Assembly And Dismantling - ABB MT Série Notice Technique

Drain holes
Always check that open drain holes face downward.
Machines with closable plastic drain plugs are delivered
with these open.
In extremely dusty environments, all drain holes should
be closed.
Alignment
Correct alignment is essential to avoid bearing failures,
vibrations and possible fractured shaft extensions.
Slide rails and belt drives
•
Fasten the machine to the slide rails as shown in
figure 2.
•
Place the slide rails horizontally on the same level.
•
Check that the machine shaft is parallel with driven, or
driving, shaft.
•
Any belt must be tensioned according to the supplier's
instructions.
WARNING
Excessive belt tension will damage bearings and
can cause shaft breakage.
Do not exceed the maximum belt forces (i.e. radial
bearing loading) stated in the relevant product
catalogues.
Connection
Normal machine design has the terminal box on top and
cable entry possible from both sides.
As a special option, some machines are available with
top mounted terminal boxes rotatable 4 x 90°, and some
with side mounted terminal boxes.
Availability of these solutions is described in the product
catalogues.
Unused cable entries must be closed.
As well as main winding and earthing terminals, the
terminal box can also contain connections for
thermistors, standstill heating elements, bimetallic,
switches, or PT 100 resistance elements.
WARNING
Voltage may be connected at standstill inside the
terminal box for heating elements or direct
winding heating.
Connection diagrams for auxiliary elements are found
inside the terminal box cover.
WARNING
The capacitor in single-phase motors can retain
a charge that appears across the motor
terminals, even when the motor has reached
standstill.
In frequency converter applications motor frame
external earthing must be used for equalising the poten-
tial between the motor frame and the driven machine,
unless the two machines are mounted on the same
metallic base. For motor frame sizes above IEC 280,
use 0.75 x 70 mm flat conductor or at least two 50 mm²
round conductors. The distance of the round conductors
must be at least 150 mm from each other.
LV Motors/Machine Instructions 10-2000
This arrangement has no electrical safety function; the
purpose is to equalise the potentials. When the motor
and the gearbox are mounted on a common steel funda-
ment, no potential equalisation is required.
Potential equalisation
V1
U1
W1
PE
3 ~ M
0.75 mm
Driven machinery
To comply with EMC-requirements, use only cables and
connectors approved for this purpose. (See instruction for
frequency converters.)

Assembly and dismantling

General
Dismantling and assembly of machines must be carried
out by qualified personnel using only suitable tools and
working methods.
Bearings
Special care should be taken with the bearings.
These must be removed using pullers and fitted by
heating or using special tools for the purpose. How
to replace bearings is described in detail in a separate
instruction leaflet available from ABB Sales Office.
Fitting coupling halves and pulleys
Coupling halves and pulleys must be fitted using suitable
equipment and tools that do not damage the bearings.
Never fit a coupling half or pulley by hammering into
place or remove it using a lever pressed against the
body of the machine.
Mounting accuracy of coupling half :
check that the clearance b is less than 0,05 mm and
that the difference a1 to a2 is also less than 0,05 mm.
See figure 3.
Balancing
The rotor of the machine is dynamically balanced.
As standard, balancing has been carried out using half
key, and the shaft is marked with a RED tape, with the
text "Balanced with half key".
To avoid vibration the coupling-half or pulley must be
balanced with half key after the keyway has been
machined.
In the event of balancing with full key the shaft is
marked with a YELLOW tape, with the text "Balanced
with full key".
To avoid vibration the coupling-half or pulley must be
balanced without a key after the keyway has been
machined.
In case balancing without key, the shaft is marked with
a BLUE tape, with the text "Balanced without key".
Plate/strip
Cables/wires
> 150 mm
70 mm
2
min 50 mm
5