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UTD.123.2019-10.00_EN
Tab. 7.16.3 - Thermal factor
ft
2
according to
ambient temperature
and
service
Tab. 7.16.4 - Thermal factor
ft
4
according
to
altitude of installation
Maximum
ambient
temperature
°C
ft
2
Altitude a.s.l.
ft
4
Continuous
duty
Intermittent load duty
S3 ... S6
Cyclic duration factor [%]
for 60 min running
1)
S1
60
40
25
15
m
60
0.6
0.71
0.8
1
0.95
0
÷
1 000
1
50
0.8
0.95
1.06
1.25
1.32
1000
÷
2 000
0.95
40
1
1.18
1.32
1.5
1.7
2000
÷
3 000
0.9
30
1.18
1.4
1.6
1.8
2
3000
÷
4 000
0.85
20
1.32
1.6
1.8
2
2.24
10
1.5
1.8
2
2.24
2.5
Tab. 7.16.5 - Thermal factor
ft
5
according to cooling
air speed
on gear reducer housing
Air speed
m/s
Installation environment
ft
5
< 0.63
very small environment or without air movements or with protected gear reducer
consult us
0.63
small environment and with limited air movements
0.71
1
wide environment without air movements
0.9
1.25
wide environment with light air movements (e.g. gearmotor with self-cooled motor
1
2.5
open and colled
1.18
4
with heavy air movements
1.32
Tab. 7.16.6 - Thermal factor
ft
ATEX
according to
ATEX gear reducer design
Series
2G, 2D
3G, 3D
A
,
E
,
G
,
H
,
EP
0.8
0.9
(0,71 for train of gears I, CI)
(0,6 for train of gears 2EB ... 6EB)
(0,8 for train of gears I and CI)
(0,6 for train of gears 2EB ... 6EB)
Duration of running on load [min]
60
·
100 [%]
1)
Содержание Rossi A Series
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