Habasit Rossi A Series, Operating Instructions Manual, Page: 48 / 120

48
UTD.123.2019-10.00_EN
7.16 - Thermal power verification Pt [kW] of gear reducer
The nominal thermal power Pt
N
of gear reducer, stated in the following tables, is that which can be applied
at the gear reducer input, without exceeding 95 °C 1) approximately oil temperature when operating in
following running conditions:
–
input speed n
1
= 1 400 min -1 ;
– mounting position B3 ;
– continuous duty S1 ;
– maximum ambient temperature 40 °C;
– maximum altitude 1 000 above sea level;
– air speed

1,25 m/s (typical value in presence of a gearmotor with self-cooled motor);
– maximum relative humidity 80 %.
Always verify that the power applied P 1 is lower than or equal to gear reducer thermal power Pt,: table
7.14.1a, table 7.14.1b) multiplied by corrective coefficients ft
1
, ft
2
, ft
3
, ft
4
, ft
5
, ft
ATEX
(stated in the tables 7.14.2
... 7.14.7) considering the different operating conditions:
P
1

Pt
N
· ft
1
· ft
2
· ft
3
· ft
4
· ft
5
· ft
ATEX
When thermal power is not stated in the tables, consider that the power has been already verified.
When the power applied is not constant and when the exact load cycle is given, it is possible, or advisable,
to calculate the equivalent power applied, according to the formula:
P
1th
=
1
η
P
3
21
.
t
1
+
P
3
22
. t
2
+
... + P
3
2i
. t
i
+ ... +
P
3
2n
. t
n
t
c
3
.
where:
� is the gear reducer efficiency (see ch. 6);
P
2i
[kW] is the power, referred to the gear reducer output, required in the time interval ti [s];
t
c
= t
1
+ t
2
+ ... + t
i
+ ... + t
n
is the total duration of load cycle [s].
In these cases choose factor ft
2
from the continuous duty column S1.
ATTENTION: in presence of at lease a load level with power P
2n
> P t, applied for a duration equal to or higher
than t
i
= 20 min, you have to consider this load level in the P
th
dimensioning.
Tab. 7.16.1a - Nominal thermal power Pt
N
of E , G, H series
Train of
gears
Pt
N
[kW]
E series 80, 81 100, 101 125, 126 140 160 180
2I 15 22.4 33.5 35.5 53 56
3I 11.2 17 25 26.5 40 42.5
Notes of pages 49, 50.
1) Corresponding to an average temperature of the external housing surface of approximately 85 °C; locally housing temperature
can achieve the oil temperature.
2) For bevel helical gear reducers and gearmotors with double extension high speed multiply Pt
N
by 0,85 .
3) For speed n
x
included between two stated values ( n
sup
, n
inf
), select the nearest lower value or interpolate:
P t
N @ n x
= ( P t
N @ n sup
- P t
N @ n inf
) · ( n
x
- n
inf
) / ( n
sup
- n
inf
) + P t
N @ n inf
4) For n
worm

90 min
-1
, consult us.
G series
40 50 63
64
80
81
100 125 140 160 180 200 225 250 280 320
321
360 400
401
I
– – 11.2 17 25 37.5 50 56 80 90 125 140 200 224 315 –
2I 3.35 5 7.5 11.2 17 25 28 37.5 42.5 60 67 95 106 150 170 236
3I 2.5 3.75 5.6 8.5 12.5 19 21.2 28 31.5 45 50 71 80 112 125 180
4I – – 4.25 6.3 9.5 14 – – – – – – – – – 132
CI
2)
3 4.75 7.1 10.6 16 23.6 31.5 35.5 50 56 80 90 125 140 200 –
ICI
2)
2.12 3.15 4.75 7.1 10.6 16 18 23.6 26.5 37.5 – – – – – –
C2I
2)
– – – – – – 21.2 28 31.5 45 50 71 80 112 125 180
C3I
2)
– 2.36 3.55 5.3 8 11.8 – – – – – – – – – 132
H series
4000, 4001 4500, 4501 5000, 5001 5600, 5601 6300, 6301 7101 8001
2I 236 265 375 425 530 630 900
3I 180 200 280 315 400 475 670
4I 132 150 212 236 300 365 500
CI
2)
224 315 – – – – –
C2I
2)
180 200 280 315 400 475 670
C3I
2)
132 150 212 236 300 355 500