-40
Periodic uninterrupted duty cycle with intermittent load. Succession of
identical duty cycles, each with a running period under constant load and
another period without load. There is no rest period. The 40% running factor
indicates that for a 10 minute cycle, it works at constant current for 4 minutes
(I S6 -40%) and without load for 6 minutes (with magnetizing current = 0.7 x
rated current In)
.
F. H3/4
Load cycle S1.
F. H3/5
Load cycle S1 with current peak Imax.
F. H3/6
Load cycle S6-40.
I
t
0.5 s
10 s
Imax
IN
S1 cycle with Imax
current peak
I
t
Load cycle S6-40
4 min
10 min
0.7·IN
IN
I
S6-40
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