Fels Mobilis ELITE, Manual, Page: 15 / 223

6. DUTY CYCLE FACTOR
The maximum permissible intensity in amperes depends on the maximum permissible ambient
temperature for the feeding rail considered, on the ambient temperature, on the duty cycle factor
(rate of equipment use over a short period), and on the Joule effect due to current carrying.
The duty cycle factor depends on the rate of equipment use, defined over ten-minute time periods
and expressed in %, corresponds to the ratio running time over total time. A duty cycle factor of
80% means that the machine will be used 8 minutes per each 10-minute period.
If the calculated nominal intensity is lower or equal to the permissible intensity for a selected duty
cycle factor at the maximum permissible ambient temperature, such intensity may be retained.
I
N

I
FM
An intensity lower than the nominal current may be retained if the requirements for voltage drop
upon start-up, nominal voltage drop, and duty cycle factor are met.
The higher the operating temperature, the lower the maximum permissible current.
ELITE Permissible current:
Ambient
temperature
Duty Cycle
Intensity
40A 60A 100A 130A 160A 200A
35°C 80% 72A 90A 117A 127A 162A 211A
40°C 80% 67A 86A 109A 117A 155A 195A
55°C 80% 48A 63A 86A 87A 131A 140A
35°C 100% 68A 85A 114A 120A 152A 184A
40°C 100% 64A 82A 106A 109A 145A 171A
55°C 100% 47A 61A 82A 83A 121A 126A
MOVIT Permissible current:
Ambient
temperature
Duty Cycle
Intensity
315A 450A 630A
35°C 80% 420A 540A 638A
40°C 80% 384A 496A 580A
55°C 80% 275A 345A 420A
35°C 100% 395A 500A 570A
40°C 100% 360A 460A 530A
55°C 100% 255A 320A 385A
Mobilis line calculation