Habasit Rossi A Series, Operating Instructions Manual

Page: 47 / 120

47
UTD.123.2019-10.00_EN
Tab. 7.15.2 - Service factor fs
2
based on nature of load and of frequency of starting
Nature of load of driven machine
1)
fs
2
Ref. Description Frequency of starting z [starts/h]
A series
4 8 16 32 63 125 250 500
E , G series 2 4 8 16 32 63 125 250
H series 1 2 4 8 16 32 – –
EP series 2 4 8 16 32 63 125 -
a Uniform 1 1.06 1.12 1.18 1.25 1.32 1.4 1.5
b Moderate overloads (1,6 times the normal load) 1 1 1.06 1.12 1.18 1.25 1.32 1.4
c Heavy overloads (2,5 times the normal load) 1 1 1 1.06 1.12 1.18 1.25 1.32
Tab. 7.15.3 - Service factor fs
3
based on
motor type
Tab. 7.15.4 - Service
factor fs
4
based on
reliability level
Tab. 7.15.5 - Service factor fs
5
based on
output angular speed n
2
Motor type fs
3
Reliability level
5)
fs
4
Output speed fs
5
Description n
2
[min
-1
] serie G H series
Electric three-
phase motor
P
1

9,2 kW 1
Standard 1
560
÷
355 1.25 –
P
2
> 9,2 kW 1,06 4)
Average 1.25
355
÷
224 1.18 –
Electric three-
phase brake
motor
1.06
High 1.4
224
÷
140 1.12 1.18
140
÷
90 1.06 1.12
Hydraulic
1
90
÷
56 1 1.06
< 56 1 1
Internal
combustion
multi-cylinder 1.25
single-cylinder 1.5
Tab. 7.15.6 - Service factor fs
ATEX
according to gear reducer ATEX design
Gear reducer design fs
ATEX
A , E , G , EP series H series
2G, 2D 1.18 1.32
3G, 3D 1.06 1.18
1) For indication on the type of load of the driven machine according to the application, see Rossi technical catalogs.
2) In case of selection with
n
2
· L
h
use f s
1
= 1.
3) Verify that the torque M
2
is lower than or equal to M
N2
valid for n
1
<
90 min
-1
(s. Rossi technical catalogs); in presence of variable
load, verify for each interval of load cycle.
4) For Y-
Δ
starting, running with inverter or with «soft start» devices, f s
3
= 1.
5) Reliability degrees higher than normal are required in presence of very difficult maintenance, great importance of gear reducer
in the production cycle, safety,etc.