Sky Climber
ZEABORN GUIDELINES
18.11.2020 Version 1
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2.3 SKY LOCK OVERSPEED SENSITIVE FALL ARREST DEVICE
The Sky Lock overspeed brake provides additional backup to the safety devices built into the Sky
Climber hoist. The Sky Lock is a device which senses the dynamic speed of the wire rope as it passes
through the Sky Lock mechanism. If, as the Sky Lock brake is travelling down the wire rope, the factory
pre-set speed is exceeded, the Sky Lock brake will lock onto the wire rope and support the load. The
secondary steel wire rope cannot be released until the load on the Sky Lock brake is relieved.
The right type of Sky Lock (See Figure 2.3) should be used with the right type of hoist (see 2.2.1). These
models provide a manual trip lever for manual activation or functional checking. Installation, operating
procedures and functional checking procedures are defined in Section 5.4.2
Figure 2.3
2.4 OVERLOAD & UNDERLOAD DEVICE
The over-/underload device is a combined device which detects an overload or underload situation to
avoid danger to persons and damage to machines. It is mounted for each hoist on the end stirrup or on
the walk true stirrup. Refer to the “Safety Devices Assembly Manual” for more detailed drawings.
The overload device prevents the hoist from moving upwards in an overload situation. The underload
device prevents the hoist from moving downwards in an underload situation. In both situations an audio
alarm will occur to warn the operators.
