Siemens SIMODRIVE 611 Configuration Manual page 13

Thermal limiting characteristic
In the diagram this corresponds to the S1 (100 K) characteristic. Also in intermittent duty, the
geometrical average must not exceed this value.
Figure 1-3
P = Load
P = Electrical losses
V
t = Time
T = Duty duration 10 min (if not otherwise specified)
C
Δt = Operating time with constant load
P
Δt = Standstill time with windings in the no-current state
R
Relative power-on duration = Δt
General Section for Synchronous Motors
Configuration Manual, (PJAL), 11.2005 Edition, 6SN1 197-0AD07-0BP4
Periodic intermittent duty - duty type S3
/T = 25%, 40%, 60%
P C
Electrical Data
1.1 Definitions
1-3