MAN16MG0
5
instructions
for
use
series
drh
1/2/3/4 -
dst
/
n
/
s
-
dst
/
r
-
drt
12
2.2.5 Noise
• The level of acoustic pressure emitted by the hoist at full load is always less than a level of 80dB (A). The incidence
of environmental characteristics like transmission from the ground through metallic structures, reflections caused
by combined machines and walls is not included in the level indicated.
• The vibrations produced by the hoist are not hazardous to the health of personnel who work with it. Excessive
vibration can be caused by a fault and should be immediately reported and eliminated the reliability of the hoist
is not affected.
2.2.1 Safety reference list
In the planning and construction of the DRH electric wire rope hoists the following standards and principal technical
regulations have been taken into account:
• EN-12100
/2010
“
Safety of machinery”.
• EN ISO 13849-1:2008 “General principles for design”
• EN 12077-2:2008 “Limiting and indication device”
• EN 13001-1:2009 “General design criteria – Part 1: general requirements”
• EN 14492-2:2006 “Winches and hoists – Part 2: Hoists”
• EN 60204-32/2009 “Safety of electrical equipment of lifting machines”
•
EN 60529
/97 “
Degrees of protection provided by enclosures (IP code)”
• ISO 4301-1/
88
“Lifting equipment classification”
• ISO 4308-1/
2003 “
Selection of wire ropes (for wire rope hoists DRH series)”
• DIN 15401 “Lifting hooks for lifting appliances; Single hooks”
• UNI 9466 “Lifting appliances shell drum. Design requirements (for wire rope hoists DRH series)”
• FEM 1.001/98 “Rules for the design of hoisting applicances”
• FEM 9.511/86 “Classification of mechanisms”
• FEM 9.661/86 “Dimensions and design of rope reeving components”
• FEM 9.683/95 “Selection of lifting and travel motors”
• FEM 9.755/93 “Measures for achieving safe working periods for serial hoists units (S.W.P.)”
• FEM 9.761/93 “Lifting force limiters for controlling the loading of motorized series hoists mechanisms”
• FEM 9.941/95 “Graphical symbols for control devices“
2.2.2 Protection and insulation of electrical components
• Lifting and travelling motors: Protection IP55 - Insulation class “F”
• Lifting motor brake and traveling IP23
• Limit switch: Minimum protection IP65 - Maximum voltage 500 V
• Cables: CEI 20/22 II - Maximum insulation voltage 450-750 V
2.2.3 Electrical power supply
• The DRH electric wire rope hoists are designed, of series, to be powered with alternating electric current with three-
phase voltage of: 400 V +/- 10% - 50Hz according to IEC 38-1.
2.2.4 Nominal conditions of use
• Temperature of use: minimum –10° C; m40° C
• Maximum relative humidity: 80%
• Maximum altitude 1000m above sea level.
• The machine must be placed in a well-ventilated place, free from corrosive vapours (acid vapours, saline clouds,
etc)
2.2
Technical information and service conditions
• It is forbidden to use the machine in an explosive environment or one which is potentially so, or
where the use of flameproof equipment is prescribed.
• It is necessary to allocate sufficient working space to ensure the safety of the operator and of the
maintenance staff.
13
instructions
for
use
series
drh
1/2/3/4 -
dst
/
n
/
s
-
dst
/
r
-
drt
MAN16MG0
5
2.2.6 Criteria and condition of use
• Correctly determine the operating limits of the hoist in order to ensure the correct functioning and the complete
correspondence to the operating systems of the work for which it is intended.
• The FEM 9.511 rule allows the classification of hoists according to the conditions of use.
• The necessary parameters to determine the limits of use for electric wire rope hoists are the following:
1) Actual lifting capacity; 2) Stress level; 3) Average duration of daily use.
1) Actual lifting capacity
• This is determined by the heaviest load to be lifted.
2) Stress level
•
The stress level is determined considering the actual entity of the loads lifted and it is ascribable to one of the
four spectrums of load shown below which determine the type of service.
The nominal lifting capacity of the hoist must be
≥
the actual lifting capacity
Lifting capacity = kg
3) Average duration of daily use - Tm=hours
• For
lifting
operations the average duration of use is calculated in the following way:
Hoists which rarely lift maxi-
mum loads but mainly redu-
ced loads
Hoists which lift approximately
the same number of maximum,
medium and reduced loads
Hoists which frequently lift
the maximum load but
normally medium loads
Hoists which regularly lift
loads approximately equal
to the maximum load
It is the average of the actual
runs of the load
It is the number of complete
ascents and descents carried out
in an hour
Hoist running time
in a whole day
It is the distance covered
by the load in a minute
1) Light
2) Medium
3) Heavy
4) Very Heavy
100
l
o
a
d
(%)
100
l
o
a
d
(%)
100
l
o
a
d
(%)
100
l
o
a
d
(%)
Actual hook run
AHR = m
Running time
Rt = hours
Lifting speed
S = m/min.
Operative cycles
C/h = N° cycles per hour
It is the average of the length L
of the trolley running beam
It is the number of complete runs
(right/left) carried out in an hour
It is the running time
of the trolley in a day
It is the distance covered by the trolley
in a minute of continuous running
Actual average run
AAR (m) = L/2
Operative cycles
C/h = N° cycles for hour
Running time
Rt = ore
Travel speed
S = m/min.
•
For
travel
operations the average duration of use is determined in the following way:
time (%)
0 10 50 100
0,1
0,4
time (%)
0
0,2
0,73
0,47
16,7 33,3 50
100
0
0,4
50
100
0
0,8
90 100
time (%)
time (%)
Tm (hours) = AHR x C/h x Rt
30 x S
hook
travel
ascent
fall
pause
time
pause
cycle (max. 10 min)
Tm (hours) = AAR x C/h x Rt
30 x S
trolley
travel
right
left pause
time
pause
cycle (max. 10 min)
KMAN16MG05
Содержание DRH 1 Series
Страница 128: ...KMAN16MG05...
Страница 129: ......
