Fläkt Woods
8265 GB 2011.10
3
Specifications are subject to alteration without notice
Installation and maintenance instruction
Fläkt Woods three phase asyncronous motor
Manufacturer: ABB
Foundation
The purchaser bears full responsibility for preparation of
the foundation.
Metal foundations should be painted to avoid corrosion.
Foundations must be even, and sufficiently rigid to with-
stand possible short circuit forces. They shall be dimen-
sioned as to avoid the occurrence of vibration due to
resonance.
Foundation studs
Bolt the foundation studs to the feet of the motor and
place a 1-to-2 mm shim between the stud and the feet.
Align the motor directly using appropriate means.
Grout the studs with concrete, check, alignment and drill
holes for locating pins.
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.
Do not exceed the maximum belt forces (i.e. radial bearing
loading) stated in the relevant product catalogues.
Connection
The normal machine design is with the terminal box on
top and with cable entry possible from both sides.
Some machines are available, as a special option, 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!
Excessive belt tension will damage
bearings and can cause shaft breakage.
Connection diagrams for auxiliary elements are found
inside the terminal box cover.
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.
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.
To comply with EMC-requirements, 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.
WARNING!
Voltage may be connected at standstill
inside the terminal box for heating
elements or direct winding heating.
WARNING!
The capacitor in single-phase motors
can retain a charge that appears
across the motor terminals, even when
the motor has reached standstill.
0.75 mm
70 mm
> 150 mm
min 50 mm
Cables/wire s
Plate/strip
U1
V1
W1
PE
3 ~ M
Driven machinery
Potential equalisation
