Gearless Lift Machine
WSG-S2.3
Operating Instructions
Seite/page
9
Datum/date
08.10.2013
Stand/version
0.8
Änderungen vorbehalten!
Subject to changes without notice!
5.2. Electrical connection
5.2.1. General
• Before starting any work on the machines, ensure that the lift machine or system is properly isolated.
Before making any electrical connections check that
• the connecting cables are suitable for their specific application and for the relevant voltages and currents.
• sufficiently dimensioned connecting cables, torsion, strain and shear relief, as well as anti-kink protection are
provided
• the protective conductor is connected to the earthing terminal
• there are no foreign bodies, dirt or moisture in the terminal box
• cable entries not in use and the terminal box itself are tightly sealed to prevent the ingress of dust or splash-
ing water.
Securing the machine
• The rope force can be applied to the lift machine in any direction.
• The machine should be mounted on rubber pads for vibration damping.
• Fasten the machine using bolts
- 4 x M 24 bolts (strength class 8.8; tightening torque: 680 Nm) in case of using the threaded holes or
- 6 x M 24 bolts (strength class 8.8; tightening torque: 680 Nm) in case of using the mounting holes
• After completing the adjusting work or after a breakdown, tighten all the fastening bolts of the machine,
using the specified torque.
• The permissible uneveness of the mounting surface is 0.1mm. The mounting surface must be sufficiently dis-
tortion-resistant and stable to accommodate the forces occurring in the system.
• Lift machines are generally equipped with rope slip-off guards. After putting the ropes in place, adjust them
so that the distance between the rope and the rope slip-off guard does not exceed 1.5 mm.
• If the lift machine is not installed at the head of the machine room as is usually the case, it may be necessary
to modify the fitting of the rope slip-off guard. Optional rope slip-off guards installed in the foot area of
the machine are available for this purpose.
CAUTION
The insulation system of the motors is designed such that they can be connected to a con-
verter with a maximum DC link voltage U
link max
up to max. 700 V DC.
U
link max
is the maximum value of the DC link voltage which is only transient and approxi-
mately equivalent to the inception voltage of the braking chopper or of the energy recovery
unit.
The maximum permissible rate of voltage rise (dU/dt) at the motor terminals is 4 kV/
m
s. The
overvoltage at the motor terminals must not exceed 1.56 kV. It may be necessary to use
motor current filters or reactors to achieve these values.
WARNING
The electrical connection may only be made by a qualified electrician.
