Siemens SIMOTICS S-1FT2 User Manual

Graphic display of the derating factors
Figure3-3 Example of a derating factor
Reduction factors for the DC link voltage depending on the installation altitude
The voltage strength of the motor insulation is reduced for installation altitudes exceeding 2000
m above sea level. Check whether it is necessary to limit the DC link voltage.
Reduce the permissible DC link voltage with increasing installation altitude due to the
decreasing air pressure.
Table 3-3 Limit values for the permissible DC link voltage for 1FK2/1FS2/1FT2 motors at installation
altitudes less than 2000m above mean sea level
Motors with the following rated speed in the ar‐
ticle number (part number)
1F☐2☐☐☐-☐☐X☐☐..., X =
Max. permissible converter DC link voltage in V
G 375
B, C, E, F, H, K 720
Reduce the DC link voltage according to the reduction factors in the table below.
Table 3-4 Reduction factors of the permissible DC link voltage depending on the air pressure
Installation altitude above sea
level in m
Air pressure in hPa Reduction factor
2000 784 1
3000 689 0.887
Description of the motors
3.1Technical characteristics and ambient conditions
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 12/2023, A5E50610821B AF 33

Siemens SIMOTICS S-1FT2 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FT2
Category	Engine
Language	English