13
ELECTRIC WIRE ROPE HOIST
XM SERIES
2. DESCRIPTION OF THE HOIST/TROLLEY
For hoists that rarely lift
the maximum load and
mainly reduced loads.
For hoists lifting
approximately the
same ratio maximum,
medium and reduced
loads.
For hoists that
frequently lift the
maximum load and
normally medium loads.
For hoists that regularly
lift loads near the
maximum value.
Duty class
Running time "T"
L1 - Light
6300
12500
L2 - Medium
3200
6300
L3 - Heavy
1600
3200
L4 - Very heavy
800
1600
FEM Group
1A m
2 m
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
% tempo di funzionamento
% caric
o
0
100
100
L1 Light
L2 Medium
L3 Heavy
L4
Very Heavy
2.6 CHOICE OF HOIST BASED ON FEM GROUPS
The duty class of hoist use is determined by two
parameters:
a) running time;
b) duty class.
Temporary service
As foreseen in the
FEM 9.681 e 9.682 rules, electric
self-braking motors for movement and lifting are
designed and manufactured for use in intermittent
service in relation to the selected duty class. However,
for example for long movement or high hook strokes,
these intermittent duty rates may not be respected. In
these cases, the hoist may be operated in
temporary
service with the possibility of establishing the running
time while taking into consideration the permissible
temperature limits of the motors. In these cases, make
sure the motors are not started more than ten times
and for the corresponding maximum running time, in
compliance with the aforementioned FEM standards,
of the chosen duty class (see table).
Comparison between duty classes
FEM section IX (standard hoists) E
FEM section I and ISO (special hoists)
FEM 9.511
FEM Sect. I-ISO
1C m
M2
1B m
M3
1A m
M4
2 m
M5
3 m
M6
4 m
M7
Temporary service (high hook strokes and long movements)
Group
Continuous
running
time min.
Max. no. of consecutive
start-ups during
the running time
FEM
ISO
1B m
M3
15
10
1A m
M4
2 m
M5
30
10
3 m
M6
Summary of Contents for XM SERIES
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