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Gearbox
Comprises a fully enclosed oil-immersed, triple reduction gear train with
Plasma Nitrided teeth for maximum wear resistance and strength. All high-speed
gears are helical form teeth. All shafts are supported on high quality
rolling element bearings for quiet efficient operation and maximum life.
Drive to the box is via a flexible coupling and hollow shaft drive.
Electronic Overload
A sensitive strain gauge and electronics that allow the accurate assessment
of loads, load weighing and slack rope detection. Can be fitted to two
or more hoists to summate total load and prevent the overload of a structure.
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Inverter
Drives
State of the art flux vector drives providing stable load holding at all
hoisting speeds. Dynamic braking and controlled acceleration provide smooth
load handling with a minimum of wear to the hoist mechanism. Morris incorporate
enhanced safety features by externally monitoring speed and direction
signals separately and linking them with the hoist's mechanical braking
system.
Hoist Motors
Parallel solid rotor, high torque squirrel cage motors designed specifically
for hoisting applications, allowing 40% ED, and 240 starts per hour as
standard. With 60% ED, 300 starts per hour available. Class F insulation
is standard. Higher insulation classes are achievable for specific applications.
Single or dual speed available from one motor; with 4:1 or 8:1 creep speeds.
Voltages to suit the world's supplies.
Hoist
Brake
Single disc, fail-safe electromechanical brake, energised separately from
the motor, with direct current to ensure a positive action. Fitted directly
onto the hoist gearbox input shaft, the brake provides greater safety
than traditional motor mounted brakes. Factory set torque needs no adjustment.
Requires minimal maintenance but is positioned for easy monitoring. The
brake is equipped with a precise hand release to allow the lowering off
of loads in power loss situations.
Mechanical Overload
An essential safety device that protects the hoist and structure against
damaging overloads, with built in dynamic filter to prevent nuisance tripping.
A requirement under the Machinery Directive for all hoists over 999Kg.
Condition Monitoring
Allows the monitoring of hoist operations in terms of time spent raising
and lowering the load and numbers of starts and stops. Other modules provide
for sensing of load values and no load situations. Alarms detect maximum
load. Interrogation with a PC or hand held unit provides management information
on maintenance regimes or can establish the utilisation of the equipment.
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