SEW-Eurodrive MOVIPRO PHC21A-A075M1-E45C-C5 - Page 151

8
Operation
Duty cycles
Operating Instructions – MOVIPRO
®
PHC2.A-A..M1-E45C-C5
151
8.3 Duty cycles
8.3.1 Duty type S1
Continuous duty: Operation with a constant loading condition, the motor achieves a
thermal steady state.
P, ϑ
ϑ
max
S1
P
ϑ
t
2325833867
8.3.2 Duty type S2
Short-time duty: Operation at constant loading condition for a limited, given time fol-
lowed by a time at rest. The motor returns to ambient temperature during the rest
period.
P, ϑ
ϑ
max
S2
P
ϑ
t
2325835787
8.3.3 Duty type S3
Intermittent periodic duty: The switch-on sequence does not affect the temperature
rise. Characterized by a sequence of identical duty cycles, each including a time of
operation at constant load and a time at rest. Described by the relative cyclic duration
factor (cdf) in %.
t1
t
2
t3
T
t1
t
2
t3
T
P, ϑ
ϑ
max
S3
P
ϑ
t
2325831947
8.3.4 Duty types S4toS10
Intermittent periodic duty: The startup current affects the temperature rise. Charac-
terized by a sequence of identical duty cycles, each including a time of operation at
constant load and a time at rest. Described by the relative cyclic duration factor (cdf) in
% and the number of cycles per hour.
26596598/EN – 10/2020