SELECTION
Thermal power rating
AIR COOLED CONDENSER DRIVES
P
tn
for gear unit
without forced cooling
factor a for ambient temperature without forced cooling
Reduction
Ratio
Ambient temperature in °C
15 to 25 25 to 35 35 to 45
6,3 11,2
12,5 18
Size
1
1
0,81
0,85
1
DA FX
0,87
DA FX
0,68
0,71
0,55
0,66
0,75
DA DX
0,74
EA FX
OK
Thermal check
Pa P
tn
a b c ?
Cooling fan possible
No forced cooling
required
P
tf
for gear unit
with 1 fan
Pa P
tf
d b ?
One fan
factor b for duration of service
h/year
3
h/day (max)
10 >16
1000
2000
4000
Size
1,2
-
1,3
-
-
DA DX
-
EA FX
1,15
1,1
1,2
1,1
-
DA DX
-
EA FX
1,15
1,1
1
DA FX
factor d for ambient temperature with forced cooling
Number of
stages
Ambient temperature in °C
15 to 25 25 to 35 35 to 45 45 to 55
with forced
cooling
2 1 0,86 0,72 0,59
Reference Data
OK
factor c for air circulation (without fan)
Mounting
Indoors
- small enclosure
Air flow
0,73 0,70
Indoors
- normal working areas
Outdoors
- protected against sun
Size
1
1,33
DA DX
1
1,36
EA FX
P
t
P
tn
, P
tf
for
see p.
A42
P
t
- -
-
Ratio
P V P 2U - ACC - U D N
Size
E
A6
Air flow to be selected according to the structure:
Open structure: gear units installed in an open steel frame structure
allowing the cooling tower air flow to pass over the gear unit's housing.
Closed structure: gear units installed on a solid concrete plinth or enclosed
steel frame. This structure prevents the cooling tower air flow from passing
over the gear unit's housing.
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