Mounting And Alignment Of The Motor; Radial Forces And Belt Drives; Motors With Drain Plugs For Condensation; Cabling And Electrical Connections - ABB MT Série Manuel D'installation, D'exploitation Et De Maintenance

Coupling halves and pulleys must be fitted on the shaft by
using suitable equipment and tools which do not damage
the bearings and seals.
Never fit a coupling half or pulley by hammering or
removing it by using a lever pressed against the body of the
motor.
4.6 Mounting and alignment
of the motor
Ensure that there is enough space for free airflow around
the motor. It is recommended to have a clearance between
the fan cover and the wall etc. of at least ½ of the air
intake of the fan cover. Additional information may be
found from the product catalog or from the dimension
drawings available on our web pages: www.abb.com/
motors&generators.
Correct alignment is essential to avoid bearing, vibration
and possible shaft failures.
Mount the motor on the foundation using the appropriate
bolts or studs and place shim plates between the
foundation and the feet.
Align the motor using appropriate methods.
If applicable, drill locating holes and fix the locating pins into
position.
Mounting accuracy of coupling half: check that clearance
b is less than 0.05 mm and that the difference a1 to a2 is
also less than 0.05 mm. See figure 2.
Re-check the alignment after final tightening of the bolts or
studs.
Do not exceed permissible loading values for bearings as
stated in the product catalogs.
Check that the motor has sufficient airflow. Ensure that no
nearby objects or direct sunshine radiate additional heat to
the motor.
For flange mounted motors (e.g. B5, B35, V1), make sure
that the construction allows sufficient air flow on the outer
surface of the flange.

4.7 Radial forces and belt drives

Belts must be tightened according to the instructions of the
supplier of the driven equipment. However, do not exceed
the maximum belt forces (i.e. radial bearing loading) stated
in the relevant product catalogs.
WARNING!
Excessive belt tension will damage bearings and can
cause shaft damage.
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ABB Motors and Generators | Low voltage motors manual, 3GZF500730-85 Rev F 02-2015
Standard_Manual_LV_Motors_ML_revF_Book.indb 8
4.8 Motors with drain plugs
for condensation
Check that drain holes and plugs face downwards. In
vertical position mounted motors, the drain plugs may be in
horizontal position.
Motors with sealable plastic drain plugs are delivered in an
open position. In very dusty environments, all drain holes
should be closed.
4.9 Cabling and electrical
connections
The terminal box on standard single speed motors normally
contains six winding terminals and at least one earth
terminal.
In addition to the main winding and earthing terminals, the
terminal box can also contain connections for thermistors,
heating elements or other auxiliary devices.
Suitable cable lugs must be used for the connection of all
main cables. Cables for auxiliaries can be connected into
their terminal blocks as such.
Motors are intended for fixed installation only. Unless
otherwise specified, cable entry threads are metric. The IP
class of the cable gland must be at least the same as those
of the terminal boxes.
Certified conduit hub or cable connector has to be used at
the time of installation.
NOTE!
Cables should be mechanically protected and
clamped close to the terminal box to fulfill the
appropriate requirements of IEC/EN 60079-0 and
local installation standards.
Unused cable entries must be closed with blanking
elements according to the IP class of the terminal box.
The degree of protection and diameter are specified in the
documents relating to the cable gland.
WARNING!
Use appropriate cable glands and seals in the cable
entries according to the type and diameter of the
cable.
Earthing must be carried out according to local regulations
before the motor is connected to the supply voltage.
The earth terminal on the frame has to be connected to
PE (protective earth) with a cable as shown in Table 5 of
IEC/EN 60034-1:
6/2/2015 6:44:25 PM