Electrical Connection - WEG ODP Instrucciones Para La Instalacion Y Mantenimiento

the bearings.
Suitable assembly of coupling:
Specially in cases of direct couplings, motor
shaft must be aligned axially and radially with
the driven machine shaft.
Incorrect alignment can lead to bearing
damage, vibrations or even cause shaft
rupture.
Correct alignment can be ensured with the
use of dial gauges, as shown in figures 4.6.1,
4.6.2 and 4.6.3.
If considering a complete shaft rotation,
misalignment should not exceed 0.05 mm.
Fig. 4.6.1 - Axial reading (parallelism)
Fig. 4.6.2 – Radial reading (concentricity)
Fig. 4.6.3 – Axial and radial reading combined
The axial alignment ("E" dimension) between
the couplings must be 3mm minimum to
compensate the thermal shaft dilation.
If required, WEG can offer its personnel
duly trained as well as laser equipment to
make motor and driven machine alignment/
leveling.
Expansion effect of the components may
change the alignment/leveling conditions
during motor operation.
4.7 - Couplings
When using pulley and belt/chain drive
(coupling), follow the instruction given
below:
 R emove shaft-locking device (if any) before
installing the motor.
 B elts must be tighten just enough to avoid
slippage when running, according to the
specifications stated on the belt supplier
recommendation.
 T o make the installation of the pulley on the
shaft easier, it is recommended to heat up
the pulley at 80°C and have it mounted at
hot, using suitable tools.
 T o avoid bearing and shaft end damage,
assembly and disassembly the pulleys must
be made with suitable tools.
 W hile assembly and disassembly a pulley,
never make pressure or knocks on the
bearings.
 A lways use flexible couplings; rigid couplings
require special bearing arrangement as well
as axial and radial alignment of the shafts.
e
xcessive belT
damage The bearings and lead To a
probable shafT rupTure
Couplings used must be suitable to
withstand radial and axial vibrations during
operation. Special care must be taken to
avoid that the allowable load and speed
limit values showing in the catalogs are not
exceeded.
4.8 – Electrical Connection
Make sure the motor is connected to the
correct power supply.
Cable gauges and protection devices must
be designed based on motor rated current.
8
warning:
/
chain Tension will
.