Page 5
AN120076.000_EN
The following table shows the theoretical service life D
as a function of the FEM group and the load spectrum
factor.
Theoretical service life D, (h)
FEM groups
1Dm
M1
1Cm
M2
1Bm
M3
1Am
M4
2m
M5
3m
M6
4m
M7
5m
M8
Line
load group / ropes|load
factor
Theoretical service life D (h)
1
light 1 / L1
K = 0.5
(Km
1
= 0.125
0.5
3
)
800
1600
3200
6300
12500
25000
50000
100000
2
medium 2 / L2
0.5 < K < 0.63
(Km
2
= 0.25
0.63
3
)
400
800
1600
3200
6300
12500
25000
50000
3
heavy 3 / L3
0.63 < K < 0.8
(Km
3
= 0.5
0.8
3
)
200
400
800
1600
3200
6300
12500
25000
4
very heavy 4 / L4
0.8 < K < 1
(Km
4
= 1
1
3
)
100
200
400
800
1600
3200
6300
12500
When the theoretical service life D has elapsed, cranes
and hoists connected to them may represent a risk to
persons and machines. If a load population recorder is
used, it is easier to determine the actual hours of use S,
from which the remaining service life is calculated.
In the case of standard hoists equipped with anLIS–SE
with integrated load population recorder, the operating
conditions are recorded electronically. The inspector
can have the actual hours of use S and other parame-
ters displayed at any time (see Section 5.3).
The FEM group is stored in the LIS–SE unit and can be
displayed using the operator terminal. The group is in-
dicated in hours at full load.
_________________________________
2.4.2
Definitions
Theoretical service life
The theoretical service life D is the calculated hours of
service of a crane or a hoist over a period of about 10
years taking into consideration the group determined
in accordance with FEM 9.511.
Actual hours of use
The actual hours of use S represent the effective use of
the unit determined on the basis of operating hours and
load populations.
Total service life
The total service life of a standard hoist is the period
from initial commissioning through to final decommis-
sioning of the hoist.
Remaining service life
The remaining service life or theoretical remaining ser-
vice life of a hoist is the difference between the actual
hours of use S and the theoretical service life D. When
the theoretical service life has elapsed, the hoist must
be overhauled.I
Safe working period (SWP)
The hoist is within its safe working period if S/D is less
than or equal to 1.
2.5
Integrated Control Functions
In addition to overload protection functions, the LIS-
SE features a number of integrated hoist control func-
tions.
D
AC- 4 disable control
In order to prolong the service life of the high lifting
speed contactor, the LIS- SE unit prevents the con-
tactor from being switched off until the set start- up
delay of the motor has elapsed. This function signi-
ficantly reduces contact erosion.
D
Braking with the motor acting as a generator
Each time the hoist is braked from high speed, the
LIS- SE unit ensures that the hoist is first braked by
operating the motor as a generator at low speed
before the brake is activated. This significantly ex-
tends the service life of the brake rotor.
D
Motor current monitoring function
LIS- SE monitors the current inputs.
If excessive motor current is detected for an inad-
missibly long time, the unit immediately switches
off main contactor K1.
Содержание LIS-SE
Страница 10: ...Page 10 Data 01 03 2016 Standard wiring diagram LIS SE with one hoist Figur 2...
Страница 11: ...Page 11 AN120076 000_EN Standard wiring diagram LIS SE with two hoists Figur 3 Katzumschaltung...
Страница 12: ...Page 12 Data 01 03 2016 Standard wiring diagram LIS SE with twin hoist Figur 4 schnell...