Siemens SIMOTICS S-1FT2, Руководство по эксплуатации

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Description of the motors
2.3 Derating factors
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 07/2021, A5E50610821B AB
27
2.2.6 Noise emission
WARNING
Hearing damage
Hearing damage may occur if the motor exceeds a sound pressure level of 70 dB (A) due to
the type of mounting or pulse frequency.
•
Reduce the sound pressure level by implementing sound damping and/or soundproofing
measures.
When operated in the speed range 0 to rated speed, 1FT2 motors can reach the following
measuring surface sound pressure level L
p
:
Table 2- 2 Sound pressure level
Cooling method Motor Measuring surface sound pressure level L
p
Naturally cooled 1FT2☐03
1FT2☐04
55 dB(A) + 3 dB tolerance
1FT2☐05
1FT2☐06
65 dB(A) + 3 dB tolerance
1FT2☐08
1FT2☐10
70 dB(A) + 3 dB tolerance
The motors are certified for a wide range of installation and operating conditions. These
conditions such as rigid or vibration-isolated foundation design influence noise emission,
sometimes significantly.
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 Derating of speed and torque depending on the installation altitude and ambient tem-
perature
Installation altitude above sea
level in m
Ambient temperature in °C
30 40 45 50
1000 1.08 1.00 0.96 0.91
2000 1.02 0.93 0.89 0.84
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.