Description
2.2 Technical features and ambient conditions
Naturally cooled 1FW6 built-in torque motors
Operating Instructions, 07/2017, 6SN1197-0AF02-0BP2
31
2.2.5
Ambient conditions for fixed operation
You can classify the ambient conditions for stationary use at weatherprotected locations
according to the standard DIN IEC 60721-3-3. The environmental effects and their limit
values are defined in various classes in this standard.
With the exception of "Low air temperature" and "Low air pressure" ambient parameters, you
can assign the motors to climatic class 3K3.
Table 2- 2
Ambient conditions are based on climate class 3K3
Ambient parameter
Unit
Value
a) Low air temperature
°C
- 5
b) High air temperature
°C
+ 40
c) Low relative humidity
%
5
d) High relative humidity
%
85
e) Low absolute humidity
g/m
3
1
f)
High absolute humidity
g/m
3
25
g) Rate of temperature change
1)
°C/min
0.5
h) Low air pressure
4)
kPa
78.4
i)
High air pressure
2)
kPa
106
j)
Solar radiation (insolation)
W/m
2
700
k) Thermal radiation
-
-
l)
Air movement
3)
m/s
1.0
m) Condensation
-
Not permissible
n) Wind-driven precipitation
(rain, snow, hail, etc.)
-
-
o) Water (other than rain)
-
See degree of
protection
p) Formation of ice
-
-
1)
Averaged over a period of 5 min
2)
Conditions in mines are not considered.
3)
A cooling system based on natural convection can be disturbed by unforeseen air movements.
4)
The limit value of 78.4 KPa covers altitudes up to 2000 m.
Additional ambient conditions applicable for the motors for stationary use at weather-
protected locations according to standard DIN IEC 60721-3-3 include.
Mechanically active ambient conditions
Class 3S1
Mechanical ambient conditions
Class 3M3
