Serie RD Page 15

Gearboxes Series RD

100

SERVICE FACTOR of the motor

The specifications of various duty types are defined by the Stand-
ard CEI EN 60034-1 / IEC34-1

S1 Continuous duty

The specifications of various duty types are defined by the Stand-
ard CEI EN 60034-1 / IEC34-1

fs =1.0

N =

Operation

time

c =

Load

t =

Temperature

S3 Periodic intermittent duty

Operation according to cycle (C) including steady load time (N)
and rest time (R).
Starts/stops do not affect temperature.
The reference cycle (C) is up to a total of 10 minutes. Intermit-
tence ratio is calculated as follows

60%

fs = 0.90

40%

fs = 0.85

25%

fs = 0.75

15%

fs = 0.70

N =

Operation

time

R =

Rest

time

C =

Duty

cycle

Service factors