Derating Factors; Structure Of The Article Number - Siemens SIMOTICS S-1FK2 Operating Instructions Manual

2.3

Derating factors

With ambient temperatures > 40 °C or installation altitudes > 1000 m above sea level, the
permissible S1-characteristic must be reduced in speed and torque:
Table 2- 3
Installation altitude above sea
Calculate the derating factor for ambient temperatures that are not shown here and installation alti-
tudes below the maximum values by interpolating. For example: 40 °C at 1500 m above sea level
= derating factor 0.965.
Calculate the reduced S1 line as follows:
S1
red
S1
red
S1
40 °C; 1000 m
n
x
d
2.4

Structure of the article number

The article number describes the motor with the following structure.
Figure 2-1
SIMOTICS S-1FK2 synchronous motors for SINAMICS S120
Operating Instructions, 06/2019, A5E46089564B AB
Derating of speed and torque depending on the installation altitude and ambient temper-
ature
level in m
1000
2000
(n) = x • S1 (n / x
d 40 °C; 1000 m
reduced S1 characteristic curve for motor torque at required altitude and
ambient temperature
S1 characteristic specified for ambient temperature of 40 °C at 1000 m
above sea level (see Chapter "Datasheets and characteristics" in Configura-
tion Manual)
motor speed
derating factor from the table above
Article number structure for 1FK2
Ambient temperature in °C
30 40
1.08 1.00
1.02 0.93
)
d
Description of the motors
2.3 Derating factors
45 50
0.96 0.91
0.89 0.84
25