8
Operation
Duty cycles
Operating Instructions – MOVIPRO
®
PHE..B-A15-.1X0..B-00
70
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 op-
eration at constant load and a time at rest. Described by the relative cyclic duration
factor (cdf) in %.
t1
t2
t3
T
t1
t2
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.
23576855/EN – 10/2017