Electrical Connection - Siemens 1SE0 Operating And Maintenance Manual

motor. Preferably tolerance of the bore
of pulley/coupling/pinion should be H7.
Transmission elements must be fitted and
removed only by means of suitable tool.
Refer fig.2. Transmission elements should
never be hammered as this will damage
the bearings.
Caution
The keys are only secured against
falling-out during transport. If the motor
has two shaft ends, and a power take-
off element is only fitted to one end,
steps must be taken to prevent the key
at the other end from being slung out.
Install the motor in such a manner that the
cooling air has free access and can escape
unobstructed. Discharged air or hot air
from neighboring equipment, must not be
sucked in again. Clean the entire path of air
over the motor (between ribs and air inlet
in fan cowl) at regular intervals to remove
any foreign deposits, preferably by means
of compressed air.
For foot mounted motors to be fixed on the
wall a support should be provided for the
mounting feet from below.
In the case of motors with shaft end
facing upwards or downwards, measures
must be taken (by the user) to ensure that
no water or dust can penetrate into the
upper bearing.
Motors that are directly coupled should
be carefully & correctly aligned. The axes
of the driven machine shaft and motor
shaft should be in a straight line and
there should be no angular displacement
between these two. Shafts can be aligned
perfectly by keeping metal shims under the
foot of the motor. The center-lines of the
shafts should be parallel and the parallel
8
displacement between the two center-
lines should not be more than 0.03mm.
The clearance between the couplings
halves measured at four peripheral points
must also be within 0.03mm.
If belt drive is used, install the machine in
such a manner that it can be shifted on its
base (e.g. on slide rails) to obtain correct
belt tension. Excessive belt tension may
result in damage to the bearing and /or
shaft. For permissible radial loads on shaft
extension and recommended pulley sizes
refer the Siemens catalog or contact our
office.
Caution
Excessive belt tension may result in
damage to the shaft / bearings; for
permissible values, see catalog or
enquire.
Due attention should be given to the
measures necessary to prevent accidental
touching of rotating parts (couplings,
pulleys, etc.)
Quiet running
Stable foundations or mounting conditions,
exact alignment of the motors and a
well-balanced transmission element are
essential for quiet vibration-free running. If
necessary, shims should be inserted under
the motor feet to prevent strain.
3.4

Electrical connection

Examine the rating plate data and ensure
that it matches with the power circuit to
which the motor is to be connected. Check
to see that system voltage and frequency
agree with the data given on the rating
plate. Motors up to 1.5kW are connected in
star & above 1.5kW are connected in delta.