Sumitomo Hansen P4 - Thermal power rating

SELECTION
Thermal power rating
COOLING TOWER DRIVES
P
tn
for gear unit
without forced cooling
factor a for ambient temperature without forced cooling
Reduction
Ratio 15 to 25
Ambient temperature in °C
25 to 35 35 to 45
6,3 11,2
12,5 18
Size
1
1
0,81
0,85
1
Z H
0,87
Z H
0,68
0,71
0,55
0,66
0,75
Z D
0,74
E H
OK
Thermal check
Pa P
tn
a c e ?
Cooling fan possible
No forced cooling
required
P
tf
for gear unit
with 1 fan
Pa P
tf
d e ?
One fan
Reference Data
OK
P
t
P
tn
, P
tf
for
see p.
B47
P t
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
Z D
1
1,36
E H
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
factor e for relative air humidity
Relative air humidity
< 100% = 100%
1 1,15
E
- -
Ratio
Q V R 2 - C U N
Size
/
= standard gear unit (no code)
L
X
=
=
extended bearing housing (sizes Z, A, B)
intermediate size
B6
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.