7
BA491701-en
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1.10
Safety Features
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1.10.1
Locking Device
The locking device serves to prevent inadvertent lowering motions caused by gear,
load nut or lifting screw failure. The carriage is blocked by safety wedge (1) and
counterwedge (2).
1.10.2
Braking Motor
The motors are equipped with AC spring pressure brakes. Once the motors
are switched off, the brakes prevent any further movements.
1.10.3
Phase Sequence Relay
The phase sequence relay in the power supply unit ensures safe and
independent operation.
1.10.4
Thermal Overload Protection
Overload protection via electronically monitored thermoswitches.
1.10.5
Safety Shutdown after Motor Overload
The motor load is permanently monitored by the control PCB. If an overload of
≥
15 % occurs, the
system will switch off automatically. In this case the lift cannot be raised any more, but it can be
normally lowered to bottom position.
1.10.6
Warning and Information Labels
Do not change or remove the warning and information labels. Order replacement for defective
labels.
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