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AVANTI Service Lift for Wind Turbines
5.7 Service lift safety devices
5.7.1 Electromagnetic motor brake
Electromagnetic spring-loaded brake which
engages automatically
– on releasing the up/down push button and
– following a power failure.
5.7.2 EMERGENCY STOP
When the red EMERGENCY STOP (pendant
control) switch is pushed in an emergency, all
control is interrupted. After remedying the fault,
control is reactivated by turning the switch clock-
wise, until it pops out again.
5.7.3 EMERGENCY STOP fixed (optional)
Only in service lifts with an AUTOMATIC function
installed. A backup switch to the pendant control
EMERGENCY STOP switch is situated on one of
the side panels inside the lift (Fig. 8).
5.7.4 Automatic operation switch
A switch situated inside the pendant control
holder. It prevents the lift from being controlled
from the inside when the control is in automatic
mode.
5.7.5 Overload limiter
The overload limiter is built into the wire rope
traction system and will prevent upward travel in
the event of an overload. A warning signal
(buzzer) is triggered which will stop only when the
cause of the overload has been removed.
Possible reasons for activation of the limiter:
- The service lift is overloaded or
- the service lift encounters an obstacle during
upward travel.
Operator intervention:
- Reduce the load to below the overload limit, or
- lower the lift until it is free of the obstacle and
remove the obstacle before using the lift again.
5.7.6 Fall arrest device
Service lifts for personnel transportation must be
equipped with a fall arrest device which will
prevent the load from falling.
Fall arrest device type ASL.The fall arrest devices
ASL are opened manually (Fig. 7).
The speed of the safety wire rope passing
through the device is continuously monitored,
and the jaws automatically close in the event of
sudden excessive speed.
This protects the service lift from
a) Traction wire rope breaks and
b) Hoist failures.
The fall arrest device can also be engaged
manually in an emergency by pressing the
Emergency stop button. The window is used to
monitor the function of the centrifugal force
mechanism during operation.
5.7.7 Yellow flash (optional)
An optional set of flashes can be mounted on the
top and at the base of the lift. The flashes indicate
when the lift is in movement (Fig 9a).
4.7.8 Emergency light (optional)
An emergency light can be installed to provide
illumination inside the lift with and without electric
supply. The operation modes can be selected
by means of a switch (Fig. 9b).
Fig. 7
Fall arrest device
ASL508
Locked
Unlocked Window
Fig. 8
Emergency stop
and automatic
operation switch
Fig. 9a
Fixed
Emergency
stop button
Fig. 9b
Automatic
operation
switch
AT00016288 Shark L AECO EN update.indd 14
11/14/2018 4:02:44 PM
