Siemens SIMOTICS L-1FN3 - Derating Factors

The following components and settings in󹪞uence the noise levels reached when built-in motors
are operational:
• Machine design
• Encoder system
• Bearing
• Controller settings
• Pulse frequency
As a result of unfavorable machine designs, con󹪝guration or system settings, measuring
surface sound pressure levels of over 70dB (A) can occur. You can obtain support on
the topics of "Application" and "Mechatronics" at Application & Mechatronic Support Direct
Motors (mailto: motor.support.motioncontrol@siemens.com).
3.2 Derating factors
For installation altitudes above 2000 m above sea level, reduce the voltage stress of the motors
according to table "Factors to reduce the maximum DC link voltage" (reciprocal values from EN
60664‑1 Table A.2).
Table 3-3 Factors to reduce the maximum DC link voltage
Installation altitude above sea level in m up to Factor
2000 1
3000 0.877
4000 0.775
5000 0.656
6000 0.588
7000 0.513
8000 0.444
Reducing the DC link voltage reduces the converter output voltage. The operating range in
the F‑v diagram is thus also reduced.
You can 󹪝nd the F‑v diagrams in the associated data sheet.
Operation in a vacuum is not permissible due to the low voltage strength and the poor
cooling.
Description
3.2Derating factors
Naturally-Cooled 1FN3 Linear Motors
38 Operating Instructions, 06/2023, A5E52220465B AB